ML071410228
| ML071410228 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 12/31/2006 |
| From: | Duke Energy Corp |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML071410228 (88) | |
Text
ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT DUKE ENERGY CORPORATION OCONEE NUCLEAR STATION Units 1, 2, and 3 2006
TABLE OF CONTENTS 1.0 Executive Summary . . . . . . . . . . . . 1-1 2.0 Introduction . . . . . . . . . . . . . 2-1 2.1 Site Description and Sample Locations . . . . . . . 2-1 2.2 Scope and Requirements of the REMP . . . . . . . 2-1 2.3 Statistical and Calculational Methodology . . . . . . . 2-2 2.3.1 Estimation of the Mean Value . . . . . . . . 2-2 2.3.2 Lower Level of Detection and Minimum Detectable Activity . . 2-3 2.3.3 Trend Identification . . . . . . . . . 2-3 3.0 Interpretation of Results . . . . . . . . . . . 3-1 3.1 Airborne Radioiodine and Particulates . . . . . . . 3-2 3.2 Drinking Water . . . . . . . . . . . . 3-5 3.3 Surface Water . . . . . . . . . . . . 3-7 3.4 Milk . . . . . . . . . . . . . . 3-10 3.5 Broadleaf Vegetation . . . . . . . . . . 3-12 3.6 Fish . . . . . . . . . . . . . . 3-14 3.7 Shoreline Sediment . . . . . . . . . . . 3-17 3.8 Direct Gamma Radiation . . . . . . . . . . 3-20 3.9 Land Use Census . . . . . . . . . . . 3-22 4.0 Evaluation of Dose . . . . . . . . . . . . 4-1 4.1 Dose from Environmental Measurements . . . . . . . 4-1 4.2 Estimated Dose from Releases . . . . . . . . . 4-1 4.3 Comparison of Doses . . . . . . . . . . 4-2 5.0 Quality Assurance . . . . . . . . . . . . 5-1 5.1 Sample Collection . . . . . . . . . . 5-1 5.2 Sample Analysis . . . . . . . . . . . 5-1 5.3 Dosimetry Analysis . . . . . . . . . . . 5-1 5.4 Laboratory Equipment Quality Assurance . . . . . . . 5-1 5.4.1 Daily Quality Control . . . . . . . . . 5-1 5.4.2 Calibration Verification . . . . . . . . . 5-1 5.4.3 Batch Processing . . . . . . . . . . 5-1 5.5 Duke Energy Intercomparison Program . . . . . . . 5-2 5.6 Duke Energy Audits . . . . . . . . . . . 5-2 5.7 U.S. Nuclear Regulatory Commission Inspections . . . . . 5-2 5.8 State of South Carolina Intercomparison Program . . . . . 5-2 5.9 TLD Intercomparison Program . . . . . . . . . 5-2 5.9.1 Nuclear Technology Services Intercomparison Program . . . 5-2 5.9.2 State of North Carolina Intercomparison Program . . . . 5-3 5.9.3 Internal Crosscheck (Duke Energy) . . . . . . . 5-3 6.0 References . . . . . . . . . . . . . 6-1 Appendices Appendix A: Environmental Sampling and Analysis Procedures . . . . A-1 I. Change of Sampling Procedures . . . . . . . . . A-2 i
II. Description of Analysis Procedures . . . . . . . . A-2 III. Change of Analysis Procedures . . . . . . . . . A-3 IV. Sampling and Analysis Procedures . . . . . . . . A-3 A.1 Airborne Particulate and Radioiodine . . . . . . A-3 A.2 Drinking Water . . . . . . . . . . A-3 A.3 Surface Water . . . . . . . . . . . A-4 A.4 Milk . . . . . . . . . . . . A-4 A.5 Broadleaf Vegetation . . . . . . . . . A-4 A.6 Fish . . . . . . . . . . . . A-4 A.7 Shoreline Sediment . . . . . . . . . . A-4 A.8 Direct Gamma Radiation (TLD) . . . . . . . A-5 A.9 Annual Land Use Census . . . . . . . . . A-5 V. Global Positioning System (GPS) Analysis . . . . . . . A-5 Appendix B: Radiological Env. Monitoring Program - Summary of Results . . . B-1 Air Particulate . . . . . . . . . . . . B-2 Air Radioiodine. . . . . . . . . . . . B-3 Drinking Water . . . . . . . . . . . . B-4 Surface Water . . . . . . . . . . . . B-5 Milk . . . . . . . . . . . . . . B-6 Broadleaf Vegetation . . . . . . . . . . B-7 Fish . . . . . . . . . . . . . . B-8 Shoreline Sediment . . . . . . . . . . . B-9 Direct Gamma Radiation (TLD) . . . . . . . . B-10 Appendix C: Sampling Deviations and Unavailable Analyses . . . . . C-1 C.1 Sampling Deviations . . . . . . . . . . C-2 C.2 Unavailable Analyses . . . . . . . . . . C-3 Appendix D: Analytical Deviations . . . . . . . . . . D-1 Appendix E: Radiological Environmental Monitoring Program Results . . . E-1 LIST OF FIGURES 2.1-1 Sampling Locations Map (One Mile Radius) . . . . . . 2-4 2.1-2 Sampling Locations Map (Ten Mile Radius) . . . . . . 2-5 3.1 Concentration of Gross Beta in Air Particulate . . . . . . 3-4 3.2 Concentration of Tritium in Drinking Water . . . . . . 3-5 3.3 Concentration of Tritium in Surface Water . . . . . . . 3-8 3.5 Concentration of Cs-137 in Broadleaf Vegetation . . . . . 3-12 3.6-1 Concentration of Cs-137 in Fish . . . . . . . . 3-15 3.6-2 Concentration of Cs-134 in Fish . . . . . . . . 3-15 3.7-1 Concentration of Cs-137 in Shoreline Sediment . . . . . . 3-18 3.7-2 Concentration of Co-60 in Shoreline Sediment . . . . . . 3-18 3.8 Direct Gamma Radiation (TLD) Results . . . . . . . 3-20 3.9 2006 Land Use Census Map . . . . . . . . . 3-23 LIST OF TABLES 2.1-A Radiological Monitoring Program Sampling Locations . . . . 2-6 2.1-B Radiological Monitoring Program Sampling Locations (TLD Sites) . . 2-7 2.2-A Reporting Levels for Radioactivity Concentrations in Environmental Samples . . . . . . . . . . 2-8 2.2-B REMP Analysis Frequency . . . . . . . . . 2-8 2.2-C Maximum Values for the Lower Limits of Detection . . . . . 2-9 3.1-A Mean Concentration of Air Radioiodine (I-131) . . . . . . 3-3 3.1-B Mean Concentration of Gross Beta in Air Particulate . . . . . 3-4 ii
3.2 Mean Concentrations of Radionuclides in Drinking Water . . . . 3-6 3.3 Mean Concentrations of Radionuclides in Surface Water . . . . 3-9 3.4 Mean Concentrations of Radionuclides in Milk . . . . . . 3-11 3.5 Mean Concentrations of Radionuclides in Vegetation . . . . . 3-13 3.6 Mean Concentrations of Radionuclides in Fish . . . . . . 3-16 3.7 Mean Concentrations of Radionuclides in Shoreline Sediment . . . 3-19 3.8 Direct Gamma Radiation (TLD) Results . . . . . . . 3-21 3.9 Oconee 2006 Land Use Census Results . . . . . . . 3-22 4.1-A 2006 Environmental and Effluent Dose Comparison . . . . . 4-3 4.1-B Maximum Individual Dose for 2006 based on Environmental Measurements for Oconee Nuclear Station . . . . . . . 4-6 5.0-A 2006 Cross-Check Results for EnRad Laboratories . . . . . 5-4 5.0-B 2006 Environmental Dosimeter Cross-Check Results . . . . . 5-10 LIST OF ACRONYMS USED IN THIS TEXT (in alphabetical order)
