ML041270333

Connecticut, Inc., 2003 Annual Radiological Environmental Operating Report

ML041270333
Person / Time
Site:	Millstone
Issue date:	04/28/2004
From:	Price J Dominion Nuclear Connecticut
To:	Document Control Desk, NRC/FSME
References
04-259
Download: ML041270333 (108)

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Dominion Nuclear Connecticut, Inc.

Millstone Power Station

,-e-Vfl Dominion-Rope Ferry Road Waterford. CT 06385 APR 2 8 2004 U.S. Nuclear Regulatory Commission Serial No.04-259 Attention: Document Control Desk MPS Lic/KD RO Washington, DC 20555 Docket Nos. 50-245 50-336 50-423 License Nos. DPR-21 DPR-65 NPF-49 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNITS 1, 2 AND 3 2003 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT This letter transmits the Annual Radiological Environmental Operating Report for the Millstone Power Station, for the period January 2003 through December 2003. This report satisfies the requirements of Section 5.7.2 of the Millstone Unit No. 1 Permanently Defueled Technical Specifications, and of Sections 6.9.1.6a and 6.9.1.3 of the Unit No.

2 and Unit No. 3 Technical Specifications, respectively.

If you should have any questions regarding this submittal, or require additional information, please contact Mr. David W. Dodson at (860) 447-1791, extension 2346.

Very truly yours, Jo1 J aPrice

~6Vice President - Millstone 7§Ei~~ 2~S

Serial No.04-259 2003 Radiological Environmental Operating Report Page 2of2 Attachments: 1 Commitments made in this letter: None.

cc: U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 Mr. D. G. Holland Project Manager U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 7E1 Rockville, MD 20852-2738 Mr. R. Prince NRC Inspector U.S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406-1415 Mr. V. Nerses Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8C2 Rockville, MD 20852-2738 Mr. S. M. Schneider NRC Senior Resident Inspector Millstone Power Station (2 copies)

Director Bureau of Air Management Monitoring & Radiation Division Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127

Serial No.04-259 Docket Nos. 50-245 50-336 50-423 Attachment 1 2003 Annual Radiological Environmental Operating Report Millstone Power Station Units 1, 2 and 3 Dominion Nuclear Connecticut, Inc. (DNC)

Millstone Power Station 2003 Radiological Environmental Operating Report January 1, 2003 - December 31, 2003 am Dominion Nuclear Connecticut, Inc.

Unit License Docket 1 DPR-21 50-245 2 DPR-65 50-336 3 NPF-49 50423 I

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ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT MILLSTONE POWER STATION I

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2003 MILLSTONE UNIT 1, DOCKET NO. 50-245 MILLSTONE UNIT 2, DOCKET NO. 50-336 MILLSTONE UNIT 3, DOCKET NO. 50-423 By the Dominion Nuclear Connecticut, Inc.

Waterford, Connecticut

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE OF CONTENTS

1. EXECUTIVE

SUMMARY

1-1

2. PROGRAM DESCRIPTION 2-1 2.1. Sampling Schedule and Locations 2-1 2.2. Samples Collected During Report Period 2-7

3. RADIOCHEMICAL RESULTS 3-1 3.1. Summary Table 3-1 3.2. Data Tables 3-11

4. DISCUSSION OF RESULTS 4-1 4.1. Gamma Exposure Rate (Table 1) 4-1 4.2. Air Particulate Gross Beta Radioactivity (Table 2) 4-3 4.3. Airborne Iodine (Table 3) 4-3 4.4. Air Particulate Gamma (Table 4A-D) 4-5 4.5. Air Particulate Strontium (Table 5) 4-5 4.6. Soil (Table 6) 4-5 4.7. Cow Milk (Table 7) 4-6.

4.8. Goat Milk (Table 8) 4-6 4.9. Pasture Grass and Feed (Table 9) 4-7 4.10. Well Water (Table 10) 4-7 4.11. Reservoir Water (Table 11) 4-8 4.12. Fruits and Vegetables (Table 12) 4-8 4.13. Broad Leaf Vegetation (Table 13) 4-8 4.14. Seawater (Table 14) 4-9 4.15. Bottom Sediment (Table 15) 4-11 4.16. Aquatic Flora (Table 16) 4-11 4.17. Fish (Tables 17A and 17B) 4-11 4.18. Mussels (Table 18) 4-12 4.19. Oysters (Table 19) 4-12 4.20. Clams (Table 20) 4-13 4.21. Scallops (Table 21) 4-13 4.22. Lobsters (Table 22) 4-13

5. OFFSITE DOSE EQUIVALENT COMMITMENTS 5-1

6. DISCUSSION 6-1 APPENDIX A - LAND USE CENSUS FOR 2003 A-1 APPENDIX B - DNC QA PROGRAM B-1 APPENDIX C -

SUMMARY

OF INTERLABORATORY COMPARISONS C-1 APPENDIX D - ERRATA FOR 2002 D-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Executive Summary 1'- - - - . ' - .- - " ' '. - .. .. -11.1... - .- - . ' .--.1 I I. . . .;

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

1. EXECUTIVE

SUMMARY

The radiological environmental monitoring program for the Millstone Power Station was continued for the period January through December 2003, in compliance with the Technical Specifications and the Radiological Effluent Monitoring and Offsite Dose Calculation Manual.

The Radiological Protection and Chemistry Department of Dominion Nuclear Connecticut, Inc. (DNC) prepared this annual report.

Radiological Protection and Environmental Services staff performed sample collection and preparation. Framatome ANP DE&S Environmental Laboratory performed gamma exposure rate measurements and laboratory analyses.

Thermoluminescent dosimeters (TLDs) were used to measure direct gamma exposure in the vicinity of the station and as far away as 14 miles. Radiochemical and radiological counting analyses of samples were performed to detect the presence of any station related radioactivity.

Samples included air particulate and charcoal filters, soil, goat milk, pasture grass, hay, well water, broad leaf vegetation, fruits, vegetables, sea water, bottom sediment, aquatic flora, fish, mussels, oysters, clams, and lobsters. In evaluating the results of these analyses it is necessary to consider the variability of natural and man-made sources of radioactivity, radionuclide distribution in the environment and radionuclide uptake in environmental media. This variability is dependent on many factors including station release rates, past spatial variability of radioactive fallout from nuclear weapons tests and on-going redistribution of the fallout, contribution from cosmically produced radioactivity, soil characteristics, farming practices, and feed type. Significant variations in measured levels of radioactivity could be caused by any one of these factors. Therefore, these factors need to be considered in order to properly explain any variations in radiation detected and to distinguish between natural and nuclear station related radioactivity.

Millstone Unit 1 is permanently shutdown. The annual capacity factor for Millstone Unit 2 was 80.0% based on Design Electrical Rating (DER). In March, Unit 2 was temporarily shutdown due to a leak in the charging system. Unit 2 was also shutdown in the third quarter for 2R15 refueling and maintenance. The annual capacity factor for Unit 3 was 98.8% based on Design Electrical Rating (DER). The radioactive releases of gaseous effluents in 2003 were comparable to years when one or more units operated for the majority of the year. Radioactive releases in liquid effluents continue to be low.

No station effects were detected in terrestrial media. The predominant radioactivity, except for a few aquatic sample results, was that from outside sources, such as fallout from nuclear weapons tests and naturally occurring radionuclides. Monitoring of the aquatic environment in the 1-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station area of the discharge indicated the presence of the following station related radionuclides: Cobalt-60, Silver-1Orm, Cesium-137 and Tritium. Due to the decreasing trend in liquid effluent releases, a corresponding decrease is observed in measured levels of radionuclides in the environment. Doses from the 2003 measured levels are well below those required by each Unit's Safety Technical Specifications (10CFR50 Appendix I, Design Guidelines).

Cesium-137 and Strontium-90 were measured in goat milk. Cesium-137 was also detected in several pasture grass and hay samples and all soil samples. These levels are the result of nuclear weapons testing in the 1960's and not the result of station operation. This can be concluded because insufficient quantities of these isotopes have been released by the station to account for the measured concentrations and the presence of these isotopes have been consistently declining since the early 1960's after signing of the Nuclear Test Ban Treaty.

The radiation dose (dose equivalent commitment) to the general public from the station's discharges has been evaluated by two methods. One method utilizes the measured station's discharges and conservative transport models and the other utilizes the measured concentrations of radioactivity in the environmental media. The maximum whole body dose (station boundary) that could occur to a member of the general public as a result of station operation was 0.07 millirem. This dose is 0.3 percent of the standard (i.e., 25 millirem to the whole body at the station site boundary) as set by the Environmental Protection Agency on the maximum allowable dose to an individual of the general public.

Historically, the average whole body dose for a member of the public residing within 50 miles of the station is generally three orders of magnitude less than the maximum individual whole body dose. The standards of the Environmental Protection Agency are a small fraction (less than 10 percent) of the 284 mrem per year normal Connecticut resident background radiation (NCRP94) and are designed to be inconsequential in regard to public health and safety. Station related doses are even a smaller fraction of the natural background. Therefore, the station related doses have insignificant public health consequences.

1-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

2. PROGRAM DESCRIPTION 2.1. Sampling Schedule and Locations The sample locations and the sample types and frequency of analysis are given in Tables 2-1 and 2-2 and Figures 2.1-1 and 2.1-2. The program as described here includes both required samples as specified in the Radiological Effluent Monitoring and Offsite Dose Calculation Manual and any extra samples.

2-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Table 2-1 Environmental Monitoring Program Sampling Tvpes and Locations Location Direction & Distance Number* Location Name From Release Point** Sample Types 1-I On-site - Old Millstone Rd. 0.6 Mi, NNW TLD, Air Particulate, Iodine, Vegetation 2-I On-site - Weather Shack 0.3 Mi, S TLD, Air Particulate, Iodine 3-I On-site - Bird Sanctuary 0.3 Mi, NE TLD, Air Particulate, Iodine, Soil 4-I On-site - Albacore Drive 1.0 Mi, N TLD, Air Particulate, Iodine, Soil 5-I MP3 Discharge 0.1 Mi, SSE TLD 6-I Quarry Discharge 0.3 Mi, SSE TLD 7-I Environmental Lab Dock 0.3 Mi, SE TLD 8-I Environmental Lab 0.3 Mi, SE TLD 9-I Bay Point Beach 0.4 Mi,W TLD 10-I Pleasure Beach 1.2 Mi, E TLD, Air Particulate, Iodine, Vegetation 11-I New London Country Club 1.6 Mi, ENE TLD, Air Particulate, Iodine 12-C Fisher's Island, NY 8.0 Mi, ESE TLD 13-C Mystic, CT 11.5 Mi, ENE TLD 14-C Ledyard, CT 12.0 Mi, NE TLD, Soil 15-C Norwich, CT 14.0 Mi, N TLD, Air Particulate, Iodine 16-C Old Lyme, CT 8.8 Mi,W TLD 17-I Site Boundary 0.5 Mi, NE Vegetation 21-I Goat Location # 1 2.0 Mi, N Milk 22-I Goat Location #2 5.2 Mi, NNE Milk 24-C Goat Location #4 29.0 Mi, NNW Milk 25-I Within 10 Miles Within 10 Miles Fruits & Vegetables 26-C Beyond 10 Miles Beyond 10 Miles Fruits & Vegetables 27-I Niantic 1.7 Mi, WNW TLD, Air Particulate, Iodine 28-I Two Tree Island 0.8 Mi, SSE Mussels 29-I West Jordan Cove 0.4 Mi, NNE Clams 30-I Niantic Shoals 1.5 Mi, NNW Mussels 31-I Niantic Shoals 1.8 Mi, NW Bottom Sediment, Oysters 31-X Niantic Shoals 1.8 Mi, NW Scallops 32-I Vicinity of Discharge Bottom Sediment, Oysters, Lobster, Fish, Seawater 32-X Vicinity of Discharge Fucus 33-I Seaside Point 1.8 Mi, ESE Bottom Sediment 33-X Seaside Point 1.8 Mi, ESE Fucus 34-I Thames River Yacht Club 4.0 Mi, ENE Bottom Sediment 34-X Thames River Yacht club 4.0 Mi, ENE Oysters 35-I Niantic Bay 0.3 Mi, WNW Lobster, Fish 35-X Niantic Bay 0.3 Mi, WNW Bottom Sediment, Seawater, Clams, Fucus

• Key: I - Indicator C - Control X - Extra - sample not required by REMODCM

• • The release points are the MP1 stack for terrestrial locations and the quarry cut for aquatic locations.

2-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Location Direction & Distance Number' Location Name From Release Point** Sample Types 36-1 Black Point 3.0 Mi, WSW Oysters 36-X Black Point 3.0 Mi, WSW Bottom Sediment, Fucus 37-C Giant's Neck 3.5 Mi, WSW Bottom Sediment, Oysters, Seawater 37-X Giant's Neck 3.5 Mi, WSW Lobster 38-I Waterford Shellfish Bed #1 1.0 Mi, NW Clams 39-X Jordon Cove Bar 0.8 Mi, NE Bottom Sediment, Clams, Seawater, Fucus 40-X Quarry Fish, Oysters 41-I Myrock Avenue 3.2 Mi, ENE TLD 42-1 Billow Road 2.4 Mi, WSW TLD 43-I Black Point 2.6 Mi, SW TLD 44-I Onsite - Schoolhouse 0.1 Mi,NNE TLD 45-I Onsite Access Road 0.5 Mi, NNW TLD 46-1 Old Lyme - Hillcrest Ave. 4.6 Mi, WSW TLD 47-1 East Lyme - W. Main St. 4.5 Mi, W TLD 48-I East Lyme - Corey Rd. 3.4 Mi, WNW TLD 49-I East Lyme - Society Rd. 3.6 Mi, NW TLD 50-1 East Lyme - Manwaring Rd. 2.1 Mi, W TLD 51-I East Lyme - Smith Ave. 1.5 Mi, NW TLD 52-I Waterford - River Rd. 1.1 Mi, NNW TLD 53-I Waterford - Gardiners Wood Rd. 1.4 Mi, NNE TLD 55-1 Waterford - Magonk Point 1.8 Mi, ESE TLD 56-I New London - Mott Ave. 3.7 Mi, E TLD 57-I New London - Ocean Ave. 3.6 Mi, ENE TLD 59-I Waterford -Miner Ave. 3.4 Mi, NNE TLD 60-I Waterford - Parkway South 4.0 Mi, N TLD 61-I Waterford - Boston Post Rd. 4.3 Mi, NNW TLD 62-I East Lyme - Coiumbus Ave. 1.9 Mi, WNW TLD 63-I Waterford - Jordon Cove Rd. 0.8 Mi, NE TLD 64-I Waterford - Shore Rd. 1.1 Mi, ENE TLD 65-I Waterford - Bank St. 3.2 Mi, NE TLD 66-X NAP Parking Lot - Fitness Center 0.4 Mi, NW TLD 67-X Golden Spur 4.7 Mi, NNW Bottom Sediment 68-Z Ram Island 9.6 Mi., ESE Oysters 70-C Background Well NA Well Water 71-I Onsite Well Onsite Well Water 72-I Onsite Well Onsite Well Water 73-X Site Switchyard Fence 0.1 Mi, N TLD 74-X Ball Field Foul Pole 0.6 Mi, N TLD 75-X Waterford - Windward Way & 0.5 Mi, NE TLD Shotgun

• Key: I - Indicator C - Control X or Z - Extra - sample not required

• "Therelease points are the MP1 stack for terrestrial locations and the quarry cut for aquatic locations.

2-3

.4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Table 2-2 Sampling Frequency & Tvpe of Analysis Exposure Pathway No. of Sampling & Collection Type of Analysis and/or Sample Location! Frequency

1. Gamma Dose - 40a Quarterly Gamma Dose - Quarterly Environmental TLD

2. Airborne Particulate 8 Continuous sampler - weekly Gross Beta - Weekly filter change Gamma Spectrum - Quarterly on composite (by location), and on individual sample if gross beta is greater than 10 times the mean of the weekly control station's gross beta results

3. Airborne Iodine 8 Continuous sampler - weekly I-131 - Weekly canister change

4. Vegetation 5 One sample near middle and Gamma Isotopic on each sample one near end of growing season

5. Milk 3 Semimonthly when animals are Gamma Isotopic and I-131 on each on pasture; monthly at other sample; Sr-89 and Sr-90 on times. quarterly composite 5a. Pasture Grass 3 Sample as necessary to Gamma Isotopic and I-131 on each substitute for unavailable milk sample

6. Sea Water 2 Continuous sampler with a Gamma Isotopic and Tritium on monthly collection at indicator each sample.

location. Quarterly at control location - Composite of 6 weekly grab samples.

6a. Well Water 3 Quarterly Gamma Isotopic and Tritium on each sample

7. Bottom Sediment 5 Semiannual Gamma Isotopic on each sample 7a. Soil 3 Quarterly Gamma Isotopic on each sample

8. Fin Fish-Flounder 2 Quarterly Gamma Isotopic on each sample and one other type of edible fin fish

9. Mussels 2 Quarterly Gamma Isotopic on each sample (edible portion)

10. Oysters 4 Quarterly Gamma Isotopic on each sample (edible portion)

11. Clams 2 Quarterly Gamma Isotopic on each sample (edible portion)

12. Lobster 2 Quarterly Gamma Isotopic on each sample (edible portion) I I I (a) Two or more TLDs or TLD with two or more elements per location.

2-4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 2.1-1 Millstone Sampling Locations 2-5

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 2.1-2 Millstone Sampling Locations (Within 2 miles)

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Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 2.2. Samples Collected During Report Period The following table summarizes the number of samples of each type collected and analyzed during 2003:

Number of Number of Technical TechnicalNubro Sample Type Specification Specification Number of Required Samples Required Samples Extra Samples Analyzed Analyzed Gamma Exposure 160 160 16 (Environmental TLD)

Air Particulates 416 416 0 Air Iodine 416 416 0 Soil 12 12 0 Goat Milk 57 29' 0 Pasture Grass Variable 2 28 0 Fruit and Vegetables 8 8 0 Broad Leaf Vegetation 6 6 12 Sea Water 16 16 8 Well Water 34 3 0 Bottom Sediment 10 10 14 Aquatic Flora 0 0 16 Fish 16 153 4 Mussels 8 73 0 Oysters 16 16 12 Clams 8 8 8 Lobster 8 8 4 Total All Types 1,157 1,155 94 I Pasture grass sampled as necessary to substitute for unavailable milk. Hay substituted when grass was not available.

2 Depends upon availability of goat milk samples 3 Due to sample unavailability, not all required fish and mussels samples could be obtained 4 REMODCM Rev. 24 was effective September 12,2003. The intent of the new requirement to sample well water was to initiate sampling during the 4th quarter 2003.

2-7

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

3. RADIOCHEMICAL RESULTS 3.1. Summary Table In accordance with the Radiological Effluent Monitoring Manual (REMM),Section I.F. 1, a summary table of the radiochemical results has been prepared and is presented in Table 3-1.

The mean and range recorded are based only upon detectable measurements. The parentheses indicate the fraction the measurements that are considered above the detection limit for each individual analysis.

A more detailed analysis of the data is given in Section 4.0 where a discussion of the variations in the data explains many aspects that are not evident in the Summary Table because of the basic limitation of data summaries. The data summaries include the extra 'X samples collected throughout the year. These samples are taken in an effort to enhance the monitoring program or are the results of special studies.

3-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator Indicator/Control Control Pathway Analysis Locations Location with Hi Bhest Mean Locations Non-Routine Sampled ITotal

• Mean Distance Mean Mean Reported (Units) Type lNo LLD Range Number Direction Range Range Measurements Direct Gamma 170 7.64 (150/150) 08 0.3 ml 11.08 (4/4) 7.45 (20/20) 0 Radiation Dose (4.24-11.37) SE (10.68-11.37) (5.33-9.81)

TLD (uRlhr)

Air lodine 1-131 416 0.07 <LLD N/A N/A < LLD <LLD 0 (pCi/m3)

Air Gross 416 10 19(362/364) 15C 14 ml 20(52/52) 20(52V52) 0 Particulate Beta (4-39) N (5-38) (5-38)

(le-3 pCi'm 3) _

Gamma 32 Be-7 32 88.5 (28/28) 04 1 ml 108 (4/4) 96.3 (4/4) 0 (44-151) N (94-122) (66-124)

Cs-134 32 50 <LLD N/A N/A <LLD <LLD 0 Cs-1 37 32 60 'LLD N/A N/A < LLD <LLD 0 Soil Gamma 12 (pCi/g dry)

K-40 12 10.7 (8/8) 04 1 ml 12.1 (4/4) 11.6 (212) 0 (8.8-13.1) N (10.5-13.1) (9.2-13.3)

Cs-134 12 0.15 <LLD N/A N/A < LLD <LLD 0 Cs-137 12 0.18 0.686 (8/8) 14C 12 ml 1.274 (4/4) 1.274 (4/4) 0 (0.337-1.065) NE (0.981-1.643) (0.981-1.643)

Th-228 12 0.859 (8/8) 14C 12 ml 1.203 (4/4) 1.203 (4/4) 0 (0.46-1.23) NE (0.93-1.31) (0.93-1.31)

Goat Milk Strontium 6 (pCi~iter)

Sr-89 6 <LLD N/A N/A < LLD <LLD 0 Sr-90 6 11.9 (2/4) 22 5.2 ml 11.9 (214) <LLD 0 (9.2-14.5) NNE (9.2-14.5)

Gamma 29 K-40 29 1561 (19/19) 24C 29 ml 1844 (10/10) 1844 (10/10) 0 (1128-2070) NNW (1660-2060) (1660-2060) 1-131 29 1 <LLD N/A N/A <LLD <LLD 0 Cs-134 29 15 < LLD N/A N/A <LLD <LLD 0 3-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50423 Medium or Indicator Indicator/Control Control Pathway Analys Locations Location with Highest Mean Locations Non-Routine Sampled Totai. Mean Distance Mean Mean Reported (Units) Type No LLD Range Number Direction Range Range Measurements Goat Milk Cs-137 29 18 15.6 (9119) 22 5.2 ml 18.2 (6/9) 5.6 (2/10) 0 (p i7iter) (3.9-24.8) NNE (8.5-24.8) (3.9-7.3)

Ba-140 29 70 <LLD N/A N/A <LLD <LLD 0 La-140 29 25 < LLD N/A N/A <LLD <LLD 0 Pasture 28 Grass/Hay Gamma (p0Cg wet)

Be-7 28 2.25 (10/19) 24C 29 ml 4.45 (2/9) 4.45 (2/9) 0 (0.69-4.74) NNW (4.20-4.69) (4.20-4.69)

K-40 28 10.5 (19/19) 21 2.0 ml 11.2 (9/9) 10.6 (9/9) 0 (2.79-22.4) N (4.84-15.2) (4.31-14.1) 1-131 28 0.06 < LLD N/A N/A < LLD <LLD 0 Cs-1 34 28 0.06 < LLD N/A N/A < LLD <LLD 0 Cs-1 37 28 0.08 0.081 (3/19) 22 5.2 ml 0.094 (1110) 0.047 (119) 0 (0.075-0.094) NNE Ba-140 28 <LLD N/A N/A < LLD <LLD 0 La-140 28 <LLD N/A N/A <LLD <LLD 0 Well H-3 3 2000 <LLD N/A N/A <LLD <LLD 0 Water (pCi/liter)

Gamma 3 Mn-54 3 15 <LLD N/A N/A <LLD <LLD 0 Co-58 3 15 <LLD N/A N/A <LLD <LLD 0 Fe-59 3 30 < LLD N/A N/A <LLD <LLD 0 Co-60 3 15 <LLD N/A N/A <LLD <LLD 0 Zn-65 3 30 <LLD N/A N/A <LLD <LLD 0 3-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Envitonmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator IndicatorlControl Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Tota

• Mean Distance Mean Mean Reported (Units) Type No LLD Range Name Direction Range Range Measurements Well Nb-95 3 15 < LLD N/A N/A < LLD < LLD 0 Water (pCiAiter)

Zr-95 3 30 <LLD N/A N/A c LLD < LLD 0 1-131 3 15 < LLD N/A N/A c LLD < LLD 0 Cs-134 3 15 < LLD N/A N/A c LLD < LLD 0 Cs-137 3 18 < LLD N/A N/A < LLD < LLD 0 Ba-140 3 60 <LLD N/A N/A < LLD < LLD 0 La-140 3 15 < LLD N/A N/A < LLD N/A 0 Fruits & Gamma 8 Vegetables (pCi/g wet) K-40 8 1.90 (4/4) 25 N/A 1.90 (4/4) 1.65(414) 0 (0.62-3.31) (0.62-3.31) (0.92-2.39) 1-131 8 0.06** < LLD N/A N/A < LLD < LLD 0 Cs-134 8 0.06 < LLD N/A N/A < LLD < LLD 0 Cs-137 8 0.08 < LLD N/A N/A < LLD < LLD 0 Broad Leaf Gamma 18 Vegetation (pCi/g wet) Be-7 18 0.78 (14118) 1 0.6 mi 1.01 (416) N/A 0 (0.29-2.19) NNW (0.51-2.19)

K-40 18 3.09 (18/18) 1 0.6 ml 3.67 (616) N/A 0 (2.19-5.16) NNW (2.62-5.16) 1-131 18 0.06 < LLD N/A N/A < LLD NIA 0 Cs-134 18 0.06 < LLD N/A N/A < LLD N/A 0 Cs-137 18 0.08 0.056 (2118) 1 0.6 mi 0.71 (1/6) N/A 0 (0.044-0.071) NNW 3-4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator IndicatorlControl Control Pathway Anal yss Locations Location with Highest Mean Locations Non-Routine Sampled Tota

• Mean Distance Mean Mean Reported (Units) Type No LLD Range Name I Direction Range Range Measurements Sea H-3 24 2000 480 (11t20) 32 N/A 480 (11112) <LLD 0 Water (330-870) (330-870)

(pCi/liter)

Gamma 24 Mn-54 24 15 <LLD N/A N/A <LLD <LLD 0 Co-58 24 15 <LLD N/A N/A <LLD <LLD 0 Fe-59 24 30 <LLD N/A N/A <LLD <LLD 0 Co-60 24 15 <LLD N/A NIA <LLD <LLD 0 Zn-65 24 30 <LLD N/A N/A <LLD <LLD 0 Nb-95 24 15 < LLD N/A N/A <LLD <LLD 0 Zr-95 24 30 < LLD N/A N/A cLLD <LLD 0 1-131 24 15*** <LLD N/A N/A <LLD <LLD 0 Cs-134 24 15 < LLD N/A N/A <LLD <LLD 0 Cs-137 24 18 <LLD N/A N/A <LLD <LLD 0 Ba-140 24 60*** <LLD N/A N/A <LLD <LLD 0 La-140 24 15*** < LLD N/A N/A <LLD N/A 0 Bottom Gamma 24 Sediment K-40 24 14.6 (22/22) 37C 3.5 ml 16.5 (212) 16.5 (2/2) 0 (pCMg dry) (11.8-19.0) WSW (13.4-19.7) (13.4-19.7)

Co-60 24 0.022 (1/22) 32 N/A 0.022 (1/22) <LLD 0 Cs-134 24 0.15 <LLD N/A N/A <LLD <LLD 0 Cs-137 24 0.18 0.096 (3122) 67X 4.7 ml 0.118 (212) <LLD 0 (0.054-0.123) NNW (0.112-0.123) 3-5

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator Indicator/Control Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled ITotal

• Mean I Distance I Mean Mean Reported (Units) Type l No LLD Range Name l Direction Range Range Measurements Bottom Th-228 24 0.994 (21122) 31 1.8 ml 3.28 (2V2) 0.433 (212) 0 Sediment (0.13.3.53) NW (3.03-3.53) (0.206-0.66)

Flora Gamma 16 (pCi/g wet)

Be-7 16 0.33 (1/16) 36X 3.0 ml 0.33 (1/4) N/A 0 (0.32-0.33) WSW K-40 16 6.31 (16116) 39X 0.8 ml 7.36 (414) N/A 0 (1.95-11.61) NE (5.83-8.44)

Mn-54 16 <LLD NIA NIA <LLD N/A 0 Co-58 16 < LLD N/A N/A < LLD N/A 0 Fe-59 16 <LLD NIA NIA <LLD N/A 0 Co-60 16 <LLD N/A N/A < LLD N/A 0 Zn-65 16 <LLD N/A N/A < LLD N/A 0 Cs-134 16 <LLD N/A NIA < LLD NIA 0 Cs-137 16 <LLD N/A N/A < LLD N/A 0 Th-228 16 0.079 (4/16) 39X 0.8 ml 0.095 (2116) NIA 0 (0.57-0.113) NE (0.77-0.113)

Fi, _-______

Fish - Gamma 8 Flounder K-40 8 3.17 (8/8) 32 N/A 4.19 (4/4) N/A 0 (pCL/g wet) (2.86-4.35) (4.02-4.35)

Mn-54 8 0.13 <LLD N/A N/A <LLD N/A 0 Co-58 8 0.13 <LLD N/A N/A <LLD NIA 0 Fe-59 8 0.26 <LLD N/A N/A <LLD N/A 0 Co-60 8 0.13 <LLD N/A NIA <LLD N/A 0 Zn-65 8 0.26 < LLD NIA N/A < LLD N/A 0 3-6

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator Indicator/Control Control Pathway Analysis Locations Location with Highest Mean Locations Non-Routine Sampled Total Mean Distance Mean Mean Reported (Units) Type No LLD Range Name Directon Range Range Measurements Fish- Cs-134 8 0.13 < LLD N/A N/A <LLD N/A 0 Flounder (pCi'g wet) Cs-137 8 0.15 < LLD N/A N/A <LLD N/A 0 Fish -Other Gamma 11 (pCi/g wet)

