Text

Joseph M. Farley Nuclear Plant; Vogtle Electric Generating Plant; Annual Radiological Environmental Operating Reports for 2005
	ML061380261
Person / Time
Site:	Hatch, Vogtle, Farley
Issue date:	05/12/2006
From:	Sumner H; Southern Nuclear Operating Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	NL-06-0963
	Download: ML061380261 (206)
	v • d • e

H.L Sumner, Jr. Southern Nuclear Vice President Operating Company, Inc.

Hatch Project Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7279 SOUTHERN AN 4V May 12, 2006 COMPANY Energy to Serve Your World' Docket Nos.: 50-321 50-348 50-424 NL-06-0963 50-366 50-364 50-425 U. S. Nuclear Regulatory Commission ATI'N: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Joseph M. Farley Nuclear Plant Vogtle Electric Generating Plant Annual Radiological Environmental Operating Reports for 2005 Ladies and Gentlemen:

In accordance with section 5.6.2 of the referenced plants' Technical Specifications, Southern Nuclear Operating Company hereby submits the Annual Radiological Environmental Operating Reports for 2005.

This letter contains no NRC commitments. If you have any questions, please advise.

Sincerely, H. L. Sumner, Jr.

HLS/JMG/sdl

Enclosures:

1. Hatch Annual Radiological Environmental Operating Report for 2005

2. Farley Annual Radiological Environmental Operating Report for 2005

3. Vogtle Annual Radiological Environmental Operating Report for 2005

--7 CI2z5

U. S. Nuclear Regulatory Commission NL-06-0963 Page 2 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President (w/o Enclosures)

Mr. L. M. Stinson, Vice President - Plant Farley (w/o Enclosures)

Mr. D. E. Grissette, Vice President - Plant Vogtle (w/o Enclosures)

Mr. J. R. Johnson, General Manager - Plant Farley Mr. D. R. Madison, General Manager - Plant Hatch Mr. T. E. Tynan, General Manager - Plant Vogtle Mr. D. A. Hostetter, Radiological Svcs. Supervisor RType: CFA04.054; CHA02.004; CVC7000; LC# 14435 U. S. Nuclear Regulatory Commission Dr. W. D. Travers, Regional Administrator Mr. R. E. Martin, NRR Project Manager - Farley Mr. C. Gratton, NRR Project Manager - Hatch Mr. C. Gratton, NRR Project Manager - Vogtle Mr. C. A. Patterson, Senior Resident Inspector - Farley Mr. D. S. Simpkins, Senior Resident Inspector - Hatch Mr. G. J. McCoy, Senior Resident Inspector - Vogtle State of Alabama Mr. K. E. Whatley, Department of Public Health, Division of Radiation Control State of Georgia Mr. J. L. Setser, Department of Natural Resources Georgia Power Company Mr. M. C. Nichols American Nuclear Insurers Mr. R. A. Oliveira

ENCLOSURE 1 Edwin I. Hatch Nuclear Plant Annual Radiological Environmental Operating Report for 2005

EDWIN I. HATCH NUCLEAR PLANT ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2005 SOUTHERN A COMPANY Energy to Serve Your Worlds

TABLE OF CONTENTS Title and/or Section Subsection Page List of Figures ii List of Tables iii List of Acronyms iv 1.0 Introduction 1-1 2.0 REMP Description 2-1 3.0 Results Summary 3-1 4.0 Discussion of Results 4-1 4.1 Land Use Census and River Survey 4-5 4.2 Airborne 4-7 4.3 Direct Radiation 4-12 4.4 Milk 4-18 4.5 Vegetation 4-22 4.6 River Water 4-25 4.7 Fish 4-28 4.8 Sediment 4-32 5.0 Interlaboratory Comparison Program (ICP) 5-1 6.0 Conclusions 6-1 i

LIST OF FIGURES Figure Number Title Page Figure 2-1 REMP Stations Near the Plant 2-7 Figure 2-2 REMP Stations Beyond Six Miles from the Plant 2-8 Figure 4.2-1 Average Weekly Gross Beta Air Concentration 4-7 Figure 4.2-2 Average Annual Cs-137 Concentration in Air 4-9 Figure 4.3-1 Average Quarterly Exposure from Direct Radiation 4-13 Figure 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 4-15 Figure 4.4-1 Average Annual Cs-137 Concentration in Milk 4-18 Figure 4.4-2 Average Annual I- 131 Concentration in Milk 4-20 Figure 4.5-1 Average Annual Cs-137 Concentration in Vegetation 4-23 Figure 4.6-1 Average Annual H-3 Concentration in River Water 4-26 Figure 4.7-1 Average Annual Cs-137 Concentration in Fish 4-28 Figure 4.7-2 Average Annual Cs-134 Concentration in Fish 4-30 Figure 4.8-1 Average Annual Co-60 Concentration in Sediment 4-32 Figure 4.8-2 Average Annual Cs-137 Concentration in Sediment 4-34 Figure 4.8-3 Average Annual Indicator Station Concentrations of Select Nuclides in Sediment 4-36 ii

LIST OF TABLES Table Number Title Page Table 2-1 Summary Description of Radiological Environmental Monitoring Program 2-2 Table 2-2 Radiological Environmental Sampling Locations 2-5 Table 3-1 Radiological Environmental Monitoring Program Annual Summary 3-2 Table 4-1 Minimum Detectable Concentrations (MDC) 4-1 Table 4-2 Reporting Levels (RL) 4-2 Table 4-3 Deviations from Radiological Environmental Monitoring Program 4-4 Table 4.1-1 Land Use Census Results 4-5 Table 4.2-1 Average Weekly Gross Beta Air Concentration 4-8 Table 4.2-2 Average Annual Cs-137 Concentration in Air 4-10 Table 4.3-1 Average Quarterly Exposure from Direct Radiation 4-14 Table 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 4-16 Table 4.4-1 Average Annual Cs-137 Concentration in Milk 4-19 Table 4.4-2 Average Annual I-131 Concentration in Milk 4-21 Table 4.5-1 Average Annual Cs-137 Concentration in Vegetation 4-24 Table 4.6-1 Average Annual H-3 Concentration in River Water 4-27 Table 4.7-1 Average Annual Cs-137 Concentration in Fish 4-29 Table 4.7-2 Average Annual Cs-134 Concentration in Fish 4-31 Table 4.8-1 Average Annual Co-60 Concentration in Sediment 4-33 Table 4.8-2 Average Annual Cs-137 Concentration in Sediment 4-35 Table 4.8-3 Sediment Nuclide Concentrations Other Than Co-60 &

Cs-137 4-37 Table 5-1 Interlaboratory Comparison Results 5-3 iii

LIST OF ACRONYMS Acronyms presented in alphabetical order.

Acronym Definition ASTM American Society for Testing and Materials CL Confidence Level EL Georgia Power Company Environmental Laboratory EPA Environmental Protection Agency GPC Georgia Power Company HNP Edwin I. Hatch Nuclear Plant ICP Interlaboratory Comparison Program MDC Minimum Detectable Concentration MDD Minimum Detectable Difference NA Not Applicable NDM No Detectable Measurement(s)

NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual Po Preoperation REMP Radiological Environmental Monitoring Program RL Reporting Level TLD Thermoluminescent Dosimeter TS Technical Specification iv

1.0 INTRODUCTION

The Radiological Environmental Monitoring Program (REMP) is conducted in accordance with Chapter 4 of the Offsite Dose Calculation Manual (ODCM).

REMP activities for 2005 are reported herein in accordance with Technical Specification (TS) 5.6.2 and ODCM 7.1.

The objectives of the REMP are to:

1) Determine the levels of radiation and the concentrations of radioactivity in the environs and;

2) Assess the radiological impact (if any) to the environment due to the operation of the Edwin I. Hatch Nuclear Plant (HNP).

The assessments include comparisons between the results of analyses of samples obtained at locations where radiological levels are not expected to be affected by plant operation (control stations) and at locations where radiological levels are more likely to be affected by plant operation (indicator stations), as well as comparisons between preoperational and operational sample results.

The pre-operational stage of the REMP began with the establishment and activation of the environmental monitoring stations in January of 1972. The operational stage of the REMP began on September 12, 1974 with Unit 1 initial criticality.

A description of the REMP is provided in Section 2 of this report. An annual summary of the results of the analyses of REMP samples is provided in Section 3.

A discussion of the results, including assessments of any radiological impacts upon the environment, and the results of the land use census and the river survey, are provided in Section 4. The results of the Interlaboratory Comparison Program (ICP) are provided in Section 5. Conclusions are provided in Section 6.

1-1

2.0 REMP DESCRIPTION A summary description of the REMP is provided in Table 2-1. This table summarizes the program as it meets the requirements outlined in ODCM Table 4-1. It details the sample types to be collected and the analyses to be performed in order to monitor the airborne, direct radiation, waterborne and ingestion pathways, and also delineates the collection and analysis frequencies. The sampling locations (stations) specified by ODCM 4.2 are depicted on maps in Figures 2-1 and 2-2.

These maps are keyed to Table 2-2 which delineates the direction and distance of each station from the main stack.

REMP samples are collected by Georgia Power Company's (GPC) Environmental Laboratory (EL) personnel. The same lab performs all the laboratory analyses at their headquarters in Smyrna, Georgia.

2-1

TABLE 2-1 (SHEET 1 of 3)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Approximate Sampling and Type of Analysis and Frequency and/or Sample Number of Sample Collection Frequency Locations

1. Airborne 6 Continuous operation Radioiodine canister: I-131 analysis, weekly.

Radioiodine and of the sampler with Particulates sample collection Particulate sampler: analyze for gross beta radioactivity not less weekly. than 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months following filter change, weekly; perform gamma isotopic analysis on affected sample when gross beta activity is 10 times the yearly mean of control samples; and composite (by location) for gamma isotopic analysis, quarterly.