BW BiWeekly C Control DEHNR Department of Environmental Health and Natural Resources DHEC Department of Health and Environmental Control EPA Environmental Protection Agency GI-LLI Gastrointestinal - Lower Large Intestine GPS Global Positioning System LLD Lower Limit of Detection M Monthly MDA Minimum Detectable Activity mrem Millirem NIST National Institute of Standards and Technology NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual ONS Oconee Nuclear Station pCi/kg picocurie per kilogram pCi/l picocurie per liter pCi/m3 picocurie per cubic meter PIP Problem Investigation Process Q Quarterly REMP Radiological Environmental Monitoring Program SA Semiannually SLCs Selected Licensee Commitments SM Semimonthly TECH SPECs Technical Specifications TLD Thermoluminescent Dosimeter
µCi/ml microcurie per milliliter UFSAR Updated Final Safety Analysis Report W Weekly iii
1.0 EXECUTIVE
SUMMARY
This Annual Radiological Environmental Operating Report describes the Oconee Nuclear Station Radiological Environmental Monitoring Program (REMP), and the program results for the calendar year 2006.
Included are the identification of sampling locations, descriptions of environmental sampling and analysis procedures, comparisons of present environmental radioactivity levels and pre-operational environmental data, comparisons of doses calculated from environmental measurements and effluent data, analysis of trends in environmental radiological data as potentially affected by station operations, and a summary of environmental radiological sampling results. Quality assurance practices and program changes are also discussed.
Sampling activities were conducted as prescribed by Selected Licensee Commitments (SLCs). Required analyses were performed and detection capabilities were met for all collected samples as required by SLCs. Nine-hundred sixty-nine samples were analyzed comprising 1,346 test results in order to compile data for the 2006 report. Based on the annual land use census, the current number of sampling sites for Oconee Nuclear Station is sufficient.
Concentrations observed in the environment in 2006 for station related radionuclides were within the ranges of concentrations observed in the past. Inspection of data showed that radioactivity concentrations in surface water, shoreline sediment, and fish are higher than the activities reported for samples collected prior to the operation of the station. All positively identified measurements were within limits as specified in SLCs.
Additionally, environmental radiological monitoring data is consistent with effluents introduced into the environment by plant operations. The total body dose estimated to the maximum exposed member of the public as calculated by environmental sampling data, excluding TLD results, was 1.78E-01 mrem for 2006. It is therefore concluded that station operations has had no significant radiological impact on the health and safety of the public or the environment.
Air Sampling at Oconee Nuclear Station Section 1 - Page 1
2.0 INTRODUCTION
2.1 SITE DESCRIPTION AND SAMPLE LOCATIONS Oconee Nuclear Station (ONS) is located in Oconee County, South Carolina, approximately 8 miles northeast of Seneca, South Carolina, on the shore of Lake Keowee. This lake was formed by damming the Keowee and Little Rivers in that location. Immediately to the south is the U.S. Government Hartwell Project. The Keowee Hydroelectric Plant near the station joins Lake Keowee and the upper reaches of Lake Hartwell. To the north, the Jocassee Hydroelectric Plant joins Lake Jocassee and Lake Keowee. Jocassee is a pumped storage plant.
ONS consists of three pressurized water reactors. Each unit has an output of 866 megawatts net. Unit 1 began commercial operation 7/15/1973. Unit 2 began commercial operation 9/09/1974, and Unit 3 on 12/16/1974. An independent spent fuel storage installation is also located at the site.
Figures 2.1-1 and 2.1-2 are maps depicting the Thermoluminescent Dosimeter (TLD) monitoring locations and the sampling locations. The location numbers shown on these maps correspond to those listed in Tables 2.1-A and 2.1-B. Figure 2.1-1 comprises all sample locations within a one mile radius of ONS. Figure 2.1-2 comprises all sample locations within a ten mile radius of ONS.
2.2 SCOPE AND REQUIREMENTS OF THE REMP An environmental monitoring program has been in effect at Oconee Nuclear Station since 1969, four years prior to operation of Unit 1 in 1973. The preoperational program provides data on the existing environmental radioactivity levels for the site and vicinity which may be used to determine whether increases in environmental levels are attributable to the station.
The operational program provides surveillance and backup support of detailed effluent monitoring which is necessary to evaluate the significance, if any, of the contributions to the existing environmental radioactivity levels that result from station operation.
This monitoring program is based on NRC guidance as reflected in the Selected Licensee Commitments Manual, with regard to sample media, sampling locations, sampling frequency, and analytical sensitivity requirements. Indicator and control locations were established for comparison purposes to distinguish radioactivity of station origin from natural or other man-made environmental radioactivity. The environmental monitoring program also verifies projected and anticipated radionuclide concentrations in the environment and related exposures from releases of radionuclides from Oconee Nuclear Station. This program satisfies the requirements of Section IV.B.2 of Appendix I to 10CFR50 and 10CFR72.44(d)(2) and provides surveillance of all appropriate critical exposure pathways to man and protects vital interests of the company, public, and state and federal agencies concerned with the Section 2 - Page 1
environment. Reporting levels for radioactivity found in environmental samples are listed in Table 2.2-A. Table 2.2-B lists the REMP analysis and frequency schedule.