K-40 11 3.02 (11/11) 40X NIA 3.47 (4/4) N/A 0 (2.21-4.00) (2.79-4.00)

Mn-54 11 0.13 <LLD N/A NIA <LLD N/A 0 Co-58 11 0.13 <LLD N/A N/A < LLD N/A 0 Fe-59 11 0.26 <LLD N/A NIA <LLD N/A 0 Co-60 11 0.13 <LLD N/A N/A < LLD N/A 0 Zn-65 I1 0.26 < LLD N/A NIA < LLD N/A 0 Cs-134 11 0.13 <LLD N/A NIA < LLD N/A 0 Cs-137 11 0.15 <LLD N/A NIA < LLD N/A 0 Mussels Gamma 7 (pCi/g wet)

K-40 7 1.46 (717) 30 1.5 ml 1.57 (414) N/A 0 (0.88-2.14) NNW (1.00-2.01)

Mn-54 7 0.13 < LLD N/A N/A <LLD N/A 0 Co-58 7 0.13 < LLD N/A N/A <LLD N/A 0 Fe-59 7 0.26 < LLD N/A NIA <LLD N/A 0 Co-60 7 0.13 < LLD N/A N/A <LLD N/A 0 Zn-65 7 0.26 <LLD N/A N/A 'LLD N/A 0 Cs-134 7 0.13 < LLD N/A N/A < LLD N/A 0 3-7

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator Indicator/Control Control Pathway Analys Locations Location with Highest Mean Locations Non-Routine Sampled Tota - Mean Distance Mean Mean Reported (Units) Type No LLD Range Name Direction Range Range Measurements Mussels Cs-137 7 0.15 < LLD N/A NIA < LLD N/A 0 (pCi'g wet)

Oysters Gamma 24 (pci/g wet)

K-40 24 1.76 (20/20) 32 N/A 1.98 (414) 1.74 (414) 0 (1.24-1.29) (1.31-2.29) (1.32-2.59)

Mn-54 24 0.13 < LLD N/A N/A < LLD < LLD 0 Co-58 24 0.13 < LLD N/A N/A < LLD < LLD 0 Fe-59 24 0.26 < LLD N/A NIA < LLD < LLD 0 Co-60 24 0.13 < LLD N/A N/A < LLD < LLD 0 Zn-65 24 0.26 < LLD N/A N/A < LLD < LLD 0 Ag-110m 24 0.088 (2/20) 32 NIA 0.123 (1/4) < LLD 0 (0.052-0.123)

Cs-134 24 0.13 < LLD N/A N/A < LLD < LLD 0 Cs-137 24 0.15 < LLD N/A N/A < LLD < LLD 0 Clams Gamma 16 (pclg woe)

K-40 16 1.92 (16/16) 38 1.0 ml 2.14 (4/4) N/A (1.45-2.46) NW (1.92-2.43)

Mn-54 16 0.13 < LLD N/A N/A < LLD N/A Co-58 16 0.13 < LLD N/A N/A < LLD N/A Fe-59 16 0.26 < LLD N/A N/A < LLD N/A Co-60 16 0.13 < LLD NIA N/A < LLD N/A Zn-65 16 0.26 < LLD N/A N/A < LLD N/A Cs-134 16 0.13 < LLD N/A N/A < LLD N/A 3-8

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Millstone Power Station, Units 1, 2, & 3 Dockets 50-245, 50-336 & 50-423 Medium or Indicator Indicator/Control Control Pathway Analys Locations Location with Highest Mean Locations Non-Routine Sampled TotaF

• Mean Distance Mean Mean Reported (Units) Type No LLD Range Name l Direction Range Range Measurements Clams Cs-1 37 16 0.15 <LLD N/A N/A <LLD N/A 0 (pCilg wet)

Lobster Gamma 12 (pCi/g wet)

K40 12 2.07 (12/12) 37X 3.5 mi 2.28 (414) N/A 0 (1.44-2.70) WSW (1.65-2.70)

Mn-54 12 0.13 <LLD N/A N/A < LLD N/A 0 Co-58 12 0.13 < LLD N/A N/A <LLD N/A 0 Fe-59 12 0.26 <LLD N/A N/A <LLD N/A 0 Co-60 12 0.13 <LLD N/A N/A <LLD N/A 0 Zn-65 12 0.26 <LLD N/A N/A < LLD N/A 0 Cs-134 12 0.13 <LLD N/A N/A < LLD N/A 0 Cs-137 12 0.15 < LLD N/A N/A < LLD N/A 0 3-9

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station NOTES FOR TABLE 3-1

• For gamma measurements the (Minimum Detectable Level) MDLs -

LLD / 2.33. For all others, MDL = 2 x (the standard deviation of the background). These MDLs are based on the absence of large amounts of interfering activity (excluding naturally occurring radionuclides).

Deviations by about factors of 3 to 4 can occur.

The LLD at a confidence level of 95% is the smallest concentration of radioactive material in a sample that will be detected with a 5%

probability of falsely concluding that a blank observation represents a "real" signal.

For a particular measurement system (which may include radiochemical separation):

LLD = 4.66 Sb E

• V

• 2.22

• Y

• exp (-At) where, LLD is the lower limit of detection as defined above (as pCi per unit mass or volume)

Sb is the standard deviation of the background counting rate or of the counting rate of a blank sample as appropriate (as counts per minute)

E Is the counting efficiency (as counts per transformation)

V Is the sample size (in units of mass or volume) 2.22 is the number of transformations per minute per picoCurie Y is the fractional radiochemical yield (when applicable)

A is the radioactive decay constant for the particular radionuclide At is the elapsed time between sample collection (or end of the sample collection period) and time of counting It should be recognized that LLD is a defined a priori (before the fact) limit representing the capability of a measurement system and not an a posteriori(after the fact) limit for a particular measurement.

Analyses shall be performed in such a manner that the stated LLDs will be achieved under routine conditions. Occasionally background fluctuations, unavoidably small sample sizes, the presence of interfering nuclides, or other uncontrollable circumstances may render these a priori LLDs unachievable. In such cases, the contributing factors will be identified and described in the Annual Radiological Environmental Operating Report. As shown in the equation above, for composite samples taken over a period of time, the LLD is decayed to the end of the sample period.

• • LLD for leafy vegetables.

• LLD from the end of the sample period.

3-10

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 3.2. Data Tables The data reported in this section are strictly counting statistics.

The reported error is two times the standard deviation (2a) of the net activity. Unless otherwise noted, the overall error (counting, sample size, chemistry, errors, etc.) is estimated to be 2 to 5 times that listed. Results are considered positive when the measured value exceeds 1.5 times the listed 2a error (i.e., the measured value exceeds 3a).

Because of counting statistics, negative values, zeros and numbers below the Minimum Detectable Level (MDL) are statistically valid pieces of data. For the purposes of this report, in order to indicate any background biases, all the valid data are presented. This practice is recommended by HASL ("Reporting of Analytical Results from HASL," letter by Leo B. Higginbotham) and NUREG/CR-4007 (Sept. 1984). In instances where zeros are listed after significant digits, this is an artifact of the computer data-handling program.

Data are given according to sample type as indicated below.

1. Gamma Exposure Rate

2. Air Particulates, Gross Beta Radioactivity

3. Air Particulates, Weekly I-131

4. Air Particulates, Quantitative Gamma Spectra

5. Air Particulates, Quarterly Strontium*

6. Soil

7. Milk - Dairy Farms*

8. Milk - Goat Farms

9. Pasture Grass 1O.Well Water 11.Reservoir Water*

12.Fruits & Vegetables 13.Broad Leaf Vegetation 14.Seawater 15.Bottom Sediment 16.Aquatic Flora 17.Fin Fish 18.Mussels 19.Oysters 20.Clams 21.Scallops*

22.Lobster (and Crabs)

• This type of sampling or analysis was not performed, therefore there is no table.

3-11

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 1 QUARTERLY GAMMA EXPOSURE RATE (UR/HR)*

L O C A T I O NS PERIOD 01 02 03 04 05 06 07 08 09 10 11 (4/-) (+/-) (+/-) (+/-) (+/-) (+/-) (+/-) (+/-) (+/-) (+/-) (+/-)

1Q 7.9 0.4 10.2 0.6 7.2 0.5 8.2 0.5 9.5 0.5 8.8 0.6 5.8 0.3 11.1 0.6 8.8 0.6 8.3 0.4 7.0 0.5 2Q 8.2 0.4 9.7 0.3 6.6 0.3 8.0 0.2 9.0 0.2 8.1 0.3 4.7 0.2 11.2 0.5 9.2 0.3 8.0 0.3 6.5 0.3 3Q 8.2 0.3 9.6 0.4 6.7 0.3 8.1 0.3 9.2 0.4 8.3 0.3 4.6 0.2 11.4 0.5 9.0 0.4 7.9 0.4 6.6 0.3 4Q 7.4 0.3 8.6 0.4 6.0 0.3 7.4 0.3 8.6 0.4 7.5 0.4 4.2 0.2 10.7 0.5 8.4 0.3 7.3 0.4 6.4 0.3 PERIOD 12C 13C 14C 15C 16C 27 41 42 43 44 45 1Q 8.0 0.6 8.3 0.4 9.4 0.5 7.0 0.3 6.4 0.3 9.2 0.5 6.6 0.5 7.8 0.4 6.7 0.4 8.8 0.6 7.5 0.4 2Q 7.2 0.3 8.2 0.2 9.8 0.8 7.2 0.4 5.9 0.3 8.7 0.4 6.4 0.3 7.3 0.4 6.5 0.2 8.4 0.4 7.2 0.3 3Q 7.6 0.3 8.1 0.4 9.2 0.3 7.3 0.3 6.1 0.3 8.6 0.4 6.6 0.4 7.7 0.3 6.4 0.3 8.8 0.4 7.1 0.3 4Q 5.9 0.6 7.2 0.3 8.5 0.5 6.5 0.3 5.3 0.2 7.9 0.4 6.3 0.3 7.3 0.3 6.4 0.3 8.1 0.3 6.9 0.4 PERIOD 46 47 48 49 50 51 52 53 55 56 57

(+/ ) (+/ ) (+/ ) (+/ ) (+/ ) (+/ ) (+/ ) (+/ ) (+/ ) ( /) (+/ )

1Q 8.3 0.5 7.7 0.4 9.6 0.6 7.3 0.4 8.0 0.6 6.6 0.3 7.3 0.5 8.1 0.5 7.7 0.6 7.2 0.4 7.5 0.4 2Q 7.6 0.5 7.5 0.2 9.3 0.3 7.0 0.2 7.6 0.2 5.9 0.2 6.8 0.3 7.7 0.3 7.2 0.3 6.4 0.2 7.0 0.2 3Q 7.4 0.3 7.5 0.3 9.8 0.4 7.1 0.3 7.7 0.3 6.2 0.3 6.9 0.3 7.7 0.4 7.5 0.4 6.3 0.3 7.0 0.3 4Q 7.6 0.4 7.2 0.4 9.3 0.4 6.8 0.3 7.4 0.3 6.0 0.3 6.6 0.3 7.3 0.4 7.0 0.3 7.4 0.7 6.8 0.3 PERIOD 59 60 61 62 63 64 65 66X 73X 74X 75X 1Q 8.5 0.4 7.1 0.4 7.5 0.5 8.2 0.4 8.7 0.5 8.0 0.4 7.9 0.5 7.4 0.5 (a) (a) (a) 2Q 8.1 0.3 6.8 0.2 7.2 0.3 7.6 0.3 8.3 0.3 7.3 0.3 7.4 0.3 6.5 0.2 (a) (a) (a) 3Q 8.1 0.4 6.9 0.3 7.1 0.3 7.9 0.3 8.7 0.4 7.4 0.4 7.7 0.5 7.0 0.3 9.2 0.3 7.5 0.3 6.9 0.3 4Q 7.8 0.4 6.5 0.4 7.5 0.5 7.4 0.3 8.7 0.3 6.9 0.3 7.4 0.4 6.4 0.3 8.9 0.5 7.1 0.3 6.5 0.3

• READINGS ARE THE AVERAGE OF MULTI CAS04 PHOSPHOR ELEMENTS WITHIN ONE PANASONIC TLD BADGE ERRORS ARE 1-SIGMA AND INCLUDE COUNTING, TRANSIT, READER AND FADE UNCERTAINITIES (a) THESE LOCATIONS WERE ADDED TO THE MONITORING PROGRAM IN THE 3rd QUARTER.

3-12

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 2 AIR PARTICULATES GROSS BETA RADIOACTIVITY (PCI/M3)

L O C A T I O N S PERIOD ENDING 01 02 03 04 10 11 15C 27

(+00) 0.00) 0.00) (+/0) 0.00) 0.00) (0/0) ( /0)

JAN 07 0.015 0.004 0.017 0.003 0.019 0.003 0.018 0.004 0.015 0.003 0.018 0.004 0.016 0.003 0.016 0.003 JAN 14 0.014 0.005 0.016 0.004 0.015 0.004 0.022 0.005 0.018 0.004 0.020 0.004 0.016 0.004 0.016 0.004 JAN 21 0.024 0.004 0.023 0.003 0.023 0.003 0.026 0.004 0.023 0.003 0.025 0.004 0.022 0.003 0.024 0.003 JAN 28 0.021 0.004 0.023 0.003 0.024 0.003 0.024 0.004 0.020 0.003 0.023 0.004 0.024 0.004 0.022 0.004 FEB 04 0.023 0.004 0.025 0.004 0.025 0.004 0.026 0.004 0.023 0.003 0.028 0.004 0.025 0.004 0.023 0.004 FEB 11 0.019 0.005 0.021 0.004 0.021 0.004 0.026 0.004 0.021 0.003 0.022 0.004 0.024 0.004 0.022 0.004 FEB 18 0.016 0.004 0.017 0.004 0.017 0.004 0.016 0.004 0.018 0.004 0.014 0.004 0.020 0.004 0.016 0.004 FEB 25 0.024 0.005 0.024 0.004 0.021 0.004 0.028 0.005 0.023 0.004 0.023 0.004 0.023 0.004 0.020 0.004 MAR 04 0.028 0.005 0.030 0.004 0.031 0.004 0.033 0.005 0.033 0.004 0.028 0.004 0.035 0.004 0.032 0.004 MAR 11 0.028 0.004 0.032 0.004 0.031 0.004 0.031 0.004 0.031 0.004 0.031 0.004 0.031 0.004 0.026 0.003 MAR 18 0.026 0.005 0.024 0.004 0.023 0.004 0.025 0.004 0.030 0.005 0.025 0.004 0.026 0.004 0.026 0.004 MAR 25 0.014 0.004 0.013 0.003 0.014 0.004 0.014 0.004 0.014 0.004 0.014 0.004 0.016 0.004 0.012 0.004 APR 01 0.007 0.004 0.014 0.003 0.014 0.003 0.014 0.004 0.012 0.003 0.014 0.003 0.012 0.003 0.013 0.003 APR 08 0.019 0.003 0.015 0.003 0.020 0.003 0.018 0.004 0.019 0.003 0.016 0.003 0.019 0.003 0.017 0.003 APR 15 0.021 0.003 0.024 0.004 0.020 0.004 0.024 0.004 0.021 0.004 0.022 0.004 0.021 0.004 0.021 0.004 APR 22 0.026 0.004 0.025 0.004 0.025 0.004 0.027 0.004 0.025 0.004 0.026 0.004 0.024 0.004 0.025 0.004 APR 29 0.013 0.003 0.011 0.003 0.012 0.003 0.014 0.004 0.013 0.004 0.014 0.004 0.014 0.004 0.013 0.003 MAY 06 0.013 0.003 0.015 0.004 0.016 0.004 0.016 0.004 0.015 0.004 0.016 0.004 0.015 0.004 0.018 0.004 MAY 13 0.008 0.003 0.006 0.003 0.007 0.003 0.007 0.003 0.008 0.003 0.007 0.003 0.007 0.003 0.007 0.003 MAY 20 0.011 0.003 0.010 0.003 0.013 0.003 0.012 0.003 0.011 0.003 0.014 0.003 0.013 0.003 0.012 0.003 MAY 27 0.007 0.003 0.008 0.003 0.005 0.003 0.004 0.004 0.005 0.004 0.003 0.003 0.005 0.003 0.008 0.003 JUN 03 0.011 0.003 0.012 0.004 0.009 0.004 0.012 0.004 0.014 0.004 0.011 0.004 0.012 0.004 0.011 0.004 JUN 10 0.012 0.003 0.009 0.003 0.011 0.003 0.011 0.003 0.012 0.003 0.012 0.003 0.012 0.003 0.011 0.003 JUN 17 0.014 0.003 0.011 0.003 0.012 0.004 0.013 0.002 0.015 0.004 0.013 0.004 0.014 0.004 0.009 0.003 JUN 24 0.012 0.003 0.009 0.003 0.011 0.003 0.010 0 *004 0.010 0.004 0.010 0.003 0.013 0.004 0.009 0.004 SAMPLE DATES MAY VARY BY A FEW DAYS 3-13

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 2 AIR PARTICULATES GROSS BETA RADIOACTIVITY (PCI/M3)

L O C A TI O N 8 PERIOD ENDING 01 02 03 04 10 11 lSC 27 (0/0) (0./ ) (00-) (+10) (+/0) (.0-) (+0-) (+10)

JUL 01 0.026 0.004 0.025 0.004 0.026 0.004 0.028 0.004 0.027 0.004 0.027 0.004 0.027 0.004 0.023 0.004 JUL 08 0.027 0.004 0.024 0.004 0.027 0.004 0.027 0.004 0.026 0.005 0.030 0.004 0.024 0.004 0.027 0.005 JUL 15 0.019 0.004 0.019 0.004 0.020 0.004 0.018 0.003 0.020 0.004 0.019 0.004 0.020 0.004 0.020 0.005 JUL 22 0.013 0.003 -0.050 0.031 A 0.018 0.003 0.017 0.004 0.015 0.004 0.020 0.004 0.019 0.004 0.016 0.003 JUL 29 0.022 0.003 0.022 0.004 0.020 0.003 0.019 0.004 0.019 0.004 0.022 0.004 0.029 0.004 0.022 0.004 AUG 05 0.014 0.003 0.012 0.003 0.014 0.003 0.017 0.004 0.016 0.004 0.013 0.004 0.016 0.004 0.017 0.004 AUG 13 0.010 0.003 0.008 0.003 0.009 0.003 0.010 0.003 0.011 0.003 0.008 0.003 0.010 0.003 0.010 0.003 AUG 19 0.023 0.004 0.022 0.004 0.023 0.004 0.021 0.004 0.024 0.005 0.024 0.004 0.022 0.004 0.024 0.005 AUG 26 0.026 0.003 0.025 0.003 0.028 0.004 0.027 0.004 0.035 0.006 0.027 0.003 0.024 0.004 0.028 0.004 SEP 02 0.021 0.004 0.024 0.004 0.025 0.004 0.022 0.004 0.022 0.004 0.023 0.004 0.022 0.004 0.023 0.004 SEP 09 0.014 0.004 0.014 0.004 0.019 0.004 0.015 0.004 0.017 0.004 0.018 0.004 0.018 0.004 0.016 0.004 SEP 16 0.018 0.004 0.017 0.004 0.018 0.004 0.015 0.004 0.016 0.004 0.014 0.003 0.015 0.004 0.017 0.004 SEP 23 0.027 0.004 0.023 0.004 0.025 0.004 0.024 0.004 0.026 0.004 0.026 0.004 0.028 0.004 0.026 0.004 SEP 30 0.027 0.004 0.027 0.004 0.026 0.004 0.028 0.004 0.029 0.004 0.030 0.004 0.028 0.004 0.026 0.004 OCT 07 0.018 0.004 0.014 0.004 0.015 0.004 0.012 0.004 0.017 0.004 0.016 0.004 0.016 0.004 0.017 0.004 OCT 14 0.036 0.004 0.037 0.004 0.038 0.005 0.036 0.004 0.036 0.004 0.038 0.004 0.038 0.005 0.039 0.004 OCT 21 0.017 0.003 0.019 0.003 0.021 0.003 0.018 0.003 0.019 0.003 0.019 0.003 0.021 0.004 0.021 0.003 OCT 28 0.014 0.003 0.016 0.003 0.015 0.003 -0.002 0.006 B 0.018 0.003 0.018 0.003 0.017 0.003 0.017 0.003 NOV 04 0.032 0.004 0.028 0.004 0.031 0.004 0.033 0.004 0.030 0.004 0.031 0.004 0.031 0.005 0.029 0.004 NOV 11 0.017 0.004 0.019 0.004 0.019 0.004 0.020 0.003 0.022 0.004 0.020 0.004 0.023 0.004 0.018 0.004 NOV 18 0.027 0.003 0.029 0.004 0.029 0.004 0.025 0.003 0.024 0.003 0.026 0.003 0.026 0.004 0.027 0.004 NOV 25 0.028 0.004 0.028 0.004 0.025 0.004 0.026 0.004 0.022 0.004 0.022 0.004 0.024 0.004 0.026 0.004 DEC 02 0.023 0.004 0.021 0.004 0.023 0.004 0.025 0.003 0.025 0.004 0.023 0.004 0.024 0.004 0.026 0.004 DEC 09 0.012 0.004 0.017 0.004 0.017 0.004 0.013 0.004 0.015 0.004 0.017 0.004 0.016 0.005 0.014 0.004 DEC 16 0.013 0.004 0.015 0.004 0.013 0.004 0.013 0.003 0.014 0.004 0.011 0.004 0.015 0.004 0.014 0.004 DEC 22 0.023 0.004 0.026 0.004 0.022 0.004 0.023 0.003 0.027 0.004 0.025 0.004 0.020 0.004 0.024 0.004 DEC 29 0.015 0.004 0.017 0.004 0.019 0.004 0.024 0.004 0.022 0.004 0.021 0.004 0.024 0.004 0.021 0.004 SAMPLE DATES MAY VARY BY A FEW DAYS A: VERY LOW VOLUME COLLECTED DUE TO BLOWN FUSE (SHORTLY AFTER LAST FILTER CHANGE)

B: LOW VOLUME COLLECTED DUE TO AIR FLOW BLOCKAGE CAUSED BY INADVERTENTLY LEAVING PLASTIC LEAKAGE TESTING DEVICE ATTACHED TO SAMPLER 3-14

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 3 AIRBORNE IODINE 1-131 (PCI/M3)

L O C A T I O N S PERIOD ENDING 01 02 03 04 10 11 15C 27

( /-) (0/0) (4/-) ('/ ) (0/0) ('I-) ( /-) (4/-)

JAN 07 -0.007 0.013 0.008 0.012 0.005 0.011 -0.002 0.016 -0.004 O0.010 0.000 0.012 0.008 0.012 0.004 0.013 JAN 14 -0.002 0.024 -0.009 0. 019 0.014 0.023 -0.008 0.022 0.007 0.019 -0.012 0.022 0.000 0.023 -0.006 0.025 JAN 21 0.002 0.023 0.010 0.023 -0.014 0.024 -0.004 0.022 -0.012 0.020 -0.006 0.022 0.003 0.021 -0.007 0.024 JAN 28 0.005 0.016 0.003 0.014 -0.005 0.013 0.006 0.018 0.009 0.014 0.004 0.016 0.003 0.018 0.003 0.015 PEB 04 -0.020 0.030 -0.015 0.020 -0.022 0.021 0.019 0.023 0.021 0.016 0.000 0.021 -0.011 0.023 -0.007 0.023 FEB 11 -0.013 0.023 0.009 0.017 0.000 0.016 0.011 0.020 0.007 0.015 -0.001 0.016 -0.003 0.021 -0.009 0.019 PEB 18 -0.002 0.023 0.007 0.030 0.009 0.021 -0.001 0.020 0.008 0.021 -0.009 0.021 -0.005 0.021 0.008 0.023 PEB 25 -0.001 0.025 -0.008 0.022 -0.008 0.024 -0.009 0.026 0.009 0.026 0.004 0.021 -0.018 0.022 0.002 0.028 MAR 04 -0.016 0.022 -0.010 0.014 -0.010 0.014 0.003 0.019 0.008 0.018 0.006 0.018 0.004 0.019 0.013 0.018 MAR 11 -0.006 0.017 0.002 0.014 0.009 0.014 0.004 0.015 -0.002 0.011 0.002 0.015 0.000 0.015 0.000 0.012 MAR 18 -0.001 0.016 0.003 0.014 0.003 0.015 0. 009 0.016 0.009 0.017 0.006 0.014 -0.008 0.014 0.006 0.016 MAR 25 -0.006 0.017 0.000 0.015 0.006 0.013 -0.007 0 .017 0.009 0.015 0.024 0.018 -0.004 0.017 -0.004 0.017 APR 01 0.001 0.027 -0.017 0.024 0.006 0.031 -0.010 0.029 -0.002 0.026 -0.005 0.024 0.004 0.027 0.015 0.025 APR 08 -0.001 0.014 0.020 0.026 -0.001 0.012 0.020 0.016 0.000 0.015 0.004 0.017 -0.001 0.015 -0.007 0.012 APR 15 0.012 0.019 -0.014 0.020 -0.014 0.021 0.003 0.023 0.018 0.024 -0.006 0.021 -0.005 0.023 0.004 0.019 APR 22 0.013 0.015 -0.003 0.016 -0.003 0.015 -0.003 0.017 -0.002 0.018 0.000 0.015 -0.004 0.015 0.003 0.015 APR 29 -0.001 0.014 0.001 0.012 0.007 0.016 0.000 0.017 0.002 0.017 -0.002 0.017 0.014 0.020 0.007 0.016 MAY 06 -0.008 0.012 0.002 0.013 0.008 0.014 0.007 0.017 0.008 0.018 0.011 0.015 -0.007 0.018 -0.007 0.010 MAY 13 0.007 0.016 -0.017 0.016 -0.007 0.017 -0.007 0.017 0.001 0.017 -0.005 0.017 0.004 0.015 -0.005 0.017 MAY 20 0.004 0.013 -0.015 0.013 -0.005 0.012 0.000 0.015 -0.011 0.014 -0.013 0.017 -0.009 0.014 0.015 0.013 MAY 27 0.016 0.019 -0.007 0.021 -0.005 0.022 0.015 0.030 0.001 0.019 -0.019 0.025 -0.017 0.020 0.008 0.023 JUN 03 0.008 0.017 -0.009 0.016 0.008 0.019 -0.001 0.019 0.006 0.021 0.003 0.019 -0.013 0.024 -0.009 0.017 JUN 10 0.010 0.018 -0.005 0.006 0.007 0.016 0.004 0.011 0.002 0.015 0.007 0.016 -0.006 0.020 0.015 0.014 JUN 17 0.000 0.013 0.002 0.016 -0.002 0.020 -0.015 0.021 0.004 0.023 0.014 0.019 0.010 0.018 0.015 0.015 JUN 24 0.000 0.011 -0.006 0.014 -0.010 0.015 0.000 0.016 0. 000 0.014 -0.013 0.015 -0.001 0.015 0.009 0.016 SAMPLE DATES MAY VARY BY A FPW DAYS 3-15

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 3 AIRBORNE IODINE 1-131 (PCI/M3)

L O C A T I O N S PERIOD ENDING 01 02 03 04 10 11 15C 27

(+/ ) (0/-) (0/0) (+/ ) ( /-) (0/0) (0/0) (0/0)

JU. 01 -0.006 0.011 0.010 0.015 -0.005 0.012 -0.005 0.017 -0.012 0.017 0.002 0.014 -0.008 0.016 -0.002 O0.019 JUL 08 -0.002 0.021 -0.005 0.016 -0.010 0.016 0.000 0.021 0.040 0.031 0.003 0.019 0.007 0.016 0.000 0.016 JUL 15 0.006 0.019 -0.003 0.020 -0.005 0.019 0.005 0.021 0.009 0.021 0.005 0.016 0.002 0.019 0.005 0.026 JUL 22 -0.006 0.012 1.100 1.800 A 0.007 0.012 0.007 0.017 0.007 0.016 0.009 0.018 0.008 0.018 -0.004 0.017 JUL 29 0.003 0.012 0.000 0.012 0.001 0.017 -0.009 0.017 -0.017 0.022 -0.002 0.021 -0.009 0.016 0.015 0.016 AUG 05 -0.003 0.023 0.000 0.022 0.009 0.025 -0.013 0.024 -0.007 0.024 0.023 0.029 0.006 0.023 -0.010 0.024 AUG 13 0.005 0.014 -0.004 0.012 -0.005 0.012 0.001 0.016 -0.009 0.015 0.000 0.012 -0.012 0.016 0.005 0.016 AUG 19 -0.003 0.021 -0.003 0.024 -0.005 0.020 0.009 0.023 -0.013 0.029 -0.003 0.024 -0.006 0.023 -0.003 0.028 AUG 26 0.002 0.012 0.009 0.012 0.001 0.014 -0.006 0.015 0.007 0.020 0.001 0.012 -0.011 0.014 0.004 0 .017 SEP 02 0.002 0.021 0.006 0.016 -0.004 0.009 -0.022 0.023 -0.009 0.021 0.015 0.022 -0.002 0.025 0.016 0.024 SEP 09 0.004 0.011 0.000 0.012 0.001 0.012 0.005 0.012 -0.002 0.012 -0.005 0.011 0.000 0.014 0.002 0.011 SEP 16 0.006 0.011 0.005 0.015 0.008 0.015 -0.006 0.018 0.010 0.016 0.001 0.016 -0.009 0.020 -0.018 0.017 SEP 23 0.002 0.015 0.002 0.017 0.009 0.017 0.020 0.021 -0.009 0.020 0.011 0.021 -0.005 0.021 0.007 0.017 SEP 30 0.011 0.026 0.006 0.023 0.014 0.023 0.016 0.022 0.021 0.030 0.009 0.023 0.005 0.030 0.001 0.028 OCT 07 -0.007 0.017 0.015 0.021 -0.004 0.015 -0.007 0.020 -0.005 0.021 -0.007 0.021 0.016 0.024 -0.001 0.021 OCT 14 0.001 0.018 -0.001 0.021 0.007 0.018 0.009 0.019 0.003 0.018 0.002 0.021 0.008 0.021 0.002 0.021 OCT 21 -0.016 0.022 0.018 0.023 0.001 0.020 -0.013 0.022 -0.010 0.019 0.005 0.020 0.001 0.017 0.005 0.016 OCT 28 0.012 0.019 -0.010 0.022 -0.009 0.024 0.003 0.030 B 0.002 0.019 0.005 0.029 -0.013 0.022 0.007 0.024 NOV 04 0.007 0.018 -0.015 0.017 0.002 0.014 0.003 0.014 0.009 0.017 -0.002 0.015 -0.002 0.019 0.006 0.012 NOV 11 -0.003 0.018 -0.007 0.020 -0.002 0.016 0.002 0.018 -0.008 0.019 0.001 0.020 0.005 0.025 -0.019 0.020 NOV 18 -0.020 0.021 0.003 0.017 -0.003 0.017 -0.013 0.017 0.002 0.019 -0.014 0.017 0.011 0.020 0.003 0.015 NOV 25 -0.003 0.013 0.005 0.015 0.000 0.013 0.001 0.011 -0.007 0.015 0.001 0.015 -0.002 0.015 -0.003 0.016 DEC 02 0.002 0.022 -0.008 0.021 -0.015 0.020 -0.005 0.019 0.002 0.017 0.007 0.017 0.013 0.020 0.002 0.019 DEC 09 -0.027 0.020 -0.002 0.015 0.013 0.025 -0.013 0.020 0.020 0.019 -0.008 0.021 -0.015 0.022 -0.015 0.022 DEC 16 0.005 0.014 -0.004 0.018 0.023 0.018 -0.005 0.016 0.014 0.016 -0.016 0.020 -0.006 0.021 0.015 0.022 DEC 22 0.002 0.015 -0.003 0.018 0.008 0.018 0.001 0.015 -0.001 0.014 -0.002 0.007 0.008 0.018 -0.015 0.018 DEC 29 0.006 0.019 -0.002 0.014 -0.005 0.018 -0.003 0.015 0.003 0.016 -0.005 0.015 0.009 0.015 -0.002 0.022 SAMPLE DATES MAY VARY BY A FEW DAYS A: VERY LOW VOLUME COLLECTED DUE TO BLOWN FUSE (SHORTLY AFTER LAST FILTER CHANGE)

B: LOW VOLUME COLLECTED DME TO AIR FLOW BLOCKAGE CAUSED BY INADVERTENTLY LEAVING PLASTIC LEAKAGE TESTING DEVICE ATTACHED TO SAMPLER 3-16

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 4A AIR PARTICULATES GAMMA SPECTRA - QTR .