2. Direct Radiation 37 Quarterly Gamma dose, quarterly.

3. Ingestion-Milk (a) 1 Biweekly Gamma isotopic and I- 131 analysis, biweekly.

~~~~~~~~~~~. . ........... ....

...__A A.....

Fish or Clams (b) 2 Semiannually Gamma isotopic analysis on edible portions, semiannually.

Grass or Leafy 3 Monthly during Gamma isotopic analysis, monthly. (c)

Vegetation growing season.

4. Waterborne Surface 2 Composite sample Gamma isotopic analysis, monthly. Composite (by location) for collected monthly. (d) tritium analysis, quarterly.

S......l..................................

l...............................l.......................................................

ic _.... a s .......

Sediment 2Semiannually. Gamma isotopic analysis, semiannually.

TABLE 2-1 (SHEET 2 of 3)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Approximate Sampling and Type of Analysis and Frequency and/or Sample Number of Sample Collection Frequency Locations _

Drinking Water One sample of river River water collected I-13 1 analysis on each sample when biweekly collections are (e&f) water near the intake near the intake will be required. Gross beta and gamma isotopic analysis on each and one sample of a composite sample; sample; composite (by location) for tritium analysis, quarterly.

finished water from the finished water will each of one to three be a grab sample.

of the nearest water These samples will be supplies which could collected monthly be affected by HNP unless the calculated discharges. dose due to consumption of the water is greater than 1 mrem/year; then the collection will be biweekly. The collections may revert to monthly should the calculated doses become less than 1 i h mrem/year. i

TABLE 2-1 (SHEET 3 of 3)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Notes:

a. Up to three sampling locations within 5 miles and in different sectors will be used as available. In addition, one or more control locations beyond 10 miles will be used.

b. Commercially or recreationally important fish may be sampled. Clams may be sampled if difficulties are encountered in obtaining sufficient fish samples.

c. If gamma isotopic analysis is not sensitive enough to meet the Minimum Detectable Concentration (MDC), a separate analysis for I-131 may be performed.

d. The composite samples shall be composed of a series of aliquots collected at intervals not exceeding a few hours.

e. If it is found that river water downstream of the plant is used for drinking, drinking water samples will be collected and analyzed as specified herein.

f. A survey shall be conducted annually at least 50 river miles downstream of the plant to identify those who use water from the Altamaha River for drinking.

TABLE 2-2 (SHEET 1 of 2)

RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS Station Station Descriptive Location Direction Distance (a) Sample Type Number Type (a) (miles) 064 Other Roadside Park WNW 0.8 Direct Rad 101 Indicator Inner Ring N 1.9 Direct Rad 102 Indicator Inner Ring NNE 2.5 Direct Rad 103 Indicator Inner Ring NE 1.8 Airborne Rad Direct Rad 104 Indicator Inner Ring ENE 1.6 Direct Rad 105 Indicator Inner Ring E 3.7 Direct Rad 106 Indicator Inner Ring ESE 1.1 Direct Rad Vegetation 107 Indicator Inner Ring SE 1.2 Airborne Rad Direct Rad 108 Indicator Inner Ring SSE 1.6 Direct Rad 109 Indicator Inner Ring S 0.9 Direct Rad 110 Indicator Inner Ring SSW 1.0 Direct Rad 111 Indicator Inner Ring SW 0.9 Direct Rad 112 Indicator Inner Ring WSW 1.0 Airborne Rad Direct Rad Vegetation 113 Indicator Inner Ring W 1.1 Direct Rad 114 Indicator Inner Ring WNW 1.2 Direct Rad 115 Indicator Inner Ring NW 1.1 Direct Rad 116 Indicator Inner Ring NNW 1.6 Airborne Rad Direct Rad 170 Control Upstream WNW ( River (b) 172 Indicator Downstream E (c) River (b) 201 Other Outer Ring N 5.0 Direct Rad 202 Other Outer Ring NNE 4.9 Direct Rad 203 Other Outer Ring NE 5.0 Direct Rad 204 Other Outer Ring ENE 5.0 Direct Rad 205 Other Outer Ring E 7.2 Direct Rad 206 Other Outer Ring ESE 4.8 Direct Rad 207 Other Outer Ring SE 4.3 Direct Rad 208 Other Outer Ring SSE 4.8 Direct Rad 209 Other Outer Ring S 4.4 Direct Rad 210 Other Outer Ring SSW 4.3 Direct Rad 211 Other Outer Ring SW 4.7 Direct Rad 212 Other Outer Ring WSW 4.4 Direct Rad 213 Other Outer Ring W 4.3 Direct Rad 214 Other Outer Ring WNW 5.4 Direct Rad 215 Other Outer Ring NW 4.4 Direct Rad 216 Other Outer Ring NNW 4.8 Direct Rad 301 Other Toombs Central School N 8.0 Direct Rad 304 Control State Prison ENE 11.2 Airborne Rad Direct Rad 304 Control State Prison ENE 10.3 Milk 309 Control Baxley S 10.0 Airborne Rad Substation Direct Rad 416 Control Emergency News NNW 21.0 Direct Rad Center Vegetation 2-5

TABLE 2-2 (SHEET 2 of 2)

RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS Notes:

a. Direction and distance are determined from the main stack.

b. River (fish or clams, shoreline sediment, and surface water)

c. Station 170 is located approximately 0.6 river miles upstream of the intake structure for river water, 1.1 river miles for sediment and clams, and 1.5 river miles for fish.

Station 172 is located approximately 3.0 river miles downstream of the discharge structure for river water, sediment and clams, and 1.7 river miles for fish.

The locations from which river water and sediment may be taken can be sharply defined.

However, the sampling locations for clams often have to be extended over a wide area to obtain a sufficient quantity. High water adds to the difficulty in obtaining clam samples and may also make an otherwise suitable location for sediment sampling unavailable. A stretch of the river of a few miles or so is generally needed to obtain adequate fish samples. The mile locations given above represent approximations of the locations where samples are collected.

2-6

Radiological Environmental Sampling Locations Indicator Control Additional REMP Stations Near TLD A A A the Plant Other 0 0 0 TLD & Other a a O Figure 2-1 2-7 CO)

L Radiological Environmental Sampling Locations REMP Stations Six Indicator Control Additional Beyond TLD A A A Miles from the Plant Other 0 0 0 TLD & Other Figure 2-2 2-8 co'z,

3.0 RESULTS

SUMMARY

In accordance with ODCM 7.1.2.1, the summarized and tabulated results for all of the regular samples collected for the year at the designated indicator and control stations are presented in Table 3-1. The format of Table 3-1 is similar to Table 3 of the Nuclear Regulatory Commission (NRC) Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program", Revision 1, November 1979. Since no naturally occurring radionuclides were found in the plant's effluent releases, only man-made radionuclides are reported as permitted by ODCM 7.1.2.1. Results for samples collected at locations other than control or indicator stations are discussed in Section 4 under the particular sample type.

3-1

TABLE 3-1 (SHEET 1 of 4)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Edwin I. Hatch Nuclear Plant, Docket Nos. 50-321 and 50-366 Appling County, Georgia Medium or Type and Total Minimum Indicator Location with the Highest Other Control Pathway Number of Detectable Locations Annual Mean Stations(h) Locations Sampled Analyses Concentration Mean (b), Mean (b), Mean (b),

(Unit of Performed (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) (Fraction) & Direction Range (Fraction) (Fraction)

(Fraction)

Airborne Gross Beta 10 19.7 No. 112 20.0 NA 19.3 Particulates 311 7.0-49.9 Indicator 7.0-49.9 6.0-40.1 (fCi/m3) (207/207) 1.0 mile, WSW (52/52) . .(104/104)

)...................................

.I.... ............ ..... ............................

......I......... ...........

Gamma Isotopic 24 Cs-134 50 NDM (c) NDM NDM

. Cs-137 60 NDM NDM NDM Airborne 1-131 70 NDM NDM NA NDM Radioiodine 311 (fCi/m3)

Direct Radiation Gamma Dose NA (d) 12.1 No. 214(e) 15.5 12.0 12.5 (mR/91 days) 145 10.1-15.5 Outer Ring 14.3-16.6 9.2-17.3 10.6-15.0 (62/62) 5.4 miles, (4/4) (71/71) (12/12)

WNW Milk Gamma Isotopic NA (pCi/l) 26 Cs-134 15 NA NDM NDM Cs-137 18 NA NDM NDM Ba- 140 60 NA NDM NDM La-140 ...... .....

15 NA NDM ................... NDM I-131 1 NA NDM NDM 26

TABLE 3-1 (SHEET 2 of 4)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Edwin I. Hatch Nuclear Plant, Docket Nos. 50-321 and 50-366 Appling County, Georgia Medium or Type and Minimum Indicator Location with the Highest Control Pathway Total Number Detectable Locations Annual Mean Locations Sampled of Analyses Concentration Mean (b), Mean (b), I (Unit of Performed (MDC) (a) Range Name Distance Mean (b), Range Measurement) (Fraction) & Direction Range (Fraction) (Fraction)

Vegetation Gamma (pCi/kg-wet) Isotopic 36 1-131 60 NDM NDM NDM Cs-134 60 NDM NDM NDM Cs-137 80 47.7 Station 106 55.2 39.8 16.6-108.8 Inner Ring 27.8-108.8 25.4-55.8

______________(12/24) 1. 1 miles; ESE (8/12) (3/12)

River Water Gammna (pCi/A) Isotopic 24 Mn-54 15 NDM NDM NDM Fe-59 30 NDM NDM NDM Co-58 15 NDM NDM NDM Co-60 15 NDM NDM NDM Zn-65 30 NDM NDM NDM Zr-95 30 NDM NDM NDM Nb-95 15 NDM NDM NDM I-131 15 (f) NDM NDM NDM Cs-134 15 NDM NDM NDM Cs-137 18 NDM NDM NDM Ba- 140 60 NDM NDM NDM La- 140 15 NDM NDM_ NDM Tritium 3000 (g) 245 N.12245 NDM 8 215-275 3.0 miles 215-275

__ __ __ ___ _ _ _ _ _ _ _ _ _ _ (2/4) Downstream __2___4_ __

TABLE 3-1 (SHEET 3 of 4)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Edwin I. Hatch Nuclear Plant, Docket Nos. 50-321 and 50-366 Appling County, Georgia Medium or Type and Minimum Indicator Location with the Highest Control Pathway Total Number Detectable Locations Annual Mean Locations Sampled of Analyses Concentration Mean (b), Mean (b),

(Unit of Performed (MDC) (a) Range Name Distance Mean (b), Range Measurement) (Fraction) & Direction Ra ge (Fraction) (Fraction)

Fish Gamma (pCi/kg-wet) Isotopic 4

Mn-54 130 NDM NDM NDM Fe-59 260 NDM NDM NDM Co-58 130 NDM NDM NDM Co-60 130 NDM NDM NDM Zn-65 260 NDM NDM NDM Cs-134 130 NDM NDM NDM Cs-137 150 13.0 No. 170 13.3 13.3 11.7-14.2 1.5 miles 9.9-16.7 9.9-16.7

_ (2/2) Upstream (2/2) (2/2)

Sediment Gamma (pCi/kg-dry) Isotopic 4

Cs- 134 150 NDM NDM NDM Cs-137 180 57.2 No. 172 57.2 30.3 37.5-76.8 3.0 miles 37.5-76.8 23.7-37.0 (2/2) Downstream (2/2) (2/2)

TABLE 3-1 (SHEET 4 of 4)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Edwin I. Hatch Nuclear Plant, Docket Nos. 50-321 and 50-366 Appling County, Georgia NOTATIONS

a. The MDC is defined in ODCM 10.1. Except as noted otherwise, the values listed in this column are the detection capabilities required by ODCM Table 4-3. The values listed in this column are a priori (before the fact) MDCs. In practice, the a posteriori (after the fact) MDCs are generally lower than the values listed. Any a posteriori MDC greater than the value listed in this column is discussed in Section 4.

b. Mean and range are based upon detectable measurements only. The fraction of all measurements at specified locations that are detectable is placed in parenthesis.

c. No Detectable Measurement(s).

d. Not Applicable.

e. This station is in the outer ring and is one of eighteen "other (h)" stations.

f. If a drinking water pathway were to exist, a MDC of 1 pCi/l would have been used (see Table 4-1 of this report).

g. If a drinking water pathway were to exist, a MDC of 2000 pCi/l would have been used (see Table 4-1 of this report).

h. "Other" stations, identified in the "station type" column of Table 2-2, include community and special stations.

4.0 DISCUSSION OF RESULTS Included in this section are evaluations of the laboratory results for the various sample types. Comparisons were made between the difference in mean values for pairs of station groups (e.g., indicator and control stations) and the calculated Minimum Detectable Difference (MDD) between these pairs at the 99%

Confidence Level (CL). The MDD was determined using the standard Student's t-test. A difference in the mean values which was less than the MDD was considered to be statistically indiscernible.

The 2005 results were compared with past results, including those obtained during pre-operation. As appropriate, results were compared with their Minimum Detectable Concentrations (MDC) and Reporting Levels (RL) which are listed in Tables 4-1 and 4-2 of this report, respectively. The required MDCs were achieved during laboratory sample analyses. Any anomalous results are explained within this report.

Results of interest are graphed to show historical trends. The data points are tabulated and included in this report. The points plotted and provided in the tables represent mean values of only detectable results. Periods for which no detectable measurements (NDM) were observed or periods for which values were not applicable (e.g., milk indicator, etc.) are plotted as O's and listed in the tables as NDM.

Table 4-1 Minimum Detectable Concentrations (MDC)

Analysis Water Airborne Fish Milk Grass or Sediment (pCi/1) Particulate (pCi/kg- (pa/l) Leafy (pCi/kg-or Gases wet) Vegetation dry)

(fCi/m3) (pCi/kg-wet)

Gross Beta 4 10 _ 1_1_1_X H-3 2000 (a)

Mn-54 15 130 Fe-59 30 260 Co-58 15 130 Co-60 15 130 Zn-65 30 260 Zr-95 30 Nb-95 15 1-131 1 (b) 70 1 60 Cs-134 15 50 130 15 60 150 Cs-137 18 60 150 18 80 180 Ba-140 60 60 La-140 15 15 (a) If no drinking water pathway exists, a value of 3000 pCi/l may be used.

(b) If no drinking water pathway exists, a value of 15 pCi/l may be used.

4-1

Table 4-2 Reporting Levels (RL)

Analysis Water Airborne Fish Milk (pCi/I) Grass or Leafy (pCi/I) Particulate (pCi/kg-wet) Vegetation or Gases (pCi/kg-wet)

(fCi/m3)

H-3 20,000 (a)

Mn-54 1000 30,000 Fe-59 400 10,000 Co-58 1000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-95 400 Nb-95 700 1-131 2 (b) 900 3 100 Cs-134 30 10,000 1000 60 1000 Cs-137 50 20,000 2000 70 2000 Ba-140 200 300 La-140 100 400 (a) This is the 40 CFR 141 value for drinking water samples. If no drinking water pathway exists, a value of 30,000 may be used.

(b) If no drinking water pathway exists, a value of 20 pCi/l may be used.

4-2

Atmospheric nuclear weapons tests from the mid 1940s through 1980 distributed man-made nuclides around the world. The most recent atmospheric tests in the 1970s and in 1980 had a significant impact upon the radiological concentrations found in the environment prior to and during preoperation, and the earlier years of operation. Some long lived radionuclides, such as Cs-137, continue to be detectable.

Significant upward trends also followed the Chernobyl incident which began on April 26, 1986.

In accordance with ODCM 4.1.1.2.1, deviations from the required sampling schedule are permitted, if samples are unobtainable due to hazardous conditions, unavailability, inclement weather, equipment malfunction or other just reasons.

Deviations from conducting the REMP as described in Table 2-1 are summarized in Table 4-3 along with their causes and resolutions.

All results were tested for conformance to Chauvenet's criterion (G. D. Chase and J. L. Rabinowitz, Principles of Radioisotope Methodology, Burgess Publishing Company, 1962, pages 87-90) to identify values which differed from the mean of a set by a statistically significant amount. Identified outliers were investigated to determine the reason(s) for the difference. If equipment malfunction or other valid physical reasons were identified as causing the variation, the anomalous result was excluded from the data set as non-representative. No data were excluded exclusively for failing Chauvenet's criterion. Data exclusions are discussed in this section under the appropriate sample type.

4-3

TABLE 4-3 DEVIATIONS FROM RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM COLLECTION AFFECTED DEVIATION CAUSE RESOLUTION PERIOD SAMPLES 02/28/05-03/07/05 Air sampling Heavy particulates on filter. Controlled burn by Land Contacted Land Dept. and station 107 Department. asked that GPC be notified prior to controlled burns.

1st Quarter 2005 TLD station 104 TLDs were underwater but were TLDs were underwater due to high Ensure the holder bags were dry in holder bags. river water levels. sealed and high river levels noted.

1 st Quarter 2005 TLD station 115 TLDs were underwater and were TLDs were underwater due to high Ensure the holder bags were wet in holder bags. river water levels. sealed and high river levels noted.

04/25/05-05/02/05 Air sampling Non-representative sample of Air sampling pump "locked up" for Exchanged pump motors.

station 103 airborne particulates. 106.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

2 nd Quarter 2005 TLD station 213 Direct radiation results not TLD destroyed during logging The TLDs were replaced at available. operations. the beginning of the quarter.

1st Semi-Annual Fish Collection Unable to collect fish during first High river levels existed up until Performed fish sampling Period of 2005 semi-annual period. next sampling collection period. when water levels permitted during second semi-annual period.

09/06/05-10/03/05 River Water River water collection volume Bad battery in autosampler and hole Battery replaced and tubing station #172 short by 25%. in collection tubing affected sample repaired.

volume.

3rd Quarter 2005 TLD station 213 TLDs missing at mid-quarter Tree cut down prior to mid-quarter. Put Blanks 1A and 1B in check. Blank IA looked Rodent chewed Blank 1A. place at mid-quarter. Tested damaged at end of quarter. end of quarter results which passed Chauvenet's Criterion.

4 th Quarter 2005 TLD station 104 TLDs missing at end of quarter. TLDs stolen from station. Replacement TLDs put in place at beginning of next quarter.

4.1 Land Use Census and River Survey In accordance with ODCM 4.1.2, a land use census was conducted on November 14 and 15, 2005, to determine the locations of the nearest permanent residence and milk animal in each of the 16 compass sectors within a distance of 5 miles, and the locations of all milk animals within a distance of 3 miles. A milk animal is defined as a cow or goat producing milk for human consumption. The locations of beef cattle and of gardens greater than 500 square feet producing broad leaf vegetation were also included in the census. The census results are tabulated in the Table 4.1-1 .

Table 4.1-1 LAND USE CENSUS RESULTS Distance in Miles to Nearest Location in Each Sector SECTOR J RESIDENCE l MILK ANIMAL BEEF CATTLE J GARDEN N 2.1 None None 3.8 NNE 2.9 None None 2.9 NE 3.3 None None None ENE 4.2 None 4.1 4.7 E 3.0 None None None ESE 3.8 None None None SE 1.8 None 2.3 3.3 SSE 2.0 None 2.2 2.1 S 1.0 None 2.3 2.3 SSW 1.1 None 2.0 2.7 SW 1.1 None 2.3 1.6 WSW 1.0 None 1.6 4.5 W 1.1 None 2.8 1.3 WNW 1.1 None None None NW 3.6 None 4.6 4.3 NNW 1.8 None 4.2 3.6 4-5

ODCM 4.1.2.2.1 requires a new controlling receptor to be identified if the land use census identifies a location that yields a calculated receptor dose greater than the one in current use. No change in the controlling receptor was required as a result of the 2005 land use census. The current controlling receptor as described in ODCM Table 3-7 is a child in the WSW Sector at 1.2 miles ODCM 4.1.2.2.2 requires that whenever the land use census identifies a location which would yield a calculated dose (via the same ingestion pathway) 20% greater than that of a current indicator station, the new location must become a REMP station (if samples are available). The 2005 land use census did not identify a garden which yielded a calculated dose 20% greater than that for any of the current indicator stations for vegetation. The results of the census were corroborated by inquiries to the county extension agents in the 5 counties in the vicinity of the plant.

As required by Note f of Table 2-1, the annual survey of the Altamaha River for 50 miles downstream of the plant was conducted on September 19, 2005 to identify any withdrawal of river water for drinking purposes. No sources of withdrawal for drinking water were identified. One source of withdrawal for irrigation purposes was found at a location approximately three and three-quarters miles downstream of the plant discharge. Further investigation revealed that the water was being used for farm crop irrigation. Information obtained from the Georgia Department of Natural Resources on September 22, 2005 indicated that no surface water withdrawal permit for drinking purposes had been issued for this stretch of the Altamaha River between the 2004 survey and the 2005 survey. Should it be determined that river water downstream of the plant is being used for drinking, the sampling and analysis requirements for drinking water found in Table 2-1 would be implemented.

4-6

4.2 Airborne As indicated in Table 2-2 and Figures 2-1 and 2-2, airborne particulates and airborne radioiodine are collected at 4 indicator stations (Nos. 103, 107, 112 and 116) which encircle the plant near the site periphery and at 2 control stations (Nos.

304 and 309) which are located approximately 10 miles from the main stack. At each location, air is continuously drawn through a glass fiber filter and a charcoal canister placed in series to collect airborne particulates and radioiodine. The filters and canisters are collected weekly and analyzed for gross beta and 1-131, respectively. A gamma isotopic analysis is performed quarterly on a composite of the filters for each station.

The 2005 annual average weekly gross beta concentration of 19.7 fCi/m 3 for the indicator stations was 0.4 fCi/m 3 greater than that for the control stations (19.3 fCi/m 3 ). This difference is not statistically discernible, since it is less than the calculated MDD of 1.93 fCi/m 3 . Figure 4.2-1 and Table 4.2-1 provide the historical trending of the average weekly gross beta concentrations in air. In general, there is close agreement between the results for the indicator and control stations. This close agreement supports the position that the plant is not contributing significantly to the gross beta concentration in air.

Figure 4.2-1 Average Weekly Gross Beta Air Concentration 300 250 E200 10 0

50150 0I I\ I I Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l -M DC -8 Indicator -r Controll 4-7 C0) -

Table 4.2-1 Average Weekly Gross Beta Air Concentration Year 1 Indicator Control

. (fCi/m3) (fCi/m3)

Pre-op 140 140 1974 87 90 1975 85 90 1976 135 139 1977 239 247 1978 130 137 1979 38 39 1980 49 48 1981 191 203 1982 33 34 1983 31 30 1984 26 28 1985 22 21 1986 36 38 1987 23 22 1988 22.6 21.7 1989 18.4 17.8 1990 19.3 18.7 1991 18.1 18 1992 18.5 18.4 1993 20.4 20.7 1994 19.5 19.7 1995 21.7 21.7 1996 21.3 21.4 1997 20.3 20.7 1998 20.0 20.5 1999 21.3 21.3 2000 23.6 23.9 2001 21.5 21.0 2002 19.3 19.2 2003 18.8 18.2 2004 21.4 21.3 2005 ;- 19.7 19.4 4-8

During 2005, no man-made radionuclides were detected from the gamma isotopic analysis of the quarterly composites of the particulate air filters. During preoperation and during operation through 1986, a number of fission products and activation products were detected. These were generally attributed to the nuclear weapons tests and to the Chernobyl incident. On only one occasion since 1986, has a man-made radionuclide been detected in a quarterly composite. A small amount of Cs-137 (1.7 fCi/m3) was identified in the first quarter of 1991 at Station 304. The MDC and RL for Cs-137 in air are 60 and 20,000 fCi/m3, respectively.

The historical trending of the average annual concentrations of detectable Cs-137 from quarterly air filter composites is provided in Figure 4.2-2 and Table 4.2-2.

Figure 4.2-2 Average Annual Cs-137 Concentration in Air en bU 50- -

R 40 -

-k 0

'_ 30 A P

f:

0 20 10 IIIlI tiI tII t-Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

- 4Indicator -U--Control - MDC 4-9

Table 4.2-2 Average Annual Cs-137 Concentration In Air Year 1 Indicator Control l (fCi/m3) l (fCi/m3)

Pre-op NDM 2.0 1974 1.5 2.0 1975 1.4 1.4 1976 0.6 0.7 1977 1.5 1.4 1978 2.3 2.6 1979 0.8 0.8 1980 0.4 0.6 1981 1.8 1.7 1982 0.5 0.6 1983 0.7 NDM 1984 NDM NDM 1985 0.7 NDM 1986 8.1 9.6 1987 NDM NDM 1988 NDM NDM 1989 NDM NDM 1990 NDM NDM 1991 NDM 1.7 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 7 2005 - NDM NDM 4-10

No airborne I-131 was detected in the charcoal canisters in 2005. During 1976, 1977, and 1978, positive levels of I-131 were found in nearly all of the samples collected for a period of a few weeks following atmospheric nuclear weapons tests.

Some of the concentrations were on the order of 70 fCi/m3 . In 1986, the same phenomenon occurred following the Chernobyl incident. The highest airborne 1-131 concentration found to date in an individual charcoal canister was 217 fCi/m3 in 1977. The MDC and RL for airborne 1-131 are 70 fCi/m3 and 900 fCi/m3 , respectively.

Table 4-3 lists REMP deviations that occurred in 2005. Two deviations involved air sampling. One of these deviations resulted in excluded data and is listed below.

For the period 2/28-3/7 at Station 107, heavy particulates were accumulated on the air filter resulting from a controlled burn by the Land Department. The sample results failed Chauvenet's Criterion and were excluded from the database.

4-11

4.3 Direct Radiation Direct (external) radiation is measured with thermoluminescent dosimeters (TLDs). Two Panasonic UD-814 TLD badges are placed at each station. Each badge contains three phosphors composed of calcium sulfate crystals (with thulium impurity). The gamma dose at each station is based upon the average readings of the phosphors from the two badges. The badges for each station are placed in thin plastic bags for protection from moisture while in the field. The badges are nominally exposed for periods of a quarter of a year (91 days). An inspection is performed near mid-quarter to assure that all badges are on-station and to replace any missing or damaged badges.

Two TLD stations are established in each of the 16 compass sectors around the plant to form 2 concentric rings, as seen in Figures 2-1 and 2-2. The two ring configuration of stations was established in 1980, in accordance with NRC Branch Technical Position "An Acceptable Radiological Environmental Monitoring Program", Revision 1, 1979. With the exception of the East sector, the inner ring stations (Nos. 101 through 116) are located near the site boundary and the outer ring stations (Nos. 201 through 216) are located at distances of 4 to 5 miles from the plant. The stations in the East sector are a few miles farther out than the other stations in their respective rings due to large swamps making normal access extremely difficult. The 16 stations forming the inner ring are designated as the indicator stations. The 3 control stations (Nos. 304, 309 and 416) are located 10 miles or more from the plant. Stations 064 and 301 monitor special interest areas.

Station 064 is located at the onsite roadside park, while Station 301 is located near the Toombs Central School. Station 210, in the outer ring, is located near the Altamaha School (the only other nearby school).

As provided in Table 3-1, the average quarterly exposure measured at the indicator stations (inner ring) during 2005 was 12.1 mR. At the control stations, the average quarterly exposure was 12.5 mR. This difference is not statistically discernible since it is less than the MDD of 0.92 mR.

The quarterly exposures acquired at the outer ring stations during 2005 ranged from 9.2 to 17.3 mR, with an average of 12.0 mR. The average for the outer ring stations was 0.5 rnR less than the average for the control stations. Since the results for the outer ring stations and the control stations differ by less than the MDD of 1.29 mR, there is no discernible difference between outer ring and control station results for 2005.

The historical trending of the average quarterly exposures for the indicator inner ring, outer ring, and the control stations are plotted in Figure 4.3-1 and listed in Table 4.3-1. The decrease between 1991 and 1992 values is attributed to a change in TLDs from Teledyne to Panasonic. It should be noted however that the differences between indicator and control and outer ring values did not change.

The close agreement between the station groups supports the position that the plant is not contributing significantly to direct radiation in the environment.

4-12

Figure 4.3-1 Average Quarterly Exposure from Direct Radiation 30 cc E

0 1o 0.

X w.

Po 74 75 76 77 78 79 80 81 82 83 84 855 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

Indicator --- Control A-Outer Ring 4-13 co5

Table 4.3-1 Average Quarterly Exposure from Direct Radiation Year l Indicator (mR) J Control (mR) J Outer Ring (mR)

Pre-op 22.3 23 NA 1974 23.2 25.6 NA 1975 10.0 10.5 NA 1976 8.18 6.9 NA 1977 7.31 6.52 NA 1978 6.67 6.01 NA 1979 5.16 6.77 NA 1980 4.44 5.04 4.42 1981 5.9 5.7 5.7 1982 12.3 12 11.3 1983 11.4 11.3 10.6 1984 13.3 12.9 11.9 1985 14.7 14.7 13.7 1986 15 14 14.5 1987 14.9 14.6 15.3 1988 15.0 14.7 15.2 1989 16.4 18.0 16.5 1990 14.9 13.9 14.7 1991 15.1 13.7 15.6 1992 11.9 10.9 12.3 1993 11.6 10.7 11.5 1994 1_1 10.7 11.2 1995 11.5 10.8 11.3 1996 11.6 11.3 11.6 1997 12.3 11.8 12.3 1998 12.1 12.3 12.3 1999 12.8 13.2 13.0 2000 13.6 13.3 13.3 2001 12.0 12.1 11.8 2002 11.7 11.7 11.5 2003 11.4 11.4 11.4 2004 12.2 12.4 12.2 2005 7 12.1, 12.5 12.0 4-14

The historical trending of the average quarterly exposures at the special interest areas for the past 19 years is provided in Figure 4.3-2 and listed in Table 4.3-2.

These exposures are within the range of those acquired at the other stations. They too, show that the plant is not contributing significantly to direct radiation at the special interest areas.

Figure 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 25 20 -

e 15 -

G) v 0-86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year Roadside Park (Sta 064) -- Toombs Central School (Sta 301) 4-15 COW

Table 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas Period 1Station 064 1Station 301 l (mR) l (mR) 1986 14.6 15.1 1987 14.2 15.0 1988 14.9 15.3 1989 16.1 16.6 1990 15.1 14.4 1991 14.4 15.2 1992 11.1 11.5 1993 11.2 10.8 1994 10.4 10.7 1995 11.0 10.5 1996 11.7 11.0 1997 12.6 11.4 1998 12.4 11.8 1999 12.5 12.4 2000 13.3 12.6 2001 11.8 11.3 2002 11.4 11.4 2003 11.2 11.1 2004 11.9 12.3

-2005 118 - 12.4 As seen in Table 4-3, there were five deviations involving direct radiation measurements in 2005. Three of these deviations led to the loss of direct radiation data. The TLDs at Station 104 were underwater (but still dry in the holder bags) at the first quarter change out. At Station 213, the TLDs were missing at the end of the second quarter and found to be destroyed during logging operations. The TLDs at Station 104 were missing at the end of the fourth quarter. The results from Station 104 at the end of the first quarter failed Chauvenet's Criterion and were excluded from the direct radiation database. The other two stations were excluded due to missing data.

The standard deviation for the quarterly result for each badge was subjected to a self imposed limit of 1.4. This limit is based upon the standard deviations obtained with the Panasonic UD-814 badges during 1992 and is calculated using a method developed by the American Society of Testing and Materials (ASTM 4-16

Special Technical Publication 15D, ASTM Manual on Presentation of Data and Control Chart Analysis, Fourth Revision, Philadelphia, PA, October 1976).

The limit serves as a flag to initiate an investigation. To be conservative, readings with a standard deviation greater than 1.4 are excluded from the data set since the high standard deviation is interpreted as an indication of unacceptable variation in TLD response. In 2005, the following TLD results were excluded from the data set because their standard deviations were greater than 1.4:

First Quarter None Second Quarter 103A and 21 1A Third Quarter None Fourth Quarter 212B For these stations, the reading of the companion badge at each location was used to determine the quarterly exposure.

During 2005, no direct radiation station experienced both badges having standard deviations above the self-imposed limit of 1.4. For those instances in which one badge at a station exhibited a standard deviation greater than 1.4, the other badge of the two-badge set was available to give a valid reading for the particular location.

4-17

4.4 Milk Milk samples are obtained biweekly from Station 304 (the state prison dairy) which is a control station located more than 10 miles from the plant. Gamma isotopic and 1-131 analyses are performed on each sample as specified in Tables 2-1 and 2-2. Since 1989, efforts to locate a reliable milk sample source within 5 miles of the plant have been unsuccessful.

During 2005, as in the previous 13 years, no man-made radionuclides were detected from the gamma isotopic analysis of the milk samples. Except for 1987, Cs- 137 was found in some of the samples each year from 1978 (when this analysis became a requirement) through 1989. No other man-made radionuclides have been detected by this analysis.

The MDC and RL for Cs-137 in milk are 18 and 70 pCi/l, respectively. The historical trending of the average annual detectable Cs- 137 concentration in milk is provided in Figure 4.4-1 and Table 4.4-1.

Figure 4.4-1 Average Annual Cs-137 Concentration in Milk 25-20 C.

0)110.° - -- --

0

,c5 t--__-g/ S .l_

Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l Indicator -- -- Control - MDC 4-18 C07

Table 4.4-1 Average Annual Cs-137 Concentration in Milk Year 1 Indicator l Control (pi/) (pCI)

Pre-op 19.9 19.4 1974 NDM NDM 1975 NDM NDM 1976 NDM NDM 1977 NDM NDM 1978 12.1 18.3 1979 16.1 13 1980 14.7 15.4 1981 12.57 10.2 1982 11.8 11 1983 12 7.2 1984 9.6 10.2 1985 9.14 5.35 1986 9.8 10 1987 NDM NDM 1988 10.9 NDM 1989 8.6 7.9 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 20 NDM NDM 4-19

During 2005 as in the previous 15 years, 1-131 was not detected in any of the milk samples. During preoperation, all readings were less than 2 pCi/1 which was the allowed MDC at that time. Figure 4.4-2 and Table 4.4-2 provide the historical trending of the average annual detectable concentration of 1-131 in milk. In 1988, a single reading of 0.32 pCi/l, which was believed to have resulted from a procedural deficiency, was reported. The MDC and RL for I- 131 in milk are 1 and 3 pCi/l, respectively.

All the detectable results for Cs-137 and I-131 are attributed to fallout from the nuclear weapons tests and the Chernobyl incident.

Figure 4.4-2 Average Annual 1-131 Concentration in Milk 12 C.

0.

4-C 6 -I G) 0 4 I I I I I I 2 i

.T II I Im 0 -- -- - -- -

Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l -4Indicator --- Control - MDC RL 4-20

Table 4.4-2 Average Annual 1-131 Concentration in Milk 1

J1 Year Indicator Control l (pCi/i) (pCi/)

Pre-op NDM NDM 1974 0.98 2.6 1975 0.3 NDM 1976 12.23 9.1 1977 14.61 4.08 1978 2.72 4.18 1979 NDM NDM 1980 1.26 0.69 1981 NDM NDM 1982 NDM NDM 1983 NDM NDM 1984 NDM NDM 1985 NDM NDM 1986 8.9 7.6 1987 NDM NDM 1988 NDM 0.32 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM 4-21

4.5 Vegetation In accordance with Tables 2-1 and 2-2, grass samples are collected monthly from two indicator stations near the site boundary (Nos. 106 and 112) and at one control station located about 21 miles from the plant (No. 416). Gamma isotopic analyses are performed on each sample. Gamma isotopic analysis on vegetation samples began in 1978 when the analysis became a TS requirement.

The results presented in Table 3-1 show that Cs-137 was the only man-made radionuclide detected in vegetation samples during 2005. Cs-137 was detected in twelve samples collected at the indicator stations at an average value of 47.7 pCi/kg-wet; three samples collected at the control station had detectable Cs-137 at 39.8 pCi/kg-wet. The difference of 7.9 pCi/kg/wet between the control and the indicator averages is not statistically discernible since it is less than the MDD of 45.2 pCi/kg-wet.

Since 1986, Cs-137 has been the only man-made radionuclide found in vegetation samples. The MDC and RL for Cs-137 in vegetation samples are 80 pCi/kg-wet and 2000 pCi/kg-wet, respectively. The occasional presence of Cs-137 in vegetation samples is attributed primarily to fallout from nuclear weapons tests and the Chernobyl incident.

Figure 4.5-1 and Table 4.5-1 provide the historical trending of the average annual detectable Cs-137 concentration found in vegetation. Since 1978, the Cs-137 concentration has been on a decline, and since about 1989, generally occurring below the required MDC and very close to detectable levels.

4-22

Figure 4.5-1 Average Annual Cs-137 Concentration in Vegetation 1200 1000 --

0 0.

.20 aYe-Iniatr m Cotol - D 4-23 cU0 ,

Table 4.5-1 Average Annual Cs-137 Concentration in Vegetation Year Indicator 1 Control (pCi/kg-wet) (pCi/kg-wet)

Pre-op 55 30 1974 NDM NDM 1975 NDM NDM 1976 NDM NDM 1977 NDM NDM 1978 112 1089 1979 59 695 1980 208 916 1981 182 152 1982 65 99 1983 95 211 1984 149 388 1985 60.9 113.3 1986 80 215 1987 60 428 1988 40.1 228.8 1989 37 NDM 1990 66.7 34.5 1991 34.1 36.1 1992 35.2 41.3 1993 24.7 45.8 1994 32.2 46.6 1995 49.8 47.6 1996 47.2 41.1 1997 48.4 54.9 1998 81.4 44.1 1999 26.9ND 2000 NDM NDM 2001 NDM NDM 2002 33.7 41.1 2003 61.0 62.8 2004 41.6 43.5 2005 47.7 39.8:

4-24

4.6 River Water Surface water from the Altamaha River is obtained at an upstream location (Station 170) and at a downstream location (Station 172) using automatic samplers. Small quantities are drawn at intervals not exceeding a few hours. The samples drawn are collected monthly and quarterly composites are produced from the monthly collections.