The Annual Land Use Census, required by Selected Licensee Commitments, is performed to ensure that changes in the use of areas at or beyond the site boundary are identified and that modifications to the Radiological Environmental Monitoring Program are made if required by changes in land use. This census satisfies the requirements of Section IV.B.3 of Appendix I to 10CFR50. Results are shown in Table 3.9.
Participation in an interlaboratory comparison program as required by Selected Licensee Commitments provides for independent checks on the precision and accuracy of measurements of radioactive material in REMP sample matrices. Such checks are performed as part of the quality assurance program for environmental monitoring in order to demonstrate that the results are valid for the purposes of Section IV.B.2 of Appendix I to 10CFR50. A summary of the results obtained as part of this comparison program are in Section 5 of this annual report.
2.3 STATISTICAL AND CALCULATIONAL METHODOLOGY 2.3.1 ESTIMATION OF THE MEAN VALUE There was one (1) basic statistical calculation performed on the raw data resulting from the environmental sample analysis program. The calculation involved the determination of the mean value for the indicator and the control samples for each sample medium. The mean is a widely used statistic. This value was used in the reduction of the data generated by the sampling and analysis of the various media in the Radiological Environmental Monitoring Program. The following equation was used to estimate the mean (reference 6.8):
N x
i =1 i
x =
N Where:
x = estimate of the mean, i = individual sample, N = total number of samples with a net activity (or concentration),
i = net activity (or concentration) for sample i.
NOTE: Net activity (or concentration)" is the activity (or concentration) determined to be present in the sample. No "Minimum Detectable Activity", "Lower Limit of Detection", "Less Than Level", or negative activities or concentrations are included in the calculation of the mean.
Section 2 - Page 2
2.3.2 LOWER LEVEL OF DETECTION AND MINIMUM DETECTABLE ACTIVITY The Lower Level of Detection (LLD) and Minimum Detectable Activity (MDA) are used throughout the Environmental Monitoring Program.
LLD - The LLD, as defined in the Selected Licensee Commitments Manual is the smallest concentration of radioactive material in a sample that will yield a net count, above the system background, that will be detected with 95% probability with only 5%
probability of falsely concluding that a blank observation represents a "real" signal.
The LLD is an a priori lower limit of detection. The actual LLD is dependent upon the standard deviation of the background counting rate, the counting efficiency, the sample size (mass or volume), the radiochemical yield, and the radioactive decay of the sample between sample collection and counting. The "required" LLD's for each sample medium and selected radionuclides are given in the Selected Licensee Commitments and are listed in Table 2.2-C.
MDA - The MDA may be thought of as an "actual" LLD for a particular sample measurement remembering that the MDA is calculated using a sample background instead of a system background.
2.3.3 TREND IDENTIFICATION One of the purposes of an environmental monitoring program is to determine if there is a buildup of radionuclides in the environment due to the operation of the nuclear station. Visual inspection of tabular or graphical presentations of data (including preoperational) is used to determine if a trend exists. A decrease in a particular radionuclide's concentration in an environmental medium does not indicate that reactor operations are removing radioactivity from the environment but that reactor operations are not adding that radionuclide to the environment in quantities exceeding the preoperational level and that the normal removal processes (radioactive decay, deposition, resuspension, etc.) are influencing the concentration.
Substantial increases or decreases in the amount of a particular radionuclide's release from the nuclear plant will greatly affect the resulting environmental levels; therefore, a knowledge of the release of a radionuclide from the nuclear plant is necessary to completely interpret the trends, or lack of trends, determined from the environmental data. Some factors that may affect environmental levels of radionuclides include prevailing weather conditions (periods of drought, solar cycles or heavier than normal precipitation), construction in or around either the nuclear plant or the sampling location, and addition or deletion of other sources of radioactive materials (such as the Chernobyl accident). Some of these factors may be obvious while others are sometimes unknown. Therefore, how trends are identified will include some judgment by plant personnel.
Section 2 - Page 3
Figure 2.1-1 Section 2 - Page 4
Figure 2.1-2 Section 2 - Page 5
TABLE 2.1-A OCONEE RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS Table 2.1-A Codes W Weekly SM Semimonthly BW BiWeekly Q Quarterly M Monthly SA Semiannually C Control Site Air Rad. & Surface Drinking Shoreline Fish Milk Broadleaf Location Description* Particulate Water Water Sediment Vegetation 060 Greenville Water Intake Road (2.58 mi NNE) W M 060 Greenville Water Intake Road (3.23 NE) M 060 C ** Greenville Water Intake Road (2.28 NE) SA 062 C Lake Keowee Hydro Intake (0.85 mi ENE) M Lake Hartwell Hwy 183 Bridge 063 (0.80 mi ESE) [000.7] SA SA 063.1 Lake Hartwell Hwy 183 (0.79 mi E) M 064 C Seneca (6.67 mi SSW) [004.1] M 066 Anderson (18.9 mi SSE) [012] M Lawrence Ramsey Bridge Hwy 27 067 (4.34 mi SSE) [005.2] SA SA 068 C High Falls County Park (1.82 mi W) SA 071 C Clemson Dairy (10.2 mi SSE) [006.3] SM 074 Keowee Key Resort (2.36 mi NNW) W 077 Skimmer Wall (1.00 mi SW) W M 078 Recreation Site (0.58 mi WSW) W 079 Keowee Dam (0.56 mi NE) W M 081 C Clemson Operations Center (9.33 mi SE) W M
- GPS data reflect approximate accuracy to within 2-5 meters. GPS field measurements were taken as close as possible to the item of interest.