(PCI/M3)

A N A L Y S E S LOCATION BE-7 CO-60 ZR-95 NB-95 RU-103

(+/-) (+/-) (+/ ) (+/ ) (+1-)

01 0.080 0.021 -0.0003 0.0007 -0.0006 0.0019 -0.0010 0.0019 -0. 0003 0.0017 02 0.067 0.023 -0.0003 0.0009 0.0000 0.0029 -0.0033 0.0033 -0.0010 0.0023 03 0.080 0.023 -0.0003 0.0006 -0.0006 0.0015 -0.0003 0.0024 0.0012 0.0017 04 0.094 0.027 -0.0003 0.0006 0.0021 0.0025 -0.0006 0.0028 -0.0007 0.0021 10 0.074 0.020 0.0002 0. 0007 -0.0012 0.0016 0.0006 0.0023 -0.0003 0.0015 11 0.055 0.026 -0.0002 0.0010 0.0006 0.0030 0.0030 0.0057 -0.0006 0.0030 15C 0.066 0.023 0.0003 0.0005 0.0003 0.0021 -0.0013 0.0038 0.0000 0.0019 27 0.044 0.021 0.0000 0.0004 0.0011 0.0023 -0.0006 0.0026 0.0008 0.0019 LOCATION RU-106 CS-134 CS-137 BA-140 C0-141 (0/0) (+/ ) (e/ ) (+/-)

01 0.002 0.004 0.0000 0.0005 0.0000 0.0005 0.005 0.037 0. 0000 0.0026 02 -0.003 0.007 -0.0002 0.0008 -0.0003 0.0007 -0.045 0.041 0.0017 0.0034 03 0.004 0.005 -0.0002 0.0006 -0.0002 0.0006 0.000 0.019 0.0007 0.0023 04 -0.003 0.007 -0.0004 0. 0006 0.0003 0.0007 0.015 0.021 0.0009 0.0028 10 0.002 0.005 -0.0003 0.0005 -0. 0003 0.0004 0.000 0.019 -0.0021 0.0024 11 0.009 0.007 -0.0004 0.0008 0.0002 0.0007 -0.005 0.054 0.0036 0.0040 15C 0.002 0.005 0.0007 0.0007 -0. 0009 0.0006 -0.007 0.041 -0.0009 0.0028 27 -0.001 0.005 -0. 0001 0.0005 -0.0003 0 . 0009 0.007 0.024 -0. 0001 0.0024 3-17

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 4B AIR PARTICULATES GAMMA SPECTRA - QTR 2 (PCI/M3)

A N A L Y S X S LOCATION BE-7 co-60 ZR-95 NB-95 RU-103

(+1-) (+1-) (+/ ) (+1-)

01 0.064 0.053 0.0180 0.0026 -0. 0005 0.0056 0.0016 0.0070 0.0030 0.0053 02 0.072 0.037 0.0004 0.0018 0.0011 0.0041 -0.0240 0.0033 -0.0010 0.0042 03 0.116 0.050 -0.0006 0.0013 -0.0007 0.0060 -0.0029 0.0063 0.0025 0.0042 04 0.122 0.052 0.0005 0.0019 -0.0047 0.0052 -0.0052 0.0072 -0.0012 0.0049 10 0.075 0.036 0.0017 0.0021 -0. 0015 0.0063 -0.0012 0.0060 0.0000 0.0042 11 0.110 0.051 0.0008 0.0017 -0.0049 0.0071 -0.0068 0.0073 -0.0027 0.0050 15C 0.107 0.045 -0.0019 0.0020 -0.0037 0.0055 -0.0021 0.0063 -0.0027 0.0039 27 0.108 0.046 0.0009 0.0024 0.0012 0.0043 0.0030 0.0065 0.0010 0.0039 LOCATION RU-106 CS-134 CS-137 BA-140 CE-141

( - -/-) (+1-) (00/-) ( ,,-) ('I-)

01 -0.007 0.016 -0.0008 0.0016 0.0001 0.0026 0.016 0.087 0.0026 0.0080 02 -0.003 0.011 -0.0001 0.0016 -0. 0009 0.0022 -0.027 0.054 0.0005 0.0061 03 0.003 0.012 -0.0008 0.0014 -0.0005 0.0024 0.028 0.055 0.0015 0.0070 04 -0.005 0.014 0.0000 0.0018 -0.0004 0.0027 -0.031 0.063 0.0096 0.0067 10 -0.003 0.010 -0.0015 0.0014 -0.0009 0.0026 0.013 0.060 0.0057 0.0060 11 0.002 0.013 -0.0008 0.0018 -0.0014 0.0024 0.015 0.067 0.0019 0.0071 15C 0.007 0.013 -0.0018 0.0014 -0.0005 0.0021 -0.029 0.071 0.0014 0.0069 27 -0.002 0.012 -0.0013 0.0016 0.0009 0. 0024 0.014 0.050 0.0008 0.0068 3-18

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 4C AIR PARTICULATES GAMMA SPECTRA - QTR 3 (PCI/m3)

A N A L Y S E S LOCATION BE-7 CO-60 ZR-95 NB-95 RU-103

(+/-) (0/0) (4/-) (./ )

0l 0.079 0.040 -0.0007 0 .0010 -0. 0013 0.0038 0.0037 0.0060 -0.0005 0.0032 02 0.047 0.043 0.0013 0.0011 0.0022 0.0038 0.0006 0.0050 -0.0010 0.0043 03 0.071 0.036 -0.0006 0.0014 0.0015 0. 0032 0.0011 0.0039 0.0000 0.0043 04 0.111 0.046 0.0000 0.0008 -0.0052 0.0048 0.0031 0.0052 0.0012 0.0048 10 0.050 0.048 -0. 0001 0.0011 -0.0010 0.0039 0.0000 0.0064 -0.0012 0.0047 11 0.086 0.042 0.0007 0.0011 0.0010 0.0036 0.0015 0.0057 0.0028 0.0050 15C 0.124 0.047 -0.0003 0.0009 0. 0004 0.0042 0.0048 0.0062 -0.0028 0.0040 27 0.065 0.035 0.0002 0.0011 -0.0027 0.0046 -0.0029 0.0035 0.0027 0.0048 LOCATION RU-106 CS-134 CS-137 BA-140 CE-141

(./ ) (+/ ) (0/0) 01 -0.008 0.010 -0.0003 0.0006 -0.0004 0.0009 0.000 0.048 0.0007 0.0074 02 0.003 0.011 0.0001 0.0012 0.0000 0.0011 -0.053 0.079 -0.0023 0. 0079 03 0.000 0.010 -0.0004 0.0010 -0.0003 0.0011 0.019 0.065 0.0037 0.0066 04 -0.006 0.011 -0.0001 0.0012 0. 0001 0.0009 0.000 0.060 -0.0033 0.0082 10 0.001 0.009 0.0005 0.0012 0.0002 0.0010 -0.040 0.100 -0.0032 0.0081 11 0.006 0.013 -0.0008 0.0009 -0.0003 0.0011 -0.039 0.055 -0.0061 0.0079 15C 0.002 0.009 0.0001 0.0011 0. 0002 0.0012 0.060 0.100 -0.0086 0.0084 27 0.000 0.011 -0.0002 0.0011 0. 0005 0.0010 0.057 0.066 -0.0122 0.0069 3-19

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Rcport 2003 Millstone Station TABLE 4D AIR PARTICULATES GAMMA SPECTRA - QTR 4 (PCI/M3)

A N A L Y S E S LOCATION cO-60 ZR-95 NB-95 RU-103

(+1) 0+1-) (+1) (e,-) (/)

01 0.134 0.043 -0.0002 0.0013 0.0001 0.0047 -0.0027 0.0043 -0.0021 0.0029 02 0.073 0.039 0.0010 0.0019 -0.0003 0.0039 0.0019 0.0050 0.0016 0.0038 03 0.134 0.042 -0 .0009 0.0018 0.0009 0.0041 -0.0004 0.0042 -0.0008 0. 0034 04 0.104 0.043 0 .0000 0.0024 -0.0011 0.0042 -0.0024 0.0047 -0.0020 0.0033 10 0.151 0.045 0.0000 0.0021 0.0023 0.0052 0.0010 0.0037 0.0013 0.0028 11 0.115 0.045 0.0004 0.0014 -0. 0009 0.0036 0.0001 0.0045 -0.0004 0.0033 15C 0.088 0.042 0.0000 0.0021 -0.0034 0.0054 0.0001 0.0051 -0.0013 0.0035 27 0.096 0.045 -0.0013 0.0021 -0.0019 0.0049 -0.0001 0.0056 0.0012 0.0034 LOCATION RU-106 CS-134 CS-137 BA-140 CE-141 0.3-) 0.00-) C.,-) (4/-)

01 0.005 0.013 -0.0007 0.0019 0.0004 0.0025 -0.009 0.022 -0.0016 0.0047 02 0.002 0.014 0.0004 0.0012 -0. 0008 0.0030 0.005 0.017 -0.0031 0.0051 03 0.010 0.013 0.0006 0.0010 0.0006 0.0028 0.000 0.013 -0.0014 0.0045 04 -0.004 0.012 -0. 0010 0.0021 -0.0018 0.0029 -0.015 0.017 -0.0022 0.0053 10 0.000 0.013 -0.0031 0.0023 0.0009 0.0032 -0.010 0.021 0.0000 0.0054 11 0.007 0.011 0.0006 0.0014 0.0000 0.0025 0.010 0.020 0.0015 0.0050 15C 0.007 0.014 -0.0007 0.0017 -0.0011 0.0028 -0.026 0.023 -0. 0001 0.0049 27 0.005 0.016 -0.0004 0. 0015 -0.0016 0.0026 -0.005 0.023 0.0002 0.0042 3-20

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 6 SOIL (PCI/G DRY WT.)

COLLECTION LOCATION DATE BZ-7 K-40 CR-51 MN-54 co-se FE-59 CO-60

( /-) ( /-)

03 03/24/03 0.28 0.32 9.02 0.90 0.15 0.33 0.009 0.026 -0.008 0.026 -0.013 0.062 -0.021 0.024 05/19/03 0.01 0.28 10.25 0.99 0.03 0.30 -0.011 0.028 -0.014 0.027 -0.004 0.050 0.028 0.032 09/09/03 0.11 0.39 8.80 1.30 -0.02 0.40 -0.017 0.032 0.002 0.031 -0.016 0.086 0.045 0.041 11/24/03 0.53 0.63 9.50 1.60 1.03 0.87 -0.013 0.041 0.000 0.055 -0.040 0.160 0.012 0.050 04 03/24/03 -0.09 0.35 12.70 1.20 -0.18 0.41 -0.030 0.033 -0.021 0.037 -0.022 0.086 0.014 0.038 05/19/04 0.27 0.29 13.10 1.20 -0.15 0.31 -0.007 0.030 -0.013 0.032 0.026 0.077 0.006 0.034 09/09/03 0.06 0.41 10.50 1.60 -0.16 0.55 -0.006 0.056 0.006 0.038 0.020 0.110 0.014 0.044 11/24/03 0.10 0.44 12.00 1.10 -0.24 0.60 0.041 0.034 -0.023 0.037 0.000 0.100 -0.006 0.028 14C 03/24/03 0.15 0.27 9.20 0.91 -0.38 0.33 0.022 0.031 0.015 0.026 -0.047 0.060 0.016 0.026 05/19/04 -0.20 0.27 12.63 0.84 -0.20 0.32 0.001 0.024 0.002 0.024 0 .010 0.050 -0.001 0.023 09/09/03 0.34 0.45 11.40 1.50 -0.04 0.50 -0.026 0.041 0.001 0.040 0.018 0.098 -0.006 0.046 11/24/03 0.23 0.72 13.30 1.70 -0.20 1.10 -0.028 0.048 0.035 0.060 -0.080 0.150 -0.066 0.054 COLLECTION LOCATION DATE ZN-65 ZR-95 NB-95 RU-103 RU-106 CS-134 CS-137

-0.040 0.032 03 03/24/03 0.03 0.10 0.047 0.048 0.000 0.033 -0.040 0.032 -0.11 0.20 0.022 0.026 0.913 0.080 05/19/03 0.03 0.11 0.020 0.048 -0.014 0.033 -0.050 0.031 0.13 0.24 0.014 0.031 1.065 0.089 09/09/03 -0.11 0.11 -0.10 0.11 -0.009 0.045 -0.017 0.044 -0.02 0.39 -0.013 0.061 0.960 0.110 11/24/03 0.03 0.20 0.10 0.11 -0.043 0.082 0.016 0.083 0.08 0.46 0.003 0.054 0.970 0.130 04 03/24/03 0.13 0.18 0.08 0.14 -0.035 0.080 -0.004 0.041 -0.02 0.34 -0.019 0.035 0.432 0.078 05/19/04 0.01 0.07 -0.14 0.87 -0.028 0.039 0.012 0.031 0.04 0.32 0.021 0.030 0.437 0.070 09/09/03 -0.20 0.12 -0.18 0.16 0.005 0.069 0.026 0.055 0.00 0.36 -0.021 0.050 0.337 0.099 11/24/03 -0.07 0.14 -0.17 0.15 0.034 0.066 -0.006 0.055 -0.14 0.32 -0.012 0.031 0.373 0.065 14C 03/24/03 0.01 0.13 0.008 0.050 -0.018 0.057 -0.010 0.033 -0.08 0.25 0.006 0.038 0.981 0.084 05/19/04 -0.07 0.11 -0.055 0.082 -0.012 0.048 -0.004 0.028 -0.06 0.23 0.005 0.021 1.643 0.084 09/09/03 -0.30 0.23 -0.06 0.19 0.024 0.054 -0.009 0.054 -0.06 0.48 0.041 0.048 1.100 0.130 11/24/03 0.02 0.25 0.02 0.25 -0.120 0.110 0.040 0.100 -0.10 0.49 -0.026 0.047 1.370 0.160 3-21

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 6 SOIL (PCI/G DRY WT.)

COLLECTION LOCATION DATE CE-141 CE-144 SB-125 TH-228 (4/-) (+1-) (40/-) (4f/-)

03 03/24/03 0.059 0.058 -0.15 0.17 0.039 0.074 0.46 0.11 05/19/03 0.001 0.047 0.03 0.16 0.093 0.078 0.67 0.13 09/09/03 -0.044 0.063 -0.02 0.21 0.130 0.110 0.61 0.20 11/24/03 0.020 0.120 -0.28 0.26 -0.030 0.120 0.63 0.21 04 03/24/03 -0.038 0.065 -0.03 0.22 -0.030 0.100 1.14 0.16 05/19/04 0.020 0.050 -0.02 0.19 0.043 0.087 1.08 0.14 09/09/03 0.025 0.084 -0.06 0.29 -0.020 0.130 1.23 0.22 11/24/03 -0.020 0.110 0.12 0.21 -0.004 0.085 1.05 0.15 14C 03/24/03 0.017 0.057 0.06 0.40 -0.053 0.084 0.93 0.13 05/19/04 0.036 0.052 -0.31 0.20 0.051 0.082 1.29 0.11 09/09/03 0.068 0.089 -0.15 0.30 0.040 0.140 1.31 0.22 11/24/03 -0.070 0.160 0.06 0.36 -0.040 0.150 1.28 0.25 3-22

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 8 GOAT MILK (PCI/L)

COLLECTION LOCATION DATE K-40 SR-89 SR-90 I-131 CS-134 CS-137 BA-140 LA-140 (4/-) (4/-) (4/-)

21 05/06/03 1685 94 -0.01 0.21 1.6 2.5 7.0 3.4 0.0 3.0 0.0 3.5 05/21/03 1650 120 0.17 0.34 -0.7 3.2 5.7 4.0 4.0 4.6 4.5 5.3 06/10/03 1930 100 0.03 0.21 -0.5 2.6 1.5 2.3 -3.9 3.1 -4.5 3.6 06/24/03 1610 180 3.1 5.7 0.00 0.98 -0.02 0.22 2.7 5.3 2.1 4.9 2.3 6.9 2.6 7.9 07/08/03 1690 120 -0.10 0.04 0.5 3.3 3.7 3.2 -1.7 4.0 -1.9 4.6 07/22/03 1321 86 0.46 0.50 1.3 2.5 2.7 2.4 -0.4 3.1 -0.5 3.6 08/06/03 1420 110 0.45 0.48 2.7 3.2 3.4 4.0 -2.6 3.5 -3.0 4.1 08/19/03 1730 65 0.45 0.55 1.7 1.8 3.9 2.0 -0.1 3.5 -0.2 4.0 09/10/03 2070 140 0.00 0.11 -1.2 3.8 4.6 4.4 -0.4 5.7 -0.4 6.5 09/23/03 1470 150 3.4 5.5 0.6 1.1 -0.10 0.04 3.3 4.0 11.4 5.8 -2.8 5.6 -3.2 6.4 22 04/23/03 1700 140 -0.04 0.16 -1.6 3.2 0.9 3.8 -0.5 4.8 -0.6 5.5 05/06/03 1536 88 0.22 0.30 0.3 2.3 5.1 3.6 -4.3 3.4 -5.0 3.9 05/21/03 1540 150 0.11 0.33 1.7 3.9 8.5 5.0 2.4 6.0 2.7 6.9 06/10/03 1351 87 -0.08 0.03 -1.2 2.5 14.0 3.5 0.4 3.3 0.4 3.8 06/24/03 1410 160 -8.2 5.7 9.2 1.2 0.14 0.35 0.9 4.2 1.1 4.2 0.7 5.5 0.8 6.3 07/08/03 1770 110 0.07 0.15 0.1 2.8 21.7 4.4 1.0 3.7 1.1 4.2 07/22/03 1530 110 0.09 0.28 -0.2 3.3 24.8 5.1 -0.6 4.5 -0.7 5.2 08/07/03 1128 89 0.03 0.18 1.3 2.8 20.3 4.4 3.8 4.2 4.3 4.9 08/19/03 1213 86 6 12 14.5 1.8 0.09 0.04 1.8 2.5 19.8 3.8 0.5 4.9 0.6 5.6 24C 05/22/03 1710 150 -0.08 0.03 1.5 3.6 5.5 3.9 3.6 6.2 -4.1 7.1 06/11/03 1790 120 0.03 0.20 -1.7 3.3 7.3 4.1 -4.4 4.4 -5.1 5.1 06/25/03 1700 190 -7.9 5.0 -1.5 1.1 0.12 0.25 1.1 4.9 -2.5 4.7 2.2 6.8 2.5 7.8 07/08/03 1660 100 0.05 0.23 1.1 2.6 3.2 3.1 -2.6 3.5 -3.0 4.1 07/22/03 1752 96 -0.04 0.02 1.7 2.5 3.6 2.8 2.6 3.4 2.9 3.9 08/05/03 1840 120 0.36 0.45 1.0 3.0 2.7 3.3 -3.7 4.7 -4.3 5.4 08/19/03 1966 67 0.03 0.28 -0.1 1.7 3.9 1.9 -0.2 3.3 -0.2 3.8 09/09/03 2060 120 0.08 0.17 0.6 3.0 5.2 3.9 0.3 5.6 0.4 6.4 09/23/03 1900 180 2.2 5.3 1.4 1.1 0.03 0.24 -0.3 4.6 -2.6 4.4 -3.3 5.2 -3.8 5.9 10/09/03 2060 110 -0.20 0.07 0.6 2.9 2.2 2.6 -1.2 5.2 -1.4 6.0 PASTURE GRASS, RAY OR FEED WAS SAMPLED AS A SUBSTITUTE FOR UNAVAILABLE GOAT MILK STRONTIUM ANALYSES ARE COMPOSITES OF ALL MILK SAMPLED FROM A GIVEN LOCATION DURING THE QUARTER 3-23

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 9 PASTURE GRASS / HAY (PCI/G WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 CO-58 FE-59 CO-60

(+/ ) (4/-) (+/-) (+/-) (4/-) (4/-)

21 01/14/03 A 0.31 0.26 14.10 1.00 -0.19 0.25 -0.005 0.027 0.005 0.029 -0.060 0.069 -0.015 0.039 02/21/03 A 0.24 0.26 15.20 1.00 -0.06 0.21 -0.010 0.030 -0.005 0.028 -0.008 0.073 -0.009 0.034 03/12/03 A 0.05 0.18 15.10 0.80 -0.03 0.02 0.015 0.024 -0.024 0.024 0.006 0.051 0.023 0.027 04/09/03 A 0.25 0.24 14.43 0.89 -0.05 0.21 0.001 0.025 -0.009 0.025 0.008 0.061 -0.006 0.028 04/23/03 A -0.21 0.24 10.79 0.92 0.14 0.26 -0.008 0.030 0.017 0.032 -0.058 0.080 -0.009 0.034 10/09/03 1.12 0.26 5.35 0.65 0.03 0.14 0.005 0.012 0.010 0.019 -0.014 0.056 0.001 0.018 10/31/03 2.36 0.55 4.84 0.95 0.03 0.30 0.020 0.023 -0.005 0.031 -0.010 0.110 -0.022 0.038 11/21/03 A 1.21 0.36 9.36 0.77 -0.05 0.24 -0.004 0.026 -0.010 0.026 -0.046 0.070 -0.006 0.030 12/16/03 A 1.08 0.41 11.97 0.84 0.08 0.39 0.015 0.027 -0.018 0.034 0.000 0.110 0.012 0.029 22 01/14/03 A 0.09 0.22 14.40 0.94 0.02 0.26 -0.016 0.027 -0.017 0.028 0.041 0.065 -0.011 0.032 02/21/03 A 0.18 0.22 13.69 0.90 0.13 0.27 -0.007 0.029 0.002 0.029 0.051 0.070 -0.014 0.030 03/12/03 A 0.16 0.17 22.40 1.10 0.02 0.17 -0.011 0.024 0.016 0.025 -0.060 0.059 -0.007 0.031 04/09/03 A 0.02 0.22 22.12 0.94 -0.05 0.27 0.010 0.025 -0.025 0.028 -0.031 0.063 -0.016 0.028 09/10/03 1.79 0.39 2.79 0.69 0.02 0.17 0.012 0.019 0.009 0.024 -0.008 0.077 -0.017 0.024 09/24/03 2.86 0.51 3.19 0.80 0.01 0.24 0.008 0.023 -0.025 0.026 -0.100 0.110 -0.003 0.030 10/09/03 3.05 0.41 4.01 0.71 0.06 0.18 0.010 0.024 0.003 0.019 -0.036 0.074 -0.016 0.020 10/31/03 3.56 0.70 3.60 0.99 0.04 0.32 -0.007 0.025 -0.023 0.029 0.036 0.079 0.011 0.024 11/21/03 4.74 0.59 3.59 0.83 0.16 0.19 -0.002 0.024 0.009 0.028 -0.042 0.088 0.017 0.026 12/16/03 A 0.69 0.46 7.15 0.87 0.18 0.43 -0.026 0.032 -0.027 0.039 -0.050 0.120 -0.022 0.034 24C 01/14/03 A 0.30 0.30 11.52 0.82 0.13 0.29 0.011 0.025 0.005 0.030 -0.016 0.069 -0.003 0.030 02/21/03 A 0.37 0.30 14.14 0.88 -0.03 0.29 0.004 0.026 -0.006 0.028 0.001 0.072 0.023 0.029 03/12/03 A 0.13 0.18 10.87 0.72 -0.17 0.20 0.003 0.023 -0.003 0.021 -0.035 0.055 0.027 0.026 04/09/03 A 0.25 0.20 12.76 0.74 -0.20 0.25 -0.019 0.024 -0.012 0.025 -0.003 0.059 0.002 0.026 04/23/03 A -0.02 0.10 13.91 0.82 -0.05 0.30 -0.001 0.027 0.019 0.029 -0.043 0.072 -0.016 0.029 05/07/03 0.21 0.20 4.31 0.79 -0.02 0.16 0.011 0.017 -0.015 0.024 0.014 0.056 0.008 0.024 10/31/03 4.69 0.72 4.96 0.99 0.15 0.24 -0.009 0.022 0.015 0.027 0.022 0.097 0.026 0.021 11/21/03 A 4.20 0.35 9.25 0.74 0.05 0.16 -0.017 0.022 -0.009 0.023 0.020 0.075 -0.005 0.025 12/16/03 A 0.46 0.36 13.80 0.90 -0.03 0.36 -0.012 0.029 -0.008 0.032 0.060 0.100 0.011 0.029 A : HAY 3-24

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 9 PASTURE GRASS / RAY (PCI/G WET WT.)