As specified in Table 2- 1, a gamma isotopic analysis is conducted on each monthly sample. No man-made radionuclides were detected during 2005. The only man-made radionuclides previously detected are presented in the table below.

Year I

Quarter I

Station ]

I Radionuclide I I

Level (pCi/I) 1975 4th 172 Ce-141 78.2 1986 2nd 170 La-140 18.0 1986 2nd 172 Cs-137 12.0 1988 2nd 170 Cs- 137 6.8 A tritium analysis is performed on the quarterly composite. Prior to 1986, positive results were usually found in each quarterly composite at levels generally ranging from 200 and 400 pCi/l which is very close to background environmental levels (approximately 100-300 pCi/l). Subsequently, the number of positive results have diminished.

In 2005, tritium was not detected in any of the four quarterly samples at the upstream (control) location. Tritium was detected in two of the four quarterly samples at the downstream (indicator) location. The average of the two indicator samples was 245 pCi/l (the range was 215-275 pCi/l). This could be attributed to plant effluents since tritium was not detected at the control station in 2005.

However, these low levels are very close to background environmental levels. The MDC and RL for tritium in river water are 3000 and 30,000 pCi/l, respectively.

Figure 4.6-1 and Table 4.6-1 provide the historical trending of the annual average detectable tritium concentration in river water.

The annual 50 mile downstream survey of the Altamaha River to determine if river water is being withdrawn for drinking purposes is discussed in Section 4.1.

4-25

Figure 4.6-1 Average Annual H-3 Concentration in River Water 350 10 -1 I-I I I I-30C0 - -I S 25C 0

C 20C 0

j?4 1 _ ________1~~~~

5 15C 5C Do . I I 10 I - -

IQo0 A) AA 1 9 b Year I + Indicator -U-Control -MDC I 4-26 QO

Table 4.6-1 Average Annual H-3 Concentration in River Water Year Indicator Control l (pCi/i) I (pCi/i)

Pre-op 210 191 1974 230 205 1975 205 238 1976 165 153 1977 189 170 1978 224 193 1979 210 180 1980 358 218 1981 220 135 1982 165 220 1983 265 328 1984 437 327 1985 288 220 1986 242 206 1987 241 204 1988 220 NDM 1989 NDM NDM 1990 139 NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 200 NDM 1996 144 147 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 209 NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM 261 2004 206 302 7 2005 245 NDM 4-27

4.7 Fish Gamma isotopic analyses were performed on the edible portion of the fish samples collected at the river stations on November 03, 2005. The control station (No.

170) is located upstream of the plant while the indicator station (No. 172) is located downstream. Fish are usually collected in the spring as well. However, the river levels were too high to support fish sampling during the first semi-annual period of 2005.

As shown in Table 3-1, Cs-137 was the only man-made radionuclide detected in fish during 2005. The average concentration of 13.0 pCi/kg-wet at the indicator station was 0.3 pCi/kg-wet less than the average concentration found at the control station (13.3 pCi/kg-wet). This difference is not statistically discernible since it is less than the calculated MDD of 25.1 pCi/kg-wet. Cs-137 in fish samples is attributed primarily to weapons testing and the Chernobyl incident. The MDC and RL for Cs- 137 in fish are 150 and 2000 pCi/kg-wet, respectively.

The historical trending of the average annual detectable Cs-137 concentration in fish is provided in Figure 4.7-1 and Table 4.7-1. Figure 4.7-1 indicates, in general, a decline in the Cs-137 levels after 1983. (Note: From 1979 through 1982, clams were collected rather than fish.)

Figure 4.7-1 Average Annual Cs-137 Concentration in Fish 160 --

140 --

10,

~120 0,

0.

0 1

.2 Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year 2-+-Indicator --- F- Control -Mx 4-28

Table 4.7-1 Average Annual Cs-137 Concentration in Fish Year Indicator Control l (pCi/kg-wet) (pCi/kg-wet)

Pre-op 90 115 1974 134 61 1975 80.6 89.4 1976 73 88 1977 76 91 1978 88 47 1979 NDM NDM 1980 NDM NDM 1981 NDM NDM 1982 NDM NDM 1983 138.6 67.5 1984 84 53 1985 117 63.3 1986 79 44 1987 62 52 1988 77.8 33.3 1989 34.3 28.9 1990 26.7 24.2 1991 32.9 26.9 1992 41.6 28.8 1993 38.0 25.9 1994 23.8 20.7 1995 25.0 27.9 1996 20.4 18.0 1997 29.4 15.1 1998 26.1 17.7 1999 22.3 13.5 2000 17.9 25.3 2001 20.8 10.2 2002 18.2 13.0 2003 13.1 7.1 2004 11.6 18.8 2105 13.0 13.3 4-29

In the past, the only other man-made radionuclides detected in fish samples were Co-60 and Cs-134. During preoperation, Co-60 was detected in one fish sample at a very low concentration. During the period of 1983 through 1988, Cs-134 was found in about half of the samples at concentrations of the same order of magnitude as those found for Cs-137. The Co-60 and Cs-134 levels found in these samples are attributed to the nuclear weapons tests and the Chernobyl incident.

Figure 4.7-2 and Table 4.7-2 show the historical trending of the annual average detectable concentration of Cs- 134 in fish.

Figure 4.7-2 Average Annual Cs-134 Concentration in Fish C._

0.

C 8

0..

0)

C) 0 0

Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I *Indicator --- Control - MDC 4-30

Table 4.7-2 Average Annual Cs-134 Concentration in Fish Year l Indicator Control

_ (pCi/kg-wet) (pCi/kg-wet)

Pre-op NDM NDM 1974 NDM NDM 1975 NDM NDM 1976 NDM NDM 1977 NDM NDM 1978 NDM NDM 1979 NDM NDM 1980 NDM NDM 1981 NDM NDM 1982 NDM NDM 1983 101.8 NDM 1984 35.8 26.3 1985 46.7 21.1 1986 29 NDM 1987 69 15 1988 21.7 6.9 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM 4-31

4.8 Sediment Sediment was collected along the shoreline of the Altamaha River on August 1 and November 7, 2005, at the upstream control station (No. 170) and the downstream indicator station (No. 172). A gamma isotopic analysis was performed on each sample.

Co-60 was not found in sediment samples in 2005. With the exception of six years, Co-60 has been found at either the indicator or the control station every year since 1986. There is no RL or MDC assigned to Co-60 in sediment in ODCM Tables 4-2 and 4-3 (Tables 4-2 and 4-1 of this report). The MDC assigned by the EL for Co-60 in sediment is 70 pCi/kg-dry. The historical trending of the average annual detectable Co-60 concentration in sediment is provided in Figure 4.8-1 and Table 4.8-1.

Figure 4.8-1 Average Annual Co-60 Concentration in Sediment 250

- 200 III Xl U 150 a.

0 1t X X-100 U) 0 _ 111 I L_ II lTI Li 50 0 IQ I I I IF-F.

l) LF- L HF- I-Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

--- Indicator -U--Control MDC 4-32

Table 4.8-1 Average Annual Co-60 Concentration in Sediment Year Indicator T Control

_ (pCi/kg-dry) I (pCi/kg-dry)

Pre-op NDM NDM 1974 NDM NDM 1975 NDM NDM 1976 NDM NDM 1977 NDM NDM 1978 NDM NDM 1979 NDM NDM 1980 NDM NDM 1981 NDM NDM 1982 NDM NDM 1983 NDM NDM 1984 NDM NDM 1985 NDM NDM 1986 108 33 1987 NDM NDM 1988 67.8 NDM 1989 NDM 31 1990 33 19 1991 123.6 NDM 1992 81.4 NDM 1993 70.7 NDM 1994 218 NDM 1995 NDM NDM 1996 118.5 NDM 1997 NDM NDM 1998 79.4 NDM 1999 107.7 NDM 2000 70.0 NDM 2001 58.1 NDM 2002 NDM NDM 2003 NDM 31.5 2004 NDM NDM 2005 NDM NDM Co-60 was not detected in sediment samples near the plant until 1986, the year of the Chernobyl incident. However, because Co-60 has been detected in indicator station samples more often than in control station samples in recent years, some contribution from plant effluents cannot be ruled out.

4-33

In 2005, Cs- 137 was detected in both indicator and control station sediment samples. It has been found in over 95% of all of the sediment samples collected back through preoperation, and is generally attributed to the atmospheric nuclear weapons tests or to the Chernobyl incident. As shown in Table 3- 1, the average at the indicator station was 57.2 pCi/kg-dry and at the control station the average was 30.3 pCi/kg-dry. However, the difference (26.9 pCi/kg-dry) between the stations is not statistically discernible since it is less than the MDD of 144 pCi/kg-dry. The MDC for Cs- 137 in sediment is 180 pCilkg-dry. The historical trending of the average annual detectable Cs- 137 concentration in sediment is provided in Figure 4.8-2 and Table 4.8-2.

Figure 4.8-2 Average Annual Cs-i137 Concentration in Sediment 1000 . . . . . . . . . .

41111 I . . . . . . . . . . . . . .. . . . . . . . . . . . . . .

__ 800 . . . . . . . . . . . - . . . . . . . . . . I .

a.-

la

.x oj 700 600 I I I I II III 0.

r- 500 ... . . 11 .1.1 0

&. 400 IMI I I I I 1111 I I U)

U 300 11LN

.1- 11111 L LU JE ....E 0

oj 200 I Il'~ I0 f

I/ II 100

-1 I WX if I I V . . 1. - . . .- I 0

0 . . . . . . &:z1 Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I-0---Indicator -U-- Control - MDC 4-34

Table 4.8-2 Average Annual Cs-137 Concentration in Sediment Year Indicator Control (pCi/kg-dry) (pCi/kg-dry)

Pre-op 170 270 1974 218 57 1975 330 615 1976 211 300 1977 364 200 1978 330 260 1979 NDM 310 1980 240 NDM 1981 590 110 1982 141 285 1983 384 365 1984 500 260 1985 76.5 269 1986 238 190 1987 59 39 1988 903 114 1989 56 62 1990 130.5 66 1991 43.1 54.5 1992 151 198.5 1993 113 115 1994 127 104 1995 52.3 80.6 1996 106 110 1997 186 137 1998 148.5 101.4 1999 92 111.8 2000 68.1 114.5 2001 68.7 69.6 2002 68.1 62.8 2003 57.3 106 2004 59.5 57.1

-2005- 57.2 30.3 4-35

Other man-made nuclides, besides Co-60 and Cs-137, were occasionally found in past years. Their presence was generally attributed to the nuclear weapons tests or to the Chernobyl incident, although plant releases were not ruled out. Mn-54, Co-58, and Zn-65, which have relatively short half-lives, are most likely a result of plant releases and have been plotted in Figure 4.8-3 along with their MDCs. All the man-made nuclides detected in sediment except for Co-60 and Cs-137 have been listed in Table 4.8-3. The Cs-134 MDC (150 pCi/kg-dry) is defined in ODCM Table 4-3 (Table 4-1 of this report). The MDCs for Mn-54 (42 pCi/kg-dry) and Zn-65 (129 pCi/kg-dry) were determined by the EL since no values are provided in ODCM Table 4-3.

Figure 4.8-3 Average Annual Indicator Station Concentrations of Select Nuclides in Sediment 600

_ 500 L.-

.. 400 C 300 0

I-0 E 200 5) 0 I I I_ = I 11 = I I 0 100 0

Po 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

Mn-54 -U- -Zn-65 A Cs-134

-Mn-MDC -Zn-MDC Cs-MDC 4-36 L

Table 4.8-3 Sediment Nuclide Concentrations Other Than Co-60 & Cs-137 Nuclide YEAR l Indicator Control (pCi/kg-dry) (pCi/kg-dry)

Ce-141 1976 340 254 1977 141 Ce-144 Preop 720 1974 363 1975 342 389 1978 700 1981 1290 Co-58 1994 22.2 Cs-134 Preop 40 1981 280 1984 130 40 1986 132 1988 505 1990 31 Mn-54 1975 36.1 1986 28 26 1991 57.2 1996 77.7 Ru-103 1974 81 1976 158 1977 195 1981 220 Zn-65 1986 175 1988 136 1991 250.5 1992 83 1993 39.9 1994 332 Zr-95 Preop 180 1974 138 1976 427 170 1977 349 294 1978 220 230 1981 860 280 4-37

5.0 INTERLABORATORY COMPARISON PROGRAM In accordance with ODCM 4.1.3, the EL participates in an ICP that satisfies the requirements of Regulatory Guide 4.15, Revision 1, "Quality Assurance for Radiological Monitoring Programs (Normal Operations) - Effluent Streams and the Environment", February 1979. The guide indicates the ICP is to be conducted with the Environmental Protection Agency (EPA) Environmental Radioactivity Laboratory Intercomparison Studies (Cross-check) Program or an equivalent program, and the ICP should include all of the determinations (sample medium/radionuclide combinations) that are offered by the EPA and included in the REMP.

The ICP is conducted by Analytics, Inc. of Atlanta, Georgia. Analytics has a documented Quality Assurance (QA) program and the capability to prepare Quality Control (QC) materials traceable to the National Institute of Standards and Technology. The ICP is a third party blind testing program which provides a means to ensure independent checks are performed on the accuracy and precision of the measurements of radioactive materials in environmental sample matrices.

Analytics supplies the crosscheck samples to the EL which performs the laboratory analyses in a normal manner. Each of the specified analyses is performed three times. The results are then sent to Analytics who performs an evaluation which may be helpful to the EL in the identification of instrument or procedural problems.

The samples offered by Analytics and included in the EL analyses are gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples.

The accuracy of each result is measured by the normalized deviation, which is the ratio of the reported average less the known value to the total error. The total error is the square root of the sum of the squares of the uncertainties of the known value and of the reported average. The uncertainty of the known value includes all analytical uncertainties as reported by Analytics. The uncertainty of the reported average is the propagated error of the values in the reported average by the EL.

The precision of each result is measured by the coefficient of variation, which is defined as the standard deviation of the reported result divided by the reported average. An investigation is undertaken whenever the absolute value of the normalized deviation is greater than three or whenever the coefficient of variation is greater than 15% for all radionuclides other than Cr-51 and Fe-59. For Cr-51 and Fe-59, an investigation is undertaken when the coefficient of variation exceeds the values shown as follows:

Nuclide Concentration

Total Sample Activity Percent Coefficient (pCi) of Variation Cr-51 <300 NA 25 Cr-51 NA >1000 25 Cr-51 >300 <1000 15 Fe-59 <80 NA 25 Fe-59 >80 NA 15

For air filters, concentration units are pCi/filter. For all other media, concentration units are pCi/liter (pCi/l).

5-1

As required by ODCM 4.1.3.3 and 7.1.2.3, a summary of the results of the EL's participation in the ICP is provided in Table 5-1 for: the gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples. Delineated in this table for each of the media/analysis combinations, are: the specific radionuclides; Analytics' preparation dates; the known values with their uncertainties supplied by Analytics; the reported averages with their standard deviations; and the resultant normalized deviations and coefficients of variation expressed as a percentage.

In 2005, the laboratory analyzed 9 samples for 46 parameters and completed a gamma analysis investigation of Fe-59 in water. The 2005 analyses included tritium, gross beta, Fe-55, Sr-89/90 and gamma emitting radio-nuclides in different matrices. Two analyses were outside the control limit for precision. The precision deviations were for the determination of gross alpha in water and Sr-90 in an air filter.

The gross alpha in water was analyzed in triplicate with an average value reported.

The high range may be attributed to one of the samples not dispersing evenly in the planchet causing alpha absorption. The second quarter alpha sample was in control so no further investigation will be performed. The second quarter air filter sample analyzed for Sr-90 had a high precision value. The low activity in the sample produced small detector counts, thus causing the elevated error. No further investigation will be performed.

The 2004 Fe-59 analysis in water investigation was completed. The efficiencies used in determining the activity were obtained from a calibration curve. The curve was determined to be lower at higher energies due to summing effects from the calibration nuclides. A curve will be produced using a standard containing nuclides without summing gamma energies. The difference in efficiencies of the curves will be applied to the analysis to compensate for the summing losses. This is a known bias for gamma spectroscopy measurements and does not significantly effect radiological environmental monitoring measurements.

5-2

TABLE 5-1 (SHEET 1 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GROSS BETA ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysis or Date Reported Known Standard Uncertainty Percent Coef Normalized Radionuclide Prepared Average IValue IDeviation EL Analytics (3S) lof Variation TDeviation Gross Beta J09/15/05 J75.00 F71.80] 2.90] 0.80] 5.601 0.77 GAMMA ISOTOPIC ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysis or 1Date l Reported { Known l Standard l Uncertainty l Percent Coef FNormalized Radionuclide Prepared Average Value I Deviation EL Analytics (3S) of Variation [ Deviation Ce-141 09/15/05 161.80 163.00 5.42 1.82 4.69 -0.16 Co-58 09/15/05 46.30 44.50 4.79 0.49 12.39 0.31 Co-60 09/15/05 113.20 117.00 1.06 1.30 3.80 -0.88 Cr-51 09/15/05 260.80 237.00 6.53 2.63 8.14 1.12 Cs-134 09/15/05 80.00 85.70 3.86 0.95 6.27 -1.14 Cs-137 09/15/05 145.60 137.00 8.07 1.52 6.67 0.89 Fe-59 09/15/05 53.40 42.70 3.91 0.49 11.03 1.82 Mn-54 09/15/05 70.40 64.50 1.22 0.72 5.11 1.65 Zn-65 09/15/05 105.10 86.50 5.51 0.96 7.88 2.24 GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or Date l Reported l Known l Standard [Uncertainty l Percent Coef l Normalized Radionuclide l Prepared Average l Value I Deviation EL Analytics (3S) l of Variation l Deviation Ce-141 06/09/05 97.60 92.40 12.37 1.03 7.95 0.67 Co-58 06/09/05 NA NA NA NA NA NA Co-60 06/09/05 144.20 145.00 5.62 1.61 5.94 -0.09 Cr-51 06/09/05 286.60 303.00 28.38 3.37 15.87 -0.36 Cs-134 06/09/05 93.10 95.00 6.43 1.06 8.75 -0.24 Cs-137 06/09/05 194.30 189.00 6.24 2.10 5.60 0.49

TABLE 5-1 (SHEET 2 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or 1Date Reported l Known 1Standard 1Uncertainty I Percent Coef Normalized Radionuclide I Prepared I Average I Value I Deviation EL I Analytics (3S) I of Variation I Deviation Fe-59 06/09/05 70.30 63.90 8.92 0.71 l 17.92 l 0.51 1-131 06/09/05 93.00 86.90 6.93 0.97 10.63 0.61 Mn-54 06/09/05 127.70 125.00 3.73 1.39 6.61 0.31 Zn-65 06/09/05 163.50 155.00 12.09 1.72 10.90 0.48 GROSS BETA ANALYSIS OF WATER SAMPLE (pCi/liter)

GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or I Date Reported l Known l Standard I Uncertainty Percent Coef I Normalized Radionuclide Prepared l Average I Value I Deviation EL I Analytics (3S) I of Variation I Deviation Ce-141 03/17/05 222.00 221.00 9.6 2.46 5.13 0.09 Co-58 03/17/05 115.40 111.00 7.4 1.24 9.21 0.41 Co-60 03/17/05 142.80 139.00 6.4 1.54 7.91 0.34 Cr-51 03/17/05 370.30 322.00 46.1 3.57 14.70 0.89 Cs-134 03/17/05 138.60 134.00 6.1 1.49 5.46 0.61

TABLE 5-1 (SHEET 3 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or I Date 1Reported f Known Standard I Uncertainty I Percent Coef I Normalized Radionuclide I Prepared I Average I Value I Deviation EL I Analytics (3S) I of Variation j Deviation Cs-137 03/17/05 131.40 125.00 7.3 1.39 6.53 0.75 Fe-59 03/17/05 125.60 107.00 9.5 1.19 12.06 1.23 1-131 03/17/05 76.10 65.90 7.1 0.73 11.84 1.13 Mn-54 03/17/05 157.00 154.00 8 1.71 5.63 0.34 Zn-65 03/17/05 219.60 191.00 14.9 2.12 10.82 1.20 TRITIUM ANALYSIS OF WATER SAMPLES (pCi/liter)

6.0 CONCLUSION

S This report confirms the licensee's conformance with the requirements of Chapter 4 of the ODCM during 2005. It provides a summary and discussion of the results of the laboratory analyses for each type of sample.

All of the radiological levels were low and are generally trending downward.

In 2005, there was one sample type where the indicator station readings were discernible from the control station readings. Two of four quarterly composite samples from the river water indicator station were positive for tritium. The average value of the two positive samples was 245 pCi/l. There were no positive values at the control station. Therefore, this tritium concentration could be attributed to plant releases.

Although no drinking water pathway via river water exists in the plant vicinity, a potential dose from tritium due to drinking water was calculated using methodology from the HNP ODCM. This dose was calculated assuming that a person regularly consumed drinking water from the river downstream of the plant discharge near the indicator station. Under these assumed circumstances, the potential dose to such an individual would be about 1.9E-2 mrem in a year. This dose would be less than 1% of the annual dose limit (3 mrem) for the total body, due to liquid effluents.

Another pathway to obtain dose from tritium in the river would be through consumption of fish. The potential total body dose for an adult who consumed fish regularly from the river would be about 4.9E-4 mrem in a year. This extremely small dose is less than 0.02% of the annual limit for the total body due to liquid effluents.

A third pathway to potentially obtain dose from tritium in the river would be from consumption of crops which were irrigated by river water. In 2005, there was one irrigation withdrawal noted in the annual River Water User's Survey (discussed in Section 4.1). The location was about 3.75 miles downstream of the plant. The potential dose to a member of the public who would receive the highest dose from regular consumption of crops which were irrigated with river water would be 5.7E-3 mrem in a year. This extremely small dose is less than 0.2% of the annual limit for the total body due to liquid effluents.

No discernible radiological impact upon the environment or the public as a consequence of plant discharges to the atmosphere or to the river was established for any other REMP samples for 2005.

6-1

ENCLOSURE 2 Joseph M. Farley Nuclear Plant Annual Radiological Environmental Operating Report for 2005

JOSEPH M. FARLEY NUCLEAR PLANT ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2005 i- 17 21-SOUTHERN A COMPANY Energy to Serve Your World"

TABLE OF CONTENTS Section and/or Title Subsection Page List of Figures ii List of Tables iii List of Acronyms iv 1.0 Introduction 1-1 2.0 REMP Description 2-1 3.0 Results Summary 3-1 4.0 Discussion of Results 4-1 4.1 Land Use Census 4-6 4.2 Airborne 4-7 4.3 Direct Radiation 4-13 4.4 Milk 4-17 4.5 Forage 4-21 4.6 Ground Water 4-26 4.7 Surface Water 4-29 4.8 Fish 4-32 4.9 Sediment 4-37 5.0 Interlaboratory Comparison Program (ICP) 5-1 6.0 Conclusions 6-1 i

LIST OF FIGURES Figure Number Title Page Figure 2-1 REMP Stations Near the Plant Perimeter 2-9 Figure 2-2 REMP Stations 2 to 5 Miles from the Plant 2-10 Figure 2-3 REMP Stations Beyond 5 Miles from the Plant 2-11 Figure 4.2-1 Average Weekly Gross Beta Air Concentration 4-8 Figure 4.2-2 Average Annual Cs-137 Concentration in Air 4-10 Figure 4.3-1 Average Quarterly Exposure from Direct Radiation4-14 Figure 4.4-1 Average Annual Cs-137 Concentration in Milk 4-17 Figure 4.4-2 Average Annual I- 131 Concentration in Milk 4-19 Figure 4.5-1 Average Annual Cs-137 Concentration in Forage 4-22 Figure 4.5-2 Average Annual I-131 Concentration in Forage 4-24 Figure 4.6-1 Average Annual H-3 Concentration in Ground Water 4-27 Figure 4.7-1 Average Annual H-3 Concentration in Surface Water 4-30 Figure 4.8-1 Average Annual Cs-137 Concentration in Bottom Feeding Fish 4-33 Figure 4.8-2 Average Annual Cs-137 Concentration in Game Fish 4-35 Figure 4.9-1 Average Annual Cs- 134 Concentration in Sediment 4-38 Figure 4.9-2 Average Annual Cs-137 Concentration in Sediment 4-39 ii

LIST OF TABLES Table Number Title Page Table 2-1 Summary Description of Radiological Environmental Monitoring Program 2-2 Table 3-1 Radiological Environmental Monitoring Program Annual Summary 3-2 Table 4-1 Minimum Detectable Concentrations (MDC) 4-1 Table 4-2 Reporting Levels (RL) 4-2 Table 4-3 Deviations from Radiological Environmental Monitoring Program 4-4 Table 4.1-1 Land Use Census Results 4-6 Table 4.2-1 Average Weekly Gross Beta Air Concentration 4-9 Table 4.2-2 Average Annual Cs-137 Concentration in Air 4-11 Table 4.3-1 Average Quarterly Exposure from Direct Radiation 4-15 Table 4.4-1 Average Annual Cs-137 Concentration in Milk 4-18 Table 4.4-2 Average Annual 1-131 Concentration in Milk 4-20 Table 4.5-1 Average Annual Cs-137 Concentration in Forage 4-23 Table 4.5-2 Average Annual 1-131 Concentration in Forage 4-25 Table 4.6-1 Average Annual H-3 Concentration in Ground Water 4-28 Table 4.7-1 Average Annual H-3 Concentration in Surface Water 4-31 Table 4.8-1 Average Annual Cs-137 Concentration in Bottom Feeding Fish 4-34 Table 4.8-2 Average Annual Cs-137 Concentration in Game Fish 4-36 Table 4.9 Sediment Nuclide Concentrations 4-37 Table 5-1 Interlaboratory Comparison Program Results 5-3 iii

LIST OF ACRONYMS Acronyms presented in alphabetical order Acronym Definition APCo Alabama Power Company ASTM American Society for Testing and Materials CL Confidence Level EL Georgia Power Company Environmental Laboratory EPA Environmental Protection Agency FNP Joseph M. Farley Nuclear Plant ICP Interlaboratory Comparison Program MDC Minimum Detectable Concentration MDD Minimum Detectable Difference MWe MegaWatts Electric NA Not Applicable NDM No Detectable Measurement(s)

NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual Po Preoperation PWR Pressurized Water Reactor REMP Radiological Environmental Monitoring Program RL Reporting Level RM River Mile TLD Thermoluminescent Dosimeter TS Technical Specification iv

1.0 INTRODUCTION

The Radiological Environmental Monitoring Program (REMP) for 2005 was conducted in accordance with Chapter 4 of the Offsite Dose Calculation Manual (ODCM). The REMP activities for 2005 are reported herein in accordance with Technical Specification (TS) 5.6.2 and ODCM 7.1.

The objectives of the REMP are to:

1) Determine the levels of radiation and the concentrations of radioactivity in the environs and;

2) Assess the radiological impact (if any) to the environment due to the operation of the Joseph M. Farley Nuclear Plant (FNP).

The assessments include comparisons between results of analyses of samples obtained at locations where radiological levels are not expected to be affected by plant operation (control stations) and at locations where radiological levels are more likely to be affected by plant operation (indicator stations), as well as comparisons between preoperational and operational sample results.

FNP is owned by Alabama Power Company (APCo) and operated by Southern Nuclear Operating Company. It is located in Houston County, Alabama approximately fifteen miles east of Dothan, Alabama on the west bank of the Chattahoochee River. Unit 1, a Westinghouse Electric Corporation Pressurized Water Reactor (PWR) with a licensed core thermal power output of 2775 MegaWatts thermal (MWt), achieved initial criticality on August 9, 1977 and was declared "commercial" on December 1, 1977. Unit 2, also a 2775 MWt Westinghouse PWR, achieved initial criticality on May 8, 1981 and was declared "commercial" on July 30, 1981.

The preoperational stage of the REMP began with initial sample collections in January of 1975. The transition from the preoperational to the operational stage of the REMP was marked by Unit 1 initial criticality.

A description of the REMP is provided in Section 2 of this report. An annual summary of the results of the analyses of REMP samples is provided in Section 3.

A discussion of the results, including assessments of any radiological impacts upon the environment and the results of the land use census are provided in Section 4. The results of the Interlaboratory Comparison Program (ICP) are provided in Section 5. Conclusions are provided in Section 6.

1-1

2.0 REMP DESCRIPTION A summary description of the REMP is provided in Table 2-1. This table summarizes the program as it meets the requirements outlined in ODCM Table 4-1. It details the sample types to be collected and the analyses to be performed in order to monitor the airborne, direct radiation, waterborne and ingestion pathways, and also delineates the collection and analysis frequencies. In addition, Table 2-1 describes the locations of the indicator, community and control stations as described in ODCM Table 4-4 and the identification of each sample according to station location and analysis type. The stations are also depicted on maps in Figures 2-1 through 2-3.

The location of each REMP station for gaseous releases is described by its direction and distance from a point midway between the Unit 1 and Unit 2 plant vent stacks. The surrounding area is divided into 16 azimuthal sectors which are centered on the major compass points; each sector is numbered sequentially clockwise and oriented so that the centerline of sector 16 is due north. Each sampling station is identified by a four digit number. The first two digits indicate the sector number, and the last two digits indicate the distance from the origin to the nearest mile. For example, air monitoring station 0215 is located approximately 15 miles northeast of the origin. The locations for the sampling stations along the river are identified by the nearest River Mile (RM) which is the distance along the navigable portion of the Chattahoochee River upstream of the Jim Woodruff Dam near Chattahoochee, Florida. The approximate locations of the plant discharge and intake structures are at RM 43.5 and 43.8, respectively.

The samples are collected by the plant's technical staff, except for fish and river sediment samples which are collected by APCo Environmental Field Services personnel.

All laboratory analyses were performed by Georgia Power Company's Environmental Laboratory (EL) in Smyrna, Georgia.

2-1

TABLE 2-1 (SHEET 1 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-miles)_____ ______

AIRBORNE Particulates Continuous sampler operation with sample Particulate sampler: Analyze for gross collection weekly. beta radioactivity Ž 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months following filter change. Perform gamma isotopic analysis on each sample when gross beta activity is > 10 times the yearly mean of control samples. Perform gamma isotopic analysis on composite

_______________ ___sample (by location) quarterly.

Indicator Stations:

River Intake Structure P1-050 1 (ESE-0.8)

South Perimeter P1-0701 (SSE-l1.0)

Plant Entrance P1-1101 (WSW-0.9)

North Perimeter P1-160 1 (N-0.8)

Control Stations:

Blakely GA (NE-15) PB-0215 Neals Landing, FL PB-07 18 (SSE- 18)

Dothan, AL(W-18) PB-1218 . .... ...

Community Stations:

GA Pacific Paper Co. PC-0703 (SSE-3)

Ashford, AL PC-i1 108 (WSW-8)

Columbia, AL (N-5) PC-1605 ________________ ______________

TABLE 2-1 (SHEET 2 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-m iles)__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Iodine Continuous sampler operation with sample Radioiodine canister: Analyze each

_ __ _ _ _ _ _ _ _ _ _ _ _collection wee~ I1 1 w eekly.- . ....... .. ..

Idicator Statins: - el apefr11 River Intake Structure 11-0501 (ESE-0.8)

South Perimeter 11-070 1 (S SE- 1.0)

Plant Entrance 11-1101 (WSW-0.9)

North Perimeter 11-160 1 (N-0.8)_ _ _ _ _ _ _

Control Station:

Blakely, GA (NE-15) 1LB-0215 Neals Landing, FL LB3-0718 (SSE- 18)

Dothan, AL (W-18) IB3-1218 Communty Station:

GA Pacific Paper Co. IC-0703 (SSE-3)

DIRECT RADIATION TLD Quarterly Gamma dose: Read each badge Plant Perimeter (NNE-0.9) RI-0101 (NE- 1.0) RI-020 1 (ENE-0.9) RI-0301 (E-0.8) RI-0401 (ESE-0.8) R I-0501 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

TABLE 2-1 (SHEET 3 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-miles)

(SE-1.1) RI-0601 (SSE-1.0) RI-0701 (S-1.0) RI-0801 (SSW-1.0) RI-0901 (SW-0.9) RI-1001 (WSW-0.9) RI-1101 (W-0.8) RI-1201 (WNW-0.8) RI-1301 (NW-1.1) RI-1401 (NNW-0.9) RI-1501 (N-0.8) RI-1601 Control Stations:

Blakely, GA (NE-15) RB-0215 Neals Landing, FL RB-0718 (SSE- 18)

Dothan, AL (W-15) RB-1215 Dothan, AL (W-18) RB-1218 Webb, AL RB-1311 (WNW-11)

Haleburg, AL (N-12) RB-1612 Community Station By sector (NNE-4) RC-0104 (NE-4) RC-0204 (ENE-4) RC-0304 (E-5) RC-0405 (ESE-5) RC-0505 (SE-5) RC-0605 (SSE-3) I RC-0703 I h

TABLE 2-1 (SHEET 4 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-miles) X (S-5) RC-0805 (SSW-4) RC-0904 (SW-5) RC-1005 (WSW-4) RC-1 104 (W-4) RC-1204 (WNW-4) RC-1304 (NW-4) RC-1404 (NNW-4) RC-1504 (N-5) RC-1605 Of Special Interest:

Nearest Residence RC-1001 (SW-1.2)

City of Ashford, AL RC- 1108 (WSW-8.0)

WATERBORNE Aliquots taken with proportional semi-Surface Water continuous sampler, having a minimum Gamma isotopic analysis of each 4 week sampling frequency not exceeding two composite sample. Tritium analysis for hours, collected weekly for 4 week each quarterly composite.

composite~s and quarterly composites_...............

Indicator Station:

Paper Mill, (-3 miles WRI downstream of plant discharge, RM 40)

Control Station:

Upstream of WRB Andrews Lock and dam (-3 miles upstream of the plant intake, RM 47)

TABLE 2-1 (SHEET 5 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-miles)

Ground Water Grab sample quarterly Gamma isotopic, 1-131 and tritium an~yses of each sample quarterly Indicator Station:

Paper Mill Well WGI-07 (SSE-4)

Control Station:

Whatley Residence WGB-10 Well (SW-1.2)

River Sediment Grab sample semiannually Gamma isotopic analysis of each sample semiannually Indicator Station:

Downstream of plant RSI discharge at Smith's Bend (RM 41)a Control Station:

Upstream of plant RSB discharge at Andrews Lock & Dam Reservoir (RM 48)a .

INGESTION Milk Control Station:

Robert Weir Dairy MB-0714 Grab sample biweekly

... ..... .. ............. ......... ......... ............. I....... .................

................ ec apebwel Gamma isotopic and l-131 analyses of Donaldsonville, GA (SSE- 14) .

TABLE 2-1 (SHEET 6 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Sample Sampling and Collection Frequency Type and Frequency of Analysis with Sample Types Identification and Locations (sector-miles)_______________________

Fish Grab sample semiannually for Game Fish Gamma isotopic analysis on the edible

____and Bottom Fe gFish

.. porios of each sample semiannually Downstream of plant FGI & FBI discharge in vicinity of Smith's Bend (RM\ 4 1 )b CnrlStation:

Upstream of plant FGB & FBB discharge in Andrews Lock &

Dam Reservoir (RM 4 8 )b Foraize Grab sample from forage every 4 weeks. Gamma isotopic analysis of each sample Iniaor Station:

South Southeast FI-0701 Perimeter (5 SE- 1.0)

North Perimeter FI-1601 (N-0.8)

Control Sain Dothan, AL (W-18) FB-1218

TABLE 2-1 (SHEET 7 of 7)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NOTATIONS

a. These collections are normally made at river mile 41.3 for the indicator station and river mile 47.8 for the control station; however, due to river bottom sediment shifting caused by high flows, dredging, etc., collections may be made from river mile 40 to 42 for the indicator station and from river mile 47 to 49 for the control station.

b. Since a few miles of river water may be needed to obtain adequate fish samples, these river mile positions represent the approximate locations about which the catches are taken. Collections for the indicator station should be from river mile 37.5 to 42.5 and for the control station from river mile 47 to 52.

6 Radiological Environmental Sampling Locations Indicator Control Community REMP Stations Near the TLD A A Plant Perimeter Other A A _

TLD & Other 0 Q Q Figure 2-1 2-9 CloIg(

Radiological Environmental Sampling Locations Indicator Control Community REMP Stations 2 to 5 TLD A A A Miles From the Plant Other m m __

TLD & Other a 0 0 Figure 2-2 2-10

Radiological Environmental Sampling Locations Indicator Control Community REMP Stations Beyond TLD A A A 5 Miles From the Plant Other e e s TLD & Other 0 0 o Figure 2-3 2-11 C-(%

3.0 RESULTS

SUMMARY

In accordance with ODCM 7.1.2.1, the summarized and tabulated results for all of the regular samples collected for the year at the designated indicator, community and control stations are presented in Table 3-1. The format of Table 3-1 is similar to Table 3 of the Nuclear Regulatory Commission (NRC) Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program" Revision 1, November 1979. Results for samples collected at locations other than those listed in Table 2-1 are discussed in Section 4 under the particular sample type.

As indicated in ODCM 7.1.2.1, the results for naturally-occurring radionuclides that are also found in plant effluents must be reported along with man-made radionuclides. Be-7, which occurs abundantly in nature, has been found in some years in the plant effluents. No other naturally occurring radionuclides have been found in effluents. Therefore, the only radionuclides of interest in the REMP are the man-made radionuclides and Be-7, when it is detected in the plant's liquid or gaseous effluents. During 2005, Be-7 was detected in Farley's liquid effluents.

3-1

TABLE 3-1 (SHEET 1 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama Medium or Type and Minimum Indicator Indicator Location with the Community Control Pathway Total Detectable Locations Highest Annual Mean Locations Locations Sampled Number of Concentration Mean (b), Mean (b), Mean(b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction)

Airborne Gross Beta 10 18.4 South 20.7 19.0 19.3 Particulates 517 5.2-44.4 Perimeter 6.1-44.4 6.9-39.5 5.4-50.4 (fCi/m3) 7/207) 1.0 miles, SSE (52/52L , j54/154)

_ (156/156).,

Gamma Isotopic 40 1-131 70 NDM(c) NA(d) NDM NDM (0/16) (0/12) (0/12)

Cs-134 50 NDM NA NDM NDM (0/16) (0/12) (0/12)

Cs-137 60 NDM NA NDM NDM (0/16) (0/12) (0/12)

Airborne 1-131 70 NDM NA NDM NDM Radioiodine 415 (0/207) (0/52) (0/156)

(fCi/m3)

Direct Gamma NA 14.7 RI-0401 21.1 12.5 13.4 Radiation Dose 10.3-21.7 Pht. Perimeter 19.7-21.7 10.0-16.6 10.6-16.7 (mR/91 days) 160 (64/64) 0.8 miles, E (4/4) (72172) (24/24)

Milk (pCi/1) Gamma Isotopic 26 Cs-134 15 NA NA NA NDM (0/26)

Cs-137 18 NA NA NA NDM (0/26)

Ba-140 60 NA NA NA NDM (0/26)