- Control for Fish Only
[ ] Location Numbers prior to 1984 Section 2 - Page 6
TABLE 2.1-B OCONEE RADIOLOCICAL MONITORING PROGRAM SAMPLING LOCATIONS (TLD SITES)
Site Location* Distance Sector Site Location* Distance Sector MICROWAVE TOWER, SIX 020 SITE BOUNDARY 0.16 miles N 040 MILE 4.74 miles E 021 SITE BOUNDARY 0.25 miles NNE 041 JCT HWY 101 & 133 4.25 miles ESE LAWRENCE CHAPEL 022 SITE BOUNDARY 0.53 miles NE 042 CHURCH, HWY 133 4.93 miles SE HWY 291 AT 023 SITE BOUNDARY 0.93 miles ENE 043 ISSAQUEENA PARK 4.09 miles SSE HWY 130 AT LITTLE RIVER 024 SITE BOUNDARY 0.81 miles E 044 DAM 3.96 miles S TERMINUS OF HWY 588 025 SITE BOUNDARY 0.42 miles ESE 045 AT CROOKED CREEK 4.78 miles SSW HWY 188 AT 026 SITE BOUNDARY 0.34 miles SE 046 CROOKED CREEK 4.61 miles SW NEW HOPE CHURCH, HWY 027 SITE BOUNDARY 0.49 miles SSE 047 188 3.58 miles WSW 028 SITE BOUNDARY 0.46 miles S 048 JCT HWY 175 & 188 3.64 miles W 029 SITE BOUNDARY 0.56 miles SSW 049 JCT HWY 201 & 92 3.60 miles WNW STAMP CREEK LANDING, 030 SITE BOUNDARY 0.42 miles SW 050 END OF HWY 92 3.53 miles NW HWY 128, 1 MILE N OF 031 SITE BOUNDARY 0.27 miles WSW 051 HWY 130 4.64 miles NNW DPC BRANCH OFFICE SITE 076 SITE BOUNDARY 0.19 miles W 052 - PICKENS 12.4 miles ENE DPC BRANCH OFFICE SITE 032 SITE BOUNDARY 0.19 miles WNW 053 - LIBERTY 11.7 miles E POST OFFICE - HWY 93 033 SITE BOUNDARY 0.21 miles WNW 054 NORRIS 8.60 miles ESE CLEMSON 034 SITE BOUNDARY 0.22 miles NW 055 METEOROLOGY PLOT 9.27 miles SSE 035 SITE BOUNDARY 0.17 miles NNW 056 WATER TOWER - SENECA 7.30 miles SSW OCONEE MEMORIAL 036 MILE CREEK LANDING 4.32 miles N 057 HOSPITAL 8.42 miles SW KEOWEE CHURCH, BRANCH RD SUBSTATION, 037 HWY 327 4.85 miles NNE 058 C WALHALLA 9.39 miles WSW CONVENIENCE MART, 038 JCT HWY 183 & 133 4.24 miles NE 059 TAMASSEE DAR SCHOOL 9.20 miles NW HWY 133, 1 MILE EAST CLEMSON 039 OF JCT HWY 183 & 133 4.02 miles ENE 081 C OPERATIONS CENTER 9.33 miles SE C = Control
- GPS data reflect approximate accuracy to within 2-5 meters. GPS field measurements were taken as close as possible to the item of interest.
Section 2 - Page 7
TABLE 2.2-A REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Air Particulates Fish Milk Broadleaf (pCi/liter) or Gases (pCi/kg-wet) (pCi/liter) Vegetation (pCi/m3) (pCi/kg-wet)
(a)
H-3 20,000 Mn-54 1,000 30,000 Fe-59 400 10,000 Co-58 1,000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-Nb-95 400 I-131 2(b) 0.9 3 100 Cs-134 30 10 1,000 60 1,000 Cs-137 50 20 2,000 70 2,000 Ba-La-140 200 300 (a) For drinking water samples only. This is 40CFR Part 141 value.
(b) If low-level I-131 analyses are performed.
TABLE 2.2-B REMP ANALYSIS FREQUENCY Sample Analysis Gamma Tritium Low Level Gross TLD Medium Schedule Isotopic I-131 Beta Air Radioiodine Weekly X Air Particulate Weekly X X Direct Radiation Quarterly X Surface Monthly X Water Quarterly Composite X Drinking Monthly X (a) X Water Quarterly Composite X Shoreline Sediment Semiannually X Milk Semimonthly X X Fish Semiannually X Broadleaf Vegetation Monthly X (a) Low level I-131 analysis will be performed if abnormal releases occur which could reasonably result in > 1 pCi/liter of I-131 in drinking water. An LLD of 1 pCi/liter will be required for this analysis.
Section 2 - Page 8
TABLE 2.2-C MAXIMUM VALUES FOR THE LOWER LIMITS OF DETECTION Analysis Water Air Fish Milk Broadleaf Sediment (pCi/liter) Particulates (pCi/kg-wet) (pCi/liter) Vegetation (pCi/kg-dry) or Gases (pCi/kg-wet)
(pCi/m3)
Gross Beta 4 0.01 H-3 2000 Mn-54 15 130 Fe-59 30 260 Co-58, 60 15 130 Zn-65 30 260 Zr-95 15 Nb-95 15 I-131 15(a) 0.07 1 60 Cs-134 15 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-La-140 15 15 (a) LLD for low-level I-131 analyses is 1 pCi/liter if performed Section 2 - Page 9
3.0 INTERPRETATION OF RESULTS Review of 2006 REMP analysis results was performed to identify changes in environmental levels as a result of station operations. The review is summarized in this section. Data from 2006 was compared to preoperational and historical data. Sample data for some media is not directly comparable to preoperational and earlier operational sample results because of either significant changes in the analysis methods or changes in the reporting of the results.
Evaluation for significant trends was performed for the radionuclides that have required LLDs listed in Selected Licensee Commitment 16.11.6. These radionuclides are collectively referred to as "Selected Licensee Commitments radionuclides" and include H-3, Mn-54, Fe-59, Co-58, Co-60, Zn-65, Zr-95, Nb-95, I-131, Cs-134, Cs-137, Ba-140, and La-140. Drinking water gross beta results are routinely trended. Trending of air particulate gross beta results was initiated in 1996 when the analysis was resumed. Trending is also performed for other radionuclides that are detected and could have been the result of station effluents. Only Selected Licensee Commitment radionuclides were detected in 2006.
Trending was performed by comparing annual mean concentrations of any effluent related detected radionuclide to historical results. Factors evaluated include the frequency of detection and the concentration in terms of the percent of the radionuclide's SLC reporting level (Table 2.2-A). All maximum percent of reporting level values were well below the 100% action level.
The highest value reached during 2006 was 4.82% for Cs-137 in a fish sample collected at Location 063.