COLLECTION LOCATION DATE ZN-65 ZR-95 NB-95 RU-103 RU-106 1-131 CS-134

(+1 -) (+/-) (+1-) (+/ )

21 01/14/03 A 0.007 0.066 0.037 0.051 -0.002 0.034 0.002 0.030 0.07 0.25 0.009 0.013 -0.002 0.028 02/21/03 A 0.009 0.094 -0.027 0.051 -0.025 0.037 -0.014 0.027 0.01 0.21 0.007 0.064 0.007 0.030 03/12/03 A -0.087 0.059 -0.039 0.044 -0.080 0.032 -0.015 0.026 0.15 0.22 0.006 0.042 0.029 0.026 04/09/03 A 0.002 0.062 -0.001 0.049 0.019 0.033 -0.009 0.025 -0.01 0.20 -0.034 0.069 0.008 0.027 04/23/03 A 0.000 0.070 0.006 0.058 -0.020 0.056 0.016 0.033 -0.29 0.24 -0.020 0.110 0.013 0.031 10/09/03 -0.012 0.040 -0.001 0.027 -0.005 0.022 0.007 0.016 0.00 0.13 0.010 0.018 -0.013 0.016 10/31/03 0.050 0.130 -0.013 0.049 -0.028 0.049 0.006 0.028 -0.04 0.21 0.000 0.013 0.005 0.028 11/21/03 A 0.020 0.093 0.022 0.048 0.006 0.033 0.011 0.028 -0.24 0.25 0.046 0.059 0.008 0.027 12/16/03 A 0.180 0.120 0.050 0.060 0.032 0.046 -0.005 0.041 -0.20 0.27 -0.030 0.300 -0.028 0.028 22 01/14/03 A -0.010 0.120 -0.001 0.043 -0.015 0.033 0.027 0.028 -0.03 0.23 0.007 0.013 0.010 0.027 02/21/03 A -0.060 0.100 -0.002 0.055 0.020 0.040 0.022 0.033 0.09 0.25 0.009 0.081 -0.011 0.033 03/12/03 A 0.034 0.062 0.011 0.044 -0.003 0.029 -0.024 0.022 0.05 0.19 0.007 0.045 0.000 0.027 04/09/03 A -0.064 0.097 0.011 0.048 -0.014 0.041 -0.007 0.031 0.02 0.23 0.010 0.110 0.018 0.026 09/10/03 -0.060 0.056 -0.011 0.038 0.024 0.027 0.000 0.022 -0.02 0.20 -0.004 0.001 -0.001 0.031 09/24/03 -0.022 0.052 -0.009 0.055 -0.015 0.038 -0.014 0.030 0.04 0.18 0.004 0.023 0.000 0.023 10/09/03 -0.005 0.048 0.021 0.034 -0.008 0.027 0.007 0.014 0.18 0.14 0.022 0.031 0.018 0.018 10/31/03 -0.010 0.093 0.012 0.047 -0.011 0.040 -0.008 0.029 -0.03 0.24 0.007 0.017 0.015 0.024 11/21/03 -0.013 0.062 0.001 0.044 0.000 0.031 -0.022 0.025 0.09 0.20 0.012 0.024 0.000 0.029 12/16/03 A 0.040 0.130 -0.009 0.065 0.000 0.072 -0.004 0.044 -0.16 0.28 0.100 0.270 0.013 0.034 24C 01/14/03 A 0.060 0.130 0.009 0.047 -0.026 0.036 -0.011 0.029 -0.04 0.26 0.000 0.008 -0.011 0.028 02/21/03 A -0.057 0.069 -0.003 0.051 0.050 0.037 -0.038 0.032 -0.25 0.25 -0.050 0.110 -0.012 0.031 03/12/03 A -0.037 0.059 -0.011 0.042 0.009 0.032 -0.035 0.025 -0.11 0.22 0.018 0.044 -0.006 0.029 04/09/03 A -0.035 0.085 0.021 0.046 0.037 0.030 -0.012 0.028 -0.02 0.23 -0.038 0.082 -0.006 0.027 04/23/03 A -0.020 0.100 -0.037 0.055 -0.036 0.042 0.008 0.033 -0.30 0.25 -0.030 0.130 0.015 0.028 05/07/03 0.000 0.036 0.005 0.033 0.003 0.027 -0.007 0.022 0.07 0.12 0.080 0.130 0.007 0.018 10/31/03 0.000 0.058 -0.020 0.050 0.004 0.037 -0.003 0.032 -0.07 0.19 0.026 0.030 0.016 0.028 11/21/03 A 0.060 0.100 -0.010 0.041 -0.011 0.026 -0.021 0.021 0.04 0.17 -0.005 0.041 -0.013 0.026 12/16/03 A 0.140 0.130 0.009 0.055 0.003 0.036 -0.042 0.039 0.01 0.25 -0.020 0.250 0.002 0.029 As HAY 3-25

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 9 PASTURE GRASS / RAY (PCI/O WET WT.)

COLLECTION LOCATION DATE cS-137 BA-140 LA-140 CE-141 CE-144 SB-125 TH-228

(+/ )

21 01/14/03 A 0.027 0.027 0.043 0.067 0.050 0.077 0.004 0.032 -0.010 0.100 0.019 0.060 0.020 0.120 02/21/03 A 0.000 0.026 0.036 0.063 0.041 0.073 0.062 0.052 0.024 0.088 -0.034 0.059 0.100 0.140 03/12/03 A -0.004 0.023 -0.019 0.035 -0.022 0.040 -0.053 0.048 0.030 0.100 -0.035 0.057 0.070 0.120 04/09/03 A 0.011 0.023 -0.008 0.063 -0.009 0.072 0.016 0.030 0.008 0.078 -0.019 0.054 0.130 0.120 04/23/03 A 0.040 0.034 -0.019 0.097 -0.020 0.110 0.023 0.037 -0.033 0.090 0.005 0.067 0.030 0.140 10/09/03 0.012 0.014 -0.024 0.042 -0.028 0.048 -0.013 0.019 0.000 0.045 0.012 0.032 0.036 0.072 10/31/03 0.035 0.026 -0.018 0.098 -0.020 0.110 0.000 0.042 0.022 0.092 0.058 0.058 0.060 0.110 11/21/03 A 0.075 0.033 -0.007 0.047 -0.008 0.054 -0.077 0.054 -0.030 0.120 0.034 0.064 0.001 0.094 12/16/03 A 0.075 0.038 -0.080 0.120 -0.090 0.140 0.045 0.076 0.010 0.130 -0.043 0.065 0.030 0.140 22 01/14/03 -0.002 0.027 -0.016 0.053 -0.018 0.061 -0.009 0.050 -0.020 0.120 0.062 0.059 0.030 0.120 02/21/03 0.008 0.026 -0.005 0.055 -0.006 0.064 -0.016 0.044 0.030 0.130 0.018 0.063 0.100 0.130 03/12/03 0.006 0.021 -0.005 0.046 -0.005 0.053 0.011 0.026 0.088 0.075 0.059 0.051 0.060 0.140 04/09/03 0 .001 0.023 0.003 0.065 0.003 0.074 0.014 0.044 -0.080 0.110 -0.010 0.066 0.040 0.100 09/10/03 0.021 0.021 0.039 0.052 0.045 0.059 0.006 0.026 -0.010 0.073 -0.024 0.059 0.073 0.093 09/24/03 0.012 0.020 -0.057 0.085 -0.066 0.098 0.020 0.033 0.009 0.079 -0.019 0.055 0.067 0.088 10/09/03 0.018 0.015 0.000 0.061 0.000 0.070 -0.028 0.025 0.027 0.060 0.032 0.043 0.018 0.078 10/31/03 0.024 0.031 0.050 0.100 0.060 0.120 -0.024 0.040 -0.078 0.089 -0.026 0.070 0.050 0.120 11/21/03 0.029 0.024 -0.030 0.063 -0.034 0.072 -0.001 0.028 -0.032 0.084 -0.009 0.054 0.000 0.110 12/16/03 0.094 0.044 0.010 0.120 0.010 0.130 -0.014 0.060 -0.090 0.140 0.040 0.073 0.000 0.120 24C 01/14/03 0.032 0.030 -0.032 0.075 -0.037 0.086 -0.022 0.057 0.040 0.120 -0.013 0.063 0.116 0.086 02/21/03 0.031 0.034 0.003 0.067 0.004 0.077 -0.106 0.063 0.000 0.120 -0.040 0.063 0.080 0.120 03/12/03 0.032 0.024 0.000 0.033 0.000 0.038 0.017 0.033 0.070 0.100 0.004 0.055 0.050 0.100 04/09/03 0.047 0.027 0.012 0.052 0.014 0.060 -0.014 0.041 0.040 0.110 -0.032 0.065 -0.020 0.120 04/23/03 -0.007 0.025 0.037 0.071 0.043 0.082 -0.010 0.048 0.020 0.120 -0.001 0.068 0.150 0.140 05/07/03 0.009 0.020 -0.028 0.057 -0.033 0.065 -0.014 0.023 0.041 0.059 0.022 0.040 0.004 0.068 10/31/03 0.016 0.025 -0.058 0.087 -0.070 0.100 -0.011 0.036 0.029 0.077 0.000 0.055 0.140 0.110 11/21/03 0.029 0.022 0.007 0.042 0.008 0.048 0.000 0.025 -0.028 0.071 -0.003 0.048 0.070 0.120 12/16/03 0.022 0.028 0.030 0.100 0.040 0.110 -0.052 0.081 -0.060 0.120 0.002 0.062 -0.030 0.110 A: HAY 3-26

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 10 WELL WATER (PCS/L)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 Co-Ss FE-59 CO-60 70C 12/16/03 3 20 30 36 -12 21 -2.7 2.3 -0.1 2.2 -4.7 7.0 2.1 2.4 71 12/16/03 -14 21 -11 34 1 28 -0.4 2.4 -3.2 2.7 -1.1 8.0 -1.5 2.7 72 12/16/03 0 23 -8 32 -1 25 1.4 2.4 -1.6 2.9 0.0 6.5 0.4 3.3 COLLECTION LOCATION DATE ZN-65 ZR-95 NB-95 RU-103 RU-106 1-131 CS-134 70C 12/16/03 2.3 8.3 1.6 4.3 -1.7 2.7 -2.3 2.2 -3 16 1.6 6.1 0.9 1.8 71 12/16/03 7.5 9.7 -1.1 4.3 2.1 3.3 -2.0 2.7 -5 21 1.8 8.7 1.2 2.3 72 12/16/03 -6.1 5.7 -2.6 5.5 -0.3 3.3 -0.7 3.0 -2 20 3.5 7.4 0.9 2.6 COLLECTION LOCATION DATE CS-137 BA-140 LA-140 SD-125 TH-228 H-3 70C 12/16/03 1.3 1.9 -0.5 5.2 -0.5 6.0 3.5 5.2 4.1 8.4 0 850 71 12/16/03 0.2 2.6 0.6 5.5 0.7 6.3 -2.3 6.1 5.0 11.0 -10 840 72 12/16/03 1.5 2.4 -4.6 5.0 -5.3 5.8 0.0 7.1 7.7 8.9 70 850 3-27

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 12 FRUITS & VEGETABLES (PCI/G WET WT.)

COLLECTION LOCATION DATE TYPE BE-7 R-40 CR-51 MN-54 CO-58 FE-59 CO-60 25 06/17/03 Lettuce 0.190 0.110 2.550 0.340 0.015 0.066 -0.013 0.010 -0.002 0.010 -0.006 0.021 0.012 0.012 06/17/03 Strawberries -0.023 0.076 1.130 0.240 0.029 0.088 0.002 0.010 0.003 0.010 0.007 0.021 -0.005 0.010 09/17/03 Apples 0.046 0.058 0.620 0.110 0.002 0.063 -0.003 0.005 -0.004 0.005 -0.009 0.017 -0.001 0.006 09/17/03 Lettuce 0.324 0.079 3.310 0.190 0.037 0.071 -0.002 0.006 -0.003 0.006 -0.001 0.019 0.001 0.006 26C 06/17/03 Lettuce 0.034 0.089 2.390 0.310 -0.001 0.099 0.000 0.011 -0.010 0.010 -0.002 0.020 -0.008 0.010 06/17/03 Strawberries 0.009 0.089 1.090 0.240 0.078 0.089 -0.003 0.010 0.001 0.012 -0.001 0.022 0.004 0.012 09/17/03 Apples 0.007 0.029 0.916 0.090 -0.009 0.035 0.000 0.003 -0.002 0.003 -0.003 0.011 0.001 0.004 09/17/03 Cabbage -0.001 0.042 2.190 0.110 -0.020 0.037 -0.002 0.004 0.000 0.005 0.008 0.011 -0.001 0.004 COLLECTION LOCATION DATE TYPE ZN-65 ZR-95 NB-95 RU-103 RU-106 1-131 CS-134 25 06/17/03 Lettuce 0.018 0.041 -0.010 0.018 -0.001 0.011 -0.007 0.009 -0.048 0.076 0.010 0.013 0.005 0.010 06/17/03 Strawberries 0.003 0.024 -0.008 0.015 0.002 0.010 0.004 0.009 -0.018 0.086 0.013 0.016 0.004 0.010 09/17/03 Apples 0.005 0.011 -0.006 0.010 0.004 0.007 0.001 0.006 -0.030 0.051 -0.035 0.026 0.005 0.005 09/17/03 Lettuce -0.024 0.015 0.007 0.011 0.009 0.008 -0.001 0.007 -0.018 0.055 0.003 0.028 0.001 0.007 26C 06/17/03 Lettuce -0.015 0.025 -0.007 0.017 0.003 0.011 -0.004 0.010 0.010 0.089 -0.002 0.018 -0.010 0.012 06/17/03 Strawberries -0.010 0.028 -0.002 0.018 -0.002 , 0.013 -0.009 0.010 -0.130 0.110 -0.013 0.017 -0.004 0.012 09/17/03 Apples -0.005 0.007 0.003 0.007 -0.001 0.004 -0.005 0.004 0.011 0.031 -0.001 0.013 -0.002 0.005 09/17/03 Cabbage -0.008 0.008 0.006 0.006 0.003 0.004 -0.003 0.004 -0.014 0.032 -0.004 0.014 0.001 0.003 COLLECTION LDCATION DATE TYPE CS-137 BA-140 LA-140 CE-141 CE-144 SB-125 TH-228 25 06/17/03 Lettuce -0.013 0.010 -0.020 0.014 -0.023 0.016 0.000 0.012 0.001 0.034 -0.009 0.023 0.006 0.035 06/17/03 Strawberries 0.005 0.010 0.013 0.013 0.015 0.014 -0.007 0.013 -0.013 0.046 -0.015 0.024 -0.014 0.044 09/17/03 Apples 0.000 0.006 0.003 0.013 0.004 0.016 -0.003 0.015 0.007 0.026 -0.005 0.013 -0.010 0.027 09/17/03 Lettuce 0.004 0.006 -0.015 0.016 -0.018 0.019 0.001 0.010 0.026 0.031 0.007 0.014 0.007 0.027 26C 06/17/03 Lettuce 0.008 0.011 0.010 0.014 0.110 0.016 -0.008 0.015 -0.016 0.053 0.002 0.027 -0.004 0.037 06/17/03 Strawberries 0.000 0.009 0.001 0.016 0.002 0.018 -0.001 0.015 0.025 0.057 -0.001 0.027 0.036 0.041 09/17/03 Apples 0.001 0.004 -0.005 0.009 -0.005 0.011 -0.011 0.008 -0.014 0.015 0.004 0.008 -0.005 0.020 09/17/03 Cabbage 0.000 0.004 -0.003 0.008 -0.004 0.009 -0.011 0.008 0.003 0.016 0.005 0.008 0.016 0.019 3-28

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 13 BROADLEAF VEGETATION (PCI/G WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 Co-58 FE-59 CO-60

(+/- ( +/-) (+/-) (+/-) (+/-) (./-) (+/-)

1 05/29/03 0.39 0.30 3.75 0.79 -0.18 0.23 0.013 0.023 0.014 0.022 -0.062 0.051 0.000 0.028 06/25/03 0.62 0.24 5.16 0.93 -0.08 0.14 0.000 0.019 -0.010 0.019 0.012 0.046 -0.025 0.027 07/09/03 0.28 0.26 3.57 0.66 -0.01 0.16 0.000 0.019 -0.015 0.021 -0.011 0.040 -0.008 0.020 08/20/03 2.19 0.49 2.62 0.68 0.17 0.30 -0.016 0.024 -0.008 0.021 0.012 0.093 0.003 0.019 09/08/03 0.51 0.26 4.06 0.83 0.09 0.21 -0.009 0.023 0.022 0.029 -0.019 0.079 0.019 0.030 10/06/03 0.71 0.31 2.85 0.57 0.12 0.24 -0.002 0.017 0.000 0.021 -0.017 0.065 0.008 0.025 10 05/29/03 0.62 0.20 2.60 0.59 0.12 0.11 0.007 0.017 -0.009 0.019 0.020 0.034 -0.007 0.015 06/25/03 0.92 0.19 2.37 0.46 -0.06 0.09 0.020 0.012 -0.003 0.013 0.032 0.032 -0.013 0.016 07/09/03 0.04 0.17 2.58 0.60 -0.03 0.14 0.002 0.015 -0.013 0.020 0.000 0.038 0.011 0.022 08/20/03 0.40 0.26 2.39 0.69 -0.16 0.18 -0.009 0.013 -0.008 0.028 -0.022 0.090 -0.001 0.020 09/08/03 0.29 0.19 4.36 0.74 0.07 0.17 0.010 0.021 0.006 0.020 -0.026 0.074 0.011 0.024 10/06/03 0.66 0.32 3.98 0.72 0.03 0.24 0.008 0.021 0.000 0.026 -0.001 0.072 0.000 0.022 17 05/29/03 0.49 0.31 2.22 0.64 -0.18 0.19 0.000 0.017 -0.010 0.020 0.015 0.047 -0.007 0.017 06/25/03 0.91 0.30 2.71 0.57 -0.16 0.16 0.013 0.020 -0.007 0.020 -0.008 0.049 0.012 0.022 07/09/03 0.25 0.23 2.43 0.57 0.17 0.22 0.005 0.021 0.002 0.027 -0.024 0.055 -0.015 0.023 08/20/03 0.44 0.24 3.40 0.72 -0.05 0.19 -0.005 0.019 -0.021 0.022 0.004 0.067 -0.020 0.027 09/08/03 0.94 0.41 2.19 0.65 -0.18 0.29 -0.030 0.030 0.000 0.031 -0.012 0.072 0.000 0.025 10/06/03 1.15 0.24 2.44 0.36 -0.03 0.17 -0.010 0.015 0.003 0.015 -0.002 0.047 0.000 0.015 3-29

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 13 BROADLEAF VEGZTATION (PCI/G WET WT.)

COLLECTION LOCATION DATE ZN-65 ZR-95 NB-95 RU-103 RU-106 I-131 CS-134 (4/-) (4/-) (4/-)

1 05/29/03 -0.037 0.066 0.000 0.034 0.003 0.020 0.008 0.024 0.14 0.22 0.032 0.053 0.023 0.027 06/25/03 -0.018 0.057 0.017 0.033 0.002 0.022 0.005 0.018 0.00 0.16 -0.016 0.025 -0.012 0.024 07/09/03 -0.071 0.058 -0.012 0.039 -0.004 0.022 0.013 0.020 0.03 0.02 0.024 0.063 0.000 0.022 08/20/03 -0.066 0.069 0.036 0.054 0.037 0.038 0.018 0.034 0.14 0.24 0.010 0.110 0.015 0.026 09/08/03 -0.006 0.062 -0.032 0.045 0.013 0.029 0.000 0.025 0.00 0.20 -0.017 0.071 0.022 0.029 10/06/03 -0.026 0.053 -0.006 0.039 0.007 0.032 0.008 0.026 -0.01 0.18 -0.030 0.015 -0.028 0.019 10 05/29/03 -0.029 0.038 -0.012 0.029 0.007 0.017 -0.003 0.016 -0.04 0.14 0.017 0.028 0.009 0.015 06/25/03 0.009 0.039 -0.009 0.023 0.010 0.014 0.003 0.013 -0.06 0.11 0.003 0.016 0.001 0.015 07/09/03 -0.043 0.045 0.018 0.027 -0.004 0.024 -0.019 0.019 -0.03 0.15 -0.018 0.063 0.008 0.022 08/20/03 0.034 0.059 0.004 0.043 -0.005 0.031 -0.019 0.023 -0.02 0.15 0.026 0.076 -0.014 0.016 09/08/03 -0.023 0.047 -0.004 0.036 -0.013 0.023 -0.001 0.019 0.07 0.16 -0.050 0.045 -0.017 0.022 10/06/03 -0.078 0.066 0.013 0.044 0.000 0.026 -0.019 0.025 -0.02 0.19 0.047 0.044 0.009 0.019 17 05/29/03 -0.014 0.059 0.022 0.043 0.002 0.028 0.012 0.028 0.03 0.19 0.004 0.051 0.008 0.022 06/25/03 0.016 0.053 0.003 0.034 0.012 0.023 0.002 0.021 0.00 0.20 0.014 0.031 -0.009 0.019 07/09/03 -0.005 0.055 -0.017 0.041 0.001 0.032 -0.007 0.027 -0.10 0.21 0.060 0.100 0.008 0.024 08/20/03 -0.039 0.057 0.017 0.046 -0.014 0.027 0.004 0.021 -0.03 0.18 0.025 0.086 0.031 0.027 09/08/03 -0.043 0.068 -0.029 0.051 -0.018 0.033 0.010 0.028 -0.02 0.23 0.000 0.072 0.011 0.032 10/06/03 -0.010 0.032 0.004 0.027 -0.003 0.021 -0.002 0.018 0.07 0.13 0.018 0.031 0.008 0.015 3-30

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 13 BROADLEAF VEGETATION (PCI/G WET WT.)

COLLECTION LOCATION DATE CS-137 BA-140 LA-140 CE-141 CE-144 SB-125 TR-228 1 05/29/03 -0.001 0.024 0.000 0.021 0.000 0.024 0.014 0.028 -0.067 0.094 -0.010 0.053 0.090 0.100 06/25/03 -0.027 0.018 0.034 0.039 0.039 0.045 -0.012 0.022 -0.018 0.067 -0.008 0.049 0.044 0.088 07/09/03 -0.005 0.017 -0.016 0.052 -0.019 0.060 -0.017 0.026 0.031 0.059 0.025 0.042 0.013 0.084 08/20/03 0.071 0.035 0.000 0.070 0.000 0.081 -0.035 0.040 -0.050 0.120 -0.004 0.064 -0.063 0.095 09/08/03 -0.017 0.018 -0.037 0.058 -0.042 0.067 -0.018 0.029 0.014 0.077 0.012 0.055 0.060 0.100 10/06/03 0.026 0.023 0.023 0.077 0.026 0.088 -0.067 0.033 -0.015 0.084 0.006 0.048 -0.016 0.076 10 05/29/03 -0.005 0.013 -0.006 0.026 -0.007 0.030 -0.012 0.016 -0.011 0.049 0.006 0.035 -0.025 0.059 06/25/03 0.011 0.015 0.014 0.017 0.016 0.020 -0.004 0.015 0.017 0.044 -0.006 0.030 0.030 0.057 07/09/03 0.005 0.015 -0.009 0.049 -0.011 0.056 0.001 0.022 0.029 0.059 0.032 0.039 0.019 0.074 08/20/03 -0.009 0.020 0.035 0.062 0.041 0.072 -0.014 0.026 -0.020 0.066 0.014 0.050 0.050 0.100 09/08/03 -0.005 0.017 -0.006 0.046 -0.007 0.053 -0.003 0.023 -0.013 0.063 0.009 0.038 0.008 0.067 10/06/03 -0.001 0.016 -0.021 0.073 -0.024 0.083 -0.025 0.036 0.027 0.097 -0.028 0.051 0.031 0.060 17 05/29/03 0.044 0.029 -0.034 0.041 -0.040 0.047 -0.007 0.030 -0.056 0.088 0.000 0.051 0.050 0.084 06/25/03 0.006 0.019 0.022 0.027 0.025 0.031 -0.003 0.026 0.021 0.082 0.007 0.044 0.024 0.067 07/09/03 0.004 0.023 -0.058 0.054 -0.066 0.062 -0.031 0.035 0.070 0.110 -0.024 0.041 0.045 0.084 08/20/03 0.013 0.020 0.010 0.070 0.011 0.080 -0.009 0.028 0.004 0.074 0.051 0.047 0.064 0.086 09/08/03 0.012 0.026 0.000 0.061 0.000 0.071 -0.028 0.042 0.020 0.130 0.035 0.057 0.053 0.088 10/06/03 0.007 0.014 0.022 0.042 0.025 0.049 -0.021 0.024 -0.028 0.062 0.043 0.034 0.037 0.067 3-31

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 14 SEA WATER (PCX/L)

COLLECTION LOCATION DATE BE-7 1-40 CR-51 MN-54 CO-58 FE-59 Co-60 32 01/28/03 -16 16 262 51 7 22 -0.1 2.0 0.1 2.0 1.3 4.9 -0.8 2.2 02/25/03 12 19 343 59 -4 23 1.1 2.3 1.2 2.1 1.5 4.6 0.3 2.1 03/25/03 4 24 298 83 -12 25 -0.1 2.7 -0.5 3.0 -1.5 5.3 -2.7 3.5 04/29/03 5 16 222 43 -17 20 -1.5 1.5 -0.6 1.6 2.2 3.9 0.5 1.7 05/27/03 0 19 211 63 -2 21 0.2 2.7 -1.2 2.2 0.5 4.8 1.0 2.9 06/24/03 -9 14 265 45 8 13 0.1 1.6 0.5 1.5 -1.2 3.4 0.3 1.8 07/29/03 -19 24 284 70 2 21 0.3 2.2 0.8 2.4 -1.6 5.5 0.0 3.0 08/26/03 12 24 263 91 16 29 -0.9 3.4 2.2 4.0 5.2 8.1 -1.0 4.1 09/30/03 -11 14 325 39 -18 18 0.0 1.4 -0.4 1.4 -6.5 4.1 0.3 1.4 10/28/03 18 18 274 54 -20 21 0.8 2.0 -0.2 1.9 -8.4 6.3 -0.5 1.8 11/25/03 0 3 286 13 -2 4 0.0 0.3 -0.3 0.4 0.3 1.1 -0.2 0.4 12/30/03 -11 15 279 41 2 19 -0.9 1.3 -1.2 1.7 2.7 4.3 0.0 1.5 35X 03/11/03 2 16 290 55 11 19 0.4 1.9 -0.4 1.8 -1.1 4.2 -1.3 2.2 06/10/03 -11 19 202 60 10 23 0.0 2.3 1.2 2.4 1.3 5.4 -0.2 2.1 09/16/03 -1 14 290 38 -9 15 0.2 1.4 -0.3 1.5 1.5 4.3 -0.6 1.3 12/03/03 -4 25 249 80 13 29 0.0 3.0 0.3 3.2 2.2 9.0 -1.3 3.5 37C 02/25/03 13 22 184 55 -13 21 -0.2 2.0 1.6 1.9 0.5 4.5 -1.3 3.0 06/03/03 -7 28 228 90 -20 25 -2.1 4.3 1.6 3.9 -3.4 9.0 2.1 4.3 08/26/03 6 21 275 70 -34 33 -2.5 2.8 2.1 2.8 -4.6 8.3 -1.3 2.7 12/30/03 9 26 273 70 13 28 1.5 3.0 0.7 2.6 9.0 11.0 -0.8 3.2 39X 03/11/03 9 17 290 52 -11 20 0.0 1.7 -0.4 1.8 1.0 4.0 0.4 1.9 06/10/03 -4 20 278 69 5 20 -2.3 2.6 0.2 2.7 -5.4 5.6 0.0 3.4 09/16/03 -1 13 299 38 3 16 -0.9 1.4 -0.9 1.4 3.7 4.1 -0.7 1.6 12/03/03 -4 28 274 79 12 26 -1.6 3.2 -1.6 2.7 1.0 11.0 0.3 3.7 3-32

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 14 SEA WATER (PCI/L)

COLLECTION LOCATION DATE ZN-65 ZR-95 NB-95 RU-103 RU-106 1-131 CS-134

-- - - -- - -- - - (--

- - -- - - - - -- - - - - -- - - - - -- -- -- - -- - - - -/ ) ----------- ( /

32 01/28/03 -1.8 4.9 -1.8 3.5 -2.5 2.2 -0.7 2.2 -3 17 -2.0 5.8 -0.9 1.9 02/25/03 -1.0 5.8 0.8 4.3 0.5 2.4 1.2 2.4 14 17 -3.5 6.1 -0.2 2.0 03/25/03 -1.5 5.4 -1.4 5.0 -3.6 3.8 0.8 3.2 30 29 -1.6 4.3 -0.3 3.6 04/29/03 -3.5 3.8 3.0 3.0 1.6 2.0 30.0 1.8 19 15 -1.6 5.1 0.8 1.9 05/27/03 -6.6 5.9 3.7 4.2 -0.4 2.6 -2.1 2.6 7 24 4.6 4.6 0.2 2.0 06/24/03 -0.6 3.6 0.9 2.7 -0.6 1.7 -0.3 1.6 -11 14 -0.1 3.9 1.6 1.7 07/29/03 -0.6 7.0 0.3 1.6 -1.1 3.4 -1.1 2.8 -12 23 3.1 4.2 -0.5 2.5 08/26/03 -6.5 9.0 -0.3 6.3 -3.7 3.8 0.9 3.4 -6 28 -1.6 4.7 -1.2 2.6 09/30/03 -1.7 3.5 -0.5 2.5 0.9 1.7 -1.3 1.6 9 13 1.2 5.1 0.0 1.6 10/28/03 -3.7 5.6 -2.0 3.5 -0.3 2.3 -1.2 2.1 5 18 1.3 4.1 0.1 2.0 11/25/03 -0.9 0.8 -0.2 0.6 0.0 0.4 -0.6 0.4 -3 3 0.7 1.6 0.3 0.4 12/30/03 -5.8 3.7 0.6 2.9 0.1 2.0 1.0 1.8 -7 13 3.8 5.5 0.1 1.6 35X 03/11/03 -0.6 4.8 0.5 3.7 0.2 2.4 -1.9 2.5 10 17 -0.8 3.7 2.4 2.2 06/10/03 1.4 5.0 0.6 4.0 0.9 2.5 -2.1 2.4 -6 24 2.7 4.2 0.9 2.4 09/16/03 -0.3 3.4 -0.6 2.6 -0.9 1.7 -0.8 1.8 -8 13 1.5 4.1 -1.0 1.4 12/03/03 -7.0 8.2 4.2 5.8 -1.5 3.7 -1.4 3.4 2 28 0.8 4.5 -1.0 3.5 37C 02/25/03 -0.9 4.9 -1.7 4.3 -0.1 2.8 -1.7 2.5 -3 21 1.6 6.0 2.0 2.7 06/03/03 -6.9 8.1 -1.8 6.4 -2.2 3.7 -2.6 3.8 11 27 2.2 5.1 -1.7 4.4 08/26/03 -2.2 5.4 -2.7 4.6 1.6 3.1 -0.4 2.6 -10 26 1.8 5.6 -1.0 2.8 12/30/03 1.9 7.1 1.8 4.7 -0.1 4.2 -0.9 3.1 2 24 3.0 8.2 -0.8 2.9 39X 03/11/03 0.8 3.5 0.9 3.0 0.6 1.9 0.8 2.0 -2 17 0.2 3.9 -1.3 2.0 06/10/03 -1.0 6.3 4.6 4.7 -1.3 2.8 -2.3 2.7 16 19 -1.5 4.2 -1.4 2.9 09/16/03 -4.7 3.4 0.1 2.8 0.2 1.9 -0.3 1.8 -3 14 0.9 4.2 0.4 1.5 12/03/03 -0.7 7.9 1.3 5.9 -3.1 3.2 -1.3 3.2 1 27 0.0 5.4 0.7 3.4 3-33

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 14 SEA WATER (PCI/L)