La-140 15 NA NA NA NDM 1-131 1 NA NA NA NDM 26 (0/26)

TABLE 3-1 (SHEET 2 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama Medium or Type and Minimum Indicator Indicator Location with the Community Control Pathway Total Detectable Locations Highest Annual Mean Locations Locations Sampled Number of Concentration Mean (b), Mean (b), Mean(b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction)

Forage Gamma (pCi/kg wet) Isotopic 36 1-131 60 NDM NA NA NDM (0/24) (0/12)

Cs-134 60 NDM NA NA NDM (0/24) (0/12)

Cs-137 80 NDM NA NA 23.1 (0/24) (1/12)

Ground Water H-3 2000 264 Ga Pacific 264 NA 360 (pCi/l) 8 (1/4) Paper Mill (1/4) (1/4)

Well (SSE-4NDM I-13_ 1 NDM NA. . .

8 .. ( ... . . (0/.4).

Gamma Isotopic 8

Mn-54 15 NDM NA NA NDM (0/4) (0/4)

Fe-59 30 NDM NA NA NDM (0/4) (0/4)

Co-58 15 NDM NA NA NDM (0/4) (0/4)

Co-60 15 NDM NA NA NDM (0/4) (0/4)

Zn-65 30 NDM NA NA NDM (0/4) (0/4)

Zr-95 30 NDM NA NA NDM (0/4) (0/4)

Nb-95 15 NDM NA NA NDM (0/4) (0/4)

TABLE 3-1 (SHEET 3 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama Medium or Type and Minimum Indicator Indicator Location with the Community Control Pathway Total Detectable Locations Highest Annual Mean Locations Locations Sampled Number of Concentration Mean (b), Mean (b), Mean(b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction)

Cs-134 15 NDM NA NA NDM (0/4) (0/4)

Cs-137 18 NDM NA NA NDM (0/4) (0/4)

Ba-140 60 NDM NA NA NDM (0/4) (0/4)

La-140 15 NDM NA NA NDM (0/4) (0/4)

Surface Water H-3 3000 215 Ga Pacific 215 NA 173 (pCi/l) 8 177-287 Paper Co. 177-287 (1/4)

RM 4 .....

........( .............. . .-................. ..........................

Gamma Isotopic 26 Be-7 124 (e) NDM NA NA NDM (0/13) (0/13)

Mn-54 15 NDM NA NA NDM (0/13) (0/13)

Fe-59 30 NDM NA NA NDM (0/13) (0/13)

Co-58 15 NDM NA NA NDM (0/13) (0/13)

Co-60 15 NDM NA NA NDM (0/13) (0/13)

Zn-65 30 NDM NA NA NDM (0/13) (0/13)

Zr-95 30 NDM NA NA NDM (0/13) (0/13)

Nb-95 15 NDM NA NA NDM

_ (0/13) (0/13)

TABLE 3-1 (SHEET 4 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama Medium or Type and Minimum Indicator Indicator Location with the Community Control Pathway Total Detectable Locations Highest Annual Mean Locations Locations Sampled Number of Concentration Mean (b), Mean (b), Mean(b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction) 1-131 15 (f) NDM NA NA NDM (0/13) (0/13)

Cs-134 15 NDM NA NA NDM (0/13) (0/13)

Cs-137 18 NDM NA NA NDM (0/13) (0/13)

Ba-140 60 NDM NA NA NDM (0/13) (0/13)

La-140 15 NDM NA NA NDM (0/13) (0/13)

Bottom Gamma Feeding Fish Isotopic (pCi/kg wet) 4 Be-7 655 (e) NDM NA NA NDM (0/2) (0/2)

Mn-54 130 NDM NA NA NDM (0/2) (0/2)

Fe-59 260 NDM NA NA NDM (0/2) (0/2)

Co-58 130 NDM NA NA NDM (0/2) (0/2)

Co-60 130 NDM NA NA NDM (0/2) (0/2)

Zn-65 260 NDM NA NA NDM (0/2) (0/2)

Cs-134 130 NDM NA NA NDM (0/2) (0/2)

Cs-137 150 NDM NA NA 9.6

__1_2_(0/2))

TABLE 3-1 (SHEET 5 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama Medium or Type and Minimum Indicator Indicator Location with the Community Control Pathway Total Detectable Locations Highest Annual Mean Locations Locations Sampled Number of Concentration Mean (b), Mean (b), Mean(b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction)

Game Fish Gamma (pCi/kg wet) Isotopic 4

Be-7 655 (e) NDM NA NA NDM (0/2) (0/2)

Mn-54 130 NDM NA NA NDM (0/2) (0/2)

Fe-59 260 NDM NA NA NDM (0/2) (0/2)

Co-58 130 NDM NA NA NDM (0/2) (0/2)

Co-60 130 NDM NA NA NDM (0/2) (0/2)

Zn-65 260 NDM NA NA NDM (0/2) (0/2)

Cs-134 130 NDM NA NA NDM (0/2) (0/2)

Cs-137 150 15.7 Downstream, 15.7 NA NDM 11.5-19.9 near Smith's 11.5-19.9 (0/2)

(2/2) Bend (RM 41) (2/2)

River Shoreline Gamma Sediment Isotopic (pCi/kg dry) 4 Be-7 655 (e) NDM NA NA NDM (0/2) (0/2)

Cs-134 150 NDM NA NA NDM (0/2) (0/2)

Cs-137 180 14.5 Downstream, 14.5 NA NDM (1/2) near Smith's (1/2) (0/2)

Bend (RM 41)

TABLE 3-1 (SHEET 6 of 6)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Farley Nuclear Plant, Docket Nos. 50-348 and 50-364 Houston County, Alabama NOTATIONS

a. The MDC is defined in ODCM 10.1. Except as noted otherwise, the values listed in this column are the detection capabilities required by ODCM Table 4-3 (Table 4-1 of this report). The values listed in this column are a priori (before the fact) MDCs. In practice, the a posteriori (after the fact) MDCs are generally lower than the values listed. Any a posteriori MDC greater than the value listed in this column is discussed in Section 4.

b. Mean and range are based upon detectable measurements only. The fraction of all measurements at a specified location that are detectable is placed in parentheses.

c. No Detectable Measurement(s).

d. Not Applicable.

e. The EL has determined that this value may be routinely attained under normal conditions. No value is provided in Table 4-1 of this 4i report.

f. If a drinking water pathway exists, a value of I pCi/l would be used. See note b of Table 4-1 of this report.

4.0 DISCUSSION OF RESULTS Included in this section are evaluations of the laboratory results for the various sample types. Comparisons were made between the difference in mean values for pairs of station groups (e.g., indicator and control stations, or, community and control stations) and the calculated Minimum Detectable Difference (MDD) between these pairs, at the 99% Confidence Level (CL). The MDD was determined using the standard Student's t-test. A difference in the mean values which was less than the MDD was considered to be statistically indiscernible.

The 2005 results were compared with past results, including those obtained during preoperation. As appropriate, results were compared with their Minimum Detectable Concentrations (MDC) and Reporting Levels (RL) which are listed in Tables 4-1 and 4-2 of this report, respectively. The required MDCs were achieved during laboratory sample analysis. Any anomalous results are explained within this report.

Results of interest are graphed to show historical trends. The data points are tabulated and included in this report. The points plotted and provided in the tables represent mean values of only detectable results. Periods for which no detectable measurements (NDM) were observed, or periods for which values were not applicable (e.g., milk indicator, etc.), are plotted as O's and listed in the tables as NDM.

Table 4-1 Minimum Detectable Concentrations (MDC)

Analysis Water Airborne Fish Milk Grass or Sediment (pCi/i) Particulate (pCi/kg) (pCi/1) Leafy (pCi/kg) or Gases wet Vegetation dry (fCi/m3) (pCi/kg) wet Gross Beta 4 10 H-3 2000 (a)

Mn-54 15 130 Fe-59 30 260 Co-58 15 130 Co-60 15 130 Zn-65 30 260 Zr-95 30 Nb-95 15 I-131 (b) 70 1 60 Cs-134 15 50 130 15 60 150 Cs-137 18 60 150 18 80 180 Ba-140 60 60 La-140 15 15 (a) If no drinking water pathway exists, a value of 3000 pCi/l may be used.

(b) If no drinking water pathway exists, a value of 15 pCi/I may be used.

4-1

Table 4-2 Reporting Levels (RL)

Analysis Water Airborne Fish Milk (pCi/i) Grass or (pCi/l)Particulate (pCi/kg) wet Leafy or Gases Vegetation (fCi/m3) (pCi/kg) wet H-3 20,000 (a)

Mn-54 1000 30,000 Fe-59 400 10,000 X Co-58 1000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-95 400 Nb-95 700 1-131 2 (b) 900 3 100 Cs-134 30 10,000 1000 60 1000 Cs- 137 50 20,000 2000 70 2000 Ba-140 200 300 La-140 100 400 (a) This is the 40 CFR 141 value for drinking water samples. If no drinking water pathway exists, a value of 30,000 may be used.

(b) If no drinking water pathway exists, a value of 20 pCi/l may be used.

Atmospheric nuclear weapons tests from the mid 1940's through 1980 distributed man-made nuclides around the world. The most recent atmospheric tests in the 1970's and in 1980 had a significant impact upon the radiological concentrations found in the environment prior to and during preoperation, and the earlier years of operation. Some long-lived radionuclides, such as Cs-137, continue to have some impact.

Significant upward trends also followed the Chernobyl incident, which began on April 26, 1986.

In accordance with ODCM 4.1.1.2.1, deviations from the required sampling schedule are permitted if samples are unobtainable due to hazardous conditions, unavailability, inclement weather, equipment malfunction or other just reasons.

Deviations from conducting the REMP as described in Table 2-1 are summarized in Table 4-3 along with their causes and resolutions.

4-2

All results were tested for conformance with Chauvenet's criterion (G. D. Chase and J. L. Rabinowitz, Principles of Radioisotope Methodology, Burgess Publishing Company, 1962, pages 87-90) to identify values which differed from the mean of a set by a statistically significant amount. Identified outliers were investigated to determine the reason(s) for the variation. If equipment malfunction or other valid physical reasons were identified as causing the variation, the anomalous result was excluded from the data set as non-representative. No data were excluded exclusively for failing Chauvenet's criterion. Data exclusions are discussed in this section under the appropriate sample type.

4-3

TABLE 4-3 (SHEET 1 of 3)

DEVIATIONS FROM RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM COLLECTION AFFECTED DEVIATION CAUSE RESOLUTION PERIOD SAMPLE(S) 01/04/05-01/11/05 PI-1601 and Time clock short approximately Reason unknown - If power loss occurred, sampler CR 2005100470 11-1601 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . potential power restarted and was operating interruption. properly at sample c/o. Will monitor time clock operation.

01/11/05-01/18/05 PC-1605 Air sample was not continuously Sample pump found not Sample pump restarted and CR 2005100694 collected throughout sample operating. sampler returned to service.

period. Operated only 45 Will monitor sample pump minutes. operation.

04/05/05-04/12/05 PI-1601 and Lost approximately 1.75 hours8.680556e-4 days 0.0208 hours 1.240079e-4 weeks 2.85375e-5 months Potential power If power loss occurred, sampler CR 2005103865 11-1601 sampling time. interruption due to adverse restarted and was operating weather. properly at sample c/o. Will monitor time clock operation.

04/05/05-04/12/05 PC-1605 Lost approximately 4.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months Potential power If power loss occurred, sampler CR 2005103865 sampling time. interruption due to adverse restarted and was operating weather. properly at sample c/o. Will monitor time clock operation.

05/10/05-05/17/05 PI-0701 and Lost approximately 27.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months Loss of power at plant Sampler resumed operation CR 2005104838 II-0701 sampling time. firing range affected air when power was restored.

sampler operation.

05/17/05-05/24/05 PI-0701 and Lost approximately 25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months Loss of power at plant Sampler resumed operation CR 2005105094 11-0701 sampling time. firing range affected air when power was restored.

sampler operation. Encouraged prior notification of power outages at plant firing range so that alternate power could be considered.

TABLE 4-3 (SHEET 2 of 3)

DEVIATIONS FROM RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM COLLECTION AFFECTED DEVIATION CAUSE RESOLUTION PERIOD SAMPLE(S) 05/17/05-05/24/05 PC-0703 and Lost approximately 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months Reason unknown - If power loss occurred, sampler CR 2005105095 IC-0703 sampling time. potential power restarted and was operating interruption. properly at sample c/o. Will monitor sample pump operation 05/24/05-05/31/05 PC-1 108 Air sample was not continuously Sample system malfunction Sample system repaired.

CR 2005105269 collected throughout sample resulting in loss of sample period. flow.

05/31/05-06/07/05 PB-0718 and Lost approximately 3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months Potential power If power loss occurred, sampler CR 2005105662 IB-0718 sampling time. interruption due to adverse restarted and was operating weather. properly at sample c/o. Will monitor time clock operation.

05/31/05-06/07/05 PI-0701 and Lost approximately 1.75 hours8.680556e-4 days 0.0208 hours 1.240079e-4 weeks 2.85375e-5 months Power interruption at plant Sampler resumed operation CR 2005105662 11-0701 sampling time. firing range affected air when power was restored.

sampler operation.

06/07/05-06/14/05 PI-0701 and Lost approximately 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Power interruption at plant Sampler resumed operation CR 2005105822 II-0701 sampling time. firing range affected air when power was restored.

sampler operation.

07/05/05-07/12/05 PB-0718 and Sample time short approximately Power interruption to air Sampler resumed operation CR 2005106898 EB-0718 25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months . station due to Hurricane when power was restored.

Dennis.

3 RD Quarter TLD TLD rendered suspect by the Moisture / rain water Replaced TLDs at beginning of CR -- none RC-0703B presence of water in the holding entered holding bag. quarter.

bag.

TABLE 4-3 (SHEET 3 of 3)

DEVIATIONS FROM RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM COLLECTION AFFECTED DEVIATION CAUSE RESOLUTION PERIOD SAMPLE(S) 10/04/05-10/11/05 PI-0701 and Lost approximately 3.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months APCO maintenance work Sampler resumed operation CR 2005109985 11-0701 sampling time. on power lines. when power was restored.

09/13/05-10/11/05 WRB 43 river water sample aliquots Power loss of river water Battery was replaced and CR 2005109408 Andrews missed. sampler due to bad battery. sampler returned to service.

Dam 11/01/05-11/08/05 PC-0703 and Lost approximately 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Potential power If power loss occurred, sampler CR 2005111626 IC-0703 sampling time. interruption due to restarted and was operating shutdown activities at the properly at sample c/o.

Cedar Springs Paper Mill.

10/11/05-11/08/05 WRI Sample flow to river water River water intake pumps Requested to be informed prior CR 2005111445 CedarSprings sampler interrupted. at paper mill shutdown to shutdown at paper mill.

Paper Mill from 11/5/05-11/10/05.

11/08/05-11/15/05 PC-0703 and Lost approximately 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Potential power If power loss occurred, sampler CR 2005111626 IC-0703 sampling time. interruption due to restarted and was operating shutdown activities at the properly at sample c/o.

Cedar Springs Paper Mill.

11/08/05-11/15/05 PI-1101 and Insufficient air volume sampled. Air sampling pump Sample pump replaced.

CR 2005111625 11-1101 malfunction.

11/08/05-12/06/05 WRI Sample flow to river water River water intake pumps Requested to be informed prior CR 2005111445 CedarSprings sampler interrupted. at paper mill shutdown to shutdown at paper mill.

Paper Mill from 11/5/05-11/10/05.

4.1 Land Use Census In accordance with ODCM 4.1.2, a land use census was conducted during the month of June 2005. The land use census is used to determine the locations of the nearest permanent residence and milk animal in each of the 16 compass sectors within a distance of 5 miles. A milk animal is a cow or goat producing milk for human consumption. The 2005 survey revealed no significant changes from the 2004 survey. No milk animals were found within a 5 mile distance. The census results are tabulated in Table 4.1-1.

Table 4.1-1 LAND USE CENSUS RESULTS Distance in Miles to the Nearest Location in Each Sector SECTOR l RESIDENCE MILK ANIMAL N 2.6 none NNE 2.5 none NE 2.4 none ENE 2.4 none E 2.8 none ESE 3.0 none SE 3.4 none SSE none none S 4.3 none SSW 2.9 none SW 1.2 none WSW 2.4 none W 1.3 none WNW 2.1 none NW 1.5 none NNW 3.4 none The Houston County, Alabama and the Early County, Georgia Extension Agents were contacted for assistance in locating commercial dairy farms and privately owned milk animals within 5 miles of the plant. A list of commercial dairy farms in Houston County was provided; there are no commercial dairy farms in Early County. Neither agent knew of privately owned milk animals within 5 miles of FNP. In addition, field surveys were conducted in the plant vicinity along the state and county highways and the interconnecting secondary roads. No milk animals were found within 5 miles of the plant.

ODCM 4.1.2.2.1 requires a new controlling receptor to be determined, if the land use census identifies a location that yields a calculated receptor dose greater than the one in current use. Neither current sampling locations nor the controlling receptor were affected by the 2005 land use census results. The current controlling receptor as described in ODCM Table 3-7 remains a child in the SW Sector at 1.2 miles.

4-7

4.2 Airborne As specified in Table 2-1 and shown in Figures 4.2-1 and 4.2-2, airborne particulate filters and charcoal canisters are collected weekly at 4 indicator, 3 control and 3 community stations. Particulate filters are collected at all of the stations while the charcoal canisters are collected at all but 2 of the community stations. At each location, air is continuously drawn through a glass fiber filter to retain airborne particulates and, as appropriate, an activated charcoal canister is placed in series to adsorb radioiodine.

Each particulate filter is counted for gross beta activity. A quarterly gamma isotopic analysis is performed on a composite of the air particulate filters for each station. Each charcoal canister is analyzed for I- 131.

As provided in Table 3-1, the 2005 annual average weekly gross beta activity was 18.4 fCi/m 3 at the indicator stations and 19.3 fCi/m3 at the control stations.

However, the difference of 0.9 fCi/m3 between the two averages is not statistically discernible since the MDD for these two average values is 1.93 fCi/m3 .

As shown in Table 3-1, the 2005 annual average weekly gross beta concentration was 19.0 fCi/m3 at community stations. The community stations average was 0.3 fCi/m3 less than the average for the control stations. The difference is not statistically discernible since it is less than the MDD of 2.02 fCi/m3 between the two averages.

Due to the weapons tests during preoperation and the early years of operation, the average gross beta concentrations were 5 to 10 times greater than those currently being measured. By the mid 1980s, the readings had diminished to about half the current levels. These annual averages approximately doubled as a consequence of the Chernobyl incident in 1986; this impact faded away in approximately 2 years.

The installation of new air monitoring equipment in 1992 yielded an approximate factor of 2 increase in the readings. Since then, the levels have been fairly flat.

The historical trending of the average weekly gross beta air concentrations for each year of operation and the preoperational period at the indicator, control and community stations is plotted in Figure 4.2-1 and listed in Table 4.2-1. In general, there is close agreement between the results for the indicator, control and community stations. This close agreement supports the position that the plant's contribution to gross beta concentration in air is insignificant.

4-8

Figure 4.2-1 Average Week ly Gross Beta Air Concentration 1000-E

( 1001 C

0 4-Cu

-18 7 10 l 0

Po 77 78 79 80 81 82 83 84 85 f 16 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I- MDC I Indicator A Control *-Community 4-9

Table 4.2-1 Average Weekly Gross Beta Air Concentration Period 1 Indicator Control Community (fCi/m3) (fCi/m3) (fCi/m3)

Pre-op 90 92 91 1977 205 206 206 1978 125 115 115 1979 27.3 27.3 28.7 1980 29.7 28.1 29.2 1981 121 115 115 1982 20.0 20.4 21.0 1983 15.5 14.1 14.5 1984 10.2 12.6 10.5 1985 9.0 9.6 10.3 1986 10.5 15.8 12.5 1987 9.0 11.0 17.0 1988 8.0 8.0 10.0 1989 7.0 7.0 8.0 1990 10.0 10.0 10.0 1991 9.0 10.0 8.0 1992 15.0 17.9 18.5 1993 19.1 22.3 22.4 1994 19.0 20.0 19.0 1995 21.7 22.9 21.6 1996 20.3 22.3 23.5 1997 21.1 21.6 22.4 1998 20.6 19.3 22.0 1999 20.5 22.1 25.2 2000 20.9 20.8 23.6 2001 16.3 17.2 17.3 2002 16.8 18.0 16.8 2003 19.1 19.3 19.9 2004 22.0 21.3 22.4 2005_ 18.4 19.3 19.0 4-10

During 2005, no man-made radionuclides were detected from the gamma isotopic analysis of the quarterly composites of the air particulate filters. This has generally been the case since the impact of the weapons tests and the Chernobyl incident have faded. During preoperation and the early years of operation, a number of fission and activation products were detected. Durin3 g preoperation, the average levels for Cs-134 and Cs-137 were 22 and 9 fCi/m , respectively. In 1986, as a consequence of the Chernobyl incident, Cs-134 and Cs-137 levels of 3 to 4 fCi/m3 were found. The MDC and RL for Cs-134 are 50 and 10,000 fCi/m3 and the MDC and RL for Cs- 137 are 60 and 20,000 fCi/m 3 respectively.

The historical trending of the annual detectable Cs-137 concentrations for the indicator, control and community stations is provided in Figure 4.2-2 and Table 4.2-2. The trend has been generally downward since preoperation and no positive results have been observed since 1988.

Figure 4.2-2 Average Annual Cs-137 Concentration in Air 20 i 15 E

C) 0

° 10 0

C 0,z 5

( 5 Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I *-Indicator U-Control -- Community 4-11 Cf-o-

Table 4.2-2 Average Annual Cs-137 Concentration in Air Period Indicator Control Community (fCi/m3) (fCi/m3) (fCi/m3)

Pre-op 8 13 7 1977 3.0 3.0 3.0 1978 4.0 5.0 5.0 1979 2.0 NDM 2.0 1980 1.0 2.0 1.8 1981 2.8 3.2 2.6 1982 1.7 NDM 1.0 1983 1.0 NDM 1.0 1984 NDM 1.5 NDM 1985 1.0 1.0 1.0 1986 3.3 3.4 2.7 1987 NDM NDM NDM 1988 NDM NDM 1 1989 NDM NDM NDM 1990 NDM NDM NDM 1991 NDM NDM NDM 1992 NDM NDM NDM 1993 NDM NDM NDM 1994 NDM NDM NDM 1995 NDM NDM NDM 1996 NDM NDM NDM 1997 NDM NDM NDM 1998 NDM NDM NDM 1999 NDM NDM NDM 2000 NDM NDM NDM 2001 NDM NDM NDM 2002 NDM NDM NDM 2003 NDM NDM NDM 2004 NDM NDM NDM 2005 NDMNDM NDM 4-12

Airborne 1-131 was not detected in the charcoal canisters during 2005. In 1978, levels between 40 and 50 fCi/m 3 were found in a few samples and attributed to the Chinese weapons tests; then after the Chernobyl incident, levels up to a few hundred fCi/m3 were found in some samples. At no other times has airborne I-131 been detected in the environmental samples. The MDC and RL for airborne I-131 are 70 and 900 fCi/m3 respectively.

Table 4-3 lists REMP deviations that occurred during 2005. Although there were 16 air sampling deviations listed in Table 4-3, only 3 required data to be excluded from the calculation of the mean values. Ten of the sixteen were minor deviations where the sample system lost approximately 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months or less of sampling time for the week due to power interruptions.

Three air filter sample results and one air charcoal sample result were excluded for failing Chauvenet's Criterion following equipment malfunctions. PC-1605 was excluded for sample period 1/11/05-1/18/05, PC-1108 was excluded for sample period 5/24/05-5/31/05, and PI-1101 / 11-1101 were excluded for sample period 11/08/05-11/15/05. All of these were due to sample pump malfunctions resulting in an insufficient collection volume.

4-13

4.3 Direct Radiation Direct (external) radiation is measured with thermoluminescent dosimeters (TLDs). Two Panasonic UD-814 TLD badges are placed at each station. Each badge contains three phosphors composed of calcium sulfate crystals (with thulium impurity). The gamma dose at each station is based upon the average readings of the phosphors from the two badges. The two badges for each station are placed in thin plastic bags for protection from moisture while in the field. The badges are nominally exposed for periods of a quarter of a year (91 days). An inspection is performed near mid-quarter to assure that all badges are on-station and to replace any missing or damaged badges.

Two TLD stations are established in each of the 16 sectors, to form 2 concentric rings. The inner ring stations are located near the plant perimeter, as shown in Figure 2-1, and the outer ring stations are located at distances of approximately 3 to 5 miles from the plant, as shown in Figure 2-2. The stations forming the inner ring are designated as the indicator stations. The 6 control stations are located at distances greater than 10 miles from the plant, as shown in Figure 2-3. Stations are also provided which monitor special interest areas: the nearest occupied residence (SW at 1.2 miles), as shown in Figure 2-1, and the city of Ashford (WSW at 8 miles), as shown in Figure 2-3. The 16 outer ring stations and the 2 special interest stations are designated as community stations.

As provided in Table 3-1, the average quarterly exposure measured at the indicator stations (inner ring) during 2005 was 14.7 mR which was 1.3 mR greater than the 13.4 mR which was acquired at the control stations. This difference is less than the MDD of 1.38 mR and is therefore not statistically discernible. The difference of 0.9 mR found between the control stations (13.4 mR) and community stations (12.5 mR) is statistically discernible since the difference is slightly greater than the MDD of 0.82 mR. This difference is consistent with what has been seen in previous years.

The historical trending of the average quarterly exposures in units of mR at the indicator, control and community locations are plotted in Figure 4.3-1 and listed in Table 4.3-1. During preoperation the average exposure at the indicator stations was 1.2 mR greater than that for the control stations, but the average over the entire period of operation was only 1.1 mR greater. During preoperation, the average exposure at the control stations was 1.3 mR greater than that at the community stations and the average over the period of operation is 1.5 mR greater. This supports the position that the plant is not contributing significantly to direct radiation in the environment.

-Table 4-3 lists the REMP program deviations that occurred in 2005. There was one deviation involving a TLD badge in 2005. This deviation did not lead to a loss of direct radiation data since the companion badge, RC-0703A, was in satisfactory condition. During the third quarter, Station RC-0703B had moisture in the holding bag. The result failed Chauvent's Criterion so it was excluded from the statistical analysis and only the valid data from the companion badge, RC-703A was used.

4-14

Figure 4.3-1 Average Quarterly Exposure from Direct Radiation 30 I I I 25 - : : - - -. .. ..

20 E

0 0

0.

Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year Indicator Control A-Community 4-15

Table 4.3-1 Average Quarterly Exposure from Direct Radiation Period Indicator (mR) Control (mR) Community

__________ I I (mR)

Pre-op 12.6 11.4 10.1 1977 10.6 12.2 10.6 1978 15.0 13.5 12.0 1979 20.3 18.7 15.2 1980 21.9 21.6 18.5 1981 16.5 14.9 14.5 1982 15.5 14.7 13.0 1983 20.2 20.2 17.4 1984 18.3 16.9 15.3 1985 21.9 22.0 18.0 1986 17.8 17.7 15.1 1987 20.8 20.0 18.0 1988 21.5 19.9 18.5 1989 18.0 16.2 15.3 1990 18.9 16.4 15.8 1991 18.4 16.1 16.1 1992 16.1 13.6 13.5 1993 17.4 15.9 15.6 1994 15.0 13.0 12.0 1995 14.0 12.5 11.8 1996 14.2 12.7 11.9 1997 15.3 13.9 11.9 1998 16.2 14.6 13.9 1999 14.7 13.4 12.6 2000 15.5 14.1 13.5 2001 14.9 13.4 12.7 2002 14.1 12.6 11.9 2003 15.2 13.6 12.9 2004 14.3 12.9 12.1

,2005 14.7 13.4 12.5 4-16

The standard deviation for the quarterly result for each badge was subjected to a self imposed limit of 1.4. This limit is calculated using a method developed by the American Society for Testing and Materials (ASTM) (ASTM Special Technical Publication 15D, ASTM Manual on Presentation of Data and Control Chart Analysis. Fourth Revision, Philadelphia, PA, October 1976). The calculation is based upon the standard deviations obtained by the EL with the Panasonic UD-814 badges during 1992. This limit serves as a flag to initiate an investigation. To be conservative, readings with a standard deviation greater than 1.4 are excluded since the high standard deviation is interpreted as an indication of unacceptable variation in TLD response.

The TLD results from the following stations were excluded from the data set because their standard deviations were greater than 1.4:

Quarter 1 -RB-0718A Quarter 2 - RB-1215A, RC-0703A, RI-1501B Quarter 3 - RC- I108A and RC-1404B Quarter 4 - RI-lOOIB For the seven TLD stations where these badges were located, only the reading of the companion badge was used to determine the quarterly exposure for the station.

The affected badges were visually inspected under a microscope and the glow curve and test results for the anneal data and the element correction factors were reviewed. No reason was found for the high standard deviations.

4-17

4.4 Milk In accordance with Table 2-1, milk samples are collected biweekly from a control location. No indicator station (a location within five miles of the plant) has been available for milk sampling since 1987. As discussed in Section 4.0, no milk animals were found within five miles of the plant during the 2005 land use census.

Gamma isotopic analyses were performed on each sample as specified in Table 2-1. No man-made radionuclides were identified from the gamma isotopic analysis of the milk samples during 2005. The MDC and RL for Cs-137 in milk are 18 and 70 pCi/l, respectively. The historical trending of the average annual detectable Cs-137 concentration in milk samples is shown in Figure 4.4-1 and Table 4.4-1. Cs-137 has not been detected in milk since 1986. Its presence at that time is attributed to the Chernobyl incident. The earlier detectable results were attributed to the weapons tests.

Figure 4.4-1 Average Annual Cs-i 37 Concentration in Milk 45 40

_________FX 35 0 30 0.

ii l II' 25

_______I r_

0 Cu I- 20 0

0 15 10 5

0 Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

-

Indicator -- Control - MDC 4-18

Table 4.4-1 Average Annual Cs-137 Concentration in Milk Period Indicator Control T (pCi/I) (pCi/i)

Pre-op 32 18 1977 41 20 1978 15 17 1979 NDM NDM 1980 NDM NDM 1981 NDM 23.0 1982 NDM NDM 1983 NDM NDM 1984 NDM NDM 1985 NDM NDM 1986 NDM 16.5 1987 NDM NDM 1988 NDM NDM 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM 4-19

As specified in Table 2-1, each sample was analyzed for I- 131, which has not been detected in milk since 1986. The presence of 1-131 at that time is attributed to the Chernobyl incident. The earlier detectable results were attributed to the weapons tests. The MDC and RL for 1-131 are 1 and 3 pCi/l, respectively. Figure 4.4-2 and Table 4.4-2 show the historical trending of the average annual detectable 1-131 concentration in milk samples.

Figure 4.4-2 Average Annual 1-131 Concentration in Milk 50 - ---

40 - --

r 0 0.

s 0 10 10 I E E.- E - - - E - - - - - - - -

Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year Indicator - -Control -MDC _RLl 4-20

Table 4.4-2 Average Annual 1-131 Concentration in Milk Period Indicator j Control

_____ (pCi/l) (pCi/l)

Pre-op 41 14 1977 20 2.6 1978 30 11 1979 NDM NDM 1980 NDM NDM 1981 NDM NDM 1982 NDM NDM 1983 NDM NDM 1984 NDM _ NDM 1985 NDM NDM 1986 NDM 5.0 1987 NDM NDM 1988 NDM NDM 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM 4-21

4.5 Forage In accordance with Table 2-1, forage samples are collected every 4 weeks at two indicator stations on the plant perimeter, and at one control station located approximately 18 miles west of the plant, in Dothan. Gamma isotopic analyses are performed on each sample.

During preoperation and the years of operation through 1986 (the year of the Chernobyl incident), Cs-137 was typically found in about a third of the 35 to 40 forage samples collected per year. In 1987 and 1988 the number dropped to about a seventh of the total samples and from 1989 through 1994, it was only found in one or two samples every year. From 1994 to 2004, Cs-137 was detected in only a few samples, three indicator samples and three control samples.

In 2005, Cs-137 was detected in one of the 12 control samples and not detected in any of the 24 indicator samples. Since there was only one positive result in all of the samples, no statistical analysis can be performed. The occasional presence of Cs-137 in vegetation samples is attributed primarily to fallout from nuclear weapons tests and from the Chernobyl incident. The level seen in 2005 in the one positive control sample (23.1 pCi/kg wet) is less than 2% of the reporting level.

The MDC and RL for Cs-137 in forage are 80 and 2000 pCi/kg wet, respectively.

Table 4.5-1 presents the average detectable results of Cs-137 found in forage over the life of the plant and Figure 4.5-1 shows the historical trending of this data.

4-22

Figure 4.5-1 Average Annual Cs-137 Concentration in Forage 90 80 -

~70 -

60

.X 0 -atre t t so 0.

30 10 Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l Indicator -U-Control -MDC 4-23

Table 4.5-1 Average Annual Cs-137 Concentration in Forage Period T_ Indicator (pCi/kg) wet Control (pCi/kg) wet 1re-op 59.4 48.6 1977 25.0 NDM 1978 52.5 32.5 1979 37.2 32.8 1980 36.2 35.9 1981 32.1 43.1 1982 25.0 33.1 1983 16.8 23.6 1984 19.N 22.8 1985 22.2 9.5 1986 41.2 36.2 1987 46.8 NDM 1988 33.6 31.7 1989 35.7 NDM 1990 56.0 NDM 1991 NDM _ 12.9___

1992 NDM 43.0 1993 NDM 24.0 1994 NDM 24 1995 NDM NDM 1996 NDM NDM 1997 52.6 NDM 1998 NDM 22.7 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 24.1 25.2 2004 21.6 NDM 2005 NDM 23.1 4-24

During preoperation and in the early years of operation, I-131 was found in 10%

to 25% of the forage samples at very high levels which ranged from around 100 to 1,000 pCi/kg wet. In 1986 (Chernobyl incident), 1-131 reappeared after not having been detected for 3 years. The MDC and RL for 1-131 are 60 and 100 pCi/kg wet, respectively. Table 4.5-2 lists the average detectable results of 1-131 found in forage over the life of the plant and Figure 4.5-2 plots the historical trending of this data.

I-131 has not been detected in forage samples since the 1986 Chernobyl accident.

Figure 4.5-2 Average Annual 1-131 Concentration in Forage 1000 900 U) 800 4-700 600 500 L)

CL 400 0

c 300 C.

200 100 0

Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I---Indicator -U-Control - MDC RL I 4-25

Table 4.5-2 Average Annual 1-131 Concentration in Forage Period Indicator Control 1d(pCi/kg) wet (pCi/kg) wet Pre-op 405 486 1977 971 654 1978 220 240 1979 NDM NDM 1980 NDM NDM 1981 21.4 NDM 1982 46.4 NDM 1983 NDM NDM 1984 NDM NDM 1985 NDM NDM 1986 184 NDM 1987 NDM NDM 1988 NDM NDM 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM These forage analyses results show the impact of the weapons tests during preoperation and the early years of operation and of the Chernobyl incident in 1986 and for a few years afterwards. The impact is reflected by the number of different radionuclides detected, the fraction of samples with detectable results, as well as the magnitude of the results. During preoperation and for the first few years of operation, 11 different radionuclides from fission and activation products were detected. By 1985, only 2 different radionuclides were detected and the fraction of samples with detectable results had diminished. In 1986, the same two nuclides as seen in 1985 appeared at a significantly higher magnitude and 1-131 reappeared. In the years following 1986, only Cs-137 has been found in forage and it has been found in a decreasing fraction of the samples.

4-26

4.6 Ground Water In the FNP environs, there are no true indicator sources of ground water. A well, located about four miles south-southeast of the plant on the east bank of the Chattahoochee River, serves Georgia Pacific Paper Company as a source of potable water and is designated as the indicator station. A deep well located about 1.2 miles southwest of the plant, which supplies water to the Whatley residence, is designated as the control station. Samples are collected quarterly and analyzed for gamma isotopic, 1-131 and tritium as specified in Table 2-1. In 2005, one of 4 indicator samples was positive for tritium and one of 4 control samples was positive for tritium. No other radionuclides were detected.

In 1983, 1985, and 1986, Cs-134 was detected in single samples at levels ranging from 3 to 13 pCi/l. The MDC and RL for Cs-134 in water are 15 and 30 pCiAI, respectively.

During preoperation, Cs-137 was detected in two of the samples at levels of 15 and 17 pCifl. Then in 1984 and 1985, Cs-137 was again detected in a few samples with levels ranging from 4 to 5 pCi/l. The MDC and RL for Cs-137 in water are 18 and 50 pCi/l, respectively.

1-131 has never been detected in ground water samples. From 1986-2003, no radionuclides were detected. In 2005, tritium was detected at very low concentrations (near the instrument detection level). One of four indicator samples was positive (264 pCi/L), and one of four control samples was positive (360 pCiAL). These levels are very close to environmental background concentrations which are approximately 100-300 pCill. The positive results are less than 2% of the reporting level for tritium. The MDC and RL for tritium in drinking water are 2,000 and 20,000 pCi/I, respectively.

Figure 4.6-1 and Table 4.6-1 show the historical trending of the average annual detectable tritium concentration in ground water.

4-27

in Ground Water Average Annual H-3 Concentration Figure 4.6-1 Average Annual H-3 Concentration in Ground Water 2500 2000 Z.,

0. 1500 0

kI IkW.~

I-0 1000

_ ____ __ __- __ __ ___ I II 500 P 7 78I ~ ~~ _111