Changes in sample location, analytical technique, and presentation of results must be considered when reviewing for trends. Calculation of the annual mean concentrations has been performed differently over the history of the REMP. During 1979-1986, all net results (sample minus background), positive and negative, were included in the calculation of the mean. Only positive net activity results were used to calculate the mean for the other years. A change in gamma spectroscopy analysis systems in 1987 ended a period when many measurements yielded detectable low-level activity for both indicator and control location samples. It is thought that the method the previous system used to estimate net activity may have been vulnerable to false-positive results.
Data presented in Sections 3.1 - 3.8 support the conclusion that there were no significant increases in radionuclides in the environment around ONS due to station operations in 2006.
Similarly, there was no significant increase in ambient background radiation levels in the surrounding areas.
Section 3 - Page 1
3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2006, 312 radioiodine and particulate samples were analyzed, 260 from five indicator locations and 52 from the control location. Particulate samples were analyzed weekly for gamma and gross beta. Radioiodine samples received a weekly gamma analysis.
There was no detectable I-131 in air samples in 2006. Table 3.1-A gives the highest indicator location annual mean and control location annual mean for I-131 since the preoperational period.
The table shows similar concentrations for both the indicator and control locations and the activities decreasing from early in the operational history of the plant. No I-131 has been detected since 1994.
Cs-137 was not detected in air radioiodine samples in 2006. Cs-137 has been detected in cartridges in previous years. A study performed in 1990 determined Cs-137 to be an active constituent of the charcoal. A similar study was performed in 2001 again yielding this conclusion.
There were no detectable gamma emitting radionuclides detected in air particulate samples in 2006. No gamma emitting particulates have been detected in indicator location samples since the change in gamma spectroscopy analysis systems in 1987.
Beta analysis of particulate filters was initiated in March of 1996 and became required by Selected Licensee Commitments in 1998. Gross beta analysis was performed on particulate filters during the preoperational and early operational history of the plant but had not been required since 1984. Figure 3.1 summarizes gross beta results for the indicator location with the highest annual mean and the control location samples. Both the indicator and control location results are similar in concentration and are near the lower range of preoperational gross beta results.
K-40 and Be-7 are the naturally occurring radionuclides that were observed in air samples.
Section 3 - Page 2
Table 3.1-A Mean Concentration of Air Radioiodine (I-131)
Year Indicator Location (pCi/m3) Control Location (pCi/m3)
Preoperational 1969-1972 0.00E0 0.00E0 Feb. 1973 - June 1973 0.00E0 0.00E0 July 1973 - Dec. 1973 0.00E0 0.00E0 Jan. 1974 - June 1974 0.00E0 0.00E0 July 1974 - Dec. 1974 2.60E-2 8.00E-3 Jan. 1975 - June 1975 8.65E-2 3.12E-2 July 1975 - Dec. 1975 1.13E-2 9.52E-3 1976 2.76E-2 2.18E-2 1977 3.60E-2 3.60E-2 1978 2.19E-1 1.15E-1 1979 7.54E-3 4.75E-4 1980 3.07E-3 9.67E-4 1981 6.31E-3 5.39E-4 1982 2.87E-3 8.10E-4 1983 1.48E-3 3.05E-4 1984 8.11E-4 -2.30E-5 1985 7.71E-4 4.54E-4 1986 5.02E-3 7.86E-3 1987 4.29E-3 5.19E-3 1988 0.00E0 0.00E0 1989 4.99E-4 0.00E0 1990 0.00E0 0.00E0 1991 0.00E0 0.00E0 1992 0.00E0 0.00E0 1993 0.00E0 0.00E0 1994 1.03E-2 0.00E0 1995 0.00E0 0.00E0 1996 0.00E0 0.00E0 1997 0.00E0 0.00E0 1998 0.00E0 0.00E0 1999 0.00E0 0.00E0 2000 0.00E0 0.00E0 2001 0.00E0 0.00E0 2002 0.00E0 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 0.00E0 2005 0.00E0 0.00E0 2006 0.00E0 0.00E0 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results Section 3 - Page 3
Figure 3.1 pCi/m3 Concentration of Gross Beta in Air Particulate 4.50E-02 4.00E-02 3.50E-02 3.00E-02 2.50E-02 2.00E-02 1.50E-02 1.00E-02 5.00E-03 0.00E+00 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Pre-operational sample results ranged from 0.04 to 1.46 pCi/m3 Control Location Indicator Location There is no reporting level for gross beta in air particulate Table 3.1-B Mean Concentration of Gross Beta in Air Particulate Monitoring Period Indicator Location (pCi/m3) Control Location (pCi/m3) 1996 3.87E-2 3.69E-2 1997 2.87E-2 2.92E-2 1998 2.47E-2 1.56E-2 1999 2.85E-2 2.23E-2 2000 2.38E-2 1.85E-2 2001 2.05E-2 1.94E-2 2002 2.01E-2 1.84E-2 2003 1.86E-2 1.82E-2 2004 1.92E-2 1.90E-2 2005 1.95E-2 1.91E-2 Average (1996 - 2005) 2.42E-2 2.17E-2 2006 2.09E-2 2.00E-2 Section 3 - Page 4
3.2 DRINKING WATER Gross beta analysis and gamma spectroscopy were performed on 39 monthly drinking water samples. These samples were composited to form 12 quarterly period samples for Tritium analysis. Two indicator locations and a control location were sampled; however, only one of the indicator locations is downstream of the effluent release point.
Table 3.2 lists the highest indicator location annual mean and control location annual mean for gross beta results since the preoperational period. The indicator location had an average concentration of 1.54 pCi/liter in 2006, and the control location had a concentration of 1.75 pCi/liter. The 2005 indicator mean was 1.28 pCi/liter. The table shows that 2006 gross beta levels in drinking water are slightly lower than preopreational concentrations. The dose for consumption of water was less than one mrem per year, historically and for 2006; therefore low-level iodine analysis is not required.
Tritium was detected in three of the twelve composite samples during 2006. The 2006 mean indicator location 066 concentration was 340 pCi/liter, which is 1.70% of the reporting level.
Table 3.2 and Figure 3.2 show the highest indicator and control location annual means for Tritium since analysis was initiated early in the operational period. Tritium concentrations have decreased at both the indicator and control locations. The closure of the Clemson water plant in 1989 is one reason for the decrease shown in the table and graph. The Clemson site was typically the high mean location when the plant was in operation.