COLLECTION LOCATION DATE CS-137 BA-140 LA-140 .SB-125 TH-228 H-3

(+/ ) (+--) (---) (+--) (-- /-) (--- )

32 01/28/03 -0.7 2.1 1.6 4.2 1.8 4.8 -1.9 4.8 -1.7 7.5 360 170 02/25/03 -1.3 2.2 1.7 4.6 2.0 5.3 -8.3 5.3 1.8 8.6 330 170 03/25/03 -2.6 3.1 -1.4 6.1 -1.7 7.1 -5.4 8.1 0.0 13.0 660 180 04/29/03 0.9 1.6 3.4 3.4 4.0 3.9 0.5 4.3 0.7 6.3 390 170 05/27/03 -2.7 2.8 0.9 4.6 1.0 5.3 -1.5 6.3 -2.8 9.5 240 170 06/24/03 0.2 1.5 -2.2 2.6 -2.5 3.0 1.1 3.7 3.6 6.0 460 170 07/29/03 -1.1 2.5 1.5 4.3 1.7 4.9 1.7 6.8 -1.9 9.7 630 190 08/26/03 -1.4 3.3 -1.8 5.2 -2.1 5.9 -5.1 8.6 5.0 11.0 360 190 09/30/03 -0.1 1.5 -1.4 3.1 -1.6 3.6 -1.3 3.9 -2.7 5.6 570 190 10/28/03 0.5 2.1 -0.7 3.0 -0.8 3.5 1.2 5.3 1.1 7.7 870 180 11/25/03 0.5 0.3 -0.1 0.9 -0.1 1.0 0.0 0.9 -1.2 3.0 290 170 12/30/03 0.6 1.7 -3.1 3.5 -3.6 4.0 -2.0 3.9 -4.9 5.9 360 170 35X 03/11/03 0.5 1.9 -1.8 2.8 -2.0 3.2 2.9 5.5 -0.2 7.1 -40 830 06/10/03 -2.4 2.7 -1.7 3.4 -2.0 3.9 -4.2 5.8 5.0 11.0 0 160 09/16/03 -0.2 1.4 -1.0 2.6 -1.1 3.0 -1.3 3.6 1.6 6.2 -40 180 12/03/03 2.1 2.9 3.3 5.1 3.8 5.9 0.0 7.6 -3.0 11.0 -140 790 37C 02/25/03 1.2 2.4 0.0 5.3 0.0 6.1 -2.1 6.2 3.7 9.2 280 840 06/03/03 0.0 2.8 1.3 5.3 1.5 6.1 2.0 8.0 -6.0 13.0 0 840 08/26/03 -0.6 2.6 -3.8 3.6 -4.4 4.1 0.4 7.0 13.0 11.0 -50 190 12/30/03 0.2 2.3 2.0 5.2 2.4 6.0 0.5 6.8 -2.3 8.9 230 810 39X 03/11/03 -2.0 2.1 -1.6 3.3 -1.9 3.8 0.8 5.4 1.4 6.7 30 840 06/10/03 0.9 2.4 -1.8 3.9 -2.1 4.4 1.5 6.4 7.2 8.8 -130 160 09/16/03 0.5 1.3 -1.5 2.8 -1.7 3.2 -0.6 3.8 -1.9 5.4 -110 800 12/03/03 -1.6 3.3 -1.3 4.4 -1.4 5.0 6.3 7.5 -7.0 13.0 90 810 3-34

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 15 BOTTOM SEDIMENT (PCI/a DRY WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 CO-58 FE-59

(+1-) (+1-) (+/-)

31 05/07/03 0.14 0.35 11.80 0.99 0.34 0.48 0.026 0.040 -0.002 0.033 0.027 0.069 11/14/03 -0.04 0.26 12.17 0.79 -0.13 0.36 -0.042 0.021 -0.015 0.024 -0.029 0.059 32 03/10/03 0.20 0.26 13.80 1.00 -0.08 0.33 0.006 0.030 -0.001 0.028 -0.010 0.067 06/17/03 0.35 0.24 13.69 0.80 0.00 0.21 0.003 0.020 -0.010 0.018 -0.032 0.044 09/16/03 0.02 0.13 13.74 0.54 0.11 0.16 0.011 0.013 -0.010 0.014 -0.016 0.032 11/18/03 0.13 0.17 12.69 0.87 0.14 0.20 -0.009 0.022 -0.017 0.021 -0.027 0.052 33 05/06/03 0.17 0.19 19.00 1.20 -0.07 0.19 0.002 0.024 -0.008 0.026 0.000 0.071 10/22/03 0.21 0.21 13.11 0.82 0.27 0.36 0.002 0.016 0.007 0.022 -0.017 0.067 34 05/06/03 -0.02 0.20 19.00 1.20 0.04 0.25 0.005 0.022 0.006 0.026 0.004 0.073 10/22/03 -0.06 0.25 13.50 1.00 0.02 0.40 0.003 0.021 -0.010 0.026 0.005 0.084 35X 03/10/03 0.36 0.29 13.80 1.30 -0.24 0.29 0.010 0.033 -0.018 0.033 0.041 0.076 06/17/03 0.13 0.18 13.46 0.74 0.00 0.20 0.003 0.019 -0.026 0.020 -0.043 0.049 09/16/03 0.16 0.16 12.78 0.60 -0.02 0.18 0.013 0.017 -0.007 0.016 -0.020 0.039 11/18/03 0.15 0.22 13.53 0.97 0.02 0.27 0.013 0.025 -0.015 0.025 -0.064 0.064 36X 05/07/03 -0.08 0.19 15.42 0.92 0.03 0.23 -0.010 0.020 0.007 0.021 0.048 0.055 11/20/03 0.04 0.15 15.69 0.93 -0.03 0.19 -0.005 0.017 -0.012 0.018 -0.030 0.050 37C 05/07/03 -0.01 0.17 13.40 0.83 0.08 0.22 -0.004 0.017 -0.010 0.020 0.061 0.047 10/23/03 0.00 0.08 19.68 0.53 -0.07 0.13 -0.003 0.010 0.008 0.011 -0.011 0.033 39X 03/10/03 -0.01 0.29 15.60 1.30 -0.01 0.36 0.021 0.033 -0.027 0.035 -0.015 0.085 06/17/03 -0.14 0.17 14.48 0.65 -0.09 0.33 0.006 0.018 -0.010 0.018 -0.003 0.039 09/16/03 -0.08 0.15 13.93 0.64 -0.15 0.19 -0.001 0.017 -0.013 0.017 -0.046 0.042 11/18/03 0.23 0.22 13.60 1.00 0.07 0.23 0.005 0.027 -0.018 0.027 0.003 0.063 67X 05/06/03 -0.01 0.23 16.00 1.10 -0.02 0.35 0.031 0.026 -0.025 0.030 0.033 0.074 11/14/03 0.19 0.21 15.56 0.99 0.22 0.25 -0.003 0.021 -0.004 0.025 0.009 0.065 3-35

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 15 BOTTOM SEDIMENT (PCI/G DRY WT.)

COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 RU-103 RU-106

( /-) ('/-) (,/-)

31 05/07/03 0.043 0.030 -0.060 0.150 0.056 0.069 -0.032 0.049 -0.007 0.044 -0.14 0.36 11/14/03 -0.007 0.022 -0.050 0.110 -0.060 0.280 -0.006 0.034 -0.013 0.032 0.03 0.25 32 03/10/03 0.036 0.028 0.090 0.130 -11.000 6.600 0.008 0.056 -0.002 0.033 0.27 0.24 06/17/03 0.020 0.020 0.002 0.075 -4.900 3.800 -0.024 0.024 -0.005 0.019 -0.10 0.17 09/16/03 0.022 0.011 -0.011 0.060 -4.700 3.400 0.005 0.017 0.009 0.014 -0.15 0.12 11/18/03 0.011 0.021 0.039 0.094 -6.000 5.100 -0.026 0.028 0.005 0.020 -0.11 0.16 33 05/06/03 0.008 0.026 -0.040 0.120 -0.048 0.066 -0.007 0.036 0.004 0.026 0.02 0.16 10/22/03 0.001 0.019 0.016 0.079 -0.020 0.057 -0.022 0.036 -0.006 0.028 -0.05 0.17 34 05/06/03 0.006 0.022 0.030 0.110 -0.069 0.097 0.012 0.032 -0.019 0.024 0.07 0.18 10/22/03 -0.001 0.021 -0.032 0.061 -0.034 0.063 0.033 0.045 0.000 0.034 0.10 0.18 35X 03/10/03 0 .019 0.036 0.060 0.150 -0.070 0.130 -0.071 0.067 -0.003 0.031 -0.07 0.25 06/17/03 -0.006 0.019 0.042 0.087 -0.040 0.480 0.014 0.027 -0.007 0.021 0.03 0.18 09/16/03 0.012 0.014 0.011 0.074 -8.500 4.700 0.002 0.034 0.012 0.020 -0.05 0. 14 11/18/03 0.009 0.024 -0.030 0.120 -9.900 5.900 -0.019 0.033 0.001 0.025 0.00 0.23 36X 05/07/03 -0.010 0.019 -0.062 0.060 -0.081 0.049 -0.004 0.033 0.015 0.025 0.03 0.17 11/20/03 0.003 0.020 0.010 0.098 -0.090 0.047 0.001 0.022 0.009 0.019 0.08 0.17 37C 05/07/03 -0.010 0.019 -0.053 0.052 -0.003 0.047 -0.009 0.025 -0.004 0.021 0.01 0.16 10/23/03 0.002 0.010 -0.016 0.049 0.008 0.086 0.014 0.016 0.004 0.012 -0.06 0.09 39X 03/10/03 -0.003 0.040 -0.020 0.160 0.013 0.069 -0.021 0.046 0.016 0.034 -0.24 0.33 06/17/03 0.022 0.016 -0.017 0.070 0.060 0.130 -0.028 0.031 -0.015 0.019 -0.08 0.16 09/16/03 0.023 0.017 -0.027 0.076 -0.060 0.190 0.000 0.025 -0.007 0.020 -0.07 0.15 11/18/03 0 .009 0.033 0.050 0.110 -8.400 5.600 0.007 0.057 0.000 0.027 0.08 0.20 67X 05/06/03 0.002 0.024 -0.030 0.130 -0.600 0.100 -0.016 0.038 0.025 0.034 0.00 0.23 11/14/03 -0.020 0.024 0.100 0.100 -8.600 5.200 -0.008 0.031 -0.004 0.024 0.02 0.19 3-36

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 15 BOTTOM SEDIMENT (PCI/O DRY WT.)

COLLECTION LOCATION DATE AG-lOM 1-131 CS-134 CS-137 SB-125 TH-228

(,/-) (,/-) (4/-) (4/-) (4/-) (3 / )

31 05/07/03 0.012 0.043 -0.050 0.200 -0.015 0.057 -0.045 0.041 0.033 0.092 3.53 0.18 11/14/03 -0.006 0.031 -0.010 0.130 0.006 0.025 -0.017 0.031 -0.016 0.071 3.03 0.13 32 03/10/03 0.033 0.036 -0.077 0.099 0.007 0.026 0.042 0.033 -0.045 0.071 1.63 0.13 06/17/03 0.006 0.027 -0.005 0.057 0.066 0.065 -0.002 0.020 0.018 0.047 0.74 0.08 09/16/03 0.009 0.016 0.007 0.045 -0.016 0.044 0.007 0.014 -0.018 0.037 0.73 0.05 11/18/03 0.007 0.023 -0.043 0.054 -0.001 0.016 0.009 0.020 -0.008 0.047 0.60 0.09 33 05/06/03 0.011 0.032 -0.030 0.110 0.066 0.084 -0.003 0.020 -0.007 0.051 0.27 0.09 10/22/03 -0.003 0.022 -0.130 0.500 0.001 0.058 0.004 0.010 -0.004 0.044 0.13 0.09 34 05/06/03 -0.050 0.031 0.030 0.110 -0.015 0.019 0.000 0.022 0.003 0.058 0.27 0.09 10/22/03 0.004 0.035 -0.310 0.560 0.015 0.031 0.009 0.019 0.026 0.055 0.11 0.09 35X 03/10/03 0 .001 0.036 0.021 0.081 0.010 0.025 0.011 0.034 0.050 0.072 0.91 0.12 06/17/03 0.017 0.023 0.023 0.058 -0.051 0.069 0.025 0.024 0.055 0.050 0.85 0.08 09/16/03 0.001 0.020 0.003 0.054 0.019 0.060 0.013 0.017 0.014 0.039 0.85 0.06 11/18/03 0.000 0.031 0.108 0.078 0.000 0.024 0.032 0.028 -0.058 0.063 0.99 0.11 36x 05/07/03 0.001 0.027 0.043 0.095 0.014 0.028 -0.007 0.018 0.000 0.044 0.42 0.09 11/20/03 0.008 0.015 0.025 0.050 -0.012 0.018 0.006 0.021 0.016 0.043 0.33 0.07 37C 05/07/03 0.016 0.023 -0.027 0.091 -0.017 0.069 0.006 0.017 0.014 0.041 0.21 0.07 10/23/03 0.006 0.013 -0.035 0.066 0.021 0.031 0.004 0.009 -0.022 0.022 0.66 0.04 39X 03/10/03 0.050 0.048 0.120 0.100 0.040 0.038 0.007 0.039 0.034 0.078 1.12 0.16 06/17/03 -0.009 0.022 -0.054 0.061 0.037 0.060 0.022 0.020 0.004 0.050 1.04 0.07 09/16/03 0.010 0.020 -0.010 0.056 0.004 0.016 0.054 0.025 0.010 0.044 1.12 0.07 11/18/03 -0.002 0.032 0.038 0.076 -0.002 0.022 0.042 0.036 0.046 0.061 1.03 0.11 67x 05/06/03 0.004 0.029 -0.140 0.160 0.037 0.089 0.112 0.040 -0.062 0.066 0.82 0.11 11/14/03 -0.021 0.030 -0.031 0.099 0.002 0.020 0.123 0.036 0.002 0.057 0.55 0.10 3-37

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 16 AQUATIC FLORA-FUCUS (PCX/G WET WT.)

COLLECTION LOCATION DATI BE-7 K-40 CR-51 MN-54 CO-58 FZ-59

(+1-) (./ ) ( ,'-) ('/-) (+/-)

32X 03/11/03 0.045 0.075 6.26 0.46 -0.022 0.077 -0.002 0.009 -0.006 0.009 0.002 0.021 06/11/03 0.190 0.140 7.00 0.81 0.010 0.140 0.000 0.015 -0.003 0.013 0.004 0.047 09/16/03 0.040 0.160 5.95 0.64 0.100 0.220 0.012 0.017 0.006 0.016 -0.002 0.063 12/03/03 -0.029 0.070 9.00 0.47 0.016 0.091 -0.005 0.009 0.005 0.009 0.017 0.034 33X 05/06/03 -0.011 0.071 1.95 0.30 -0.090 0.086 0.002 0.007 0.003 0.009 -0.007 0.023 10/22/03 0.101 0.095 6.45 0.81 0.015 0.089 -0.004 0.013 -0.004 0.014 0.014 0.050 35X 03/11/03 0.320 0.130 4.79 0.54 -0.005 0.071 -0.004 0.011 0.007 0.010 -0.017 0.028 06/10/03 0.070 0.100 5.99 0.71 -0.070 0.110 -0.004 0.014 -0.008 0.013 0.000 0.039 09/16/03 0.038 0.079 5.45 0.40 -0.034 0.098 -0.006 0.007 0.008 0.009 0.031 0.039 12/03/03 0.059 0.086 7.94 0.57 0.026 0.096 0.002 0.010 -0.007 0.013 0.031 0.053 36X 05/07/03 0.078 0.080 2.15 0.33 0.012 0.089 -0.002 0.007 -0.004 0.008 0.012 0.022 11/20/03 0.330 0.120 11.61 0.63 -0.020 0.110 0.005 0.010 -0.002 0.011 -0.014 0.039 39X 03/11/03 0.071 0.084 5.83 0.56 0.026 0.069 0.003 0.010 0.006 0.010 -0.002 0.026 06/10/03 0.160 0.140 7.27 0.74 0.020 0.140 -0.004 0.013 0.013 0.016 0.003 0.047 09/16/03 0.130 0.110 8.44 0.47 0.030 0.140 -0.004 0.008 -0.002 0.010 0.032 0.041 12/03/03 0.000 0.120 7.88 0.64 0.080 0.160 0.003 0.011 0.003 0.018 -0.013 0.052 3-38

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 16 AQUATIC FLORA-FUCUS (PCI/S WET WT.)

COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 N8-95 RU-103 RU-106

(.1-) (4/-) (4/-)

32X 03/11/03 0.003 0.008 0.012 0.026 0.024 0.017 0.001 0.010 0.006 0.008 0.057 0.071 06/11/03 0.016 0.014 -0.012 0.048 0.005 0.028 0.000 0.018 0.011 0.014 -0.030 0.120 09/16/03 0.008 0.014 -0.008 0.041 -0.003 0.030 -0.007 0.030 -0.004 0.020 0.100 0.130 12/03/03 0.002 0.009 -0.001 0.021 -0.009 0.016 -0.015 0.013 -0.003 0.010 0.042 0.069 33X 05/06/03 0.008 0.006 0.007 0.019 -0.004 0.015 -0.002 0.013 0.001 0.010 -0.085 0.077 10/22/03 0.001 0.015 -0.049 0.047 0.012 0.023 0.005 0.016 -0.008 0.010 -0.010 0.100 3515 03/11/03 0.003 0.013 0.000 0.024 0.005 0.015 -0.007 0.009 -0.002 0.009 -0.070 0.100 06/10/03 -0.001 0 .011 -0.018 0.040 -0.007 0.022 0.004 0.018 -0.008 0.011 0.030 0.130 09/16/03 -0.010 0.009 -0.013 0.021 -0.011 0.017 -0.003 0.014 -0.007 0.010 -0.024 0.075 12/03/03 0.003 0.011 -0.011 0.028 0.012 0.022 -0.008 0.017 -0.009 0.011 0.*032 0.069 36X 05/07/03 0.005 0.010 0.000 0.022 0.003 0.015 0.000 0.009 0.007 0.010 -0.023 0.059 11/20/03 0.003 0.011 -0.029 0.033 0.006 0.022 -0.003 0.014 -0.009 0.010 -0.070 0.091 39X 03/11/03 0.009 0.014 -0.007 0.022 -0.007 0.017 0.006 0.011 0.007 0.008 0.000 0.080 06/10/03 -0.002 0 .017 -0.001 0.072 0.000 0.027 0.016 0.017 0.005 0.015 -0.150 0.140 09/16/03 0.003 0.009 -0.007 0.027 0 .001 0.017 -0.008 0.015 0.004 0.012 -0.004 0.071 12/03/03 0.004 0.012 -0.024 0.039 -0.008 0.029 -0.004 0.020 -0.013 0.014 0.020 0.110 3-39

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 16 AQUATIC FLORA-FUCUS (PCI/G WET WT.)

COLLECTION LOCATION DATE AG- liOM 1-131 CS-134 CS-137 SB-125 TH-228

(+1-) (40/-) (4/-) (4@/-) (4@/-)

32X 03/11/03 -0.007 0.011 0.004 0.016 -0.005 0.009 -0.003 0.009 0.002 0.020 0.036 0.047 06/11/03 -0.024 0.020 -0.014 0.040 0.002 0.014 -0.002 0.013 -0.013 0.032 0.045 0.076 09/16/03 0.000 0.019 0.030 0.270 A -0.003 0.015 0.007 0.014 -0.007 0.033 0.011 0.055 12/03/03 -0.006 0.012 0.034 0.059 0.009 0.008 -0.005 0.008 0.011 0.016 0.057 0.029 33X 05/06/03 0.006 0.011 0.009 0.064 0.003 0.007 -0.007 0.009 0.007 0.017 0.002 0.030 10/22/03 -0.010 0.019 0.022 0.018 0.003 0.015 -0.006 0.015 0.009 0.031 0.080 0.071 35X 03/11/03 0.001 0.014 0.001 0.017 0.006 0.012 0.002 0.011 -0.002 0.020 0.068 0.048 06/10/03 0.002 0.015 0.012 0.035 0.007 0.014 -0.005 0.015 -0.003 0.027 0.034 0.067 09/16/03 -0.004 0.011 -0.060 0.120 A 0.004 0.008 0.006 0.008 0.013 0.015 0.043 0.030 12/03/03 0.007 0.013 0.005 0.060 0.002 0.011 -0.002 0.009 0 .019 0.019 0.069 0.035 36X 05/07/03 0.000 0.011 0.008 0.058 -0.007 0.008 0.002 0.008 -0.006 0.018 0.048 0.034 11/20/03 0.013 0.016 0.033 0.033 0.001 0.012 0.004 0.012 -0.026 0.028 0.051 0.044 39X 03/11/03 0.009 0.014 0.000 0.014 0.008 0.010 -0.005 0.009 -0.002 0.017 0.037 0.050 06/10/03 0.010 0.019 0.026 0.046 -0.003 0.018 -0.002 0.016 -0.002 0.035 0.113 0.076 09/16/03 0.002 0.012 -0.020 0.150 A 0.007 0.010 0.006 0.008 0.017 0.019 0.077 0.041 12/03/03 -0.013 0.016 0.078 0.088 -0.003 0.016 0.010 0.013 0.001 0.032 0.065 0.062 A: HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELING; NONCOMPLIANCE REPORT AND CR INITIATED.

340

Dominion Nuclear Connecticut, Inc. TABLE 17A Annual Radiological Environmental Operating Report 2003 Millstone Station FISH-FLOUNDER (PCI/a WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 Co-58 FE-59 (4/-) (4/-)

32 02/10/03 -0.05 0.25 4.02 0.79 -0.09 0.34 -0.033 0.034 0.020 0.035 0.034 0.082 05/20/03 -0.04 0.17 4.35 0.98 0.08 0.19 -0.006 0.023 -0.018 0.027 -0.023 0.052 08/26/03 -0.03 0.16 4.11 0.73 0.08 0.19 0.013 0.022 -0.011 0.016 -0.006 0.058 10/07/03 -0.06 0.23 4.29 0.95 -0.03 0.35 -0.011 0.028 0.017 0.038 -0.030 0.110 35 02/20/03 0.07 0.18 2.86 0.61 -0.01 0.24 0.002 0.022 -0.006 0.022 0.000 0.044 04/28/03 0.02 0.21 3.16 0.73 -0.18 0.24 0.003 0.023 -0.007 0.022 0.000 0.057 08/26/03 -0.10 0.15 3.39 0.68 -0.02 0.18 0.010 0.018 -0.011 0.024 0.008 0.062 10/07/03 0.05 0.27 3.49 0.85 -0.12 0.43 0.006 0.023 -0.004 0.028 0.060 0.130 COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 NB-95 RU-103 RU-106 (4/-) (4/-)

32 02/10/03 -0.003 0.033 -0.056 0.083 -0.038 0.054 0.001 0.037 -0.014 0.035 -0.26 0.31 05/20/03 -0.013 0.032 0.000 0.064 0.030 0.040 0.025 0.024 -0.010 0.022 -0.07 0.15 08/26/03 -0.012 0.026 0.028 0.047 0.003 0.034 -0.011 0.020 0.002 0.019 -0.01 0.19 10/07/03 0.033 0.030 -0.009 0.059 -0.018 0.064 -0.036 0.060 -0.008 0.040 0.05 0.20 35 02/20/03 0.009 0.024 -0.290 0.046 0.007 0.028 -0.010 0.025 0.010 0.023 -0.08 0.19 04/28/03 0.024 0.027 0.038 0.051 0.013 0.047 0.008 0.027 -0.014 0.025 -0.02 0.21 08/26/03 0.000 0.020 -0.012 0.050 0.011 0.036 -0.021 0.028 0.005 0.019 -0.05 0.18 10/07/03 -0.003 0.033 -0.032 0.069 0.026 0.068 -0.018 0.038 0.011 0.038 -0.12 0.26 COLLECTION LOCATION DATE AG-l1OM 1-131 CS-134 CS-137 SB-125 TH-228 (4/-) (4l/-) (4/-) (4/-)

32 02/10/03 -0.003 0.045 0.022 0.092 -0.020 0.036 0.014 0.032 0.034 0.086 0.010 0.130 05/20/03 -0.011 0.022 0.002 0.035 0.030 0.026 0.012 0.018 0.034 0.054 -0.004 0.094 08/26/03 0.013 0.030 -0.019 0.055 0.009 0.020 0.001 0.021 -0.007 0.048 0.021 0.080 10/07/03 0.037 0.035 -0.030 0.340 A 0.012 0.029 -0.003 0.018 0.024 0.048 -0.006 0.063 35 02/20/03 0.009 0.027 -0.022 0.079 0.013 0.020 0.019 0.016 -0.015 0.045 0.049 0.079 04/28/03 -0.015 0.031 -0.047 0.063 -0.014 0.022 0.018 0.027 0.010 0.052 0.059 0.092 08/26/03 0.006 0.028 0.030 0.038 -0.012 0.023 -0.020 0.021 0.047 0.055 -0.013 0.074 10/07/03 0.005 0.051 0.110 0.490 A -0.006 0.024 -0.024 0.023 -0.011 0.062 0.040 0.110 A: HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELINGy NONCOMPLIANCE REPORT AND CR INITIATED.

341

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 17B FlSH-OTHER (PCS/G WET WT.)

COLLECTION LOCATION DATE TYPE BE-7 K-40 CR-51 MN-54 Co-58 FE-59 (4/-) (4/-) (4/-) (+/-) (+/-)

32 A None 05/20/03 SKATE 0.13 0.18 2.53 0.73 -0.14 0.22 0.017 0.026 -0.008 0.023 0.000 0.043 08/26/03 SKATE 0.07 0.23 3.40 1.00 -0.03 0.18 0.015 0.015 -0.003 0.024 -0.038 0.089 10/01/03 BASS 0.01 0.25 3.82 0.71 0.07 0.39 0.010 0.021 0.011 0.027 -0.023 0.079 35 01/15/03 SKATE 0.05 0.34 2.21 0.61 0.25 0.54 0.002 0.030 0.040 0.037 -0.074 0 .099 04/28/03 SKATE 0.15 0.20 2.48 0.72 -0.01 0.21 0.011 0.025 -0.012 0.030 0.000 0.058 09/09/03 SKATE 0.03 0.10 2.30 0.39 -0.20 0.12 0.002 0.011 -0.002 0.013 -0.031 0.040 10/07/03 SKATE 0.10 0.25 2.38 0.69 0.33 0.33 -0.024 0.026 0.008 0.032 -0.010 0.110 4oX 03/21/03 BASS -0.07 0.21 3.71 0.68 -0.04 0.30 -0.013 0.024 -0.001 0.021 0.007 0.060 05/07/03 GIZZARD SHAD 0.15 0.18 2.79 0.82 0.14 0. 15 -0.001 0.027 -0.006 0.020 0.007 0.048 08/28/03 BASS 0.01 0.14 3.36 0.70 0.01 0.15 0.025 0.021 0.008 0.020 0.003 0.058 11/05/03 BASS 0.04 0.27 4.00 0.62 -0.41 0.47 0.007 0.019 0.015 0.029 0.020 0 .110 (A) AFTER SEVERAL ATTEMPTS, FISH (OTHER) WAS NOT AVAILABLE FOR SAMPLING COLLECTION LOCATION DATE TYPE CO-60 ZN-65 ZR-95 NB-95 RU-103 RU-106

________ ---------- __________ ____________-_ _ ___ _ /-)__ ___ _ ____4_-)

(4/-) (4/-) (/- )

32 A None 05/20/03 SKATE -0.005 0.019 -0.069 0.052 -0.005 0.035 0.019 0.024 -0.012 0.021 0.06 0.20 08/26/03 SKATE 0.003 0.036 -0.029 0.058 -0.006 0.046 0.024 0.040 0.018 0.023 -0.12 0.27 10/01/03 BASS -0.008 0.021 -0.034 0.051 0.005 0.053 -0.035 0.048 -0.015 0.035 -0.15 0.21 35 01/15/03 SKATE 0.005 0.026 0.004 0.071 -0.072 0.066 -0.021 0.060 0.033 0.051 0.03 0.28 04/28/03 SKATE 0.020 0.029 0.000 0.055 0.012 0.038 -0.001 0.030 -0.005 0.022 0.11 0.17 09/09/03 SKATE -0.008 0.012 -0.002 0.034 -0.003 0.024 -0.014 0.016 0.003 0.014 -0.08 0.14 10/07/03 SKATE -0.016 0.025 0.024 0.058 0.001 0.049 0.004 0.045 -0.004 0.039 0.21 0.22 40X 03/21/03 BASS 0.012 0.016 0.010 0.049 -0.017 0.038 0.020 0.033 0.012 0.025 0.17 0.18 05/07/03 GIZZARD SHAD -0.007 0.026 -0.031 0.043 0.020 0.048 0.020 0.021 0.007 0.019 -0.05 0.23 08/28/03 BASS -0.009 0.025 -0.032 0.056 -0.017 0.032 0.002 0.027 -0.014 0.022 -0.06 0.14 11/05/03 BASS 0.010 0.016 -0.031 0.051 -0.009 0.057 0.002 0.055 0.010 0.050 0.03 0.17 (A) AFTER SEVERAL ATTEMPTS, FISH (OTHER) WAS NOT AVAILABLE FOR SAMPLING 342

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 17B FISH-OTHER (PCI/G WET WT.)