~~~~11 _11 _ I 98 99 00 01 02 0 04 05 I

0 0

Po 77 78 79 80 81 82 83 84 8Y 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I - Indicator -U -Control MDC 4-28 cI?-

Table 4.6-1 Average Annual H-3 Concentration in Ground Water Period Indicator j Control Ped I (pCi) I (pCi/l)

Pre-op 150 240 1977 NDM NDM 1978 NDM 240 1979 NDM NDM 1980 124 NDM 1981 264 NDM 1982 240 NDM 1983 360 341 1984 NDM NDM 1985 NDM NDM 1986 NDM NDM 1987 NDM NDM 1988 NDM NDM 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 _194 271 210QS5 264T 360-4-29

4.7 Surface Water As specified in Table 2-1 and shown in Figure 2-2, water samples are collected from the Chattahoochee River at a control station approximately 3 miles upstream of the intake structure and at an indicator station approximately 4 miles downstream of the discharge structure. Small quantities are collected during the week at periodic intervals using automatic samplers. For each station, one liter from each of four consecutive weekly samples is combined into a composite sample which is analyzed for gamma emitters. In addition, 0.075 liters is collected from 13 consecutive weekly samples for each station to form composite quarterly samples which are analyzed for tritium.

No detectable results have been found from these gamma isotopic analyses since 1988. During preoperation and in every year of operation through 1988 (except 1979 and 1980), a few samples showed at least one of nine different activation or fission products at levels less than or on the order of their MDCs. During preoperation, Cs-137 was found in about 3% of the samples. From 1981 through 1988, it was found in about 15% of the samples. Cs-134 was found in about 15%

of the samples from 1981 to 1986. All of these gamma emitters are attributed to the weapons tests and the Chernobyl incident.

As shown in Table 3-1, tritium was detected in 3 out of 4 composite samples collected at the indicator station and in 1 out of 4 composite samples collected at the control station. The average concentration at the indicator station was 215 pCi/l. At the control station, the single positive result was 173 pCi/l. An MDD could not be calculated because there was only one positive value at the control station. Using the modified Student's t-test, the difference between the average at the indicator station and the single detectable sample at the control station was not statistically discernible. The positive results seen at both stations are very close to the instrument detection threshold. The background levels commonly seen in the environment are 100-300 pCi/l.

Historical trending of the detectable concentrations of tritium in surface water is provided in Figure 4.7-1 and Table 4.7-1. The slightly elevated plot of the indicator stations could be indicative of plant tritium contributions to surface water. However, it is noteworthy that the annual average levels are less than 10%

of the MDC and less than 1% of the RL. The MDC and RL for tritium in surface water are 3000 and 30,000, respectively.

As shown in Table 4-3, there were three deviations involving surface water sampling in 2005. Two of these were due to an outage at the Cedar Springs Paper Mill in which the river water pumps were shutdown. The other was due to a battery failure at the Andrews Dam sampler. None of the deviations resulted in excluded data.

4-30

Figure 4.7-1 Average Annual H-3 Concentration in Surface Water 3500 3000 --

2500 ---

.2 0 10 C.,*

0 500 ___ -

Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

- -- Indicator U-Control - MDC 4-31 C -,-

Table 4.7-1 Average Annual H-3 Concentration in Surface Water Period j Indicator Control

_(p-C/) _pCi/I)

Pre-op 200 170 1977 300 160 1978 230 250 1979 169 135 1980 221 206 1981 294 162 1982 300 132 1983 434 III 1984 333 152 1985 351 105 1986 478 272 1987 291.8 116.5 1988 293.3 NDM 1989 253.8 NDM 1990 166 NDM 1991 122 NDM 1992 360.5 134 1993 388.8 NDM 1994 NDM NDM 1995 257 NDM 1996 386 NDM 1997 NDM NDM 1998 415 NDM 1999 314 NDM 2000 424 212 2001 252 NDM 2002 598 NDM 2003 296 NDM 2004 270 NDM 2005 215 173 4-32

4.8 Fish Two types of fish (bottom feeding and game) are collected semiannually from the Chattahoochee River at a control station several miles upstream of the plant intake structure and at an indicator station a few miles downstream of the plant discharge structure. These locations are shown in Figure 2-2. Gamma isotopic analysis is performed on the edible portions of each sample as specified in Table 2-1.

As provided in Table 3-1, Cs-137 was the only radionuclide of interest that was found from the gamma isotopic analysis of fish samples in 2005. Cs-137 was detected in both the fall and spring collection of game fish samples at the indicator station. The average was 15.7 pCi/kg wet. No Cs-137 was detected in the game fish samples at the control station. The low levels seen at the indicator station were less than 1% of the reporting level. The MDC for Cs-137 in fish is 150 pCi/kg wet and the RL is 2000 pCi/kg wet.

In the spring, Cs-137 was detected in the bottom feeding fish sample at the control location (9.6 pCi/kg wet). Cs-137 was not detected in any of the other bottom feeding fish samples. The single positive value at the control station was near the detection threshold for the instrument and is less than 1% of the reporting level.

The MDC for Cs-137 in fish is 150 pCi/kg wet and the RL is 2000 pCi/kg wet.

Historically, Cs-137 has been found in approximately 30% of the bottom feeding fish samples and in 80% of the game fish samples. Figures 4.8-1 and 4.8-2 and Tables 4.8-1 and 4.8-2 provide the historical trending of the average annual detectable concentrations of Cs-137 in pCi/kg wet in bottom feeding and game fish, respectively. Since the early 1980s, values have generally decreased for both indicator and control groups, with the exception of the bottom feeding fish collected at the indicator station in 1993. While some contribution from the plant cannot be ruled out, most of the Cs-137 in these samples may be attributed to the nuclear weapons tests and the Chernobyl incident, as evidenced by the normally close agreement between the control and indicator station results.

4-33

Figure 4.8-1 Average Annual Cs-137 Concentration in Bottom Feeding Fish 250 4- 200 __ __ ______ _

O 150 0.

I

\iii IIIIIIII U 150 0

4-p 4-.

100 - - - ----- -- - . .

U) c 0

0

o. 50 7 I 1

0

- I - U-I - - I - I 2 K1 W*__

//i P\

I __ 1 __ L _

II -I W. . .

L 1_

I*

Do77_ 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I *Indicator Control - MDC 4-34 Cat

Table 4.8-1 Average Annual Cs-137 Concentration in Bottom Feeding Fish Period Indicator Control

_(pCi/kg) wet (pCi/kg) wet

_ _ _ L69

__Pre-op __ 48 1977 l NDM l NDM 1978 NDM NDM 1979 38 30 1980 92 90 1981 96 106 1982 51.5 39.0 1983 NDM NDM 1984 NDM 19 1985 NDM NDM 1986 28 25 1987 25 19 1988 25.5 22.0 1989 NDM NDM 1990 NDM NDM 1991 NDM NDM 1992 NDM NDM 1993 208 NDM 1994 15.9 10.3 1995 NDM 14.2 1996 16.4 9.9 1997 10.9 7.7 1998 NDM NDM 1999 19.2 NDM 2000 NDM NDM 2001 9.8 NDM 2002 NDM NDM 2003 NDM 8.5 2004 8.1 NDM 2005 NDM 9.6 4-35

Figure 4.8-2 Average Annual Cs-137 Concentration in Game Fish 3~50 CD 0

I-C U1 0

50 Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l Indicator -99P-Control MDC 4-36 DI

Table 4.8-2 Average Annual Cs-137 Concentration in Game Fish Period l Indicator Control l (pCi/kg) wet j (pCi/kg) wet Pre-op 84 60 1977 95 48 1978 NDM NDM 1979 111 83.5 1980 289 316 1981 189 126 1982 76 77 1983 57 56.5 1984 42 26 1985 84 44 1986 51 35 1987 83 46 1988 42 33 1989 38 29 1990 28 NDM 1991 36 24 1992 32.5 28 1993 34 NDM 1994 19 16 1995 17.9 18.2 1996 19.6 23.1 1997 25.9 NDM 1998 52 20 1999 36.9 15.9 2000 22.9 12.5 2001 22.4 12.3 2002 NDM 10.1 2003 19.3 12.0 2004 12.7 10.8 2005 15.7 NDM Radionuclides of interest other than Cs-137 have been found in only a few samples in the past. The following table provides a summary of the results in pCilkg wet compared with the applicable MDCs.

YEAR Nuclide Fish Type Indicator Control MDC (pCi/kg)_ (pC g)

(pCi/kg) 1978 Ce-144 Bottom Feeding NDM 200 _

1981 Nb-95 Bottom Feeding 38 NDM 50 (a) 1982 Nb-95 Game 31 NDM 50 (a) 1986 Co-60 Game 25 NDM 130 4-37

(a) Determined by the EL. Not defined in ODCM Table 4-3 (Table 4-1 of this report) 4.9 Sediment River sediment samples are collected semiannually on the Chattahoochee River at a control station which is approximately 4 miles upstream of the intake structure and at an indicator station which is approximately 2 miles downstream of the discharge structure as shown in Figure 2-2. A gamma isotopic analysis is performed on each sample as specified in Table 2-1. During 2005, the only nuclide of interest detected was Cs-137. It was detected in one of the sediment indicator samples (14.5 pCi/kg dry). Although it had been several years since a positive Cs-137 result has been seen, this level was near the instrument detection threshold and was well below the MDC of 180 pCi/I dry.

Historically, Be-7, Cs-134, Cs-137, and Nb-95 have been detected in some samples. These positive results were generally for samples collected at the control station. A summary of the positive historical results for these nuclides along with their applicable MDCs in units of pCi/kg dry is provided in Table 4.9. Cs-134 and Cs-137 data are plotted in Figures 4.9-1 and 4.9-2, respectively.

Table 4.9 Sediment Nuclide Concentrations Nuclide YEAR Indicator (pCi/kg) Control (pCi/kg) MDC (pCi/kg)

Be-7 1985 535 945 655 (a) 2003 199 NDM Cs-134 1987 NDM 45 150 1989 NDM 48 1992 138 51 1993 94 105 Cs- 137 1981 NDM 185 180 1985 NDM 97 1989 NDM 39 1994 29 11 1996 11.8 NDM 2005 14.5 NDM l Nb-95 1981 52 113 50 (a)

(a) Determined by the EL. Not defined in ODCM Table 4-3 (Table 4-1 of this report).

4-38

Figure 4.9-1 Average Annual Cs-134 Concentration in Sediment 160 140 m 120 C.,

o. 100 I- I I I I- I I 0

. 80 HiV000000;0I O.1 C 60 60 C

0 0 40 20 0

Po 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

-+-Indicator -dU-Control - MDC The positive results for Cs-134 appear mostly at the control station. Due to its relatively short half-life of approximately 2 years, the positive results may be attributed to the Chernobyl incident. The overall plotting of the positive results does not show any discernible trends.

4-39

Figure 4.9-2 Cs-137 appears to be trending down since the ceasing of above ground weapons testing and the majority of the positive results appear at the control stations.

Therefore in general, the positive results can be attributed to the weapons tests and the Chernobyl incident.

4-40

5.0 INTERLABORATORY COMPARISON PROGRAM In accordance with ODCM 4.1.3, the EL participates in an ICP that satisfies the requirements of Regulatory Guide 4.15, Revision 1, "Quality Assurance for Radiological Monitoring Programs (Normal Operations) - Effluent Streams and the Environment", February 1979. The guide indicates the ICP is to be conducted with the Environmental Protection Agency (EPA) Environmental Radioactivity Laboratory Intercomparison Studies (Cross-check) Program or an equivalent program, and the ICP should include all of the determinations (sample medium/radionuclide combinations) that are offered by the EPA and included in the REMP.

The ICP is conducted by Analytics, Inc. of Atlanta, Georgia. Analytics has a documented Quality Assurance (QA) program and the capability to prepare Quality Control (QC) materials traceable to the National Institute of Standards and Technology. The ICP is a third party blind testing program which provides a means to ensure independent checks are performed on the accuracy and precision of the measurements of radioactive materials in environmental sample matrices.

Analytics supplies the crosscheck samples to the EL which performs the laboratory analyses in a normal manner. Each of the specified analyses is performed three times. The results are then sent to Analytics who performs an evaluation which may be helpful to the EL in the identification of instrument or procedural problems.

The samples offered by Analytics and included in the EL analyses are gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples.

The accuracy of each result is measured by the normalized deviation, which is the ratio of the reported average less the known value to the total error. The total error is the square root of the sum of the squares of the uncertainties of the known value and of the reported average. The uncertainty of the known value includes all analytical uncertainties as reported by Analytics. The uncertainty of the reported average is the propagated error of the values in the reported average by the EL.

The precision of each result is measured by the coefficient of variation, which is defined as the standard deviation of the reported result divided by the reported average. An investigation is undertaken whenever the absolute value of the normalized deviation is greater than three or whenever the coefficient of variation is greater than 15% for all radionuclides other than Cr-51 and Fe-59. For Cr-51 and Fe-59, an investigation is undertaken when the coefficient of variation exceeds the values shown as follows:

Nuclide Concentration

Total Sample Activity Percent Coefficient (pCi) of Variation Cr-51 <300 NA 25 Cr-51 NA >1000 25 Cr-51 >300 <1000 15 Fe-59 <80 NA 25 Fe-59 >80 NA 15

For air filters, concentration units are pCi/filter. For all other media, concentration units are pCi/liter (pCi/1).

5-1

As required by ODCM 4.1.3.3 and 7.1.2.3, a summary of the results of the EL's participation in the ICP is provided in Table 5-1 for: the gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples. Delineated in this table for each of the media/analysis combinations, are: the specific radionuclides; Analytics' preparation dates; the known values with their uncertainties supplied by Analytics; the reported averages with their standard deviations; and the resultant normalized deviations and coefficients of variation expressed as a percentage.

In 2005, the laboratory analyzed 9 samples for 46 parameters and completed a gamma analysis investigation of Fe-59 in water. The 2005 analyses included tritium, gross beta, Fe-55, Sr-89/90 and gamma emitting radio-nuclides in different matrices. Two analyses were outside the control limit for precision. The precision deviations were for the determination of gross alpha in water and Sr-90 in an air filter.

The gross alpha in water was analyzed in triplicate with an average value reported.

The high range may be attributed to one of the samples not dispersing evenly in the planchet causing alpha absorption. The second quarter alpha sample was in control so no further investigation will be performed. The second quarter air filter sample analyzed for Sr-90 had a high precision value. The low activity in the sample produced small detector counts, thus causing the elevated error. No further investigation will be performed.

The 2004 Fe-59 analysis in water investigation was completed. The efficiencies used in determining the activity were obtained from a calibration curve. The curve was determined to be lower at higher energies due to summing effects from the calibration nuclides. A curve will be produced using a standard containing nuclides without summing gamma energies. The difference in efficiencies of the curves will be applied to the analysis to compensate for the summing losses. This is a known bias for gamma spectroscopy measurements and does not significantly effect radiological environmental monitoring measurements.

5-2

TABLE 5-1 (SHEET 1 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GROSS BETA ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysis or Date Reported Known [Standard Uncertainty Percent Coef Normalized Radionuclide IPrepared IAverage Value Deviation EL Analytics (3S) of Variation Deviation Gross Beta [09/15/05 ] 75.00 j 71.80 l 2.90 0.80 J 5.60 0.77 GAMMA ISOTOPIC ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysisor l Date r Reported Known Standard Uncertainty Percent Coef Normalized Radionuclide l Prepared Average Value j Deviation EL l Analytics (3S) j of Variation j Deviation Ce-141 09/15/05 161.80 163.00 5.42 1.82 4.69 -0.16 Co-58 09115/05 46.30 44.50 4.79 0.49 12.39 0.31 Co-60 09/15/05 113.20 117.00 1.06 1.30 3.80 -0.88 Cr-51 09/15/05 260.80 237.00 6.53 2.63 8.14 1.12 Cs-134 09/15/05 80.00 85.70 3.86 0.95 6.27 -1.14 Cs-137 09/15/05 145.60 137.00 8.07 1.52 6.67 0.89 Fe-59 09/15/05 53.40 42.70 3.91 0.49 11.03 1.82 Mn-54 09/15/05 70.40 64.50 1.22 0.72 5.11 1.65 Zn-65 09/15/05 105.10 86.50 5.51 0.96 7.88 2.24 GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or Date lReported Known Standard Uncertainty [Percent Coef [Normalized Radionuclide , Prepared Average Value j Deviation EL Analytics (3S) [of Variation Deviation Ce-141 06/09/05 97.60 92.40 12.37 1.03 7.95 0.67 Co-58 06/09/05 NA NA NA NA NA NA Co-60 06/09/05 144.20 145.00 5.62 1.61 5.94 -0.09 Cr-51 06/09/05 286.60 303.00 28.38 3.37 15.87 -0.36 Cs-134 06/09/05 93.10 95.00 6.43 1.06 8.75 -0.24 Cs-137 06/09/05 194.30 189.00 6.24 2.10 5.60 0.49

TABLE 5-1 (SHEET 2 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or Date fReported Known Standard I Uncertainty Percent Coef Normalized Radionuclide Prepared Average Value I Deviation EL I Analytics (3S) of Variation Deviation Fe-59 06/09/05 70.30 63.90 8.92 0.71 17.92 0.51 1-131 06/09/05 93.00 86.90 6.93 0.97 10.63 0.61 Mn-54 06/09/05 127.70 125.00 3.73 1.39 6.61 0.31 Zn-65 06/09/05 163.50 155.00 12.09 1.72 10.90 0.48 GROSS BETA ANALYSIS OF WATER SAMPLE (pCi/liter)

Analysis or Date Reported Known Standard Uncertainty Percent Coef Normalized Radionuclide Prepared Average Value Deviation EL Analytics (3S) of Variation Deviation Gross Beta 03/17/05 276.00 268.00 4.66 2.98 6.00 0.45 06/09/05 214.20 214.00 17.96 2.37 8.39 0.01 GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or 1 Date Reported Known I Standard Uncertainty Percent Coef Normalized Radionuclide l Prepared aAverage lue I Deviation EL l Analytics (3S) l of Variation l Deviation Ce-141 03/17/05 222.00 221.00 9.6 2.46 5.13 0.09 Co-58 03/17/05 115.40 111.00 7.4 1.24 9.21 0.41 Co-60 03/17/05 142.80 139.00 6.4 1.54 7.91 0.34 Cr-51 03/17/05 370.30 322.00 46.1 3.57 14.70 0.89 Cs-134 03/17/05 138.60 134.00 6.1 1.49 5.46 0.61

TABLE 5-1 (SHEET 3 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or Date I Reported Known l Standard I Uncertainty fPercent Coef j Normalized Radionuclide Prepared Average Value l Deviation EL IAnalytics (3S) l of Variation I Deviation Cs-137 03/17/05 131.40 125.00 7.3 1.39 6.53 0.75 Fe-59 03/17/05 125.60 107.00 9.5 1.19 12.06 1.23 1-131 03/17/05 76.10 65.90 7.1 0.73 11.84 1.13 Mn-54 03/17/05 157.00 154.00 8 1.71 5.63 0.34 Zn-65 03/17/05 219.60 191.00 14.9 2.12 10.82 1.20 TRITIUM ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysisor 1Date 1Reported 1Known l Standard Uncertaint 1Percent Coef 1Normalized Radionuclide Prepared Average IValue j Deviation EL Analytics (3S) j of Variation j Deviation H-3 03/17/05 5388.00 6040.00 132.04 133.33 4.10 -2.96 06/09/05 9879.10 9100.00 133.48 200.00 2.60 2.62

6.0 CONCLUSION

S This report confirms the licensee's conformance with the requirements of Chapter 4 of the ODCM during 2005. It provides a summary and discussion of the results of the laboratory analyses for each type of sample.

All of the radiological levels were low and are generally trending downward.

In 2005, there were two sample types (game fish and river sediment) which showed low levels of Cs-137 in the indicator station samples but no positive results for Cs-137 in the control station samples. These results could potentially be attributed to plant effluents and are discussed below.

Cesium-137 was detected in the game fish samples at the indicator station in the spring and fall collections with no Cs-137 detected at the control station. The average value at the indicator station was 15.7 pCi/kg wet. If an adult consumed game fish regularly from the river, the dose this person could potentially receive would be 2.35E-2 mrem in a year due to Cs-137. This dose is approximately 0.8%

of the annual dose limit of 3 mrem to the total body due to liquid effluents.

Cesium-137 was detected at the indicator station in one of the two sediment collections. The positive result was 14.5 pCi/kg dry. There were no positive Cs-137 results at the control station. The potential dose to a member of the public expected to receive the highest dose would be 1.63E-4 mrem in a year which is 0.01% of the annual dose limit.

No discernible radiological impact upon the environment or the public as a consequence of plant discharges to the atmosphere and to the river was established for any other REMP samples.