There were no gamma emitting radionuclides identified in drinking water samples in 2006.
Gamma spectroscopy analysis has not detected any activity in the water supplies since 1988.
K-40 is the naturally occurring radionuclide that was observed in drinking water samples.
Figure 3.2 Current reporting level implemented 1984 pCi/liter Concentration of Tritium in Drinking Water 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0
1974 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 Control Location Indicator Location 20 % Reporting Level Section 3 - Page 5
Table 3.2 Mean Concentrations of Radionuclides in Drinking Water Gross Beta (pCi/l) Tritium (pCi/l)
Year Indicator Control Indicator Control Location Location Location Location Preoperational ending Jan. 1971 3.03 5.90 Analysis not required Preoperational ending Jan. 1973 3.58 4.94 Analysis not required Feb. 1973 - June 1973 Qualitative results reported Analysis not required June 1973 - Dec. 1973 7.15 21.78 Analysis not required Jan. 1974 - June 1974 3.13 6.98 Analysis not required July 1974 - Dec. 1974 2.24 2.02 525 330 Jan. 1975 - June 1975 1.98 1.59 600 300 July 1975 - Dec. 1975 2.01 1.22 2990 505 1976 2.38 2.00 2196 224 1977 2.70 2.30 1200 290 1978 2.56 2.17 1050 333 1979 1.83 1.36 576 235 1980 1.86 1.63 660 200 1981 1.98 1.88 830 127 1982 2.04 1.45 643 153 1983 1.85 1.54 937 220 1984 1.87 1.08 765 145 1985 2.14 1.16 856 210 1986 1.91 1.04 1240 503 1987 2.00 1.20 815 680 1988 2.00 1.40 1570 0.00 1989 2.30 1.80 1350 559 1990 3.00 2.70 0.00 0.00 1991 1.80 1.40 558 0.00 1992 3.20 1.60 0.00 0.00 1993 2.10 1.90 0.00 0.00 1994 1.90 2.10 0.00 0.00 1995 5.10 2.90 248 0.00 1996 2.07 1.77 214 0.00 1997 2.52 2.23 194 0.00 1998 2.48 1.70 0.00 0.00 1999 1.73 1.49 185 0.00 2000 2.07 1.68 251 0.00 2001 1.75 1.29 390 0.00 2002 1.61 1.21 338 0.00 2003 1.51 1.05 266 0.00 2004 1.58 1.25 225 0.00 2005 1.28 1.37 377 0.00 2006 1.54 1.75 340 0.00 0.00 = no detectable measurements 1989 - Clemson water plant closes; nearest downstream plant is Anderson.
1979 - 1986 mean based on all net activity results Section 3 - Page 6
3.3 SURFACE WATER Gamma spectroscopy was performed on 26 monthly surface water samples. These samples were composited to form eight quarterly samples for Tritium analysis. One indicator and one control location were sampled. The indicator location is near the liquid effluent release point.
Tritium was detected in the four indicator location samples. The 2006 average concentration was 6,718 pCi/liter. The individual samples ranged from 2,620 pCi/liter to 13,600 pCi/liter. The 2005 mean concentration was 5,153 pCi/liter. Tritium was not detected in any control surface water samples.
Figure 3.3 shows the indicator and control annual means for Tritium since the preoperational period. Table 3.3 lists the indicator annual means. Tritium in the indicator location was elevated during an extended drought from 1998 through 2002.
The average tritium concentration decreased in 2003 with increased rainfall.
Gamma spectroscopy analysis did not detect any station related activity during 2006. In 1999, gamma spectroscopy analysis detected Co-58 in one indicator sample at 27.3 pCi/liter.
Gamma spectroscopy analysis has not detected any other activity in surface water samples since 1992. Table 3.3 summarizes the indicator annual means of radionuclides detected since the change in the gamma spectroscopy analysis system in 1987. Visual inspection of the gamma spectroscopy tabular data covering the early operational period through 2006 did not reveal any increasing trends.
K-40 is the naturally occurring radionuclide observed in surface water samples in 2006.
Section 3 - Page 7
Figure 3.3 pCi/liter Concentration of Tritium in Surface Water 60000 50000 40000 30000 20000 10000 0
1969 1972 1975 1977 1980 1983 1986 1989 1992 1995 1998 2001 2004 Control Location Indicator Location There is no reporting level for Tritium in surface water Section 3 - Page 8
Table 3.3 Mean Concentrations of Radionuclides in Surface Water Year Co-58 (pCi/l) Co-60 (pCi/l) Nb-95 (pCi/l) Cs-137 (pCi/l) H-3 pCi/l)
Preoperational 1969 Qualitative results reported 4.86E2 Preoperational 1970 5.94E2 Preoperational 1971 4.01E2 Preoperational 1972 3.62E2 1973 0.00E0 1974 0.00E0 1.32E1 0.00E0 1.60E1 1.99E3 Jan. 1975 - June 1975 0.00E0 0.00E0 0.00E0 0.00E0 1.56E4 July 1975 - Dec. 1975 0.00E0 1.34E1 0.00E0 0.00E0 5.52E4 1976 1.08E2 3.30E1 0.00E0 3.50E1 2.95E4 1977 2.60E1 1.80E1 0.00E0 3.10E1 2.90E3 1978 2.96E2 0.00E0 0.00E0 2.22E1 8.00E2 1979 1.33E0 2.60E0 1.78E0 2.82E0 4.37E3 1980 1.56E0 2.30E0 1.22E0 5.40E0 4.93E3 1981 1.10E0 6.10E-1 1.70E0 3.90E0 7.21E3 1982 6.14E-1 1.99E0 2.29E0 4.85E0 6.13E3 1983 6.99E-1 3.02E0 3.91E-1 6.83E-1 8.40E3 1984 9.40E-1 6.30E-1 7.90E-1 4.83E-1 9.90E3 1985 2.15E-1 6.27E-1 4.95E-1 9.90E-1 1.05E4 1986 3.28E0 1.23E0 1.14E0 3.07E-1 1.26E4 1987 5.10E1 3.40E0 4.00E0 0.00E0 7.08E3 1988 6.20E0 5.00E0 2.50E0 3.50E0 1.10E4 1989 5.30E0 3.00E0 0.00E0 3.40E0 1.02E4 1990 1.70E0 1.60E0 0.00E0 0.00E0 1.03E4 1991 5.40E0 0.00E0 0.00E0 0.00E0 5.76E3 1992 2.50E0 0.00E0 0.00E0 0.00E0 6.22E3 1993 0.00E0 0.00E0 0.00E0 0.00E0 8.62E3 1994 0.00E0 0.00E0 0.00E0 0.00E0 5.75E3 1995 0.00E0 0.00E0 0.00E0 0.00E0 6.65E3 1996 0.00E0 0.00E0 0.00E0 0.00E0 4.54E3 1997 0.00E0 0.00E0 0.00E0 0.00E0 5.50E3 1998 0.00E0 0.00E0 0.00E0 0.00E0 3.35E3 1999 2.73E1 0.00E0 0.00E0 0.00E0 1.13E4 2000 0.00E0 0.00E0 0.00E0 0.00E0 1.48E4 2001 0.00E0 0.00E0 0.00E0 0.00E0 7.43E3 2002 0.00E0 0.00E0 0.00E0 0.00E0 1.00E4 2003 0.00E0 0.00E0 0.00E0 0.00E0 4.77E3 2004 0.00E0 0.00E0 0.00E0 0.00E0 3.86E3 2005 0.00E0 0.00E0 0.00E0 0.00E0 5.15E3 2006 0.00E0 0.00E0 0.00E0 0.00E0 6.72E3 0.00E0 = no detectable measurements 1979-1986 mean based on all net activity results Section 3 - Page 9
3.4 MILK Gamma spectroscopy and low level iodine analysis was performed on 26 milk samples collected in 2006. One control location was sampled. No indicator dairies were identified by the 2006 land use census.