COLLECTION LOCATION DATE TYPE AG-llOM 1-131 CS-134 CS-137 SB-125 TH-228 32 A None 05/20/03 SKATE -0.016 0.036 0.010 0.043 0.004 0.021 0 .019 0.025 0.000 0.056 0.040 0.110 08/26/03 SKATE -0.010 0.042 -0.001 0.039 0.028 0.028 0.011 0.027 -0.035 0.061 -0.050 0.120 10/01/03 BASS 0.0 0.031 -0.170 0.660 B 0.002 0.020 -0.002 0.020 0.032 0.050 -0.024 0.073 35 01/15/03 SKATE 0.003 0.037 0.260 0.790 B 0.042 0.030 0.004 0.032 0.042 0.079 0.120 0.140 04/28/03 SKATE 0.035 0.030 0.005 0.058 0.012 0.019 0.000 0.018 -0.016 0.052 0.022 0.079 09/09/03 SKATE 0.003 0.019 0.010 0.021 -0.009 0.012 0.003 0.013 -0.022 0.035 -0.015 0.051 10/07/03 SKATE -0.002 0.025 -0.350 0.330 B 0.000 0.026 0.003 0.018 0.016 0.064 0.049 0.081 40X 03/21/03 BASS 0.003 0.028 0.270 0.290 B 0.002 0.020 0.029 0.021 0.029 0.045 -0.062 0.072 05/07/03 GIZZARD SHAD 0.000 0.032 -0.013 0.027 -0.011 0.027 0.008 0.022 0.017 0.058 0.047 0.090 08/28/03 BASS 0.014 0.032 -0.001 0.042 0.005 0.025 0.002 0.017 0.011 0.041 0.003 0.080 11/05/03 BASS 0.000 0.029 -0.200 1.800 B 0.010 0.021 -0.003 0.019 0.003 0.042 0.013 0.073 A: AFTER SEVERAL ATTEMPTS, FISH (OTHER) WAS NOT AVAILABLE FOR SAMPLING B: HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELING; NONCOMPLIANCE REPORT AND CR INITIATED.

343

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 18 MUSSELS (PCI/G WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 CO-58 FE-59 4/- ) (4/-) ( 4 /-) (4-- /-)

28 03/27/03 A 06/16/03 0.06 0.21 1.06 0.53 0.00 0.23 0.005 0.021 0.014 0.028 -0.025 0.029 09/08/03 0.01 0.12 2.14 0.46 0.03 0.10 -0.003 0.016 0.020 0.016 0.025 0.057 12/23/03 -0.02 0.19 0.88 0.46 0.08 0.25 -0.014 0.018 -0.008 0.028 -0.058 0.068 30 03/12/03 -0.15 0.30 2.01 0.66 0.30 0.48 0.006 0.027 -0.003 0.035 -0.108 0.099 06/05/03 0.00 0.15 1.73 0.55 0.14 0.22 -0.015 0.016 -0.014 0.020 0.007 0.043 09/08/03 -0.11 0.12 1.52 0.42 0.04 0.13 -0.005 0.013 0.004 0.014 0.029 0.048 12/02/03 0.03 0.30 1.00 0.61 -0.04 0.47 -0.003 0.026 0.008 0.033 0.010 0.130 COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 NB-95 RU-103 RU-106 28______ ____________ ____________ ____________

(4/-) (4/-) (4@/-) (4l/-) (4/-)

28 03/27/03 A 06/16/03 -0.002 0.028 -0.016 0.055 0.017 0.044 -0.003 0.029 0.003 0.024 0.05 0.20 09/08/03 -0.011 0.017 -0.015 0.029 0.009 0.026 0.000 0.018 0.004 0.012 0.04 0.11 12/23/03 -0.006 0.023 -0.022 0.063 0.017 0.047 -0.013 0.030 -0.019 0.025 0.18 0.20 30 03/12/03 -0.003 0.031 -0.032 0.060 0.000 0.054 -0.030 0.043 0.013 0.042 -0.07 0.25 06/05/03 -0.010 0.025 0.000 0.040 0.007 0.042 -0.011 0.023 0.000 0.019 -0.06 0.20 09/08/03 0.005 0.019 -0.026 0.037 -0.005 0.024 -0.014 0.016 0.010 0.014 -0.03 0.13 12/02/03 -0.017 0.031 -0.008 0.071 -0.008 0.052 0.016 0.060 0.013 0.049 0.14 0.27 COLLECTION LOCATION DATE AG-110M 1-131 Cs-134 CS-137 SB-125 TH-228 (4--/-) ( 4/-) (4--/-)

28 03/27/03 A 06/16/03 -0.005 0.035 0.030 0.069 0.001 0.028 0.006 0.022 0.023 0.052 -0.024 0.098 09/08/03 -0.003 0.017 0.017 0.020 0.010 0.014 -0.001 0.015 0.013 0.035 -0.015 0.052 12/23/03 -0.012 0.032 -0.020 0.100 0.004 0.026 -0.008 0.028 -0.038 0.055 -0.020 0.096 30 03/12/03 -0.019 0.039 0.190 0.680 B -0.010 0.024 -0.007 0.027 -0.018 0.056 0.020 0.100 06/05/03 0.010 0.020 -0.037 0.068 -0.006 0.022 0.007 0.021 -0.021 0.051 -0.019 0.055 09/08/03 -0.006 0.020 -0.002 0.025 -0.007 0.017 -0.005 0.014 -0.014 0.036 -0.011 0.060 12/02/03 0.005 0.043 -0.130 0.670 B -0.005 0.029 0.004 0.029 -0.012 0.067 0.090 0.120 At AFTER SEVERAL ATTEMPTS, MUSSELS WERE NOT AVAILABLE FOR SAMPLING B: HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELINGy NONCOMPLIANCE REPORT AND CR INITIATED.

3-44

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 19 OYSTERS (PCI/Q WET WT.)

COLLECTION LOCATION DATE R-40 CR-51 MN-54 co-58 FE-S9 (4l/-) (4/-) (0/-) (4/-)

31 03/27/03 0.15 0.21 1.83 0.57 0.10 0.32 -0.012 0.021 -0.005 0.022 -0.008 0.055 06/19/03 00.25 0.27 1.40 0.70 0.00 0.28 0.004 0.027 -0.008 0.018 0.024 0.058 09/23/03 -0.02 0.25 1.90 0.60 -0.17 0.32 0.015 0.024 0.003 0.027 -0.018 0.063 12/12/03 0.05 0.17 1.68 0.64 0.00 0.42 0.018 0.026 -0.011 0.026 -0.038 0.082 32 03/26/03 0.16 0.19 2.29 0.65 0.02 0.28 0.011 0.023 0.003 0.024 -0.008 0.067 06/19/03 0.11 0.23 2.26 0.90 -0.16 0.26 -0.012 0.025 -0.007 0.033 0.014 0.062 09/18/03 -0.07 0.30 2.06 0.63 0.41 0.31 0.000 0.021 0.004 0.027 -0.060 0.100 12/10/03 -0.09 0.27 1.31 0.56 -0.27 0.39 -0.005 0.027 -0.024 0.028 0.020 0.110 34X 03/27/03 -0.01 0.14 1.55 0.39 0.09 0.22 -0.001 0.015 0.008 0.021 0.016 0.047 06/19/03 -0.03 0.21 1.63 0.65 0.05 0.22 0.012 0.023 0.000 0.023 -0.060 0.074 09/23/03 0.20 0.20 1.98 0.63 -0.02 0.29 -0.017 0.024 -0.006 0.026 -0.010 0.100 12/12/03 -0.39 0.26 1.26 0.63 -0.31 0.36 -0.017 0.033 -0.005 0.034 0.050 0 .100 36 03/25/03 0.02 0.25 1.49 0.53 -0.04 0.26 0.012 0.020 0.006 0.022 0.024 0.061 06/16/03 -0.12 0.25 1.70 0.67 0.07 0.25 -0.006 0.022 0.015 0.025 0.000 0.063 09/22/03 -0.64 0.41 2.06 0.75 -0.05 0.54 -0.024 0.042 0.010 0.050 0.020 0.140 12/16/03 -0.03 0.23 1.96 0.76 0.06 0.32 -0.011 0.020 -0.005 0.028 -0.010 0.100 37C 03/25/03 -0.01 0.18 1.32 0.41 -0.12 0.25 0.005 0.017 -0.004 0.019 -0.004 0.054 06/16/03 0.12 0.21 2.59 0.74 -0.03 0.19 -0.009 0.019 -0.001 0.028 0.025 0.060 09/22/03 0.02 0.23 1.62 0.49 0.18 0.30 0.000 0.019 -0.009 0.027 -0.072 0.074 12/16/03 -0.23 0.26 1.44 0.61 -0.09 0.29 -0.008 0.030 -0.037 0.034 0.011 0.070 40X 03/27/03 0.04 0.19 1.96 0.46 0.23 0.26 -0.016 0.017 0.000 0.021 -0.002 0.049 06/12/03 -0.02 0.25 1.24 0.61 0.22 0.30 0.012 0.024 0.003 0.026 0.028 0.057 09/22/03 0.16 0.31 1.84 0.73 0.29 0.44 -0.008 0.031 -0.016 0.024 0.010 0.110 11/03/03 -0.03 0.34 1.78 0.55 0.17 0.59 -0.020 0.027 -0.026 0.031 -0.010 0.120 60Z 04/23/03 -0.09 0.19 1.71 0.57 0.10 0.24 -0.002 0.020 0.000 0.021 -0.020 0.053 06/12/03 -0.19 0.18 1.90 0.56 0.13 0.24 0.006 0.021 0.002 0.019 -0.001 0.055 09/17/03 0.18 0.28 1.46 0.72 -0.26 0.36 0.012 0.024 0.014 0.035 0.071 0.082 12/10/03 0.14 0.25 1.75 0.70 0.16 0.37 0.001 0.022 -0.008 0.028 0.030 0.110 345

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 19 OYSTERS (PCI/G WET WT.)

COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 RU-103 RU-106 (4/-) (4@/-) (+/-) (4/-) (0/-) (4l/-)

31 03/27/03 0.001 0.026 -0.012 0.043 0.000 0.039 0.033 0.037 0.000 0.027 -0.01 0.17 06/19/03 -0.002 0.033 -0.022 0.055 0.049 0.070 0.020 0.030 0.004 0.029 -0.27 0.39 09/23/03 -0.007 0.021 -0.028 0.062 0.005 0.055 -0.031 0.040 0.015 0.027 -0.34 0.24 12/12/03 0.016 0.021 -0.054 0.071 0.027 0.056 -0.029 0.034 0.004 0.031 0.03 0.25 32 03/26/03 -0.015 0.032 -0.013 0.048 -0.014 0.050 0.008 0.031 0.003 0.025 0.13 0.13 06/19/03 -0.002 0.032 -0.013 0.059 -0.005 0.047 -0.011 0.036 0.005 0.027 -0.14 0.35 09/18/03 0.002 0.026 0.008 0.050 -0.015 0.055 -0.011 0.041 -0.017 0.033 0.07 0.17 12/10/03 0.012 0.026 -0.026 0.056 -0.012 0.055 0.020 0.058 0.026 0.040 0.17 0.26 34X 03/27/03 0.002 0.017 0.021 0.045 0.003 0.040 -0.013 0.028 -0.001 0.020 -0.03 0.14 06/19/03 0.021 0.028 -0.009 0.068 0.035 0.040 -0.007 0.029 0.006 0.024 0.12 0.22 09/23/03 0.023 0.026 0.021 0.062 -0.009 0.054 0.016 0.039 0.022 0.024 -0.17 0.21 12/12/03 0.010 0.021 -0.019 0.060 0.018 0.056 0.020 0.043 0.017 0.041 -0.06 0.19 36 03/25/03 0.006 0.020 0.025 0.055 0.015 0.043 -0.024 0.029 -0.010 0.027 0.02 0.19 06/16/03 0.001 0.030 -0.021 0.058 0.031 0.044 -0.002 0.026 -0.008 0.025 0.06 0.23 09/22103 -0.002 0.036 0.000 0.110 0.023 0.095 0.008 0.056 -0.013 0.064 0.32 0.37 12/16/03 0.008 0.030 -0.037 0.073 0.026 0.050 -0.011 0.033 0.004 0.028 -0.08 0.28 37C 03/25/03 -0.002 0.017 -0.002 0.040 0.003 0.038 -0.007 0.027 -0.013 0.028 -0.08 0.17 06/16/03 -0.016 0.022 0.032 0.045 -0.006 0.043 -0.014 0.022 0.003 0.021 -0.10 0.15 09/22/03 0.002 0.019 -0.098 0.053 0.027 0.041 0.017 0.038 -0.006 0.032 -0.01 0.19 12/16/03 0.011 0.027 -0.062 0.069 0.016 0.040 -0.062 0.049 -0.010 0.031 0.12 0.02 40X 03/27/03 0.008 0.015 -0.024 0.048 0.000 0.037 0.015 0.028 -0.006 0.023 0.07 0.16 06/12/03 0.004 0.023 -0.034 0.059 0.004 0.038 -0.018 0.036 0.003 0.028 -0.13 0.26 09/22/03 0.008 0.036 -0.069 0.076 -0.001 0.056 0.006 0.046 0.023 0.042 0.05 0.29 11/03/03 -0.002 0.019 -0.044 0.049 0.003 0.060 0.036 0.066 0.004 0.054 0.08 0.22 60Z 04/23/03 -0.016 0.023 -0.012 0.045 0.005 0.037 0.018 0.031 0.012 0.027 0.02 0.20 06/12/03 0.000 0.021 -0.051 0.054 0.004 0.039 -0.001 0.030 0.010 0.021 -0.11 0.19 09/17/03 -0.035 0.036 0.023 0.071 0.074 0.069 0.004 0.042 0.021 0.036 0.00 0.21 12/10/03 0.014 0.022 0.000 0.066 0.009 0.056 0.016 0.052 -0.041 0.038 0.08 0.20 346

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 19 OYSTERS (PCI/G WET WT.)

COLLECTION LOCATION DATE AG-110H 1-131 CS-134 CS-137 SB-125 TH-228 (4/-) (4/-) (4/-) (4/-) (+/-) (4/-)

31 03/27/03 0.010 0.025 -0.040 0.170 0.003 0.019 0.006 0.021 -0.009 0.056 0.001 0.079 06/19/03 0.019 0.039 -0.046 0.076 -0.015 0.027 -0.009 0.033 -0.061 0.079 0.030 0.110 09/23/03 -0.004 0.038 -0.310 0.240 A 0.000 0.027 0.006 0.023 -0.005 0.051 -0.055 0.082 12/12/03 -0.009 0.028 0.090 0.370 A 0.013 0.026 0.000 0.022 0.029 0.067 -0.052 0.080 32 03/26/03 -0.015 0.028 -0.140 0.180 -0.007 0.022 -0.004 0.023 -0.009 0.058 -0.018 0.079 06/19/03 0.000 0.042 -0.071 0.073 0.014 0.034 -0.004 0.033 0.038 0.066 0.069 0.100 09/18/03 0.052 0.043 -0.180 0.370 A -0.005 0.029 0.005 0.021 0.021 0.051 -0.033 0.069 12/10/03 0.123 0.037 -0.060 0.430 A 0.007 0.025 -0.043 0.082 -0.015 0.068 0.025 0.087 34X 03/27/03 0.000 0.022 -0.060 0.150 0.012 0.021 -0.003 0.014 0.025 0.041 0.045 0.057 06/19/03 O .004 0.027 0.017 0.085 -0.014 0.025 0 .010 0.020 -0.004 0.062 0.028 0.077 09/23/03 0.024 0.032 0.090 0.200 A 0.009 0.024 -0.006 0.021 -0.020 0.058 -0.008 0.093 12/12/03 -0.040 0.037 0.000 0.270 A 0.002 0.037 -0.003 0.029 0.000 0.060 0.110 0.100 36 03/25/03 -0.004 0.020 0.000 0.160 0.015 0.025 0.006 0.018 -0.017 0.046 -0.025 0.075 06/16/03 0.004 0.037 0.000 0.063 0.025 0.024 0.017 0.020 0.005 0.059 -0.030 0.091 09/22/03 0.016 0.052 0.020 0.420 A -0.009 0.033 -0.020 0.035 -0.020 0.091 0.040 0.160 12/16/03 0.016 0.034 0.120 0.270 A -0.004 0.027 0.015 0.032 -0.077 0.057 0.060 0.120 37C 03/25/03 0.000 0.024 -0.090 0.170 -0.005 0.016 0.001 0.014 -0.022 0.043 0.027 0.060 06/16/03 0.008 0.033 0.015 0.047 -0.012 0.030 -0.006 0.016 0.023 0.055 0.028 0.084 09/22/03 0.021 0.030 -0.070 0.240 -0.006 0.022 -0.008 0.021 0.004 0.044 0.010 0.068 12/16/03 -0.003 0.037 0.090 0.200 0.006 0.027 -0.008 0.021 0.005 0.059 0.037 0.087 40X 03/27/03 0.034 0.026 0.070 0.180 0.008 0.017 -0.030 0.022 0.027 0.042 0.034 0.067 06/12/03 0.048 0.056 -0.045 0.096 0.004 0.027 -0.041 0.031 -0.006 0.053 0.010 0.110 09/22/03 0.011 0.045 -0.270 0.340 A 0.009 0.036 -0.015 0.039 0.000 0.059 0.130 0.110 11/03/03 0.052 0.028 0.700 2.700 A 0.001 0.021 0.024 0.036 0.004 0.046 0.070 0.091 60Z 04/23/03 0.002 0.017 -0.038 0.099 0.009 0.020 0.007 0.025 -0.005 0.053 0.037 0.078 06/12/03 -0.006 0.028 -0.050 0.089 -0.009 0.020 -0.003 0.017 0.017 0.053 -0.064 0.077 09/17/03 -0.020 0.037 -0.070 0.450 0.008 0.024 0.011 0.023 0.008 0.059 0.150 0.100 12/10/03 0.008 0.032 0.120 0.400 0.025 0.022 0.009 0.020 -0.012 0.051 0.021 0.091 At HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELINGi NONCOMPLIANCE REPORT AND CR INITIATED.

TIME REQUIREMENT LESS STRINGENT FOR CONTROL LOCATIONS.

347

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 20 CLAMS (PcI/a WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 NN-54 Co-58 IE-59 (4@/-) (4/-) (0/-) (0/0) (.0/-)

29 2/3/03 -0.02 0.12 1.75 0.37 0.00 0.17 0.009 0.012 -0.013 0.013 -0.003 0.034 6/12/03 0.02 0.15 2.46 0.57 -0.07 0.22 0.000 0.*017 -0.006 0.007 0.037 8/6/03 0.00 0.14 1.75 0.50 -0.19 0.19 0.006 0.020 0.017 0.019 -0.005 0.037 11/3/03 -0.04 0.35 1.63 0.67 0.24 0.50 0.003 0.019 0.028 0.037 0.058 0.082 35X 3/25/03 0.00 0.18 1.69 0.49 0.02 0.26 -0.002 0.022 -0.020 0.016 0.000 0.054 6/12/03 0.02 0.22 2.07 0.64 0.19 0.26 -0.013 0.023 -0.005 0.022 -0.015 0.056 8/14/03 0.08 0.17 1.76 0.64 0.12 0.28 0.006 0.026 -0.005 0.019 -0.005 0.073 10/28/03 0.03 0.19 2.42 0.85 -0.13 0.28 0.002 0.030 0.018 0.033 -0.066 0.094 38 3/21/03 0.02 0.19 2.04 0.55 0.02 0.24 0.010 0.022 -0.014 0.021 -0.037 0.049 6/12/03 -0.02 0.02 2.43 0.73 0.01 0.23 -0.007 0.026 -0.014 0.023 -0.017 0.049 8/14/03 -0.03 0.21 2.16 0.76 -0.08 0.18 -0.006 0.021 0.017 0.028 0.010 0.092 10/28/03 0.00 0.26 1.92 0.92 0.22 0.32 0.002 0.023 -0.012 0.030 -0.028 0.099 39X 2/24/03 -0.02 0.15 1.86 0.39 -0.08 0.18 0.006 0.015 0.003 0.013 -0.019 0.038 6/10/03 -0.07 0.16 1.70 0.51 0.09 0.21 0.025 0.021 0.000 0.020 0.026 0.047 8/5/03 -0.10 0.14 1.71 0.51 0.01 0.15 0.004 0.016 -0.003 0.018 -0.011 0.045 12/2/03 0.04 0.17 1.45 0.43 -0.24 0.35 -0.003 0.018 0.001 0.020 -0.020 0.085 3.48

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 20 CLAMS (PCI/G WET WT.)

COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 NB-95 RU-103 RU-106

(./0) 29 2/3/03 -0.001 0.011 -0.032 0.032 0.009 0.023 -0.010 0 .019 -0.006 0.018 0.02 0.11 6/12/03 0.000 0.022 0.000 0.040 0.015 0.036 0.000 0.012 0.002 0.019 0.06 0.17 8/6/03 -0.002 0.019 0.024 0.051 -0.003 0.038 -0.014 0.020 -0.012 0.020 0.09 0.16 11/3/03 0.005 0.011 -0.011 0.070 -0.037 0.094 0.000 0.078 -0.020 0.062 0.12 0.19 35X 3/25/03 -0.003 0.023 -0.005 0.041 -0.004 0.043 -0.026 0.030 0.009 0.028 -0.09 0.22 6/12/03 -0.006 0.024 -0.020 0.055 -0.014 0.041 0.025 0.032 0.000 0.024 0.07 0.17 8/14/03 -0.007 0.029 -0.033 0.052 0.011 0.044 -0.009 0.029 0.000 0.025 -0.14 0.20 10/28/03 0.019 0.037 -0.024 0.075 0.040 0.054 0.008 0.033 0.016 0.028 -0.01 0.24 38 3/21/03 0.008 0.017 0.017 0.037 0.005 0.038 0.017 0.031 0.005 0.026 -0.05 0.14 6/12/03 0.002 0.028 -0.039 0.052 -0.031 0.045 -0.013 0.032 -0.008 0.030 0.05 0.15 8/14/03 -0.003 0.032 -0.019 0.060 0.001 0.052 -0.010 0.035 0.000 0.025 -0.06 0.20 10/28/03 -0.002 0.032 0.000 0.082 0.025 0.052 -0.014 0.040 0.027 0.031 -0.24 0.33 39X 2/24/03 -0.004 0.019 0.038 0.066 0.008 0.028 -0.002 0.021 -0.010 0.016 0.08 0.16 6/10/03 -0.011 0.022 -0.034 0.043 -0.034 0.037 -0.003 0.021 -0.007 0.018 -0.01 0.20 8/5/03 0.008 0.017 -0.016 0.046 0.020 0.030 0.006 0.023 0.016 0.018 -0.03 0.16 12/2/03 -0.009 0.019 -0.017 0.045 0.012 0.045 -0.007 0.037 0.007 0.026 -0.08 0.17 3.49

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 20 CLAMS (PCI/G WET WT.)

COLLECTION LOCATION DATE AG-110M 1-131 CS-134 CS-137 SB-125 TH-228 29 2/3/03 -0.008 0.019 0.023 0.072 -0.004 0.015 0.008 0.015 -0.043 0.032 0.002 0.055 6/12/03 0.005 0.022 0.041 0.077 -0.004 0.020 0.002 0.018 0.004 0.051 0.012 0.073 8/6/03 0.003 0.026 -0.029 0.044 -0.002 0.020 -0.010 0.021 0.004 0.047 0.038 0.067 11/3/03 -0.019 0.030 -0.700 2.500 A 0.001 0.030 0.000 0.027 -0.007 0.056 -0.099 0.097 35X 3/25/03 -0.009 0.022 -0.040 0.200 0.005 0.019 -0.002 0.020 0.000 0.046 0.036 0.073 6/12/03 0.012 0.028 0.031 0.082 0.008 0.024 -0.013 0.027 -0.021 0.060 0.001 0.083 8/14/03 0.038 0.042 -0.060 0.110 0.013 0.025 -0.025 0.031 0.082 0.070 0.020 0.100 10/28/03 -0.002 0.042 -0.029 0.061 -0.016 0.039 -0.013 0.033 0.008 0.045 -0.010 0.100 38 3/21/03 0.009 0.023 0.100 0.200 0.002 0.020 -0.008 0.017 0.000 0.043 0.013 0.064 6/12/03 0.029 0.034 0.019 0.079 0.003 0.027 -0.006 0.021 -0.011 0.047 0.015 0.073 8/14/03 0.007 0.023 0.040 0.100 -0.001 0.017 0.000 0.021 0 .000 0.063 -0.010 0.087 10/28/03 -0.015 0.046 -0.069 0.090 0.009 0.035 0.012 0.030 -0.075 0.075 -0.010 0.120 39X 2/24/03 -0.011 0.021 0.018 0.053 0.011 0.015 0.002 0.016 0.000 0.037 -0.041 0.054 6/10/03 -0.006 0.024 0.015 0.048 -0.003 0.018 0.002 0.021 -0.008 0.049 0.035 0.098 8/5/03 -0.022 0.021 -0.043 0.044 0.000 0.017 0.008 0.017 0.022 0.047 -0.019 0.058 12/2/03 -0.007 0.026 0.370 0.560 A -0.004 0.016 -0.020 0.019 0.009 0.041 -0.023 0.071 A: HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELING1 NONCOMPLIANCE REPORT AND CR INITIATED.

3-50

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 22 LOBSTERS (PCI/G WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 CO-58 FE-59 (4/-) (4/-) (4/-) (+/-) (05-)

32 03/04/03 -0.25 0.19 1.53 0.56 -0.13 0.19 -0.002 0.018 0.018 0.025 0.022 0.053 05/07/03 -0.03 0.18 2.21 0.55 -0.11 0.24 -0.021 0.024 -0.020 0.024 0.043 0.056 08/18/03 -0.04 0.18 1.44 0.50 0.22 0.26 -0.005 0.018 -0.016 0.025 0.063 0.076 10/17/03 0.07 0.26 1.82 0.65 0.25 0.34 -0.011 0.026 -0.008 0.025 0.011 0.072 35 03/14/03 -0.22 0.24 1.50 0.52 -0.16 0.29 0.009 0.016 -0.037 0.033 -0.019 0.065 05/07/03 -0.08 0.21 2.57 0.65 0.08 0.31 -0.500 0.029 -0.008 0.023 0.053 0.063 08/18/03 0.05 0.21 2.00 0.59 0.00 0.20 -0.007 0.022 0.003 0.022 0.038 0.075 10/17/03 0.11 0.24 2.63 0.64 0.00 0.30 0.004 0.026 -0.003 0.025 0.051 0.094 37X 03/17/03 0.02 0.23 1.65 0.56 0.19 0.33 -0.010 0.021 -0.004 0.027 -0.009 0.071 06/16/03 -0.08 0.16 2.37 0.58 0.26 0.20 0.000 0.020 -0.005 0.022 -0.034 0.048 08/22/03 0.08 0.19 2.70 0.71 0.16 0.23 0 .010 0.025 0.001 0.024 -0.037 0.060 11/04/03 -0.23 0.26 2.39 0.62 -0.54 0.62 0 .010 0.027 -0.019 0.020 0.170 0.130 COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 NB-95 RU-103 RU-106 (0/-) (09-) (4/-) (0/-) (4l/-)

32 03/04/03 -0.010 0.020 0.013 0.054 0.000 0.039 -0.003 0.025 -0.024 0.021 0.12 0.15 05/07/03 -0.003 0.021 -0.012 0.050 -0.023 0.031 -0.018 0.026 0.004 0.027 -0.07 0.18 08/18/03 -0.007 0.021 -0.008 0.061 0.038 0.043 0.014 0.026 -0.001 0.029 -0.07 0.18 10/17/03 -0.016 0.023 -0.083 0.091 -0.012 0.044 -0.030 0.042 -0.007 0.030 -0.02 0.18 35 03/14/03 0.024 0.019 -0.032 0.050 0.024 0.047 0.008 0.053 -0.025 0.036 -0.02 0.17 05/07/03 -0.011 0.029 -0.007 0.054 0.032 0.049 -0.029 0.035 0.000 0.026 -0.04 0.21 08/18/03 0.000 0.021 -0.069 0.054 -0.009 0.037 0.006 0.025 -0.015 0.025 0.08 0.16 10/17/03 0.025 0.027 0.005 0.053 -0.039 0.043 0.002 0.031 -0.014 0.029 0.10 0 .21 37X 03/17/03 -0.010 0.027 -0.037 0.058 -0.013 0.048 0.010 0.037 0.003 0.032 0.02 0.16 06/16/03 0.003 0.017 -0.013 0.054 -0.016 0.037 -0.018 0.028 0.004 0.027 -0.01 0.20 08/22/03 0.020 0.025 -0.019 0.052 -0.026 0.039 -0.011 0.034 -0.005 0.026 -0.01 0.24 11/04/03 0.003 0.023 -0.057 0.069 0.082 0.067 -0.026 0.050 0.022 0.049 -0.16 0.24 3-51

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 22 LOBSTERS (PCI/G WET WT.)