6-1

ENCLOSURE 3 Vogtle Electric Generating Plant Annual Radiological Environmental Operating Report for 2005

VOGTLE ELECTRIC GENERATING PLANT ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2005 SOUTHERN AZ COMPANY Energy to Serve Your World"

TABLE OF CONTENTS Section and/or Title Subsection Page List of Figures ii List of Tables iii List of Acronyms iv 1.0 Introduction 1-1 2.0 REMP Description 2-1 3.0 Results Summary 3-1 4.0 Discussion of Results 4-1 4.1 Land Use Census and River Survey 4-5 4.2 Airborne 4-7 4.3 Direct Radiation 4-10 4.4 Milk 4-15 4.5 Vegetation 4-17 4.6 River Water 4-19 4.7 Drinking Water 4-22 4.8 Fish 4-28 4.9 Sediment 4-31 5.0 Interlaboratory Comparison Program (ICP) 5-1 6.0 Conclusions 6-1 i

LIST OF FIGURES Figure Number Title Page Figure 2-1 REMP Stations in the Plant Vicinity 2-10 Figure 2-2 REMP Control Stations for the Plant 2-11 Figure 2-3 REMP Indicator Drinking Water Stations 2-12 Figure 4.2-1 Average Weekly Gross Beta Air Concentration 4-8 Figure 4.3-1 Average Quarterly Exposure from Direct Radiation 4-11 Figure 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 4-12 Figure 4.4-1 Average Annual Cs-137 Concentration in Milk 4-15 Figure 4.5-1 Average Annual Cs-137 Concentration in Vegetation 4-18 Figure 4.6-1 Average Annual H-3 Concentration in River Water 4-20 Figure 4.7-1 Average Monthly Gross Beta Concentration in Raw Drinking Water 4-23 Figure 4.7-2 Average Monthly Gross Beta Concentration in Finished Drinking Water 4-24 Figure 4.7-3 Average Annual H-3 Concentration in Raw Drinking Water 4-26 Figure 4.7-4 Average Annual H-3 Concentration in Finished Drinking Water 4-27 Figure 4.8-1 Average Annual Cs-137 Concentration in Fish 4-29 Figure 4.9-1 Average Annual Be-7 Concentration in Sediment 4-32 Figure 4.9-2 Average Annual Co-58 Concentration in Sediment 4-33 Figure 4.9-3 Average Annual Co-60 Concentration in Sediment 4-34 Figure 4.9-4 Average Annual Cs-137 Concentration in Sediment 4-35 ii

LIST OF TABLES Table Number Title Page Table 2-1 Summary Description of Radiological Environmental Monitoring Program 2-2 Table 2-2 Radiological Environmental Sampling Locations 2-7 Table 3-1 Radiological Environmental Monitoring Program Annual Summary 3-2 Table 4-1 Minimum Detectable Concentrations (MDC) 4-1 Table 4-2 Reporting Levels (RL) 4-2 Table 4-3 Deviations from Radiological Environmental Monitoring Program 4-4 Table 4.1- 1 Land Use Census Results 4-5 Table 4.2-1 Average Weekly Gross Beta Air Concentration 4-8 Table 4.3-1 Average Quarterly Exposure from Direct Radiation 4-11 Table 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 4-13 Table 4.4-1 Average Annual Cs-137 Concentration in Milk 4-16 Table 4.5-1 Average Annual Cs-137 Concentration in Vegetation 4-18 Table 4.6-1 Average Annual H-3 Concentration in River Water 4-21 Table 4.7-1 Average Monthly Gross Beta Concentration in Raw Drinking Water 4-23 Table 4.7-2 Average Monthly Gross Beta Concentration in Finished Drinking Water 4-24 Table 4.7-3 Average Annual H-3 Concentration in Raw Drinking Water 4-26 Table 4.7-4 Average Annual H-3 Concentration in Finished Drinking Water 4-27 Table 4.8-1 Average Annual Cs-137 Concentration in Fish 4-30 Table 4.9-1 Average Annual Be-7 Concentration in Sediment 4-32 Table 4.9-2 Average Annual Co-58 Concentration in Sediment 4-33 Table 4.9-3 Average Annual Co-60 Concentration in Sediment 4-34 Table 4.9-4 Average Annual Cs-137 Concentration in Sediment 4-35 Table 4.9-5 Additional Sediment Nuclide Concentrations 4-36 Table 5-1 Interlaboratory Comparison Program Results 5-3 iii

LIST OF ACRONYMS Acronyms presented in alphabetical order.

Acronym Definition ASTM American Society for Testing and Materials CL Confidence Level EL Georgia Power Company Environmental Laboratory EPA Environmental Protection Agency GPC Georgia Power Company ICP Interlaboratory Comparison Program MDC Minimum Detectable Concentration MDD Minimum Detectable Difference MWe MegaWatts Electric NA Not Applicable NDM No Detectable Measurement(s)

NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual Po Preoperation PWR Pressurized Water Reactor REMP Radiological Environmental Monitoring Program RL Reporting Level RM River Mile TLD Thermoluminescent Dosimeter TS Technical Specification VEGP Alvin W. Vogtle Electric Generating Plant iv

1.0 INTRODUCTION

The Radiological Environmental Monitoring Program (REMP) is conducted in accordance with Chapter 4 of the Offsite Dose Calculation Manual (ODCM). The REMP activities for 2005 are reported herein in accordance with Technical Specification (TS) 5.6.2 and ODCM 7.1.

The objectives of the REMP are to:

1) Determine the levels of radiation and the concentrations of radioactivity in the environs and;

2) Assess the radiological impact (if any) to the environment due to the operation of the Alvin W. Vogtle Electric Generating Plant (VEGP).

The assessments include comparisons between results of analyses of samples obtained at locations where radiological levels are not expected to be affected by plant operation (control stations) and at locations where radiological levels are more likely to be affected by plant operation (indicator stations), as well as comparisons between preoperational and operational sample results.

VEGP is owned by Georgia Power Company (GPC), Oglethorpe Power Corporation, the Municipal Electric Authority of Georgia, and the City of Dalton, Georgia. It is located on the southwest side of the Savannah River approximately 23 river miles upstream from the intersection of the Savannah River and U.S.

Highway 301. The site is in the eastern sector of Burke County, Georgia, and across the river from Barnwell County, South Carolina. The VEGP site is directly across the Savannah River from the Department of Energy Savannah River Site.

Unit 1, a Westinghouse Electric Corporation Pressurized Water Reactor (PWR),

with a licensed core thermal power of 3565 MegaWatts (MWt), received its operating license on January 16, 1987 and commercial operation started on May 31, 1987. Unit 2, also a Westinghouse PWR rated for 3565 MWt, received its operating license on February 9, 1989 and began commercial operation on May 19, 1989.

The pre-operational stage of the REMP began with initial sample collections in August of 1981. The transition from the pre-operational to the operational stage of the REMP occurred as Unit 1 reached initial criticality on March 9, 1987.

A description of the REMP is provided in Section 2 of this report. Maps showing the sampling stations are keyed to a table which indicates the direction and distance of each station from a point midway between the two reactors. Section 3 provides a summary of the results of the analyses of REMP samples for the year.

The results are discussed, including an assessment of any radiological impacts upon the environment and the results of the land use census and the river survey, in Section 4. The results of the Interlaboratory Comparison Program (ICP) are provided in Section 5. Conclusions are provided in Section 6.

1-1

2.0 REMP DESCRIPTION A summary description of the REMP is provided in Table 2-1. This table summarizes the program as it meets the requirements outlined in ODCM Table 4-

1. It details the sample types to be collected and the analyses to be performed in order to monitor the airborne, direct radiation, waterborne and ingestion pathways, and also delineates the collection and analysis frequencies. In addition, Table 2-1 references the locations of stations as described in ODCM Section 4.2 and in Table 2-2 of this report. The stations are also depicted on maps in Figures 2-1 through 2-3.

REMP samples are collected by Georgia Power Company's (GPC) Environmental Laboratory (EL) personnel. The same lab performs all the laboratory analyses at their headquarters in Smyrna, Georgia.

2-1

TABLE 2-1 (SHEET 1 of 5)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway and/or Number of Sampling and Collection Type and Frequency of Sample Representative Samples Frequency Analysis and Sample Locations

1. Direct Radiation Thirty nine routine Quarterly Gamma dose, quarterly monitoring stations with two or more dosimeters placed as follows:

An inner ring of stations, one in each compass sector in the general area of the site boundary; An outer ring of stations, one in each compass sector at approximately 5 miles from the site; and Special interest areas, such as population centers, nearby recreation areas, and control stations.

2. Airborne Radioiodine and Samples from seven Continuous sampler operation Radioiodine canister: I-Particulates locations: with sample collection weekly, or 131 analysis, weekly.

more frequently if required by Five locations close to dust loading. Particulate sampler:

the site boundary in Gross beta analysis' different sectors; following filter change and gamma isotopic A community having the analysis of composite highest calculated annual (by location), quarterly.

average ground level D/Q; and

TABLE 2-1 (SHEET 2 of 5)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway and/or Number of Sampling and Collection Type and Frequency of Sample Representative Samples Frequency Analysis and Sample Locations

2. Airborne Radioiodine and A control location near Particulates (cont.) a population center at a distance of about 14 miles.

3. Waterborne ___ .. _. _________

a. urfaceOne sample upriver. Composite sample over one Gamma isotopic month period4 . analysis2 , monthly.

Two samples Composite for tritium downriver. analysis, quarterly.

b. Drinking Two samples at each of Composite sample of river water I-131 analysis on each the two nearest water near the intake of each water sample when the dose treatment plants that treatment plant over two week calculated for the could be affected by period4 when I-131 analysis is consumption of the plant discharges. required for each sample; water is greater than 1 monthly composite otherwise; and mrem per year5.

Two samples at a grab sample of finished water at Composite for gross control location. each water treatment plant every beta and gamma two weeks or monthly, as isotopic analysis 2 on appropriate. raw water, monthly.

Gross beta, gamma isotopic and I-131 analyses on grab sample of finished water, monthly. Composite for tritium analysis on raw and finished water, quarterly.

c. Sediment from Shoreline Onesample from annuy Gamma isotopic downriver area with analysis 2 , semiannually.

existing or potential recreational value.

TABLE 2-1 (SHEET 3 of 5)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway and/or Number of Sampling and Collection Type and Frequency of Sample Representative Samples Frequency Analysis and Sample Locations

c. Sediment from Shoreline One sample from (cont.) upriver area with existing or potential recreational value.

4. Ingestion amma isoopic

a. Milk Two samples from Biweekly Gamma isotopic milking animals 6 at analysis 2' 7, biweekly.

control locations at a distance of about 10 miles or more.

b. Fish At least one sample of Semiannually Gamma isotopic any commercially or analysis on edible recreationally portions, semiannually.

important species near the plant discharge.

At least one sample of any commercially or recreationally important species in an area not influenced by plant discharges.

At least one sample of During the spring spawning Gamma isotopic any anadromous season. analysis2 on edible species near the plant portions, annually.

discharge.

TABLE 2-1 (SHEET 4 of 5)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway and/or Number of Sampling and Collection Type and Frequency of Sample Representative Samples Frequency Analysis and Sample Locations

c. Grass or Leafy Vegetation One sample from two Monthly during growing season. Gamma isotopic onsite locations near the analysis 2 ' 7, monthly.

site boundary in different sectors.

One sample from a control location at a distance of about 17 miles.

TABLE 2-1 (SHEET 5 of 5)

SUMMARY

DESCRIPTION OF RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Notes:

(1) Airborne particulate sample filters shall be analyzed for gross beta radioactivity 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or more after sampling to allow for radon and thoron daughter decay. If gross beta activity in air particulate samples is greater than 10 times the yearly mean of control samples, gamma isotopic analysis shall be performed on the individual samples.

(2) Gamma isotopic analysis means the identification and quantification of gamma-emitting radionuclides that may be attributable to the effluents from the facility.

(3) Upriver sample is taken at a distance beyond significant influence of the discharge. Downriver samples are taken beyond but near the mixing zone.

(4) Composite sample aliquots shall be collected at time intervals that are very short (e.g., hourly) relative to the compositing period (e.g., monthly) to assure obtaining a representative sample.

(5) The dose shall be calculated for the maximum organ and age group, using the methodology and parameters in the ODCM.

0 (6) A milking animal is a cow or goat producing milk for human consumption.

(7) If the gamma isotopic analysis is not sensitive enough to meet the Minimum Detectable Concentration (MDC) for I-13 1, a separate analysis for I-13 1 may be performed.

TABLE 2-2 (SHEET 1 of 3)

RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS Station Station Descriptive Direction' Distance Sample Type Number Type Location (miles)'

1 Indicator River Bank N 1.1 Direct Rad.

2 Indicator River Bank NNE 0.8 Direct Rad.

3 Indicator Discharge Area NE 0.6 Airborne Rad.

3 Indicator River Bank NE 0.7 Direct Rad 4 Indicator River Bank ENE 0.8 Direct Rad.

5 Indicator River Bank E 1.0 Direct Rad.

6 Indicator Plant Wilson ESE 1.1 Direct Rad.

7 Indicator Simulator SE 1.7 Airborne Rad.

Building Direct Rad.

Vegetation 8 Indicator River Road SSE 1.1 Direct Rad.

9 Indicator River Road 5 1.1 Direct Rad.

10 Indicator Met Tower SSW 0.9 Airborne Rad.

10 Indicator River Road SSW 1.1 Direct Rad.

11 Indicator River Road SW 1.2 Direct Rad.

12 Indicator River Road WSW 1.2 Airborne Rad.

Direct Rad.

13 Indicator River Road W 1.3 Direct Rad.

14 Indicator River Road WNW 1.8 Direct Rad.

15 Indicator Hancock NW 1.5 Direct Rad.

Landing Road Vegetation 16 Indicator Hancock NNW 1.4 Airborne Rad.

Landing Road Direct Rad.

17 Other Sav. River Site N 5.4 Direct Rad.

(SRS), River Road 18 Other SRS, D Area NNE 5.0 Direct Rad.

19 Other SRS, Road NE 4.6 Direct Rad.

A.13 20 Other SRS, Road ENE 4.8 Direct Rad.

A.13.1 21 Other SRS, Road E 5.3 Direct Rad.

A. 17 22 Other River Bank ESE 5.2 Direct Rad.

23 Other River Road SE 4.6 Direct Rad.

24 Other Chance Road SSE 4.9 Direct Rad.

25 Other Chance Road 5 5.2 Direct Rad.

near Highway 23 26 Other Highway 23 SSW 4.6 Direct Rad.

and Ebenezer Church Road 27 Other Highway 23 SW 4.7 Direct Rad.

opposite Boll Weevil Road 28 Other Thomas Road WSW 5.0 Direct Rad.

2-7

TABLE 2-2 (SHEET 2 of 3)

RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS Station Station Descriptive Direction1 Distance Sample Type Number Type Location (miles)1 29 Other Claxton-Lively W 5.1 Direct Rad.

Road 30 Other Nathaniel WNW 5.0 Direct Rad.

Howard Road 31 Other River Road at NW 5.0 Direct Rad.

Allen's Chapel Fork 32 Other River Bank NNW 4.7 Direct Rad.

35 Other Girard SSE 6.6 Airborne Rad.

Direct Rad.

36 Control GPC WSW 13.9 Airborne Rad.

Waynesboro Op. Direct Rad.

HQ 37 Control Substation WSW 16.7 Direct Rad Waynesboro, Vegetation GA 43 Other Employee's Rec. SW 2.2 Direct Rad.

Center 47 Control Oak Grove SE 10.4 Direct Rad.

Church 48 Control McBean NW 10.2 Direct Rad.

Cemetery 51 Control SGA School 5 11.0 Direct Rad.

Sardis, GA 52 Control Oglethorpe SW 10.7 Direct Rad.

Substation; Alexander, GA 80 Control Augusta Water NNW 29.0 Drinking Treatment Plant Water 2 81 Control Sav River N 2.5 Fish3 Sediment 4 82 Control Sav River (RM NNE 0.8 River Water 151.2) 83 Indicator Sav River (RM ENE 0.8 River Water 150.4) Sediment 4 84 Other Sav River (RM ESE 1.6 River Water 149.5) 85 Indicator Sav River ESE 4.3 Fish3 87 Indicator Beaufort-Jasper SE 76 Drinking County Water Water5 Treatment Plant 88 Indicator Cherokee Hill SSE 72 Drinking Water Treatment Water6 Plant, Port Wentworth, Ga 98 Control W.C. Dixon SE 9.8 Milk Dairy 99' Control Boyceland Dairy W 20.9 Milk 10 Control Coble Dairy WNW 16.2 Milk 2-8

TABLE 2-2 (SHEET 3 of 3)

RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS Notes:

(1) Direction and distance are determined from a point midway between the two reactors.

(2) The intake for the Augusta Water Treatment Plant is located on the Augusta Canal. The entrance to the canal is at River Mile (RM) 207 on the Savannah River. The canal effectively parallels the river. The intake to the pumping station is about 4 miles down the canal.

(3) A 5 mile stretch of the river is generally needed to obtain adequate fish samples.

Samples are normally gathered between RM 153 and 158 for upriver collections and between RM 144 and 149.4 for downriver collections.

(4) Sediment is collected at locations with existing or potential recreational value. Because high water, shifting of the river bottom, or other reasons could cause a suitable location for sediment collections to become unavailable or unsuitable, a stretch of the river between RM 148.5 and 150.5 was designated for downriver collections while a stretch between RM 153 and 154 was designated for upriver collections. In practice, collections are normally made at RM 150.2 for downriver collections and RM 153.3 for upriver collections.

(5) The intake for the Beaufort-Jasper County Water Treatment Plant is located at the end of canal that begins at RM 39.3 on the Savannah River. This intake is about 16 miles by line of sight down the canal from its beginning on the Savannah River.

(6) The intake for the Cherokee Hill Water Treatment Plant is located on Abercom Creek which is about one and a quarter creek miles from its mouth on the Savannah River at RM 29.

(7) Dairy operations ceased and milk sampling was discontinued at location 99 on September 3, 2003.

(8) Milk sample collection began at location 100 on September 30, 2003.

2-9

I 2-10 C752Z

L Radiological Environmental Sampling Locations Indicator Control Additional REMP Control Stations T11D A A A for the Plant Other * *

TLD & Other 0 D O Figure 2-2 2-11

2-12 3.0 RESULTS

SUMMARY

In accordance with ODCM 7.1.2.1, the summarized and tabulated results for all of the regular samples collected for the year at the designated indicator and control stations are presented in Table 3-1. The format of Table 3-1 is similar to Table 3 of the Nuclear Regulatory Commission (NRC) Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program", Revision 1, November 1979. Results for samples collected at locations other than indicator or control stations are discussed in Section 4 under the particular sample type.

As indicated in ODCM 7.1.2.1, the results for naturally occurring radionuclides that are also found in plant effluents must be reported along with man-made radionuclides. The radionuclide Be-7 which occurs abundantly in nature is found in some years in the plant's liquid and gaseous effluent. No other naturally occurring radionuclides are found in the plant's effluent releases. Therefore, the only radionuclides of interest in the REMP samples are the man-made radionuclides and Be-7, when it is detected in the effluent. Be-7 was not detected in plant effluents in 2005.

3-1

TABLE 3-1 (SHEET 1 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Detectable Locations Annual Mean Stations (g) . Locations Sampled Number of Concentration Mean (b), Mean (b), Mean (b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Range Range Measurement) Performed (Fraction) & Direction Range (Fraction) (Fraction) (Fraction)

Airborne Gross Beta 10 20.5 Station 16 20.9 19.4 20.4 Particulates 361 1.6-39.3 Hancock 1.7-33.3 1.9-34.2 1.9-39.0 (fCi/m3) (259/259) Landing Road (51/51) (52/52) (50/50) 1.4 miles NNW Gamma.... . .... ...

Isotopic 28 Cs-134 50 NDM (c) NDM NDM NDM Cs-137 60 NDM NDM NDM NDM Airborne 1-131 70 NDM NDM NDM NDM Radioiodine 361 (fCi/m3)

Direct Gamma NA (d) 12.5 Station 29 16.3 13.0 13.2 Radiation Dose 7.7-17.2 Claxton-Lively 15.3-16.9 9.8-16.9 10.7-16.3 (mR/91 days) 157 (62/62) Road (4/4) (72/72) (23/23) 5.1 miles W

TABLE 3-1 (SHEET 2 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Detectable Locations Annual Mean Stations (g) Locations Sampled Number of Concentration Mean (b), M (b) Mean (b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), Mean , Range Measurement) Performed (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

Milk (pCi/I) Gamma Isotopic 46 Cs-134 15 NA NDM NA NDM Cs-137 18 NA NDM NA NDM Ba-140 60 NA NDM NA NDM La-140 15 NA NDM NA NDM 1-131 1 NA NDM NA NDM 46 Vegetation Gamma (pCi/kg-wet) Isotopic 36 1-131 60 NDM NDM NA NDM Cs-134 60 NDM NDM NA NDM Cs-137 _ 4_.5 Statio 16 75.6 N NDM 23.5-75.6 Hancock (1/12)

(2/24) Landing Road 1.4 miles NNW

TABLE 3-1 (SHEET 3 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Number Detectable Locations Annual Mean Stations (g) Locations Sampled of Analyses Concentration Mean (b), Mean (b), Mean (b),

(Unit of Performed (MDC) (a) Range Name Distance Mean (b), Range Measurement) (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

River Water Gamma (pCi/l) Isotopic 36 Be-7 124(e) NDM NDM NDM NDM Mn-54 15 NDM NDM NDM NDM Fe-59 30 NDM NDM NDM NDM Co-58 15 NDM NDM NDM NDM Co-60 15 NDM NDM NDM NDM Zn-65 30 NDM NDM NDM NDM Zr-95 30 NDM NDM NDM NDM Nb-95 15 NDM NDM NDM NDM 1-131 15 NDM NDM NDM NDM Cs-134 15 NDM NDM NDM NDM Cs-137 18 NDM NDM NDM NDM Ba-140 60 NDM NDM NDM NDM La- 140 15 NDM NDM NDM NDM Tritium 3000 800 Station 83 800 712 458 12 334-1420 RM 150.4 334-1420 276-1400 306-610 (4/4) 0.8 miles ENE (4/4) (4/4) (2/4)

TABLE 3-1 (SHEET 4 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Total Minimum Indicator Location with the Highest Other Control Pathway Number of Detectable Locations Annual Mean Stations (g) Locations Sampled Analyses Concentration Mean (b), Mean (b), Mean (b),

(Unit of Performed (MDC) (a) Range Name Distance Mean (b), Range Measurement) (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

Water Near Gross Beta 4 3.75 Station 87 4.53 NA 2.48 Intakes to 36 1.32-11.04 Beaufort 1.43-11.04 1.28-3.39 Water (23/24) 76 miles SE (12/12) (11/12)

Treatment Plants (pCi/l) _-

Gamma Isotopic 36 Be-7 124(e) NDM NDM NA NDM Mn-54 15 NDM NDM NA NDM Fe-59 30 NDM NDM NA NDM Co-58 15 NDM NDM NA NDM Co-60 15 NDM NDM NA NDM Zn-65 30 NDM NDM NA NDM Zr-95 30 NDM NDM NA NDM Nb-95 15 NDM NDM NA NDM 1-131(f) 15 NDM NDM NA NDM Cs-134 15 NDM NDM NA NDM Cs-137 18 NDM NDM NA NDM Ba-140 60 NDM NDM NA NDM La-140 15 NDM __ .NDM NA _ NDM Tritium 3000 463 Station 87 483 NA 393 12 259-677 Beaufort 363-600 344-442 (8/8) 76 miles SE (4/4) (2/4)

TABLE 3-1 (SHEET 5 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Detectable Locations Annual Mean Stations (g) Locations Sampled Number of Concentration Mean (b), M b Mean (b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), ean (b), Range Measurement) Performed (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

Finished Water Gross Beta 4 2.61 Station 87 2.74 NA 2.00 at Water 36 1.66-5.19 Beaufort 1.92-5.19 1.01-3.80 Treatment (24/24) 76 miles SE (12/12) (11/12)

Plants (pCi/l)

Gamma Isotopic 36 Be-7 124(e) NDM NDM NA NDM Mn-54 15 NDM NDM NA NDM Fe-59 30 NDM NDM NA NDM Co-58 15 NDM NDM NA NDM Co-60 15 NDM NDM NA NDM Zn-65 30 NDM NDM NA NDM Zr-95 30 NDM NDM NA NDM Nb-95 15 NDM NDM NA NDM 1-131 1 NDM NDM NA NDM Cs-134 15 NDM NDM NA NDM Cs-137 18 NDM NDM NA NDM Ba-140 60 NDM NDM NA NDM La-140 15 NDM La-4015..... NDM NA NDM NM..

...NDM..

Tritium 2000 Stan 87 564 A46 12 435-735 Beaufort 435-724 (1/4)

(8/8) 76 miles SE (4/4)

TABLE 3-1 (SHEET 6 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Detectable Locations Annual Mean Stations (g) Locations Sampled Number of Concentration Mean (b), M b Mean (b),

(Unit of Analyses (MDC) (a) Range Name Distance Mean (b), ean (b), Range Measurement) Performed (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

Anadromous Gamma Fish Isotopic (pCi/kg-wet) 1 Be-7 655(e) NDM NDM NA NA Mn-54 130 NDM NDM NA NA Fe-59 260 NDM NDM NA NA Co-58 130 NDM NDM NA NA It, Co-60 130 NDM NDM NA NA Zn-65 260 NDM NDM NA NA Cs-134 130 NDM NDM NA NA Cs-137 150 28.8 NDM NA NA

. _ (1/1)

Fish Gamma (pCi/kg-wet) Isotopic 2

Be-7 655(e) NDM NDM NA NDM Mn-54 130 NDM NDM NA NDM Fe-59 260 NDM NDM NA NDM Co-58 130 NDM NDM NA NDM Co-60 130 NDM NDM NA NDM Zn-65 260 NDM NDM NA NDM Cs-134 130 NDM NDM NA NDM Cs-137 150 39.3 Station 81 40.2 NA 40.2 (1/1) 2.5 miles N (1/1) (1/1)

TABLE 3-1 (SHEET 7 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Medium or Type and Minimum Indicator Location with the Highest Other Control Pathway Total Number Detectable Locations Annual Mean Stations (g) Locations Sampled of Analyses Concentration Mean (b), Mean (b),

(Unit of Performed (MDC) (a) Range Name Distance Mean (b),ean (b), Range Measurement) (Fraction) & Direction Range (Fraction) Range (Fraction)

(Fraction)

Sediment Gamma (pCi/kg-dry) Isotopic 4

Be-7 655(e) 1931 Station 83 1931 NA 1086 1325-2538 0.8 miles ENE 1325-2538 556-1616

-_ _ ___ __ . __ _ _ _ tto (2/29_ _2.2_

Co-60 70(e) 146 Station 146 NA NDM x

(1/2) 0.8 miles ENE (1/2)

Cs---- 150 - .... .N. - NA .. . . . . NDM ......................

Cs-137 180 263 Station 83 263 NA 89 135-391 0.8 miles ENE 135-391 80-99 (2/2) (2/2) (2/2)

TABLE 3-1 (SHEET 8 of 8)

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

Vogtle Electric Generating Plant, Docket Nos. 50-424 and 50-425 Burke County, Georgia Notes:

a. The MDC is defined in ODCM 10.1. Except as noted otherwise, the values listed in this column are the detection capabilities required by ODCM Table 4-3. The values listed in this column are a priori (before the fact) MDCs. In practice, the a posteriori (after the fact) MDCs are generally lower than the values listed. Any a posteriori MDC greater than the value listed in this column is discussed in Section 4.

b. Mean and range are based upon detectable measurements only. The fraction of all measurements at a specified location that are detectable is placed in parenthesis.

c. No Detectable Measurement(s).

d. Not Applicable.

e. The EL has determined that this value may be routinely attained under normal conditions. No value is provided in ODCM Table 4-3.

f. Item 3 of ODCM Table 4-1 implies that an 1-131 analysis is not required to be performed on water samples when the dose calculated from the consumption of water is less then 1 mrem per year. However, I-131 analyses have been performed on the finished drinking water samples.

g. "Other" stations, as identified in the "Station Type" column of Table 2-2, are "Community" and/or "Special" stations.

4.0 DISCUSSION OF RESULTS Included in this section are evaluations of the laboratory results for the various sample types. Comparisons were made between the difference in mean values for pairs of station groups (e.g., indicator and control stations) and the calculated Minimum Detectable Difference (MDD) between these pairs at the 99%

Confidence Level (CL). The MDD was determined using the standard Student's t-test. A difference in the mean values that was less than the MDD was considered to be statistically indiscernible.

The 2005 results were compared with past results, including those obtained during preoperation. As appropriate, results were compared with their Minimum Detectable Concentrations (MDC) and Reporting Levels (RL) which are listed in Tables 4-1 and 4-2 of this report, respectively. The required MDCs were achieved during laboratory sample analysis. Any anomalous results are explained within this report.

Results of interest are graphed to show historical trends. The data points are tabulated and included in this report. The points plotted and provided in the tables represent mean values of only detectable results. Periods for which no detectable measurements (NDM) were observed or periods for which values were not applicable (e.g., milk indicator, etc.) are listed as NDM and are plotted in the tables as 0's.

Table 4-1 Minimum Detectable Concentrations (MDC)

Analysis Water Airborne Fish Milk Grass or Sediment (pCi/l) Particulate (pCi/kg- (pCi/I) Leafy (pCi/kg) or Gases wet) Vegetation (fCi/m3) (pCi/kg-wet)

Gross Beta 4 10 _ __

H-3 2000 (a)

Mn-54 15 130 Fe-59 30 260 Co-58 15 130 Co-60 15 130 Zn-65 30 260 _

Zr-95 30 Nb-95 15 I-131 1 (b) 70 1 60 Cs-134 15 50 130 15 60 150 Cs-137 18 60 150 18 80 180 Ba-140 60 60 La-140 15 15 (a) If no drinking water pathway exists, a value of 3000 pCi/l may be used.