There were no gamma emitting radionuclides identified in milk samples in 2006. Cs-137 is the only radionuclide, other than naturally occurring, reported in milk samples since 1988.
Cs-137 in milk is not unusual. It is a constituent of nuclear weapons test fallout and has been observed in samples from indicator and control locations in previous years.
Table 3.4 lists the highest indicator location annual mean and control location annual mean for Cs-137 since the preoperational period. The table shows similar concentrations for both indicator and control locations.
K-40 is a naturally occurring radionuclide observed in milk samples in 2006.
Section 3 - Page 10
Table 3.4 Mean Concentration of Radionuclides in Milk Year Cs-137 Indicator (pCi/l) Cs-137 Control (pCi/l)
Preoperational 1.57E1 1.46E1 Feb. 1973 - June 1973 Qualitative results reported Qualitative results reported July 1973 - Dec. 1973 5.80E0 Jan. 1974 - June 1974 5.30E0 0.00E0 July 1974 - Dec. 1974 1.11E1 0.00E0 Jan. 1975 - June 1975 1.51E1 9.45E0 July 1975 - Dec. 1975 0.00E0 0.00E0 1976 1.80E1 7.47E0 1977 0.00E0 0.00E0 1978 1.33E1 1.33E1 1979 7.25E0 2.52E0 1980 3.58E0 2.63E0 1981 5.52E0 5.51E0 1982 2.71E0 3.25E0 1983 5.04E0 -4.27E-1 1984 2.30E0 2.58E0 1985 2.38E0 1.31E0 1986 2.92E0 2.97E0 1987 4.90E0 4.90E0 1988 3.90E0 3.20E0 1989 4.70E0 2.90E0 1990 6.40E0 0.00E0 1991 5.00E0 0.00E0 1992 6.60E0 0.00E0 1993 0.00E0 0.00E0 1994 0.00E0 1.80E0 1995 2.30E0 2.00E0 1996 0.00E0 4.10E0 1997 0.00E0 0.00E0 1998 0.00E0 0.00E0 1999 0.00E0 0.00E0 2000 0.00E0 0.00E0 2001 0.00E0 0.00E0 2002 0.00E0 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 0.00E0 2005 0.00E0 0.00E0 2006 0.00E0 0.00E0 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results Section 3 - Page 11
3.5 BROADLEAF VEGETATION Gamma spectroscopy was performed on 48 broadleaf vegetation samples during 2006. Three indicator locations and one control location were sampled. Cs-137 was reported in one indicator sample at a concentration of 17.7 pCi/kg. Table 3.5 shows control location samples have historically contained measurable concentrations of Cs-137 but none was reported in 2006.
Cs-137 is the only radionuclide, other than naturally occurring, reported in indicator location vegetation samples since the change in gamma spectroscopy analysis systems in 1987.
It is not unusual for Cs-137 to be present in vegetation. It is a constituent of nuclear weapons test fallout and has been observed in samples from indicator and control locations in previous years. Table 3.5 lists the highest indicator location annual mean and control location annual mean for Cs-137 since early in the stations operational history. Visual inspection of the tabular data did not reveal any increasing trends.
K-40 and Be-7 are naturally occurring radionuclides that were observed in broadleaf vegetation samples in 2006.
Figure 3.5 pCi/kg Concentration of Cs-137 in Broadleaf Vegetation 2500 2000 1500 1000 500 0
1974 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 Indicator Location Control Location Reporting Level Section 3 - Page 12
Table 3.5 Mean Concentration of Radionuclides in Vegetation Year Cs-137 Indicator (pCi/kg) Cs-137 Control (pCi/kg)
July 1974 - Dec. 1974 1.54E3 0.00E0 Jan. 1975 - June 1975 1.55E3 1.59E3 July 1975 - Dec. 1975 0.00E0 0.00E0 1976 0.00E0 0.00E0 1977 0.00E0 7.90E2 1978 1.19E2 8.19E1 1979 5.04E1 2.96E1 1980 2.80E1 1.55E1 1981 2.99E1 2.60E1 1982 2.42E1 2.62E1 1983 7.44E0 5.35E-1 1984 1.37E1 4.74E2 1985 1.62E1 2.20E2 1986 3.28E1 3.12E2 1987 2.70E1 4.20E1 1988 2.40E1 7.50E1 1989 0.00E0 1.08E2 1990 2.73E2 1.74E2 1991 2.20E1 1.45E2 1992 0.00E0 1.46E2 1993 0.00E0 1.49E2 1994 0.00E0 1.06E2 1995 4.30E1 1.58E2 1996 3.79E1 1.83E2 1997 4.73E1 1.35E2 1998 7.28E1 1.61E2 1999 1.34E2 0.00E0 2000 1.06E2 0.00E0 2001 3.19E1 0.00E0 2002 8.44E1 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 5.96E1 2005 4.51E1 4.11E1 2006 1.77E1 0.00E0 0.00E0 = no detectable measurements Only qualitative results reported prior to 1974 Control location changed to 073 in 1984 Control location 081 added in 1998 Control location 073 was removed in 1999 1979 - 1986 mean based on all net activity results Section 3 - Page 13
3.6 FISH In 2006, gamma spectroscopy was performed on 12 fish samples. Two downstream indicator and one control location were sampled. Cs-137 was identified in all eight of the indicator location samples. Cs-137 was detected in one of the four control location samples at a concentration of 17.2 pCi/kg.