COLLECTION LOCATION DATE AG-110M 1-131 CS-134 CS-137 SB-125 TH-228

( / )

32 03/04/03 0.018 0.027 0.021 0.064 0.020 0.025 0.007 0 017 0.029 0.047 0.045 0 074 05/07/03 -0.014 0.030 -0.040 0.110 0.023 0.022 -0.180 0.018 0.053 0.049 0.022 0.077 08/18/03 0.018 0.031 0.084 0.074 -0.033 0.022 0.014 0.022 0.020 0.051 0.032 0.080 10/17/03 -0.019 0.030 -0.080 0.190 0.010 0.026 -0.001 0.028 -0.018 0.056 -0.020 0.100 35 03/14/03 -0.005 0.021 -0.010 0.390 A 0.003 0.020 0.004 0.014 0.039 0.047 0.040 0.075 05/07/03 0.000 0.041 -0.090 0.110 -0.001 0.022 -0.007 0.024 0.020 0.053 -0.027 0.082 08/18/03 0.007 0.026 0.003 0.077 -0.005 0.023 0.005 0.018 0.042 0.052 -0.037 0.054 10/17/03 0.013 0.027 -0.020 0.180 0.003 0.019 -0.004 0.021 -0.046 0.046 0.012 0.093 37X 03/17/03 0.007 0.024 0.060 0.350 A 0.006 0.022 0.005 0.023 -0.038 0.044 -0.051 0.073 06/16/03 -0.009 0.027 0.036 0.064 0.000 0.019 -0.008 0.018 -0.030 0.047 0.020 0.076 08/22/03 0.000 0.023 -0.040 0.077 -0.002 0.023 -0.014 0.024 0.029 0.055 -0.003 0.071 11/04/03 -0.011 0.031 -1.700 2.800 A 0.011 0.027 0.000 0.026 0.039 0.057 -0.014 0.077 AS HIGH ERROR DUE TO INADEQUATE VENDOR SCHEDUELING5 NONCOMPLIANCE REPORT AND CR INITIATED.

3-52

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

4. DISCUSSION OF RESULTS This section summarizes the results of the analyses of environmental media sampled. DNC has carefully examined the data throughout the year and has presented in this section all cases where station related radioactivity could be detected. The results are compared with previous environmental surveillance data. Few impacts of the station operation on the environment were observed. Sub-sections contain a description of each particular media or potential exposure pathway.

Naturally occurring nuclides such as Be-7, K-40, and Th-228 were detected in numerous samples. Be-7, which is produced by cosmic processes, was observed predominantly in airborne and vegetation samples. Th-228 results were variable and are generally at levels higher than plant related radionuclides.

Cs-137 and Sr-90 were observed at levels similar to those of past years.

The levels of Cs-137 and Sr-90 detected were the result of atmospheric nuclear weapons testing in the 1960's.

4.1. Gamma Exposure Rate (Table 1)

Gamma exposure rate is determined from the integrated exposure measured over a quarter using CaSO 4 (Tm) Panasonic model UD-804 ASx thermoluminescent dosimeters (TLDs). In 2000, the TLDs (Victoreen glass bulb CaF2 (Mn)), which historically were used to measure radioactivity around Millstone for over 20 years, were replaced with the Panasonic TLDs. The new Panasonic dosimeters have a lower response than the Victoreen dosimeters. Results from 2000 through 2003 show a 15% to 20% lower response when compared to trended results for previous years. This lower response is consistent for all locations, including both indicator and control locations.

The dosimeters are strategically placed at a number of on-site locations, as well as at inner and outer off-site locations. Starting in 2001, the collection of TLDs was changed from monthly to quarterly and additional measurement locations were incorporated into the REMODCM. Three more locations were added in mid-2003 to prepare for monitoring the potential effect of ISFSI (Independent Spent Fuel Storage Installation - Dry Cask Storage).

Table 1 lists the exposure rate measurements for all 44 monitored locations. Trends similar to those of past years are apparent.

These measurements demonstrate the general variations in background radiation between the various on-site and off-site locations and include gamma exposure from all sources of radioactivity. For example, the Weather Shack (location 02), MP3 4-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Discharge (location 05), Environmental Laboratory (location 08),

and Corey Road (location 48) experience higher exposure rates due to their proximity to granite beds and stonewall fences. In addition, the Ledyard control location (location 14C) experiences relatively higher background exposure rate than the other control locations at Mystic, Norwich, and Old Lyme (locations 13C, 15C, and 16C). The only appreciable effect seen in the TLD data is that attributable to the variation in the background radiation that Is consistent with previous years.

Figure 4.1-1 shows a historical trend of TLD exposure rate measurements, comparing an annual average of all indicator TLDs, an annual average of all control TLDs, and the annual average of the two most critical indicator locations which are used to represent the two closest site boundary residences in the North-northwest and Northeast directions. Examination of the average measurements since 1990, shows interesting site changes and site characteristics. For example, the average of all indicator locations for the period when Unit 1 was still in operation (through 1995) display the effects of N- 16 BWR turbine building sky-shine to immediate areas onsite. As discussed in previous annual reports, the effects of sky-shine at onsite monitoring stations were increases as high as 6 uR/hr at certain onsite locations. Sky-shine decreased rapidly with distance and was indistinguishable from normal background measurements at even the nearest offsite monitoring stations. Also apparent in Figure 4.1-1 is the replacement of the historical Victoreen TLD monitoring system with the Panasonic system in year 2000. The difference in response between the two systems is very apparent, with the new Panasonic TLDs reading 15% to 20% lower. The figure also relates the difference in critical indicator locations (1) and (3) and the annual average of all indicator TLDs to the annual average of the control TLDs collected and measured during coincident periods throughout the year. The exposure measurements of many indicator locations onsite are influenced by natural background exposure differences caused by the many granite out-croppings typical of the Millstone area. Historical data evaluation has shown that TLD sample locations in the vicinity of granite can be dramatically affected by natural radioactivity contained within the granite. As shown in Figure 4.1-1, the annual average of the indicator TLDs and one of the critical indicator locations are slightly higher in gamma exposure rate than the average control gamma exposure rate. This difference is the result of the nearby granite. For conservatism, if the difference was the result of plant operation (e.g., storage of radioactive waste on-site, gaseous effluents, etc.) an assessment of the resulting dose consequence, 4-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station assuming constant year-round residency, is shown in Section 5 as not exceeding 4.5 mrem.

4.2. Air Particulate Gross Beta Radioactivity (Table 2)

Air is continuously sampled at one outer ring and seven inner ring locations by passing it through glass fiber particulate filters. These are collected weekly and analyzed for gross beta radioactivity.

Results are shown on Figure 4.2-1 and Table 2. Gross beta activity remained at levels similar to that seen over the last decade.

Inner and outer ring monitoring locations continue to show no significant variation in measured activities (see Figure 4.2-2). This indicates that any station contribution is not measurable.

4.3. Airborne Iodine (Table 3)

Charcoal cartridges are included at all of the air particulate monitoring stations for the collection of atmospheric iodine. These cartridges are analyzed on a weekly basis for I-13 1. No detectable levels of I- 131 were seen in the 2003 charcoal samples.

4-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 4.2-1 pCi/m3 MILLSTONE AIR PARTICULATE 0.035 -2003 Gross Beta Radioactivity

+ Indicators 0.035I~o~

- Controls 0.035 0.025 -X < A=

0.02 1r /

0.015 ,

0.01 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Figure 4.2-2 MILLSTONE AIR PARTICULATE pCi/m3 5 Year Historical Gross Beta Radioactivity 0.035 -

+indicators]

Controls 0.03 -

0.025 -

0.02 0.015 0.015 w 2 5 a C 2 9 Z

• 2 COZ C Z O

( Z (NC z -, 2 z 44 CoL -

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.4. Air Particulate Gamma (Table 4A-D)

The air particulate samples that are utilized for the weekly gross beta analyses are composited and analyzed quarterly for gamma emitting isotopes. The results, as shown in Tables 4A - 4D, indicate the presence of naturally occurring Be-7, which is produced by cosmic processes. No other positive results were seen. These analyses indicate the lack of station effects.

4.5. Air Particulate Strontium (Table 5)

Table 5 in past years was used to report the measurement of Sr-89 and Sr-90 in quarterly composite air particulate filters. Because previous data has shown the lack of detectable station activity in this media, the requirement for these measurements was removed from the Radiological Effluent Monitoring Manual (REMM) and analyses have been discontinued. The fact that milk samples are a much more sensitive indicator of fission product existence in the environment, prompted the decision for discontinuation. In the event of widespread station related contamination or special events such as the Chernobyl incident, these measurements may be made. Historically, when world events created conditions that caused detectable measurements of these nuclides, no difference was noted between indicator and control locations. This further confirms that these detectable levels were not plant related.

4.6. Soil (Table 6)

Millstone resumed collection of soil as a required media type in 2001. Prior to then, it had not been sampled for over fifteen years, largely due to the fact that, when it was previously sampled, no detectable station activity was observed. No station detectable activity is seen in soil samples taken in 2003. The results of these samples will allow the determination of baseline activity levels in soil. These will be developed for isotopes, such as Cs-137, that are the result of past weapons testing fallout. Baseline levels will prove useful years from now when site characterization and decommissioning of the station become the focus after License termination. This media is collected quarterly from one control and two indicator locations.

4-5

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.7. Cow Milk (Table 7)

The most sensitive indicator of fission product existence in the terrestrial environment is usually milk samples. This, in combination with the fact that milk is a widely consumed food, results in this pathway usually being the most critical.

Unfortunately, since 1996 all dairy (cow) farms close enough (i.e.

within 10 miles) to Millstone to be considered an indicator location have been out of business. Therefore, the sampling of cow milk has been discontinued until such time that a new dairy farm goes into business. Each year a Land Use Census Is used to identify locations of milk animals that should be included in the monitoring program. It Is performed annually and is maintained by observations, door-to-door surveys and consulting with local agriculture authorities. The 2003 census can be seen in Appendix A. If a new dairy farm is identified within a distance from Millstone to be considered an indicator location, the collection of cow milk will resume.

4.8. Goat Milk (Table 8)

Each sample is analyzed for 1-131 and gamma emitting nuclides.

Strontium analysis frequency is quarterly. The samples collected within each quarter from each sample location are composited and analyzed at the end of each quarter.

Goat milk samples can be a more sensitive indicator of fission products in the terrestrial environment than cow milk samples.

This is dependent on a number of parameters, including:

metabolism of these animals, feeding habits, and feed type. As in past years, Cs-137 and Sr-90 were observed in goat milk. During past weapons testing periods, samples taken at certain milk locations indicated higher uptake of fallout than others. This was especially apparent in past samples collected in the immediate area around Millstone (see previous Annual Operating Reports).

One of these sites, location 22 (5.2 Mi. NNE, sampled only since 1994), exhibits this trend showing higher Sr-90 and Cs- 137 concentrations. Their presence is the result of residual radioactivity deposited into the environment from past nuclear weapons testing fallout. The facts that lead to this conclusion are presented in Section 6.0, and include: effluent release totals for these isotopes show insufficient quantities to account for such measurements; Sr-89 and Cs-134 which are chemically similar and generally released in comparable quantities were not detected, and a trend since the early 1960's that shows a consistent declining presence of Cs-137 and Sr-90 in milk from Connecticut.

4-6

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station The results indicate no detectable I-131 in this media. For over 15 years, no plant related detectable levels of I-131 have been seen in goat milk samples. The only other occasions where I-131 was detected were the Chinese Weapons Tests of the mid to late 1970's and the fallout from Chernobyl.

Goat milk was unavailable at all locations both early and late in the year. Per requirements, pasture grass or feed is collected as a substitute when milk cannot be collected (see 4.9. Pasture Grass and Feed).

4.9. Pasture Grass and Feed (Table 9)

When the routine milk samples are unavailable, samples of pasture grass are required as a replacement. These samples may also be taken to further investigate the levels of radioactivity in milk. During the winter months and early spring, insufficient growth prohibits sampling of pasture grass as a replacement sample. Feed (e.g., hay) may be sampled whenever pasture grass is unavailable.

No station effects were seen in pasture grass and feed samples.

Cosmic produced Be-7 was observed in the majority of the pasture grass samples and the fourth quarter hay samples. Due to its relatively short half-life (52 days), it was not detected in the first quarter hay samples. Similar to that observed in goat milk, the Cs-137 values at indicator and control locations are comparable and would indicate that the levels observed are the result of residual weapons testing fallout.

4.10. Well Water (Table 10)

Millstone resumed collection of well water as a required media type in the fourth quarter of 2003. Prior to then, it had not been sampled since 1985, largely due to the fact that when it was previously sampled, no detectable station activity was observed.

No station detectable activity is seen in the well water samples taken in 2003.

4-7

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.11. Reservoir Water (Table 11)

Reservoir water samples are special samples not required by the REMM. Previous data has shown the lack of detectable station activity in this media. This fact and the extremely unlikely possibility of observing routine station effluents in this media have resulted in discontinuing these samples. In the event of widespread station related contamination, these samples may be collected.

4.12. Fruits and Vegetables (Table 12)

Consistent with past years, this media did not show any station effects. Cosmic produced Be-7 was noted in the two indicator lettuce samples. Naturally occurring K-40 was detected in all samples.

4.13. Broad Leaf Vegetation (Table 13)

Consistent with past years, this media did not show any station effects. Most samples had detectable levels of cosmic produced Be-

7. Positive indications of Cs-137 were observed in two samples.

The levels are comparable to those observed in past years and is due to fallout.

This media can be an early and sensitive indicator of releases from the station from both unplanned releases and normal operations.

Therefore, to enhance program-monitoring effectiveness, samples of broadleaf vegetation are collected monthly during the growing season, April - October, even though requirements are to collect twice a year.

Due to a minor fuel pin failure in Unit 2, higher concentrations of iodine were measured in the unit's gaseous effluent discharge pathways during periods when the unit was shutdown. At no time during the year did any samples that would be used to detect iodine in the environment (i.e., air iodine samples, goat milk or broadleaf vegetation) show any detectable I- 131.

4-8

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.14. Seawater (Table 14)

Seawater samples from the vicinity of discharge (32) are continuous composites collected monthly. Samples from Giants Neck (37C) are quarterly composites of weekly grab samples.

Millstone increased the required sampling frequency for composite samples from the vicinity of discharge to a monthly basis to increase monitoring effectiveness. In 2003, the LLD for H-3 was lowered by approximately a factor of four to further enhance monitoring effectiveness.

Naturally occurring K-40 was seen in all samples. Measured plant related levels of H-3 inseawater from the immediate vicinity of discharge (location 32) have been observed throughout the operation of Millstone's nuclear units. This sample is taken directly from liquid effluent flow prior to dilution into Long Island Sound. Dilution studies performed on this discharge have determined that a dilution factor of 3 is appropriate to estimate concentrations immediately outside the quarry within a near-field area. After dilution, the concentration of tritium expected in the immediate area of the Sound would approach undetectable levels, even at the "enhanced" LLD.

Tritium builds up in the reactor coolant in each fuel cycle. It is generated during operation from fission and neutron reactions.

For approximately the last 10 years, H-3 has typically been below detectable levels because of the change in analysis technique.

Figure 4.14-1 shows a ten-year trend of tritium releases in Millstone liquid effluents versus measured environmental concentrations from the vicinity of discharge location. As can be noted from the figure, since the restart of Unit 3 in 1998 and Unit 2 in 1999, tritium releases in liquid effluents have risen to levels at or above those observed during the pre-shutdown period. A review of previous year's trends indicated that lowering the LLD for tritium for location 32 could make an enhancement to the program. The lower LLD enables a direct comparison of effluent monitoring to environmental monitoring. Figure 4.14-2 shows this comparison.

4-9

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 4.14-1 MILLSTONE LIQUID H-3 RELEASE VERSUS SEAWATER CONCENTRATION 1700-_,..

1600 10 Year Historical Trend 1500 u 1400 pCi/liter 1300 -

1200 -

1100 /

1000-900 800 700 600 500 __ Il\ I S4oo 400  ! t l A -LA 11 P \ a 300 V A - \ W I 200 m L X 100 0) 0) 0 ) 0) 0)

0) 0) 0 0)

C CC 0) ) 0 0 0 0 0 a, M J U)

M 10 CD CD M _, - CD 0 C 0 0 _ _ N N C C a aa a a aa aa a a aa aa a aaa a aa Figure 4.14-2 MILLSTONE Seawater - Tritium 2003 Samples vs. Effluent Measurements 1000 800 600 pCi/l 400 200 0 , I i Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 4-10

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.15. Bottom Sediment (Table 15)

Similar to last year, Cs-137 was detected in the samples from Golden Spur (67X). The Golden Spur area is a fresh water area and the levels of Cs-137 at this location are comparable to those observed in past river water sediments taken from up the Connecticut River. Due to this and the relative distance and direction of the Golden Spur location, the Cs-137 detected at Golden Spur is not plant related.

Cs-137 was also detected in the extra sample from Jordon Cove Bar (39X1 in the third quarter. Co-60 was detected in the sample from the Vicinity of Discharge (32) in the third quarter. Both nuclides were also detected last year at these locations. These levels are considered plant related activity, which has not been detected in bottom sediment for over a decade. The levels detected are comparable to the levels observed in 1990. Bottom sediment is not a dose pathway to man and therefore the presence of radioactivity in bottom sediment does not pose any dose consequences. Examinations of aquatic media sampled from the same sampling locations (discussions that follow) do not show any detectable Co-60 or Cs-137.

4.16. Aquatic Flora (Table 16)

Sampling of this media provides useful information because it is very sensitive to station discharges. However, similar to the last several years, no station related radioactivity was detected in aquatic flora in 2003.

4.17. Fish (Tables 17A and 17B) 4.17.1. Flounder (Table 17A)

The activity in Flounder is the same as that seen for the past decade. No activity was observed except for the naturally occurring radionuclides.

4.17.2. Fish - Other (Table 17B)

The activity in other fish is the same as that seen for the past decade. No activity was observed in this media except for naturally occurring radionuclides, including samples taken from within the quarry.

4-11

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station 4.18. Mussels (Table 18)

Similar to the last several years, this sampling media showed no station related radioactivity at all locations.

4.19. Oysters (Table 19)

All locations, except for the quarry, utilize stocked oysters. These oysters have been obtained from location 68Z for the last several years. To enhance the program, the oysters from location 68Z have also been analyzed. Trays are kept at most sampling areas to guarantee samples and facilitate sample collection. Native oysters are sampled at the quarry (location 40X), which is an extra location.

Station related Ag-i lOim was observed in only two of the samples from within the station discharge area (locations 32 and 40X).

Typically, the quarry oysters show the highest activity; however, the trend is just the opposite for 2003. Although location 32 is labeled as the vicinity of discharge, it is actually at the end of the quarry. No station related activity was observed in samples from beyond the station discharge area.

In years past, high levels of Zn-65 were typically observed In oysters caused by their distinct capacity to accumulate zinc.

Studies have shown that oysters can accumulate as much as 50 times or more the amount of zinc compared to most other seafood (Wolfe, 1979). A remarkable dependency exists between the Zn-65 concentration measured in the native quarry oysters and the amount of Zn-65 discharged into the environment. However, since the permanent shutdown of Millstone Unit 1 in 1996, the discharges of Zn-65 in liquid effluents have dropped to no detectable activity in station discharges. Starting in 2001, no Zn-65 has been released in liquid effluents and no Zn-65 has been detected in oysters. Figure 4.19-1, shows the historical trend that existed between Zn-65 releases and measured concentrations in quarry oysters. The decreasing trend in effluent radioactive releases is apparent in both the curies released and the measured concentrations in oysters.

Figure 4.19-2 shows a similar trend of Ag-l lOnm concentration in quarry oysters compared with liquid effluent curies of Ag-l lOm discharged. Again, the dependency between Ag-l lOnm discharged and the Ag-liOm concentration measured in the native quarry oysters is apparent. The historical sensitivity between station 4-12

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station measured effluent discharges of Zn-65 and Ag-I 1Om when compared to environmental measured concentrations has provided a basis for Millstone to adjust the bioaccumulation factors for Zn-65 and Ag-il10m used in the standard industry effluent dose consequence codes. See Section 5 of this year's and previous years' Annual Radiological Environmental Operating Reports for a comparison of the two methods which has allowed for such adjustments in the past (i.e., dose from the station's measured radioactive discharges input into conservative models versus actual measurements of the concentrations of radioactivity in environmental media to calculate annual dose commitment from consumption).

Because no station activity was observed at locations beyond the station discharge area and since the two locations in the quarry are on-site and not available for public use, the actual concentration of radionuclides in oysters available for public consumption is much less. The near-field dilution factor for liquid discharges from the Millstone quarry discharge is a factor of 3.

The dose consequence of the station related radioactivity via this pathway is discussed in Section 5.0.

4.20. Clams (Table 20)

Occasionally this media indicates the presence of station related radioactivity. No station related radioactivity was observed in any of the clam samples taken in 2003.

4.21. Scallops (Table 21)

Scallops are not required by the REMM. However, attempts are made to sample this media to confirm station effects because scallops are available for public consumption. No scallop samples were available in 2003.

4.22. Lobsters (Table 22)

Like the last several years, no station related radioactivity was detected in this sample media in 2003.

4-13

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 4.19-1 Zn-65 COMPARISON Curies Curies Discharged vs. Native Oyster Conc. Conc. (pCi/gram) 0.1 t C \. l Curies Dischargedl 1WV 0.01 10 0.001 0.0001 Co C Co OCC C C CC C C OysterC c .

0.1 0.00001 0.01 0.000001 0.001 a a a a a a a a a a a a a a a a a a__

Quarter Figure 4.19-2 Ag-ll0m COMPARISON Curh Is Curies Discharged vs. Native Oyster Conc. Conc. (pCi/gram) 0.1 100

+Curies Discharged 0.01

'iY

^ ^ - ^ ^

AA- lS X t l _ Oyster Conc.

10 I.WZS 0.001 II i

U i _ - 1 0.0001 lt w *6 NM 0.1 0.00001 0.01 0.000001 Co Co a

I..

a C

Co

. 0 a

CC a

CC a

CC C

MN CC C C

CC C O

C N

C wC CC CC C 0 0

0

(

0 C

0.001 a a a a a a a a a a a Quarter 4-14 co&

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

5. OFFSITE DOSE EQUIVALENT COMMITMENTS The off-site dose consequences (dose equivalent commitments) of the stations' radioactive liquid and airborne effluents have been evaluated using two methods.

The first method utilizes calculations of direct dose from sources onsite and the stations' measured radioactive discharges as input parameters into conservative models to simulate the transport mechanism through the environment to man. This results in the calculation of the maximum dose consequences to individuals. The results of these computations have been submitted to the NRC in the Radioactive Effluent Release Report written in accordance with the Radiological Effluent Monitoring Manual,Section I.F.2. This method, which is usually conservative (i.e., computes higher doses than that which actually occur), has the advantage of approximating an upper bound to the dose consequences. This is important in those cases where the actual dose consequence cannot be measured because they are so small as to be well below the capabilities of conventional monitoring techniques.

The second method utilizes the actual measurements of the concentrations of radioactivity in various environmental media (e.g., fish, shellfish) and then computes the dose consequences resulting from the consumption of these foods.

The results of both methods are compared in Table 5.1 for those pathways where a potential dose consequence exists and a comparison Is possible.

The doses presented in this table are calculated at the location of maximum effect from the station effluents for that pathway and for the critical age group. For example, the external gamma dose from gaseous effluents is calculated for the site boundary location which is not only the nearest but also has the greatest directional wind frequency and fish and shellfish doses are calculated assuming they are from an area within 500 feet of the station discharge.

Summarizing the data in Table 5.1:

MAXIMUM TOTAL INDIVIDUAL DOSES:

WHOLE BODY = 0.07 mrem GI(LLI) = 0.013 mrem The organ GI(LLI) dose is essentially all attributable to the liquid pathway.

Nearly half of the whole body dose is due to a conservative determination of dose (-0.034 mrem) to the nearest resident as a result of direct radiation from on-site radioactive waste operation/storage facilities and continuous occupancy. The whole body and maximum organ dose attributable from station effluents includes conservative assessments using Method 2.

5-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Since the maximum dose consequence to an individual is at the location of highest dose consequence, doses will be less for all other locations. The average whole body dose to an individual within 50 miles historically is on the order of 1000 times less than the maximum individual whole body dose.

In order to provide perspective on the doses in Table 5.1, the standards for 2003 on the allowable maximum dose to an individual of the general public are given in 40CFR190 as 25 mrem whole body, 75 mrem thyroid, and 25 mrem to any other organ. These standards are a fraction of the normal background radiation dose of approximately 284 mrem per year and are designed to be inconsequential in regard to public health and safety. Since station related doses are even a smaller fraction of natural background, they have insignificant public health consequences. In fact, the station related doses to the maximum individual are less than 10% of the variation in natural background in Connecticut.

5-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 5.1 COMPARISON OF DOSE CALCULATION METHODS MILLSTONE POWER STATION 2003 Annual Dose (millirem)

Method 1 (1) Method 2 Pathway Individual Organ Unit 1 Unit 2 Unit 3 Station Station (BWR) (PWR) (PWR) Total irborneEffluents

1. External Gamma Max( 2) Whole Body 0.0019 0.016 0.012 0.030 ND(7)

Dose Direct Dose Nearest Residence Max( 2) Whole Body N/A N/A N/A -0.034(4) <4.5(5) 5-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 5.1 (Cont.)

COMPARISON OF DOSE CALCULATION METHODS MILLSTONE POWER STATION 2003 Annual Dose (millirem)

Max Method 1(1) Method 2 '

Pathway Individual Organ Unit 1 Unit 2 Unit 3 Station Station (BWR) (PWR) (PWR) Total Liquid Effluents (9)

1. Fish

• Adult Whole Body - 0.00024 0.00038 0.0027 ND(3 )

Teen - 0.00015 0.00034 0.0018 Child - 0.00079 0.00037 0.0012

• Adult GI(LLI)( 6) - 0.0035 0.00080 0.0043 ND Teen it - 0.0025 0.00061 0.0031 Child It - 0.0009 0.00031 0.0013 Adult Liver - 0.0036 0.00092 0.0018 ND

• Teen - 0.0037 0.00093 0.0018 Child - 0.0034 0.00088 0.0016

2. Shellfish

• Adult Whole Body - 0.00076 0.00033 0.0011 0.000005(8)

Teen of - 0.00064 0.00034 0.0010 0.000005 Child do - 0.00063 0.00043 0.0011 0.000005

• Adult GI(LLI) - 0.0072 0.00088 0.0081 0.0031(8)

Teen - 0.0050 0.00069 0.0057 0.0021 Child ,, - 0.0018 0.00030 0.0021 0.0008 Adult Liver - 0.00135 0.00117 0.0025 0.000008(8)

• Teen - 0.00140 0.00124 0.0027 0.000008 Child - 0.00135 0.00126 0.0026 0.000006 54

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Notes:

1. Except for direct dose, method 1 uses measured station discharges and meteorological data as input parameters to transport-to-man models that conservatively calculate dose to people; method 2 uses actual measured concentrations in environmental media to estimate the dose.

2. Maximum individual - The maximum individual dose is the dose to the most critical age group at the location of maximum concentration of station related activity. The dose to the average individual is much less than the maximum individual dose.

3. ND - Not Detectable - No station related activity could be detected above natural background or above the minimum detectable level (MDL).

4. The dominant source of direct dose from the station is from operation/storage of radioactive waste facilities. Storage of radioactive waste in areas designated onsite is limited by design and operation to ensure that the maximum direct dose from each area at the site boundary does not exceed one millirem. Actual exposure from each throughout the year was maintained much less than this operational limit.

Each facility is monitored onsite by the Radiation Protection Department using TLDs. The exposure measured for each facility TLD was corrected for distance to the nearest site boundary residence. The resultant exposure was conservatively multiplied by 1.5 to account for skyshine. These maximum estimated doses from each facility were summed for a cumulative site commitment of approximately 0.034 millirem.

5. Measured dose was derived from monthly TLD readings. There are two residences that qualify as the closest residence, each has a TLD near enough to use as an estimate to each residence. The one with the highest average dose rate was used to estimate the direct dose to the closest residence. A background dose rate was subtracted. This background was derived from the average of the five control TLD locations. This method is very conservative assuming natural exposure influences, such as granite, are actually plant related exposure. This method provides a bounding high value. The exposure measurements of the select indicator locations are influenced by natural background exposure differences caused by the many granite out-croppings typical of the Millstone area. Historical data evaluation has shown that TLD sample locations in the vicinity of granite can be dramatically influenced by natural radioactivity contained within the granite.

6. GI (LLI) - Gastrointestinal Tract - Lower Large Intestine.

7. ND - Not Detectable - measurements for 2003 show no detectable station related activity. TLD's cannot detect levels that are such a small fraction of natural background.

8. Based on measured levels in vicinity of discharge and quarry oysters. A measured near field dilution factor of 3 was used to adjust for the fact that these oysters are on-site and inaccessible to the public. This factor adjusts the measured on-site concentration to that which could occur to a public accessible off-site location after dilution of the effluent by the Long Island Sound.

9. There were no liquid discharges from Unit 1 in 2003.

5-5

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station

6. DISCUSSION The evaluation of the effects of station operation on the environment requires the careful consideration of many factors. Those factors depend upon the media being affected. They include station release rates, effluent dispersion, occurrence of nuclear weapons tests, seasonal variability of fallout, local environment, and locational variability of fallout. Additional factors affecting the uptake of radionuclides in milk include soil conditions (mineral content, pH, etc.), quality of fertilization, quality of land management (e.g., irrigation),

pasturing habits of animals, and type of pasturage. Any of these factors could cause significant variations in the measured radioactivity. A failure to consider these factors could cause erroneous conclusions.

Consider, for example, the problem of deciphering the effect of station releases on the radioactivity measured in milk samples. This is an important problem because this product is widely consumed and fission products readily concentrate in this media. Some of these fission products, such as I-131 and Sr-89 are relatively short-lived. Therefore they result from either station effluents, nuclear weapons tests or nuclear incidents (e.g. Chernobyl). Sr-89's lifetime is longer than 1-131's, therefore it must be remembered that it will remain around for much longer periods of time. Problems are caused by the long-lived fission products, Sr-90 and Cs-137. These isotopes are still remaining from the high weapons testing era of the 1960's. This results in measurable amounts of Sr-90 and Cs-137 appearing in milk samples.

Distinguishing between this "background" of fallout activity and station effects is a difficult problem.