(b) If no drinking water pathway exists, a value of 15 pCi/A may be used.

4-1

Table 4-2 Reporting Levels (RL)

Analysis Water Airborne Fish Milk (pCi/l) Grass or (pCi/l) Particulate (pCi/kg-wet) Leafy or Gases Vegetation

_ 20__000 (a) (fCi/m3) (pCi/kg-wet)

H-3 20,000 (a) __ _ _ _ __ _ _ _ _ _

Mn-54 1000 30,000 Fe-59 400 10,000 Co-58 1000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-95 400 Nb-95 700 I-131 2 (b) 900 3 100 Cs-134 30 10,000 1000 60 1000 Cs-137 50 20,000 2000 70 2000 Ba-140 200 300 La-140 100 400 (a) This is the 40 CFR 141 value for drinking water samples. If no drinking water pathway exists, a value of 30,000 may be used.

(b) If no drinking water pathway exists, a value of 20 pCi/l may be used.

Atmospheric nuclear weapons tests from the mid 1940s through 1980 distributed man-made nuclides around the world. The most recent atmospheric tests in the 1970s and in 1980 had a significant impact upon the radiological concentrations found in the environment prior to and during preoperation, and the earlier years of operation. Some long lived radionuclides, such as Cs-137, continue to have some impact. A significant component of the Cs-137 which has often been found in various samples over the years (and continues to be found) is attributed to the nuclear weapons tests.

Data in this section has been modified to remove any obvious non-plant short term impacts. The specific short term impact data that has been removed includes: the nuclear atmospheric weapon test in the fall of 1980; abnormal releases from the Savannah River Site (SRS) during 1987 and 1991; and the Chernobyl incident in the spring of 1986.

In accordance with ODCM 4.1.1.2.1, deviations from the required sampling schedule are permitted, if samples are unobtainable due to hazardous conditions, unavailability, inclement weather, equipment malfunction or other just reasons.

Deviations from conducting the REMP as described in Table 2-1 are summarized in Table 4-3 along with their causes and resolutions. As discussed in Section 4.2, during 2005 there were four deviations which resulted in loss of data.

4-2

All results were tested for conformance with Chauvenet's criterion (G. D. Chase and J. L. Rabinowitz, Principles of Radioisotope Methodolog , Burgess Publishing Company, 1962, pages 87-90) to identify values which differed from the mean of a set by a statistically significant amount. Identified outliers were investigated to determine the reason(s) for the difference. If equipment malfunction or other valid physical reasons were identified as causing the variation, the anomalous result was excluded from the data set as non-representative. No data were excluded exclusively for failing Chauvenet's criterion. Data exclusions are discussed in this section under the appropriate sample type.

4-3

TABLE 4-3 DEVIATIONS FROM RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM COLLECTION AFFECTED DEVIATION CAUSE RESOLUTION PERIOD SAMPLES 1st Quarter 2005 TLD Station #1 No direct radiation data. Unable to collect TLDs because station Replaced TLDs when water level was underwater due to high river level. receded.

1 " Quarter 2005 TLD Station #47 No direct radiation data. Tree where TLDs were in attached was TLDs were replaced with blanks at cut down. mid-quarter.

5/3/05-5/10/05 Girard AF/AC Non-representative sample of Small hole found in air filter. Replaced filter at beginning of week.

Station 35 airborne particulates.

7/27/05-8/2/05 Waynesboro AF/AC Non-representative sample of Power loss at air station. Contacted Distribution about power Station 36 airborne particulates. loss.

8/2/05-8/9/05 Waynesboro AF/AC Non-representative sample of Power loss at air station. Power restored on 8/10/05 at 12:56pm.

Station 36 airborne particulates.

8/2/05-8/9/05 River Road AF/AC Non-representative sample of Station only ran 55 hours6.365741e-4 days 0.0153 hours 9.093915e-5 weeks 2.09275e-5 months due to storm. Station operation satisfactory after Station 12 airborne particulates. sample change out.

8/2/05-8/9/05 Hancock Landing Non-representative sample of Station only ran 55 hours6.365741e-4 days 0.0153 hours 9.093915e-5 weeks 2.09275e-5 months due to storm. Station operation satisfactory after AF/AC Station 16 airborne particulates. sample change out.

8/9/05-8/16/05 Girard AF/AC Non-representative sample of Sample time short 85 hours9.837963e-4 days 0.0236 hours 1.405423e-4 weeks 3.23425e-5 months . Total volume was calculated. Station Station 35 airborne particulates. operation satisfactory after sample change out.

8/9/05-8/16/05 Waynesboro AF/AC Non-representative sample of Power loss at air station. Power restored on 8/10/05 at 12:56pm.

Station 36 airborne particulates.

1 st Semi-Annual Fish Collection Unable to obtain fish samples. High river levels existed up until next Performed fish sampling when water Period of 2005 sample collection period. levels permitted during second semi-annual period.

10/4/05-10/11/05 Hancock Landing Non-representative sample of Filter apparatus not completely Double check connections to ensure AF/AC Station 16 airborne particulates. attached: proper installation.

10/25/05-12/31/05 W. C. Dixon Dairy No milk samples available. Cows were sold. Owner may purchase Will keep in contact with owner to find more cows in the future. out when/if milk samples will be available.

11/8/05-11/22/05 Coble Dairy No milk samples available. Coble moved cows to new location. Dairy employees will start providing samples on 12/6/05.

11/22/05-11/29/05 Waynesboro AF/AC Non-representative sample of Air filter not centered in sample holder. Double check filter placement during Station 36 airborne particulates. _ change out.

4th Quarter 2005 TLD Station #14 Non-representative sample of TLDs missing at the end of the quarter. TLDs replaced at the beginning of the airborne particulates. next quarter.

4.1 Land Use Census and River Survey In accordance with ODCM 4.1.2, a land use census was conducted on November 15, 2005 to determine the locations of the nearest permanent residence, milk animal, and garden of greater than 500 square feet producing broad leaf vegetation, in each of the 16 compass sectors within a distance of 5 miles; the locations of the nearest beef cattle in each sector were also determined. A milk animal is a cow or goat producing milk for human consumption. Land within SRS was excluded from the census. The census results are tabulated in Table 4.1-1.

Table 4.1-1 LAND USE CENSUS RESULTS Distance in Miles to the Nearest Location in Each Sector SECTOR RESIDENCE MILK BEEF GARDEN ANIMAL CATTLE N None None None None NNE None None None None NE None None None None ENE None None None None E None None None None ESE 4.2 None None None SE 4.4 None 5.0 None SSE 4.6 None 4.6 None S 4.4 None None None SSW 4.7 None 4.5 None SW 2.7 None 4.9 None WSW 1.2 None 2.7 3.2 W 3.7 None 4.4 None WNW 1.8 None None 3.3 NW 1.6 None 1.9 None NNW 1.5 None None None ODCM 4.1.2.2.1 requires a new controlling receptor to be identified, if the land use census identifies a location that yields a calculated receptor dose greater than the one in current use. It was determined that no change in the controlling receptor was required in 2005.

ODCM 4.1.2.2.2 requires that whenever the land use census identifies a location which yields a calculated dose (via the same ingestion pathway) 20% greater than that of a current indicator station, the new location must become a REMP station (if samples are available). None of the identified locations yielded a calculated 4-5

dose 20% greater than that for any of the current indicator stations. No milk animals were identified within five miles of the plant.

A survey of the Savannah River downstream of the plant for approximately 100 miles was conducted on September 20, 2005 to identify any withdrawal of water from the river for drinking or irrigation purposes. No such usage was identified.

These results were corroborated by checking with the Georgia Department of Natural Resources on October 31, 2005 and the South Carolina Department of Health and Environmental Control on September 22, 2005. Each of these agencies confirmed that no water withdrawal permits for drinking or irrigation purposes had been issued for this stretch of the Savannah River. The two water treatment plants used as indicator stations for drinking water are located farther downriver.

4-6

4.2 Airborne As specified in Table 2-1 and shown in Figures 2-1 through 2-3, airborne particulate filters and charcoal canisters are collected weekly at 5 indicator stations (Stations 3, 7, 10, 12 and 16) which encircle the plant at the site periphery, at a nearby community station (Station 35) approximately 7 miles from the plant, and at a control station (Station 36) which is approximately 14 miles from the plant. At each location, air is continuously drawn through a glass fiber filter to retain airborne particulate and an activated charcoal canister is placed in series with the filter to adsorb radioiodine.

Each particulate filter is counted for gross beta activity. A quarterly gamma isotopic analysis is performed on a composite of the air particulate filters for each station. Each charcoal canister is analyzed for 1-131.

As provided in Table 3-1, the 2005 annual average weekly gross beta activity was 20.5 fCi/m 3 for the indicator stations. It was 0.1 fCi/m 3 greater than the control station average of 20.4 fCi/m 3 for the year. This difference is not statistically discernible, since it is less than the calculated MDD of 2.7 fCi/m 3 .

The 2005 annual average weekly gross beta activity at the Girard community station was 19.4 fCi/m 3 which was 1.0 fCi/m3 less than the control station average.

This difference is not statistically discernible since it is less than the calculated MDD of fCi/m3 .

The historical trending of the average weekly gross beta air concentrations for each year of operation and the preoperational period (September, 1981 to January, 1987) at the indicator, control and community stations is plotted in Figure 4.2-1 and listed in Table 4.2-1. In general, there is close agreement between the results for the indicator, control and community stations. This close agreement supports the position that the plant is not contributing significantly to the gross beta concentrations in air.

4-7

Figure 4.2-1 Average Weekly Gross Beta Air Concentration 30 25

~E 20 C.,

4-0 , . .....

I.-

4-o ~105 _ ___ _E _ ___ __ _

0 co 5

0 Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

-+-indicator -U--Control ACommunity -MDCI Table 4.2-1 Average Weekly Gross Beta Air Concentration Period l Indicator (fCi/m3) [ Control T Community

_ I (fCi/m3) l (fCi/m3)

Pre-op 22.9 22.1 21.9 1987 26.3 23.6 22.3 1988 24.7 23.7 22.8 1989 19.1 18.2 18.8 1990 19.6 19.4 18.8 1991 19.3 19.2 18.6 1992 18.7 19.3 18.0 1993 21.2 21.4 20.3 1994 20.1 20.3 19.8 1995 21.1 20.7 20.7 1996 23.3 21.0 20.0 1997 20.6 20.6 19.0 1998 22.7 22.4 20.9 1999 22.5 21.9 22.2 2000 24.5 21.5 21.1 2001 22.4 22.0 22.7 2002 19.9 18.9 18.6 2003 19.4 20.5 18.3 2004 21.6 22.8 21.4 2005 20.5 20.4 19.4 4-8

During 2005, no man-made radionuclides were detected from the gamma isotopic analysis of the quarterly composites of the air particulate filters. In 1987, Cs-137 was found in one indicator composite at a concentration of 1.7 fCi/m3 . During pre-operation, Cs-137 was found in approximately 12% of the indicator composites and 14% of the control composites with average concentrations of 1.7 and 1.0 fCi/m 3 , respectively. The MDC for airborne Cs-137 is 60 fCi/m 3 . Also, during pre-operation, Cs-134 was found in about 8% of the indicator composites at an average concentration of 1.2 fCi/m3. The MDC for Cs-134 is 50 fCi/m3.

The naturally occurring radionuclide Be-7 is typically detected in all indicator and control station gamma isotopic analysis of the quarterly composites of the air particulate filters. In 2005, Be-7 was not identified in plant gaseous effluents therefore it is not included in the 2005 REMP summary table for the airborne pathway samples. Be-7 has been detected in gaseous effluents eight of the eighteen years of plant operation. However, there was not a statistically discernible difference between the indicator and control station Be-7 concentrations in air samples in any of the years.

Airborne 1-131 was not detected in any sample during 2005. During pre-operation, positive results were obtained only during the Chernobyl incident when concentrations as high as 182 fCi/m3 were observed. The MDC and RL for airborne I-13 1 are 70 and 900 fCi/m 3 , respectively.

Table 4-3 lists REMP deviations that occurred in 2005. There were nine air sampling deviations. Six of these involved power losses to the air station; at least two of the six were storm related outages. Two of the nine deviations involved errors in placement of filters/filter holders. One deviation was due to a hole in the air filter. The sample results of six of the nine deviations passed Chauvenet's Criterion and were retained in the air sample database. Three of the deviations resulted in data exclusions from the database.

4-9

4.3 Direct Radiation Direct (external) radiation is measured with thermoluminescent dosimeters (TLDs). Two Panasonic UD-814 TLD badges are placed at each station. Each badge contains three phosphors composed of calcium sulfate crystals (with thulium impurity). The gamma dose at each station is based upon the average readings of the phosphors from the two badges. The badges for each station are placed in thin plastic bags for protection from moisture while in the field. The badges are nominally exposed for periods of a quarter of a year (91 days). An inspection is performed near mid-quarter to assure that all badges are on-station and to replace any missing or damaged badges.

Two TLD stations are established in each of the 16 compass sectors, to form 2 concentric rings. The inner ring (Stations 1 through 16) is located near the plant perimeter as shown in Figure 2-1 and the outer ring (Stations 17 through 32) is located at a distance of approximately 5 miles from the plant as shown in Figure 2-2. The 16 stations forming the inner ring are designated as the indicator stations. The two ring configuration of stations was established in accordance with NRC Branch Technical Position "An Acceptable Radiological Environmental Monitoring Program", Revision 1, November 1979. The 6 control stations (Stations 36, 37, 47, 48, 51 and 52) are located at distances greater than 10 miles from the plant as shown in Figure 2-2. Monitored special interest areas consist of the following: Station 35 at the town of Girard, and Station 43 at the employee recreational area. The TLD mean and range values presented in the "Other" column in Table 3-1 (page 1 of 8) includes the outer ring stations (stations 17 through 32) as well as stations 35 and 43.

As provided in Table 3-1 the average quarterly exposure measured at the indicator stations was 12.5 mR with a range of 7.7 to 17.2 mR. This average was 0.7 mR less than the average quarterly exposure measured at the control stations (13.2 mR). This difference is not statistically discernible since it is less than the MDD of 1.0 mR. Over the operational history of the site, the annual average quarterly exposures shows a variation of no more than 0.7 mR difference between the indicator and control stations. The overall average quarterly exposure for the control stations during preoperation was 1.2 mR greater than that for the indicator stations.

The quarterly exposures acquired at the outer ring stations during 2005 ranged from 9.8 to 16.9 mR with an average of 12.9 mR which was 0.3 mR less than that for the control stations. However, this difference is not discernible since it is less than the MDD of 1.0 mR. For the entire period of operation, the annual average quarterly exposures at the outer ring stations vary by no more than 1.2 mR from those at the control stations. The overall average quarterly exposure for the outer ring stations during preoperation was 1.8 mR less than that for the control stations.

The historical trending of the average quarterly exposures for the indicator inner ring, outer ring, and the control stations are plotted in Figure 4.3-1 and listed in Table 4.3-1. The decrease between 1991 and 1992 values is attributed to a change in TLDs from Teledyne to Panasonic. It should be noted however that the differences between indicator and control and outer ring values did not change.

The close agreement between the station groups supports the position that the plant is not contributing significantly to direct radiation in the environment.

4-10

Figure 4.3-1 Average Quarterly Exposure from Direct Radiation 20 18 16 14 I7

- IIIIIII II 71E M 12

,) 10 0

0 8 I Il+~I I tH 6

TIl [ I I I I lI I I I I 1 IL 4

2 0

I11I111111 Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year

- *-Indicator -- oControl O Outer Ring Table 4.3-1 Average Quarterly Exposure from Direct Radiation Period l Indicator l Control Outer Ring l (mR) J (mR) l (mR)

Pre-op 15.3 16.5 14.7 1987 17.6 17.9 16.7 1988 16.8 16.1 16.0 1989 17.9 18.4 17.2 1990 16.9 16.6 16.3 1991 16.9 17.1 16.7 1992 12.3 12.5 12.1 1993 12.4 12.4 12.1 1994 12.3 12.1 11.9 1995 12.0 12.5 12.3 1996 12.3 12.2 12.3 1997 13.0 13.0 13.1 1998 12.3 12.7 12.4 1999 13.6 13.5 13.4 2000 13.5 13.6 13.5 2001 12.9 13.0 12.9 2002 12.8 12.9 12.6 2003 12.2 12.5 12.4 2004 12.4 12.2 12.3 2005 12.5 13.2 12.9 4-11 C-, k?

The historical trending of the average quarterly exposures at the special interest areas for the same periods are provided in Figure 4.3-2 and listed in Table 4.3-2.

These exposures are within the range of those acquired at the other stations. They too, show that the plant is not contributing significantly to direct radiation at the special interest areas.

Figure 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 Year

-l- Hunting Cabin (Sta 33) -U- Girard (Sta 35) A- Rec Center (Sta 43) 4-12 0271

Table 4.3-2 Average Quarterly Exposure from Direct Radiation at Special Interest Areas Period Station 33 j Station 35 l Station 43 l (mR) (mR (mR)

Pre-op 16.6 15.1 15.3 1987 21.3 18.5 15.2 1988 19.7 18.1 14.8 1989 21.2 18.7 17.4 1990 16.8 18.9 16.2 1991 17.3 19.6 17.0 1992 12.8 13.5 12.0 1993 12.9 13.3 12.1 1994 12.6 13.6 12.0 1995 13.3 13.5 12.3 1996 13.0 13.6 12.1 1997 13.8 14.4 12.7 1998 13.5 13.7 12.5 1999 NA 14.5 12.7 2000 NA 14.8 13.1 2001 NA 14.0 12.6 2002 NA 14.0 12.1 2003 NA 14.1 12.2 2004 NA 14.2 11.7 2005 NA 15.2 12.7 The hunting cabin activities at Station 33 have been discontinued and, consequently, this location is no longer considered as an area of special interest.

Monitoring at this location was discontinued at the end of 1998.

There were three deviations from the REMP pertaining to measuring quarterly gamma doses during 2005. These deviations are listed in Table 4-3. All three deviations led to data exclusions from the database. In two of these cases, the TLDs were missing or destroyed therefore no data was available for those stations.

In one case, blanks were put in place at mid-quarter and the results failed Chauvenet's Criterion.

The standard deviation for the quarterly result for each badge was subjected to a self imposed limit of 1.4. This limit is based upon the standard deviations obtained with the Panasonic UD-814 badges during 1992 and is calculated using a method developed by the American Society of Testing and Materials (ASTM Special Technical Publication 15D, ASTM Manual on Presentation of Data and Control Chart Analysis, Fourth Revision, Philadelphia, PA, October 1976).

The limit serves as a flag to initiate an investigation. To be conservative, readings with a standard deviation greater than 1.4 are excluded since the high standard deviation is interpreted as an indication of unacceptable variation in TLD response.

4-13

The readings for the following badges were deemed unacceptable since the standard deviation for each badge was greater than the self-imposed limit of 1.4:

First Quarter: V30A, V32B, V45B, V47A Second Quarter: V16B, V23A, V31B, V37B Third Quarter: None Fourth Quarter: None However, for these cases when only one badge exceeded a standard deviation of 1.4, the companion badges were available and were used for determining the quarterly doses. The badges exceeding the self-imposed limit were visually inspected under a microscope and the glow curve and test results for the anneal data and the element correction factors were reviewed. No reason was evident for the high standard deviation.

4-14

4.4 Milk In accordance with Tables 2-1 and 2-2, milk samples are collected biweekly from two control locations, the W. C. Dixon Dairy (Station 98) and the Boyceland Dairy (Station 99). The Boyceland Dairy discontinued operations in 2003. The last sample was collected on September 3, 2003, and Coble Dairy (Station 100) was added soon after as a replacement location. In the fall of 2005, W. C. Dixon Dairy sold his cows but indicated that he may purchase more cows in 2006. Coble Dairy also had some business changes. The cows were moved in November 2005 from the location on Hwy. 25 to a nearby location on Hwy. 80 north of Waynesboro. No milk samples were available for the two collection periods in November due to milking and processing activities in the new location. A schedule was agreed upon by the Coble employees to provide samples twice a month. Gamma isotopic and 1-131 analyses are performed on each milk sample.

No indicator station (a location within 5 miles of the plant) for milk has been available since April 1986. As discussed in Section 4.1, no milk animal was found during the 2005 land use census.

No man-made radionuclide was identified during the gamma isotopic analysis of the milk samples in 2005. The MDC and RL for Cs-137 in milk are 18 and 70 pCi/l, respectively. During preoperation and each year of operation through 1991, Cs-137 was found in 2 to 6% of the samples at concentrations ranging from 5 to 27 pCi/l. During preoperation, Cs- 134 was detected in one sample and in the first year of operation, Zn-65 was detected in one sample. Figure 4.4-1 and Table 4.4-1 provide the historical trending of the Cs- 137 concentration in milk.

Figure 4.4-1 Average Annual Cs-137 Concentration in Milk 20 - -- -

18 - - _ -

16 A=_

14 X- - _-_ =-

C)

.0

~10 1.

U 2 - -

Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I -- Indicator -C--Control -M DC 4-15 C 2?I

Table 4.4-1 Average Annual Cs-137 Concentration in Milk Year Indicator l Control

._I (pCi/l) (pCi/l)

Pre-op 18.5 18 1987 NDM 10.4 1988 NDM 6.9 1989 NDM 7 1990 NDM 17 1991 NDM 14.2 1992 NDM NDM 1993 NDM NDM 1994 NDM NDM 1995 NDM NDM 1996 NDM NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM During 2005, I-131 was not detected in any of the milk samples. Since operations began in 1987, 1-131 may have been detected in one sample in 1996 and two during 1990; however, its presence in these cases was questionable, due to large counting uncertainties. During preoperation, positive I-131 results were found only during the Chernobyl incident with concentrations ranging from 0.53 to 5.07 pCi/l. The MDC and RL for I-13 1 in milk are 1 and 3 pCi/l, respectively.

4-16

4.5 Vegetation In accordance with Tables 2-1 and 2-2, grass samples are collected monthly at two indicator locations onsite near the site boundary (Stations 7 and 15) and at one control station located about 17 miles WSW from the plant (Station 37). Gamma isotopic analyses are performed on the samples. During 2005, two samples out of the 24 samples collected at the indicator stations were positive for the man-made radionuclide, Cs-137. The average of the two positive indicator samples was 49.5 pCi/kg-wet. None of the 12 samples collected at the control stations were positive for Cs- 137. The levels seen at the indicator stations could potentially be attributed to plant effluents. However, Cs-137 is sometimes detected in environmental samples as a result of atmospheric weapons testing and the Chernobyl incident.

The historical trending of the average concentration of Cs-137 at the indicator and control stations is provided in Figure 4.5-1 and listed in Table 4.5-1. No trend is recognized in this data. The MDC and RL for Cs-137 in vegetation samples are 80 and 2000 pCi/kg-wet, respectively. Cs-137 is the only man-made radionuclide that has been identified in vegetation samples during the operational history of the plant. During preoperation, Cs-137 was found in approximately 60% of the samples from indicator stations and in approximately 20% of the samples from the control station. These percentages have generally decreased during operation.

The naturally occurring radionuclide Be-7 is typically detected in indicator and control station vegetation samples. Be-7 was not detected in gaseous effluents in 2005, therefore it is not included in the REMP summary table for the airborne pathway samples. Be-7 has been detected in gaseous effluents eight of the eighteen years of plant operation and is therefore of interest in the REMP program. However, the levels of Be-7 found in the REMP make no significant contribution to dose.

In May and June of 1986 during preoperation, as a consequence of the Chernobyl incident, I- 131 was found in nearly all the samples collected for a period of several weeks in the range of 200 to 500 pCi/kg-wet. The MDC and RL for 1-131 in vegetation are 60 and 100 pCi/kg-wet, respectively. Also during this time period, Co-60 was found in one of the samples at a concentration of 62.5 pCi/kg-wet.

There is no specified MDC or RL for Co-60 in vegetation.

4-17

L Figure 4.5-1 Average Annual Cs-137 Concentration in Vegetation 200 - - - - - - -

180__

Z160 *

~140 O 120 C 100--

80

= 60- - - - - -_-

0 O40, T fl Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I+--Indicator Control - MDC Table 4.5-1 Average Annual Cs-137 Concentration in Vegetation Year Indicator Control (pCi/kg-wet) (pCi/kg-wet)

Pre-op 54.6 43.7 1987 24.4 61.5 1988 38.7 NDM 1989 9.7 NDM 1990 30.0 102.0 1991 35.3 62.4 1992 38.1 144.0 1993 46.4 34.1 1994 20.7 57.4 1995 57.8 179.0 1996 NDM I _NDM 1997

_ NDM __32.6 1998 T NDM 50.1 1999 37.2 I NDM 2000 1 36.6 NDM 2001 NDM __NDM 2002 _ NDM 98.3 2003 24.5 NDM 2004 _ 36.8 19.7 2005 49.5 NDM 4-18 C2rcA

4.6 River Water Surface water from the Savannah River is obtained at three locations using automatic samplers. Small quantities are drawn at intervals not exceeding a few hours. The samples drawn are collected monthly; quarterly composites are produced from the monthly collections.

The collection points consist of a control location (Station 82) which is located about 0.4 miles upriver of the plant intake structure, an indicator location (Station

83) which is located about 0.4 miles downriver of the plant discharge structure, and a special location (Station 84) which is located approximately 1.3 miles downriver of the plant discharge structure. A statistically significant increase in the concentrations found in samples collected at the indicator station compared to those collected at the control station could be indicative of plant releases.

Concentrations found at the special station are more likely to represent the activity in the river as a whole, which might include plant releases combined with those from other sources along the river.

A gamma isotopic analysis is conducted on each monthly sample. As in all previous years, there were no gamma emitting radionuclides of interest detected in the 2005 river water samples.

Each quarterly composite is analyzed for tritium. As indicated in Table 3-1, the average concentration found at the indicator station was 800 pCi/l which was 342 pCi/l greater than that found at the control station (458 pCi/l). This difference is not statistically discernible since it is less than the calculated MDD of 1333 pCi/I.

The MDC for tritium in river water used to supply drinking water is 2000 pCi/l and the RL is 20,000 pCi/l.

At the special river water sampling station, the results ranged from 276 pCi/l to 1400 pCi/l with an average of 713 pCi/l. The decrease in tritium concentration between the indicator station and the special station is due to the additional dispersion over the 0.9 miles that separates the two stations. In the first two years of operation, the tritium concentration at the, special station was somewhat greater than that at the indicator station. In recent years, the level at the special station has generally become less than the level at the indicator station.

The historical trending of the average tritium concentrations found at the special, indicator, and control stations along with the MDC for tritium is plotted on Figure 4.6-1. The data for the plot is listed in Table 4.6-1. Also included in the table are data from the calculated difference between the indicator and control stations; the MDD between the indicator and control stations; and the total curies of tritium released from the plant in liquid effluents.

The annual downriver survey of the Savannah River showed that river water is not being used for purposes of drinking or irrigation for at least 100 miles downriver (discussed in Section 4.1).

4-19

Figure 4.6-1 Average Annual H-3 Concentration in River Water 3000 2500

t-(.) 2000 0.

C 0

s 1500 U) 0 C 1000 0

500 _

0 Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I -4Indicator -U--Control -*-Special - DC 4-20 CL~-O

Table 4.6-1 Average Annual H-3 Concentration in River Water Year Special Indicator Control Difference MDD Annual Site (pCi/I) (pCi/I) (pCi/I) Between (pCi/l) Tritium

. Indicator and Released Control (Ci)

(pCi/I)

Pre-op 1900 650 665 -15 145 NA 1987 1411 680 524 156 416 321 1988 1430 843 427 416 271 390 1989 1268 1293 538 755 518 918 1990 1081 1142 392 750 766 1172 1991 1298 1299 828 471 626 1094 1992 929 1064 371 693 714 1481 1993 616 X 712 - 238 474 1526 761 1994 774 1258 257 1001 2009 1052 1995 699 597 236 361 766 968 1996 719 1187 387 800 2147 1637 1997 686 1547 254 1293 1566 1449 1998 640 1226 196 1030 1313 1669 1999 859 2005 389 1616 1079 1674 2000 885 1564 496 1068 1786 869 2001 931 2101 743 1358 1696 1492 2002 1280 2628 437 2190 1211 1566 2003 800 1376 399 977 1706 1932 2004 743 1269 351 918 1061 1212 2005 713 800 458 342 1333 1860 4-21

4.7 Drinking Water Samples are collected at a control location (Station 80 - the Augusta Water Treatment Plant in Augusta, Georgia located about 56 river miles upriver), and at two indicator locations (Station 87 - the Beaufort-Jasper County Water Treatment Plant near Beaufort, South Carolina, 112 river miles downriver; and Station 88 -

the Cherokee Hill Water Treatment Plant near Port Wentworth, Georgia, 122 river miles downriver). These upriver and downriver distances in river miles are the distances from the plant to the point on the river where water is diverted to the intake for each of these water treatment plants.

Water samples are taken near the intake of each water treatment plant (raw drinking water) using automatic samplers that take periodical small aliquots from the stream. These composite samples are collected monthly along with a grab sample of the processed water coming from the treatment plants (finished drinking water). Quarterly composites are made from these monthly collections for both raw and processed river water. Gross beta and gamma isotopic analyses are performed on each of the monthly samples while tritium analysis is conducted on the quarterly composites. An 1-131 analysis is not required to be conducted on these samples, since the dose calculated from the consumption of water is less than 1 mrem per year (see ODCM Table 4-1). However, an 1-131 analysis is conducted on each of the monthly finished water grab samples, since a drinking water pathway exists.

Provided in Figures 4.7-1 and 4.7-2 and Tables 4.7-1 and 4.7-2, are the historical trends of the average gross beta concentrations found in the monthly collections of raw and finished drinking water.

For 2005, the indicator station average gross beta concentration in the raw drinking water was 3.75 pCi/I which was 1.27 pCi/l greater than the average gross beta concentration at the control station (2.48 pCi/l). This difference is not statistically discernible, since it is less than the calculated MDD of 1.29 pCi/I.

The required MDC for gross beta in water is 4.0 pCi/I. There is no RL for gross beta in water.

For 2005, the indicator station average gross beta concentration in the finished drinking water was 2.61 pCi/l which was 0.61 pCi/l greater than the average gross beta concentration at the control station (2.00 pCi/1). This difference is less than the MDD of 0.79 pCi/I and not statistically discernible. The gross beta concentrations at the indicator stations ranged from 1.66 to 5.19 pCi/l while the concentrations at the control station ranged from 1.01 to 3.80 pCi/I. The required MDC for gross beta in water is 4.0 pCi/I. There is no RL for gross beta in water.

4-22

Figure 4.7-1 Average Monthly Gross Beta Concentration in Raw Drinking Water 8-7-

C.

v-

.,2 0 --

Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I + Indicator -U--Control -MDC I Table 4.7-1 Average Monthly Gross Beta Concentration in Raw Drinking Water Period Indicator Control (pCi/i) (pCi/i)

Pre-op 2.70 1.90 1987 2.20 5.50 1988 2.67 3.04 1989 2.93 3.05 1990 2.53 2.55 1991 2.83 3.08 1992 2.73 2.70 1993 3.17 2.83 1994 3.51 3.47 1995 3.06 4.90 1996 5.83 3.02 1997 2.93 2.94 1998 3.31 2.58 1999 4.10 4.37 2000 4.52 3.59 2001 3.21 2.94 2002 3.09 2.61 2003 3.73 2.59 2004 4.06 2.39 2005 3.75 2.48 4-23

Figure 4.7-2 Average Monthly Gross Beta Concentration in Finished Drinking Water 4.5 4

3.5 1111 I111111 111 I-iS20igfI 4-3 C 2.5 0 2 I "iI/ /"* _

06 U) 1.5 U

1 _." _I _ _ _ _ _ __ I _ _

0.5 0

Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I Indicator n Control - MDC Table 4.7-2 Average Monthly Gross Beta Concentration in Finished Drinking Water Period 1 Indicator 1 Control I (pCi/I) (pci/)

Pre-op 2.90 1.80 1987 2.10 1.80 1988 2.28 2.35 1989 2.36 2.38 1990 2.08 1.92 1991 1.90 1.53 1992 2.09 1.67 1993 2.23 2.30 1994 2.40 2.68 1995 2.74 2.32 1996 2.19 2.21 1997 2.38 1.77 1998 3.23 1.67 1999 3.23 3.21 2000 3.39 2.68 2001 2.67 2.00 2002 2.80 2.61 2003 2.51 2.34 2004 2.36 1.92 2005 2.61 2.00 4-24 CL-pLz

As provided in Table 3-1, there were no positive results during 2005 for the radionuclides of interest from the gamma isotopic analysis of the monthly collections for both raw and finished drinking water. Only one positive result has been found since operation began. Be-7 was found at a concentration of 68.2 pCi/l in the sample collected for September 1987 at Station 87. During preoperation Be-7 was found in about 5% of the samples at concentrations ranging from 50 to 80 pCi/l. The MDC assigned for Be-7 in water is 124 pCi/I. Also during preoperation, Cs-134 and Cs-137 were detected in about 7% of the samples at concentrations on the order of their MDCs which are 15 and 18 pCi/l, respectively.

1-131 was detected in finished drinking water in 1997 at levels near the MDC.

This was the first occurrence for detecting 1-131 in finished drinking water since operation began. During preoperation, it was detected in only one of 73 samples at a concentration of 0.77 pCi/l at Port Wentworth. The MDC and RL for 1-131 in drinking water are 1 and 2 pCi/l, respectively.

Figures 4.7-3 and 4.7-4 and Tables 4.7-3 and 4.7-4 provide historical trending for the average tritium concentrations found in the quarterly composites of raw and finished drinking water collected at the indicator and control stations. The tables also list the calculated differences between the indicator and control stations, and list the MDDs between these two station groups.

The graphs and tables show that the tritium concentrations in the drinking water samples, both raw and finished, have been gradually trending downward since 1988. The small increase in average concentrations at the indicator stations for 1991 and 1992 reflect the impact of the inadvertent release from SRS of 7,500 Ci of tritium to the Savannah River about 10 miles downriver of VEGP, in December 1991 (SRS release data was obtained from "Release of 7,500 Curies of Tritium to the Savannah River from the Savannah River Site", Georgia Department of National Resources, Environmental Protection Division, Environmental Radiation Program, January 1992).

The 2005 raw drinking water indicator stations average tritium was 463 pCi/l which was 70 pCi/l greater than the concentration determined at the control station (393 pCi/1). The difference between the average at the indicator stations and the average at the control station is less than the calculated MDD of 301 pCi/l and therefore is not statistically discernible. For the past 3 years, the average tritium concentration seen at the indicator stations has been less than all prior years (pre-op to present) and was approximately 75% less than the pre-op average tritium concentration seen at the indicator stations (2300 pCi/1). The MDC and RL for tritium in drinking water are 2000 pCi/I and 20,000 pCi/I, respectively.

The finished drinking water average tritium concentration at the indicator stations during 2005 was 546 pCi/l which was 323 pCi/l greater than that found at the control station (223 pCi/l). Application of the modified Student's t-test shows that the difference between the average at the indicator stations and the single positive value at the control station is not statistically discernible.

4-25

Figure 4.7-3 Average Annual H-3 Concentration in Raw Drinking Water o

a. 2000 1500 co 4-,

C) 0 0

Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I---indicator -C-Control -MDC Table 4.7-3 Average Annual H-3 Concentration in Raw Drinking Water Period Indicator Control Difference MDD (pCi/i) (pCi/i) Between (pCi/l)

Indicator and Control (pCi/1)

Pre-op 2300 400 1900 1987 2229 316 1913 793 1988 2630 240 2390 580 1989 2508 259 2249 1000 1990 1320 266 1054 572 1991 1626 165 1461 834 1992 1373 179 1194 353 1993 955 NDM 955 NA 1994 871 NDM 871 NA 1995 917 201 716 NA 1996 1014 207 807 151 1997 956 230 726 61 1998 791 160 631 NA 1999 908 NDM 908 NA 2000 1020 373 647 704 2001 889 525 364 NA 2002 938 304 634 284 2003 563 203 360 NA 2004 585 220 365 204 2005 463 393 70 301 4-26

Figure 4.7-4 Average Annual H-3 Concentration in Finished Drinking Water S 2500 r 2000 0

L-E 1500 C

01000 Po 87 88 89 90 91 92 93 94ya9r5 96 97 98 99 00 01 02 03 04 05

- + Indicator -- Control - MDC Table 4.7-4 Average Annual H-3 Concentration in Finished Drinking Water Period Indicator Control Difference MDD (pCi/I) (pCi/i) Between (pCi/i)

Indicator and Control (pCi/I)

Pre-op 2900 380 2520 1987 2406 305 2101 1007 1988 2900 270 2630 830 1989 2236 259 1977 627 1990 1299 404 895 1131 1991 1471 225 1246 647 1992 1195 211 984 427 1993 993 0 993 NA 1994 880 131 749 270 1995 847 279 568 NA 1996 884 168 716 NA 1997 887 221 666 383 1998 713 180 533 NA 1999 920 263 657 NA 2000 1043 251 792 833 2001 1037 516 521 NA 2002 1060 340 720 416 2003 473 196 277 NA 2004 531 255 276 314 2005 546 223 323 NA 4-27

4.8 Fish Table 2-1 requires the collection of at least one sample of any anadromous species of fish in the vicinity of the plant discharge during the spring spawning season, and for the semi-annual collection of at least one sample of any commercially or recreationally important species in the vicinity of the plant discharge area and in an area not influenced by plant discharges. Table 2-1 specifies that a gamma isotopic analysis be performed on the edible portions of each sample collected.

As provided in Table 2-2, a 5-mile stretch of the river is generally needed to obtain adequate fish samples. For the semiannual collections, the control location (Station 81) extends from approximately 2 to 7 miles upriver of the plant intake structure, and the indicator location (Station 85) extends from about 1.4 to 7 miles downriver of the plant discharge structure. For anadromous species, all collection points can be considered as indicator stations.

The anadromous fish sample was collected on April 26, 2005 during the spring spawning season. In all but two previous years of operation, no radionuclides were detected. In 2005, Cs-137 was detected in the anadromous fish sample at a low level of 28.8 pCi/kg-wet. In 1987, as well as in 1991, Cs-137 was found in a single sample of American shad at concentrations of 10 and 12 pCi/kg-wet, respectively.

The dates and compositions of the semi-annual catches at the indicator and control stations during 2005 are shown below. During the first semi-annual period, river levels were extremely high and electrofishing was not possible.

Date Indicator Control Could not collect during NA NA first semi-annual period due to high river levels November 4 Largemouth Bass Largemouth Bass As indicated in Table 3-1, Cs-137 was the only radionuclide found in the semiannual collections of a commercially or recreationally important species of fish. It has been found in all but 4 of the 125 samples collected during operation and in all but 5 of the 32 samples collected during preoperation. As provided in Table 3-1, the concentration at the indicator station for the second semi-annual collection was 39.3 pCi/kg-wet which was 0.9 pCi/kg-wet less than that at the control station (40.2 pCi/kg-wet). No statistical analysis can be performed since there is only a single positive value at each station. No discernible difference has occurred for any year of operation or during pre-operation.

Figure 4.8-1 and Table 4.8-1 provide the historical trending of the average concentrations of Cs-137 in units of pCi/kg-wet found in fish samples at the indicator and control stations. The indicator station fish sample concentration of Cs-137 in 1999 was greatly influenced by a largemouth bass collected in October with a concentration of 2500 pCi/kg-wet. Other than the fact that largemouth bass are predators that concentrate Cs-137, no specific cause for the elevated concentration in this sample is known. No trend is recognized in this data. The MDC and RL for Cs-137 in fish are 150 and 2000 pCi/kg-wet, respectively.

4-28

Figure 4.8-1 Average Annual Cs-137 Concentration in Fish 900 _ _

800-0700 CD600 C.)

M500 Cu i=83° i-- - Xii1

~300- - - ---- - - - -

0 200 -----

100-0 9 5 Po 87 88 89 90 91 92 93 teaJ 96 97 98 99 00 01 02 03 04 05 l +-Indicator - Control -MDC I 4-29 cA

Table 4.8-1 Average Annual Cs-137 Concentration in Fish Year 1 Indicator l Control l (pCi/kg-wet) (pCi/kg-wet)

Pre-op 590 340 1987 337 119 1988 66 116 1989 117 125 1990 103 249 1991 105 211 1992 178 80 1993 360 84 1994 165 200 1995 125 96 1996 194 404 1997 93 139 1998 190 200 1999 848 221 2000 55 96 2001 48 39 2002 59 133 2003 62 21 2004 56.4 26.0 2005X 39.3 40.2 The only other radionuclide found in fish samples during operation is 1-131. In 1989, it was found in one sample at the indicator station at a concentration of 18 pCi/kg-wet. In 1990, it was found in one sample at the indicator station and in one sample at the control station, at concentrations of 13 and 12 pCi/kg-wet, respectively. The MDC assigned to 1-131 in fish is 53 pCi/kg-wet.

During preoperation, Cs-134 was found in two of the 17 samples collected at the control station at concentrations of 23 and 190 pCi/kg-wet. The MDC and RL for Cs-134 are 130 and 1000 pCi/kg-wet, respectively. Nb-95 was also found in one of the control station samples at a concentration of 34 pCi/kg-wet. The assigned MDC and calculated RL for Nb-95 are 50 and 70,000 pCi/kg-wet, respectively.

4-30

4.9 Sediment Sediment was collected along the shoreline of the Savannah River on July 6 and October 4, 2005 at Stations 81 and 83. Station 81 is a control station located about 2.5 miles upriver of the plant intake structure while Station 83 is an indicator station located about 0.6 miles downriver of the plant discharge structure. A gamma isotopic analysis was performed on each sample. The radionuclides of interest identified in 2005 samples were Be-7, Co-60, and Cs-137.

Be-7, which is abundant in nature, was not identified in plant liquid effluents during 2005. However, it continues to be trended in river sediment in the REMP report. In 2005, the average level at the indicator station was 1931 pCi/kg-dry and at the control station it was 1086 pCi/kg-dry. The difference between the average at the indicator and the control station (845 pCi/kg-dry) is not statistically discernible since it is less that the MDD of 5612 pCi/kg-dry. Because there continues to be no significant difference between the indicator and control station, the Be-7 found at the indicator station is not attributed to plant releases.

For Cs-137, the average concentration at the indicator station during 2005 was 263 pCi/kg-dry which was 174 pCi/kg-dry greater than that at the control station (89 pCi/kg-dry). The calculated MDD is 889 pCi/kg-dry. Therefore, there is no discernible difference between Cs-137 concentration in sediment at the indicator and control stations. The Cs- 137 level at the indicator station has averaged nearly 100 pCi/kg-dry greater than that at the control station over the entire period of operation. During preoperation, the Cs-137 was 170 pCi/kg-dry greater at the indicator station than at the control station.

During 2005, Co-60 was detected in one of two sediment samples at the indicator station. The concentration of the single positive sample was 146 pCi/kg-dry.

Since no Co-60 was detected in sediment collected at the control station, this concentration of Co-60 could be attributed to plant releases or, potentially, to other facilities that release radioactive effluents in the vicinity of the plant.

The historical average concentrations of Be-7, Co-58, Co-60, and Cs-137 in sediment are plotted in Figures 4.9-1 through 4.9-4 along with listings of their concentrations in Tables 4.9-1 through 4.9-4. The concentrations of the solely man-made nuclides (Co-58, Co-60, & Cs-137) are consistent with past average concentrations. No pattern has been detected. Be-7, produced by man and nature, is also within the range that is typically seen.

During preoperation, Zr-95, Nb-95, Cs-134, and Ce-141 were detected in at least one of the control station samples and Nb-95 was detected in one of the indicator station samples. Be-7 and Cs-137 were found in several of the samples. The concentrations of these preoperational nuclides were on the order of their respective MDC values. The presence of these preoperational nuclides could be attributed to atmospheric weapons testing and the Chernobyl incident.

Mn-54 and I-131 were found sporadically over several years of operation. A summary of the positive results for these nuclides along with their applicable MDCs is provided in Table 4.9-5.

4-31

Figure 4.9-1 Average Annual Be-7 Concentration in Sediment 3500 23000 E2500

0. 2000 0

15000 0

500 -

0 Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l Indicator -- Control - MDC Table 4.9-1 Average Annual Be-7 Concentration in Sediment MDC=655 pCi/kg-dry Year Indicator l Control I (pCi/kg-dry) j (pCi/kg-dry)

Pre-op 580 500 1987 987 543 1988 970 810 1989 1300 415 1990 465 545 1991 826 427 1992 2038 380 1993 711 902 1994 1203 964 1995 1865 1575 1996 1925 831 1997 1130 1028 1998 1396 1016 1999 662 769 2000 1526 3324 2001 1697 2614 2002 742 1254 2003 1150 903 2004 1309 905 2005 1931 1086 4-32

Figure 4.9-2 Average Annual Co-58 Concentration in Sediment 300 2

O250 -.

c200-C 150 . -

0 50 01-1 I--

Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l+Indicator -- Control - MDC Table 4.9-2 Average Annual Co-58 Concentration in Sediment MDC=43 pCi/kg-dry Year Indicator Control (pCi/kg-dry) (pCi/kg-dry)

Pre-op NDM NDM 1987 NDM NDM 1988 190 NDM 1989 135 NDM 1990 140 NDM 1991 NDM NDM 1992 124 NDM 1993 NDM NDM 1994 18.4 NDM 1995 42.4 NDM 1996 274 NDM 1997 NDM NDM 1998 NDM NDM 1999 NDM NDM 2000 NDM NDM 2001 NDM NDM 2002 NDM NDM 2003 NDM NDM 2004 NDM NDM 2005 NDM NDM 4-33 c,'-FJ7

Figure 4.9-3 Average Annual Co-60 Concentration in Sediment 400 350 L300 G250 0.

E 200_

.2 150-C.

100----

0 50-PO 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year l+Indicator -UControl -MDC Table 4.9-3 g Annual Co-60 Concentration in Sediment MDC=70 pCi/kg-dry Year Indicator Control (pCi/kg-dry) (pCi/kg-dry)

Pre-op NDM NDM 1987 NDM NDM 1988 62 NDM 1989 46 NDM 1990 46 NDM 1991 113 NDM 1992 59.5 NDM 1993 65.9 NDM 1994 85.2 NDM 1995 267 NDM 1996 344 NDM 1997 86 NDM 1998 263 NDM 1999 49.5 NDM 2000 131.3 NDM 2001 NDM NDM 2002 49.7 NDM 2003 146 NDM 2004 77 NDM 2005 146 NDM 4-34

Figure 4.9-4 Average Annual Cs-137 Concentration in Sediment 600 500

.400 C.)

0 0

100 Po! 8 8 8 0 9 2 9 4 9 6 9 8 9 0 0 2 0 4 0 Po 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 Year I -- Indicator -I- Control -MDC Table 4.9-4 Average Annual Cs-137 Concentration in Sediment MDC=180 pCi/kg Year Indicator Control (pCi/kg) (pCi/kg)

Pre-op 320 150 1987 209 111 1988 175 175 1989 230 125 1990 155 140 1991 246 100 1992 259 III 1993 345 115 1994 240 118 1995 357 123 1996 541 93 1997 184 98 1998 316 122 1999 197 97 2000 138 218 2001 252 118 2002 189 60 2003 171 90 2004 149 100 2005 263 89 4-35

Table 4.9-5 Additional Sediment Nuclide Concentrations Nuclide YEAR Indicator ) Control MDC I ~(pCi/kg-dry) (pCi/kg-dry) I (pCi/kg-dry) _

Mn-54 1988 22 NDM 1989 18 NDM 42 1994 32 NDM 1-131 1992 194 20 53 1994 51 41 4-36

5.0 INTERLABORATORY COMPARISON PROGRAM In accordance with ODCM 4.1.3, the EL participates in an ICP that satisfies the requirements of Regulatory Guide 4.15, Revision 1, "Quality Assurance for Radiological Monitoring Programs (Normal Operations) - Effluent Streams and the Environment", February 1979. The guide indicates the ICP is to be conducted with the Environmental Protection Agency (EPA) Environmental Radioactivity Laboratory Intercomparison Studies (Cross-check) Program or an equivalent program, and the ICP should include all of the determinations (sample medium/radionuclide combinations) that are offered by the EPA and included in the REMP.

The ICP is conducted by Analytics, Inc. of Atlanta, Georgia. Analytics has a documented Quality Assurance (QA) program and the capability to prepare Quality Control (QC) materials traceable to the National Institute of Standards and Technology. The ICP is a third party blind testing program which provides a means to ensure independent checks are performed on the accuracy and precision of the measurements of radioactive materials in environmental sample matrices.

Analytics supplies the crosscheck samples to the EL which performs the laboratory analyses in a normal manner. Each of the specified analyses is performed three times. The results are then sent to Analytics who performs an evaluation which may be helpful to the EL in the identification of instrument or procedural problems.

The samples offered by Analytics and included in the EL analyses are gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples.

The accuracy of each result is measured by the normalized deviation, which is the ratio of the reported average less the known value to the total error. The total error is the square root of the sum of the squares of the uncertainties of the known value and of the reported average. The uncertainty of the known value includes all analytical uncertainties as reported by Analytics. The uncertainty of the reported average is the propagated error of the values in the reported average by the EL.

The precision of each result is measured by the coefficient of variation, which is defined as the standard deviation of the reported result divided by the reported average. An investigation is undertaken whenever the absolute value of the normalized deviation is greater than three or whenever the coefficient of variation is greater than 15% for all radionuclides other than Cr-51 and Fe-59. For Cr-51 and Fe-59, an investigation is undertaken when the coefficient of variation exceeds the values shown as follows:

Nuclide Concentration

Total Sample Activity Percent Coefficient

__(_Ci) of Variation Cr-51 <300 NA 25 Cr-51 NA >1000 25 Cr-5 i >300 <1000 15 Fe-59 <80 NA 25 Fe-59 >80 NA 15

For air filters, concentration units are pCi/filter. For all other media, concentration units are pCi/liter (pCi/i).

5-1

As required by ODCM 4.1.3.3 and 7.1.2.3, a summary of the results of the EL's participation in the ICP is provided in Table 5-1 for: the gross beta and gamma isotopic analyses of an air filter; gamma isotopic analyses of milk samples; and gross beta, tritium and gamma isotopic analyses of water samples. Delineated in this table for each of the media/analysis combinations, are: the specific radionuclides; Analytics' preparation dates; the known values with their uncertainties supplied by Analytics; the reported averages with their standard deviations; and the resultant normalized deviations and coefficients of variation expressed as a percentage.

In 2005, the laboratory analyzed 9 samples for 46 parameters and completed a gamma analysis investigation of Fe-59 in water. The 2005 analyses included tritium, gross beta, Fe-55, Sr-89/90 and gamma emitting radio-nuclides in different matrices. Two analyses were outside the control limit for precision. The precision deviations were for the determination of gross alpha in water and Sr-90 in an air filter.

The gross alpha in water was analyzed in triplicate with an average value reported.

The high range may be attributed to one of the samples not dispersing evenly in the planchet causing alpha absorption. The second quarter alpha sample was in control so no further investigation will be performed. The second quarter air filter sample analyzed for Sr-90 had a high precision value. The low activity in the sample produced small detector counts, thus causing the elevated error. No further investigation will be performed.

The 2004 Fe-59 analysis in water investigation was completed. The efficiencies used in determining the activity were obtained from a calibration curve. The curve was determined to be lower at higher energies due to summing effects from the calibration nuclides. A curve will be produced using a standard containing nuclides without summing gamma energies. The difference in efficiencies of the curves will be applied to the analysis to compensate for the summing losses. This is a known bias for gamma spectroscopy measurements and does not significantly effect radiological environmental monitoring measurements.

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TABLE 5-1 (SHEET 1 of 3)

I INTERLABORATORY COMPARISON PROGRAM RESULTS GROSS BETA ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysis or I Date Reported Known l Standard I Uncertainty PercentCoef (Normalized Radionuclide I Prepared Average I Value I Deviation EL I Analytics (3S) Iof Variation lDeviation Gross Beta 109/15/05 1 75.001 71.80 2.90 ( 0.80 ( 5.60 [ 0.77 GAMMA ISOTOPIC ANALYSIS OF AN AIR FILTER (pCi/filter)

Analysis or Date j Reported l Known Standard (Uncertainty j Percent Coef Normalized Radionuclide l Prepared Average l Value l Deviation EL I Analytics (3S)l of Variation Deviation Ce-141 09/15/05 161.80 163.00 5.42 1.82 4.69 -0.16 Co-58 09/15/05 46.30 44.50 4.79 0.49 12.39 0.31 Co-60 09/15/05 113.20 117.00 1.06 1.30 3.80 -0.88 Cr-51 09/15/05 260.80 237.00 6.53 2.63 8.14 1.12 Cs-134 09/15/05 80.00 85.70 3.86 0.95 6.27 -1.14 Cs-137 09/15/05 145.60 137.00 8.07 1.52 6.67 0.89 Fe-59 09/15/05 53.40 42.70 3.91 0.49 11.03 1.82 Mn-54 09/15/05 70.40 64.50 1.22 0.72 5.11 1.65 Zn-65 09/15/05 105.10 86.50 5.51 0.96 7.88 2.24 GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or 1Date Reported I Known 1Standard Uncertainty l Percent Coef l Normalized Radionuclide I Prepared Average _ Value Deviation EL Analytics (3S) of Variation Deviation Ce- 141 06/09/05 97.60 92.40 12.37 1.03 7.95 0.67 Co-58 06/09/05 NA NA NA NA NA NA Co-60 06/09/05 144.20 145.00 5.62 1.61 5.94 -0.09 Cr-51 06/09/05 286.60 303.00 28.38 3.37 15.87 -0.36 Cs-134 06/09/05 93.10 95.00 6.43 1.06 8.75 -0.24 Cs-137 06/09/05 194.30 189.00 6.24 2.10 5.60 0.49

TABLE 5-1 (SHEET 2 of 3)

INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF A MILK SAMPLE (pCi/liter)

Analysis or I Date Reported Known Standard J Uncertainty Percent Coef I Normalized Radionuclide I Prepared Average _ Value I Deviation EL Analytics (3S) of Variation I Deviation Fe-59 l 06/09/05 70.30 63.90 8.92 l 0.71 l 17.92 0.51 1-131 06/09/05 93.00 86.90 6.93 0.97 10.63 0.61 Mn-54 06/09/05 127.70 125.00 3.73 1.39 6.61 0.31 Zn-65 j 06/09/05 163.50 155.00 12.09 1.72 10.90 0.48 GROSS BETA ANALYSIS OF WATER SAMPLE (pCi/liter)

GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or I Date Reported Known Standard lUncertainty I Percent Coef TNormalized Radionuclide IPreared IAverage Value I Deviation EL Analytics (3S) of Variation Deviation Ce- 141 03/17/05 222.00 221.00 9.6 2.46 5.13 0.09 Co-58 03/17/05 115.40 111.00 7.4 1.24 9.21 0.41 Co-60 03/17/05 142.80 139.00 6.4 1.54 7.91 0.34 Cr-51i 03/17/05 370.30 322.00 46.1 3.57 14.70 0.89 Cs-134 03/17/05 138.60 134.00 6.1 1.49 5.46 0.61

TABLE 5-1 (SHEET 3 of 3)

I INTERLABORATORY COMPARISON PROGRAM RESULTS GAMMA ISOTOPIC ANALYSIS OF WATER SAMPLES (pCi/liter)

Analysis or I Date r Reported 1Known l Standard I Uncertainty [Percent Coef I Normalized Radionuclide I Prepared I Average j Value I Deviation EL IAnalytics (3S) Iof Variation I Deviation Cs-137 03/17/05 131.40 125.00 7.3 1.39 6.53 0.75 Fe-59 03/17/05 125.60 107.00 9.5 1.19 12.06 1.23 I-131 03/17/05 76.10 65.90 7.1 0.73 11.84 1.13 Mn-54 03/17/05 157.00 154.00 8 1.71 5.63 0.34 Zn-65 03/17/05 219.60 191.00 14.9 2.12 10.82 1.20 TRITIUM ANALYSIS OF WATER SAMPLES (pCi/liter)

6.0 CONCLUSION

S This report confirms the licensee's conformance with the requirements of Chapter 4 of the ODCM during 2005. It provides a summary and discussion of the results of the laboratory analyses for each type of sample.

All of the radiological levels were low and generally trending downward.

In 2005, there were two instances in which the indicator station readings were greater than the control station readings. These are discussed in the following paragraphs.

Cesium-137 was identified in vegetation in two of 24 samples at the indicator station and in none of the 12 samples at the control station. The average of the two positive samples from the indicator station was 49.5 pCi/kg-wet. The potential dose to a member of the public who would receive the highest dose (an adult) due to regular consumption of leafy vegetation containing Cs-137 at the concentration identified at the indicator station would be 0.17 mrem in one year.

This dose is less than 2% of the regulatory limit of 15 mrem per year to any organ due to gaseous effluents. As discussed in the vegetation section of the report, low levels of Cs-137 in vegetation samples is attributed primarily to fallout from nuclear weapons testing and from the Chernobyl incident.

Cobalt-60 was identified in river sediment at the indicator station in one of two samples but not at the control station. The activity found at the indicator station was 146 pCi/kg-dry and could be attributed to plant releases. The consequent total body dose to a member of the public expected to receive the highest dose was determined to be approximately 0.0067 mrem in one year or approximately 0.22%

of the ODCM limit.

No discernible radiological impact upon the environment or the public as a consequence of plant discharges to the atmosphere and to the river was established for any other REMP samples.

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NL-06-0963, Joseph M. Farley Nuclear Plant; Vogtle Electric Generating Plant; Annual Radiological Environmental Operating Reports for 2005

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6.0 CONCLUSION

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