In reviewing the historical and present Sr-90 and Cs-137 measured in cow and goat milk in the areas around Millstone station, a casual observer could notice that in some cases the levels of these isotopes are higher at farms closer to the station than at those further away from the station. The station's effluents might at first appear to be responsible. However, the investigation of the following facts proves this conclusion wrong.

(1) The stations accurately measure many fission products, including Sr-90 and Cs-137 in their releases. Based on these measurements and proven models developed by the Nuclear Regulatory Commission, concentrations in the environment can be calculated. These calculations (generally conservative, see Section 5.0) show that insufficient quantities of Sr-90 and Cs- 137 have been released from the stations to yield the measured concentrations in milk.

(2) Over the many years of station operation, Sr-89 has often been released in comparable quantity to Sr-90. Since they are chemically similar, comparable levels should have been detected in milk If the Sr-90 was station related. No station related Sr-89 has been detected in milk samples.

(3) Similar to Sr-89, Cs-134 can be used as an indication of station related Cs-137. Although not as conclusive as Sr-89, the lack of any measurable 6-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Cs-134 in any of the milk samples suggests that the Cs-137 is not station related. This is further confirmed by the evaluation of the air particulate data. The only occurrences of detectable Cs-134 in milk resulted from the Chernobyl incident.

(4) Dairy milk sampling in Connecticut began in the 1960's, several years prior to nuclear station operation. The highest levels of weapons fallout related Sr-90 and Cs-137 (see Figures 6-1 and 6-2), were measured in the years prior to station operation. Samples taken in the immediate station areas have always shown higher levels of weapons related fallout than samples taken from the Central Connecticut Region (CT Pooled Milk). Radioactivity levels of fallout related Sr-90 and Cs-137 have decreased significantly since the 1964 Nuclear Test Ban Treaty due to decay.

(5) Local variability of Sr-90 and Cs-137 in milk is common throughout the United States. Due to the variability in soil conditions, pasturing methods, rainfall, etc., it is the rule rather than the exception. Therefore, it is not surprising that certain farms have higher levels of radioactivity than other farms. In fact, in the past there are some cases where the farms further from the station have higher Sr-90 and Cs-137 values than the farms that are closer to the station.

(6) In the past when a goat farm operated near Millstone (2.0 Mi - ENE), the highest levels of Sr-90 and Cs-137 were typically indicated. This same farm also experienced the highest levels of short-lived activity from the 1976 and 1977 Chinese Tests and the 1986 Chernobyl accident. This indicates that for some unknown reason this farm had the ability for higher reconcentration. Special studies performed at this and other farms failed to find any link to the station.

Based on these facts, the observation that the station effluents are responsible is obviously false. The cause must be one or more of the other variables.

Dominion has carefully examined the data throughout the year and has presented in this report all cases where station related radioactivity could be detected. An analysis of the potential exposure to the maximum individual from any station related activity has been performed and shows that in all cases the exposure is insignificant.

The Connecticut Department of Environmental Protection performs an independent check on certain environmental program analyses. The results of their analyses are comparable to the results from this program's analyses.

These comparisons can be used as a cross-reference to verify measured station activity.

6-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station Figure 6-1 Strontium-90 in Milk pCi/liter 25 20 15 10 5

0 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 Year Figure 6-2 Cesium-137 in Milk p0Ci/lit er 160T 140 * $6 r,

+ CT Pooled Milk 120 I I - --- j -- Haddam area Milk 100 -

I I I - Millstone area Milk i i I.

80 - I I 60 I 40 20, z I

0 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 Year Dairy milk is no longer available in the Millstone area, Haddam Neck no longer collects milk, and CT Pooled milk has not been collected by the State of CT since 1994. Graphs provided to show historical trends.

CY Start-up occurred: July 24,1%7 MP2 Start-up occurred: December, 1975 MP1 Start-up occurred: October 26, 1970 MP3 Start-up occurred: January 23, 1986 6-3 Co*7

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station APPENDIX A LAND USE CENSUS FOR 2003 A-l

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE A-1 Dairy Cows Within 15 miles of Millstone Point- 2003 Direction Distance # of Cow's N 14 Mi 62 NE 13.5 Mi 55 WNW lMi 1 87 NNW 13 Mi 230 NW 10.3 Mi 4 Note: No cowfanns on this list are used for sampling, ailfarinsare greaterthan ten milesfrom plant.

A-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE A-2 Dairy Goats Within 20 miles of Millstone Point- 2003 Direction Distance Sample Location # of Goats N 2 Mi LOCATION 21 5/5*

N 17.3 Mi **

N 20 Mi 2/2 NNE 5.2 Mi LOCATION 22 8/4 ENE 2Mi 2/0 ENE 13.1 Mi 6/2 ENE 16.4 Mi 14/12 WNW 18.1 Mi 5/3 NW 14.1 Mi 3/3 NW 17.3 6/3 NNW 18.5 Mi 28/0 NNW 20.7M 4/3 NNW 29 M' LOCATION 24 70/26

• Number of Goats/Numberof Milkers

• • Unable To Contact As Of This Time A-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE A-3 2003 Resident/Garden Surveve Distance to Distance to Doxvnwind Closest Closest Direction Resident Garden (meters) (meters)

N 1500 1490 NNE 860 870 NE 790 740 ENE 1580 1620 E 1500 1500 ESE 1690 2000 SE SSE .

S SSW SW 3700 3700 WSW 3190 3320 W 2870 2950 WNW 2470 2470 NW 2110 2110 NNW 780 1020

• N/A - not applicable (over water sectors) e Distances were measured in 2003 using GPS.

A4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station APPENDIX B DNC OA PROGRAM B-I

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station INTRODUCTION Dominion Nuclear Connecticut (DNC) maintains an independent non-required quality assurance (QA) program as part of the radiological environmental monitoring program (REMP). The QA program consists of contractor appraisals and quality control samples. This independent program is applicable to all Dominion nuclear facilities because they share a joint contract with Framatome ANP DE&S Environmental Laboratory.

QA PROGRAM DNC The DNC independent QA Program includes spikes of various sample media and duplicate samples (see Table 1). Sample spikes are a check on the accuracy of results of the contractor's radioanalyses. Duplicate samples test the contractor's precision, or reproducibility of results, by comparing analytical results of split samples. An investigation is conducted on any result or trend that does not satisfy acceptance criteria.

OTHER QA PROGRAMS The DNC Independent QA Program is not the only QA Program which monitors REMP radloanalysis performance. Other programs include:

1. Contractor lab's internal QA program. In addition to the Millstone quality control samples, the radioanalysis contractor has its own quality control samples. In total, at least five percent of the contractor's sample analyses include quality control samples.

2. Contractor lab's interlaboratary comparison program with an independent third party, Analytics, Inc. Results of the Analytics intercomparison are contained in Appendix C. Primary contractor participation in an interlaboratory comparison program is required by station Technical Specifications. The Analytics comparison satisfies this requirement.

3. Contractor lab's participation in the National Institute of Standards and Technology (NIST) Measurement Assurance Program (MAP), the Environmental Resource Associates (ERA) Proficiency Test (PT) Program, the Department of Energy (DOE) Quality Assessment Program (QAP),

and the Mixed Analyte performance Evaluation Program (MAPEP). The lab participates in these interlaboratory QA programs because of other clients' needs, not because of nuclear power station environmental sample analyses. However, some of these intercomparison samples are also applicable to nuclear power environmental samples.

B-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station RESU LTS OF MILLSTONE QA PROGRAM FOR CONTRACTOR RADIOAWVALYSES Criteria for passing QA sample analysis is that the result be within 20% of the known spike except in the case of Sr-89 or Sr-90 spikes in milk which have to be within 30% of the known spike. To allow more tolerance for lower activity spikes an alternate criterion may be used. If the two-sigma error range of the analyzed result includes the known spike value the result passes.

The Millstone QA Program indicated that the contractor lab's environmental radiological analysis program was adequate in 2003. Results are shown on Table 2. All of the TLD spike tests satisfied acceptance criteria. Of 101 individual nuclide analysis results on QA samples, 93 passed the acceptance criteria, a 92% success rate. Six of the eight failures were within 35% of the known value. Another was 60% low and the remaining failure (based upon reanalysis) seemed to be a missed spike. Although the spiking process has improved in 2003, investigations indicate these deviations were likely caused by the spike source or sample preparation. Additional emphasis has been placed on both the spiking process and sample preparation. Procedures have been revised to minimize sample loss due to plateout.

B-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station TABLE 1 2003 QUALITY CONTROL SAMPLES OC SAMPLES (Note IT .ROUTINE SAMPLES 1.

SAMPLE TYPE' .

TLD Spike 12 (Note 2) 176 Milk - Strontium 2 (Note 3) 12 Milk - Iodine 4 57 Milk- Gamma (Note 4) 57 Water - Gamma 12 36 Water - Tritium 4 36 Fish/Invertebrate - Gamma 4. 84 Air Particulate - Gross Beta 5 416

- Iodine 4 416

- Gamma 3 32 FOOTNOTES:

1. All samples are spikes except fish/invertebrate which are duplicate oyster samples.

2. Each TLD spike sample is comprised of a set of 4 TLDs.

3. One sample with Sr-89 and Sr-90 and one sample with Sr-90 only.

4. Gamma in water QA spikes are treated as milk surrogates.

TABLE2 RESULTS OF 2003 QUALITY CONTROL SAMPLE ANALYSES SAMPLE TYPE _ - ANALYSES PASSED ANALYSES FAILED TLD Spike 12 0 Milk- Strontium

• 3 0 Milk - Iodine 4 0 Water - Gamma

• 58 4 Water - Tritium 3 I Oysters - Gamma

• 4 0 Air Particulate Gross Beta 5 0 Iodine 3 1 Gamma 13 2 TOTALS TLDs: 12 TLDs: 0 Individual Nuclides: 93 Individual Nuclides: 8 FOOTNOTE:

• Each nuclide is considered an 'analysis' for the gamma and strontium analyses to provide a more detailed comparison.

B4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station APPENDIX C

SUMMARY

OF INTERLABORATORY COMPARISONS YEAR 2003 C-l

Operating Report 2003 Inc. Annual Radiological Environmental Dominion Nuclear Connecticut, Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station INTRODUCTION This appendix covers the Intercomparison Program of the Framatome ANP Environmental Laboratory. Framatome uses QA/QC samples provided by Analytics, Inc. to monitor the quality of analytical processing associated with the Radiological Environmental Monitoring Program (REMP). The suite of Analytics QA/QC samples is designed to be comparable with the pre-1996 US EPA Interlaboratory Cross-Check Program in terms of sample number, matrices, and nuclides. It was modified to more closely match the media mix presently being processed by Framatome and includes:

> milk for gamma (10 nuclides) and low-level (LL) iodine-131 analyses once per quarter,

> milk for Sr-89 and Sr-90 analyses during the 1st and 3rd quarters,

> water for gamma (10 nuclides), low-level (LL) iodine-131, and gross beta analyses during the 1st and 3rd quarters,

> water for Sr-89 and Sr-90 analyses during the 1st and 4th quarters,

> water tritium analysis during the 2nd and 4th quarters,

> air filter for gamma (9 nuclides) analyses during the 2nd and 4th quarters,

> air filter for gross beta analysis during the 1st, 3rd and 4th quarters,

> filter for Sr-90 analysis during the 2nd and 4th quarters.

In addition to the Analytics Intercomparison Program, Framatome also participates in other intercomparison programs. These programs are the National Institute of Standards and Technology (NIST) Measurement Assurance Program (MAP), the Environmental Resource Associates (ERA)

Proficiency Test (PT) Program, the Department of Energy (DOE) Quality Assessment Program (QAP), and the Mixed Analyte Performance Evaluation Program (MAPEP).

RESULTS Intercomparison program results are evaluated using Framatome's internal bias acceptance criteria as defined below:

> within 25% of the known for gross beta in water,

> within 25% of the known for samples containing both Sr-89 and Sr-90,

> within 15% of the known value for other radionuclides, or

> within two sigma of the known value.

Framatome investigates any sample analysis result that does not pass these criteria.

Analytics Intercomparison Program results are included on the pages that follow for the fourth quarter of 2002 through the fourth quarter of 2003. A C-2

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station total of 135 analysis results were obtained with 135 passing acceptance criteria, a 100% success rate.

C-3

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station FRAMATOME ANP 2002 ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION Sml-lQatr/ l-apel-QrtI II I-.

IRatio

- lReported lKnown' Fra'matome/l Number Year Media Nuclide Units Values Values Analytics l Evaluation E3461-162 4th/02 Water H-3 pCi/L 5450 5987 0.91 Agreement E3463-162 4th/02 Filter Gross Alpha pCi/Filter 52 59 0.88 Agreement E3463-162 4th/02 Filter Gross Beta pCi/Filter 147 150 0.98 Agreement E3462-162 4th/02 Water Sr-89 pCi/Filter 72 79 0.91 Agreement E3462-162 4th/02 Water Sr-90 pCi/Filter 16 16 1.00 Agreement E3464-162 4th/02 Filter Ce-141 pCi/Filter 59 59 1.00 Agreement E3464-162 4th/02 Filter Cr-51 pCi/Filter 184 184 1.00 Agreement E3464-162 4th/02 Filter Cs-134 pCi/Filter 51 53 0.96 Agreement E3464-162 4th/02 Filter Cs-i 37 pCi/Filter 125 117 1.07 Agreement E3464-162 4th/02 Filter Co-58 pCi/Filter 75 74 1.01 Agreement E3464-162 4th/02 Filter Mn-54 pCi/Filter 83 75 1.11 Agreement E3464-162 4th/02 Filter Fe-59 pCi/Filter 43 38 1.13 Agreement E3464-162 4th/02 Filter Zn-65 pCi/Filter 103 95 1.08 Agreement E3464-162 4th/02 Filter Co-60 pCVFilter 84 87 0.97 Agreement E3465-162 4th/02 Filter Sr-89 pCI/Filter 68 75 0.91 Agreement E3465-162 4th/02 Filter Sr-90 pCi/Filter 61 60 1.02 Agreement E3466-162 4th/02 Milk 1-131 LL pCi/L 89 86 1.03 Agreement E3466-162 4th/02 Milk 1-131 pCi/L 81 86 0.94 Agreement E3466-162 4th/02 Milk Ce-141 pCI/L 103 111 0.93 Agreement E3466-162 4th/02 Milk Cr-51 pCi/L 334 346 0.97 Agreement E3466-162 4th/02 Milk Cs-134 pCi/L 98 99 0.99 Agreement E3466-162 4th/02 Milk Cs-137 pCi/L 220 220 1.00 Agreement E3466-162 4th/02 Milk Co-58 pCi/L 134 139 0.96 Agreement E3466-162 4th/02 Milk Mn-54 pCi/L 142 142 1.00 Agreement E3466-162 4th/02 Milk Fe-59 pCU/L 74 72 1.03 Agreement E3466-162 4th/02 Milk Zn-65 pCUL 177 178 0.99 Agreement E3466-162 4th/02 Milk Co-60 pCVL 162 164 0.99 Agreement C-4

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station FRAMATOME ANP 2003 ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION Ratio Sample Quarter/' Samplel Reported Known Framatome/

Number Year Media Nuclide Units Values Values Analytics Evaluation E3597-162 1 st/03 Water Gross Alpha pCi/L 55 61 0.90 Agreement E3597-162 I st/03 Water Gross Beta pCiVL 146 186 0.78 Agreement E3598-162 1stU03 Water 1-131 pCUL 68 70 0.97 Agreement E3598-162 1stU03 Water I-1 31 LL pCi/L 68 70 0.97 Agreement E3598-162 1st03 Water Ce-141 pCVL 163 168 0.97 Agreement E3598-162 1sU03 Water Cr-51 pCVL 243 238 1.02 Agreement E3598-162 1st03 Water Cs-1 34 pCVL 83 88 0.94 Agreement E3598-162 1st03 Water Cs-1 37 pCVL 188 195 0.96 Agreement E3598-163 1st03 Water Co-58 pCVL 44 42 1.05 Agreement E3598-162 stU03 Water Mn-54 pCVL 61 63 0.97 Agreement E3598-162 1st03 Water Fe-59 pCVL 48 46 1.04 Agreement E3598-162 1st03 Water Zn-65 pCVL 88 90 0.98 Agreement E3598-162 stU03 Water Co-60 pCVL 156 157 0.99 Agreement E3599-162 stV03 Filter Gross Alpha pC! 52 49 1.06 Agreement E3599-162 stU03 Filter Gross Beta pci 157 148 1.06 Agreement E3600-162 1st03 Milk 1-131 pCi/L 73 74 0.99 Agreement E3600-162 1st03 Milk I-1 31 LL pCi/L 73 74 0.99 Agreement E3600-162 1st03 Milk Ce-141 pCi/L 170 173 0.98 Agreement E3600-162 1st03 Milk Cr-51 pCi/L 244 246 0.99 Agreement E3600-162 1st03 Milk Cs-1 34 pCi/L 86 90 0.96 Agreement E3600-162 1st03 Milk Cs-1 37 pCi/L 196 200 0.98 Agreement E3600-163 1st04 Milk Co-58 pCi/L 44 47 0.94 Agreement E3600-162 1st03 Milk Mn-54 pCi/L 61 64 0.95 Agreement E3600-162 1st03 Milk Fe-59 pCiVL 47 47 1.00 Agreement E3600-162 1st03 Milk Zn-65 pCi/L 96 93 1.03 Agreement E3600-162 1st03 Milk Co-60 pCi/L 162 162 1.00 Agreement E3601-162 1st03 Milk Sr-89 pCi/L 121 133 0.91 Agreement E3601-162 1st03 Milk Sr-90 pCi/L 13 12 1.08 Agreement E3608-162 stU03 Water Sr-89 pCi/L 104 114 0.91 Agreement E3608-162 1st03 Water Sr-90 pCi/L 11 10 1.10 Agreement C-5

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station FRAMATOME ANP 2003 ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION l Ratio Sample Quarter/ Sample - Reported Known Framatomef Number Year Media Nuclide - Units Values - Values Analytics Evaluation E3704-162 2nd/03 Water H-3 pCi/L 10643 11953 0.89 Agreement E3705-162 2nd/03 Filter Gross Alpha pCi/L 20 21 0.95 Agreement E3705-162 2nd/03 Filter Gross Beta pCiIL 116 115 1.01 Agreement E3706-162 2nd/03 Filter Ce-141 pCi/Filter 149 154 0.97 Agreement E3706-162 2nd/03 Filter Cr-51 pCi/Filter 134 130 1.03 Agreement E3706-162 2nd/03 Filter Cs-1 34 pCi/Filter 54 56 0.96 Agreement E3706-162 2nd/03 Filter Cs-137 pCi/Filter 135 125 1.08 Agreement E3706-162 2nd/03 Filter Co-58 pCi/Filter 53 50 1.06 Agreement E3706-162 2nd/03 Filter Mn-54 pCi/Filter 110 101 1.09 Agreement E3706-162 2nd/03 Filter Fe-59 pCi/Filter 60 54 1.11 Agreement E3706-162 2nd/03 Filter Zn-65 pCi/Filter 110 99 1.11 Agreement E3706-162 2nd/03 Filter Co-60 pCi/Filter 71 72 0.99 Agreement E3707-162 2nd/03 Filter Sr-89 pCi/Filter 78 87 0.90 Agreement E3707-162 2nd/03 Filter Sr-90 pCi/Filter 24 24 1.00 Agreement E3708-162 2nd/03 Milk 1-131 pCi/L 109 103 1.06 Agreement E3708-162 2nd/03 Milk 1-131 LL pCiIL 104 103 1.01 Agreement E3708-162 2nd/03 Milk Ce-141 pCiIL 283 283 1.00 Agreement E3708-162 2nd/03 Milk Cr-51 pCi/L 239 239 1.00 Agreement E3708-162 2nd/03 Milk Cs-1 34 pCi/L 98 103 0.95 Agreement E3708-162 2nd/03 Milk Cs-137 pCi/L 232 230 1.01 Agreement E3708-162 2nd/03 Milk Co-58 pCU/L 92 93 0.99 Agreement E3708-162 2nd/03 Milk Mn-54 pCi/L 186 186 1.00 Agreement E3708-162 2nd/03 Milk Fe-59 pCi/L 100 99 1.01 Agreement E3708-162 2nd/03 Milk Zn-65 pCi/L 181 181 1.00 Agreement E3708-162 2nd/03 Milk Co-60 pCi/L 134 132 1.02 Agreement C-6

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station FRAMATOME ANP 2003 ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATIONI Ratio Sample Quarter/ Sample Reported Known Framatome/

Number Year Media Nuclide Units Values Values Analytics Evaluation E3866-162 3rd/03 Water Gross Alpha pCi/L 37 36 1.03 Agreement E3866-162 3rd/03 Water Gross Beta pCi/L 264 246 1.07 Agreement E3867-162 3rd/03 Water 1-131 pCi/L 69 76 0.91 Agreement E3867-162 3rd/03 Water 1-131LL pCi/L 78 76 1.03 Agreement E3867-162 3rd/03 Water Ce-1 41 pCi/L 78 81 0.96 Agreement E3867-162 3rd/03 Water Cr-51 pCi/L 198 221 0.90 Agreement E3867-162 3rd/03 Water Cs-134 pCi/L 108 113 0.96 Agreement E3867-162 3rd/03 Water Cs-1 37 pCi/L 85 84 1.01 Agreement E3867-162 3rd/03 Water Co-58 pCi/L 92 94 0.98 Agreement E3867-162 3rd/03 Water Mn-54 pCi/L 93 88 1.06 Agreement E3867-162 3rd/03 Water Fe-59 pCi/L 74 75 0.99 Agreement E3867-162 3rd/03 Water Zn-65 pCi/L 170 166 1.02 Agreement E3867-162 3rd/03 Water Co-60 pCi/L 118 117 1.01 Agreement E3868-162 3rd/03 Filter Gross Alpha pCi 30 28 1.07 Agreement E3868-162 3rd/03 Filter Gross Beta pCi 197 189 1.04 Agreement E3869-162 3rd/03 Milk 1-131 pCUL 66 74 0.89 Agreement E3869-162 3rd/03 Milk 1-131LL pCU1L 74 74 1.00 Agreement E3869-162 3rd/03 Milk Ce-141 pCU/L 90 86 1.05 Agreement E3869-162 3rd/03 Milk Cr-51 pCUL 228 233 0.98 Agreement E3869-162 3rd/03 Milk Cs-1 34 pCUL 123 119 1.03 Agreement E3869-162 3rd/03 Milk Cs-1 37 pCUL 94 88 1.07 Agreement E3869-162 3rd/03 Milk Co-58 pCU/L 99 99 1.00 Agreement E3869-162 3rd/03 Milk Mn-54 pCUL 101 93 1.09 Agreement E3869-162 3rd/03 Milk Fe-59 pCiUL 84 79 1.06 Agreement E3869-162 3rd/03 Milk Zn-65 pCi/L 178 176 1.01 Agreement E3869-162 3rd/03 Milk Co-60 pCi/L 129 123 1.05 Agreement E3870-162 3rd/03 Milk Sr-89 pCVL 80 100 0.80 Agreement E3870-162 3rd/03 Milk Sr-90 pCVL 11 14 0.79 Agreement C-7

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station FRAMATOME ANP 2003 ANALYTICS ENVIRONMENTAL CROSS CHECK PROGRAM PERFORMANCE EVALUATION

[ -Ratio Sample Quarter/ Sample Reported Known Framatome/

Number Year Media Nudide Units Values Values Analytics Evaluation E3937-162 4th/03 Water H-3 pCi/L 2307 2290 1.01 Agreement E3938-162 4th/03 Water Sr-89 pCi/L 99 100 0.99 Agreement E3938-162 4th/03 Water Sr-90 pCi/L 11 10 1.10 Agreement E3939-162 4th/03 Filter Gross Beta pCi 50 43 1.16 Agreement E3940-162 4th/03 Filter Ce-141 pCi 110 100 1.10 Agreement E3940-162 4th/03 Filter Cr-51 PCi 171 153 1.12 Agreement E3940-162 4th/03 Filter Cs-I 34 pCi 75 74 1.01 Agreement E3940-162 4th/03 Filter Cs-I 37 pCi 75 71 1.06 Agreement E3940-162 4th/03 Filter Co-58 pCi 64 61 1.05 Agreement E3940-162 4th/03 Filter Mn-54 pCi 103 95 1.08 Agreement E3940-162 4th/03 Filter Fe-59 pCi 64 56 1.14 Agreement E3940-162 4th/03 Filter Zn-65 pCi 117 108 1.08 Agreement E3940-162 4th/03 Filter Co-60 pCi 82 85 0.96 Agreement E3941 -162 4th/03 Filter Sr-90 pCi 11 11 1.00 Agreement E3942-162 4th/03 Milk 1-131 pCUL 84 90 0.93 Agreement E3942-162 4th/03 Milk I-1 31 LL pCi/L 91 90 1.01 Agreement E3942-162 4th/03 Milk Ce-1 41 pCi/L 191 202 0.95 Agreement E3942-162 4th/03 Milk Cr-51 pCi/L 275 280 0.98 Agreement E3942-162 4th/03 Milk Cs-I 34 pCi/L 135 135 1.00 Agreement E3942-162 4th/03 Milk Cs-137 pCi/L 126 129 0.98 Agreement E3942-162 4th/03 Milk Co-58 pCi/L 107 i11 0.96 Agreement E3942-162 4th/03 Milk Mn-54 pCi/L 173 173 1.00 Agreement E3942-162 4th/03 Milk Fe-59 pCiUL 106 102 1.04 Agreement E3942-162 4th/03 Milk Zn-65 pCVL 203 197 1.03 Agreement E3942-162 4th/03 Milk Co-60 pCi/L 148 155 0.95 Agreement C-8

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Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2003 Millstone Station APPENDIX D ERRATA FOR 2003 D-1

Dominion Nuclear Connecticut, Inc. Annual Radiological Environmental Operating Report 2002 Millstone Station TABLE 18 MUSSELS (PCI/G WET WT.)

COLLECTION LOCATION DATE BE-7 K-40 CR-51 MN-54 co-se FE-59 (4/-) (4/-) (0/-) (4/0) (4/0) 28 03/07/02 -0.140 0.220 1.3 0.6 -0.03 0.26 -0.018 0.023 -0.024 0.025 -0.085 0.071 1 06/03/02 0.000 0.230 1.5 0.5 0.04 0.35 -0.025 0.027 0.001 0.026 0.024 0.078 08/14/02 0.000 0.160 1.6 0.4 0.09 0.27 -0.008 0.016 -0.004 0.020 -0.028 0.048 12/10/02 0.040 0.200 1.6 0.5 -0.12 0.26 0.005 0.*017 -0.010 0 .019 -0.040 0.052 30 03/05/02 0.090 0.170 1.9 0.5 -0.04 0.19 -0.011 0.019 0.004 0.020 0.048 0.056 06/18/02 0.140 0.230 1.6 0.6 0.04 0.32 -0.018 0.022 0.003 0.024 -0.023 0.090 08/13/02 0.030 0.190 1.7 0.5 0.02 0.27 -0.006 0.019 -0.002 0.016 0.017 0.058 10/29/02 -0.050 0.160 2.0 0.4 -0.02 0.20 -0.009 0.015 0.009 0.017 -0.039. 0.045 COLLECTION LOCATION DATE CO-60 ZN-65 ZR-95 RET-103 RU-106 (0/-) (4/-) (0/-) (4/-) (4/-) (4/-)

28 03/07/7021 -0.014 0.022 -0.050 0 .110 0.030 0.043 -0.002 0.032 -0.005 0.021 -0.10 0.22 06/03/02 0.010 0.027 -0.032 0.064 -0.003 0.044 0.024 0.039 0.003 0.024 -0.09 0.18 08/14/02 0.005 0.015 0.050 0.069 0.004 0.033 -0.045 0.030 0.003 0.022 -0.04 0.15 12/10/02 -0.006 0.024 -0.021 0.040 0.021 0.039 0.034 0.031 -0.006 0.025 -0.08 0.17 30 03/05/02 -0.002 0.023 -0.060 0.054 -0.001 0.029 -0.015 0.022 0.011 0.020 -0.15 0.19 06/18/02 0.017 0.021 -0.070 0.058 0.026 0.045 -0.006 0.035 0.000 0.029 0.14. 0.21 08/13/02 -0.013 0.019 0.008 0.042 -0.004 0.033 0.001 0.029 -0.004 0.023 0.04 0.16 10/29/02 0.011 0.019 -0.010 0.035 -0.010 0.033 0.005 0.022 -0.010 0.230 0.02 - 0.15 COLLECTION LOCATION DATE AG-ilOM 1-131 CS-134 CS-137 SB-125 TH-228 28 03/07/02 0.010 0.033 0.050 0.069 0.000 0.025 -0.009 0.024 -0.001 0.060 0.060 0.100 106/03/02 -0.004 0.024 -0.140 0.170 0.001 0.023 -0.004 0.022 0.018 0.060 0.011 0.098 08/14/02 -0.003 0.023 0.220 0.280 0.000 0.014 -0.005 0.016 0.002 0.037 0.017 0.052 12/10/02 0.014 0.027 0.120 0.260 0.000 0.019 -0.004 0.017 -0.012 0.041 0.083 0.073 30 03/05/02 -0.003 0.028 0.012 0.033 -0.006 0.022 0.007 0.020 0.000 0.047 -0.040 0.072 06/18/02 0.003 0.036 0.040 0.140 -0.031 0.024 -0.023 0.024 0.033 0.055 -0.020 0.110 08/13/02 -0.012 0.027 0.020 0.330 0.002 0.019 -0.015 0.017 -0.003 0.037 -0.008 0.061 10/29/02 0.002 0.020 0.030 0.100 -0.005 0.015 -0.004 0 .019 0.013 0.043 -0.043 0.059 D-2