The highest average concentration for Cs-137 was 55.8 pCi/kg (2.79% of reporting level).
The highest individual sample concentration for Cs-137 was 96.3 pCi/kg (4.82% of reporting level).
Figures 3.6-1 and 3.6-2 are graphs displaying the annual means for Cs-137 and Cs-134.
Historically, both are contributors to the calculated dose from liquid effluents from ingestion of fish. Radioactivity concentrations in downstream fish samples are higher than those reported in preoperational fish samples, however, concentrations in fish have decreased over time with decreases in radioactive material releases from the plant.
One factor affecting the trend analysis is a change in sampling locations. In 1984, a second downstream fish location was added. Location 063 is closer to the liquid effluent discharge point and has been the highest mean indicator since it was added.
K-40 was observed in fish samples in addition to the radionuclides discussed above.
Table 3.6 lists the highest indicator location annual means since the preoperational period for radionuclides detected in 2006. Also included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987.
Comparison of data to previous years does not indicate any increases in concentrations.
Section 3 - Page 14
Figure 3.6-1 pCi/kg Concentration of Cs-137 in Fish 2500 2000 1500 1000 500 0
1970 1974 1976 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005 Control Location Indicator Location Reporting Level Figure 3.6-2 pCi/kg Concentration of Cs-134 in Fish 700 600 500 400 300 200 100 0
1970 1974 1976 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005 Control Location Indicator Location 50 % Reporting Level Current reporting levels implemented 1984 Section 3 - Page 15
Table 3.6 Mean Concentrations of Radionuclides in Fish Year Co-58 (pCi/kg) Co-60 (pCi/kg) Cs-134 (pCi/kg) Cs-137 (pCi/kg)
Preop ending Jan.1971 0.00E0 0.00E0 0.00E0 1.46E2 Preop ending Jan.1973 0.00E0 0.00E0 0.00E0 1.66E2 Feb. 1973 - June 1973 Qualitative results reported-no significant measurements above background July 1973 - Dec. 1973 0.00E0 0.00E0 0.00E0 1.89E2 Jan. 1974 - June 1974 0.00E0 0.00E0 0.00E0 2.47E1 July 1974 - Dec. 1974 0.00E0 0.00E0 0.00E0 4.85E1 Jan. 1975 - June 1975 0.00E0 0.00E0 3.81E1 1.05E2 July 1975 - Dec. 1975 8.50E1 0.00E0 7.00E1 3.13E2 1976 5.70E1 1.14E2 7.73E1 1.66E2 1977 0.00E0 0.00E0 1.80E2 3.60E2 1978 3.27E2 0.00E0 3.31E2 0.00E0 1979 1.91E0 1.56E1 9.26E1 3.88E2 1980 1.45E1 1.90E1 1.10E2 3.99E2 1981 2.25E1 1.49E1 1.40E2 4.51E2 1982 9.83E-1 8.03E0 1.17E2 2.94E2 1983 3.35E1 4.53E0 1.24E2 3.32E2 1984 1.21E2 6.23E1 3.87E2 1.04E3 1985 1.62E1 1.10E1 7.93E1 2.85E2 1986 9.56E1 2.59E1 2.57E2 7.36E2 1987 1.63E2 6.30E1 9.80E1 3.93E2 1988 9.60E1 0.00E0 7.20E1 2.60E2 1989 4.30E1 1.50E1 8.60E1 3.36E2 1990 1.50E1 0.00E0 4.80E1 1.19E2 1991 4.59E1 0.00E0 1.25E2 1.94E2 1992 6.10E1 0.00E0 4.80E1 1.36E2 1993 0.00E0 0.00E0 2.10E1 1.10E2 1994 0.00E0 0.00E0 2.80E1 1.05E2 1995 0.00E0 0.00E0 3.10E1 9.20E1 1996 0.00E0 0.00E0 4.49E1 1.25E2 1997 0.00E0 0.00E0 0.00E0 1.18E2 1998 0.00E0 0.00E0 0.00E0 5.79E1 1999 0.00E0 0.00E0 0.00E0 1.04E2 2000 0.00E0 0.00E0 0.00E0 7.54E1 2001 1.72E1 0.00E0 0.00E0 9.92E1 2002 0.00E0 0.00E0 0.00E0 9.37E1 2003 5.02E1 0.00E0 0.00E0 6.04E1 2004 0.00E0 0.00E0 0.00E0 5.29E1 2005 0.00E0 0.00E0 0.00E0 5.14E1 2006 0.00E0 0.00E0 0.00E0 5.58E1 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results Section 3 - Page 16
3.7 SHORELINE SEDIMENT Gamma spectroscopy was performed on six sediment samples. Two downstream indicator locations and one control location were sampled. Four samples were taken from indicator locations and two from the control location.
Cs-137 was identified in all four indicator location samples. Cs-137 was not observed in any control location samples. The highest 2006 indicator location annual mean was 50.1 pCi/kg.
Table 3.7 lists the highest indicator location annual means since shoreline sediment was initiated in 1984. Included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987.
Visual inspection of the tabular data did not reveal any trends. Figure 3.7-1 is a graph of the Cs-137 annual means. Figure 3.7-2 is a graph of the Co-60 annual means. Historically, both are contributors to the calculated dose from liquid effluents from shoreline sediment. No trends are apparent.
K-40 and Be-7 are naturally occurring radionuclides observed in shoreline sediment samples in 2006.
Section 3 - Page 17
Figure 3.7-1 pCi/kg Concentration of Cs-137 in Shoreline Sediment 1000 900 800 700 600 500 400 300 200 100 0
1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 Control Location 068 Indicator Location 063 Indicator Location 067 Figure 3.7-2 pCi/kg Concentration of Co-60 in Shoreline Sediment 600 500 400 300 200 100 0
1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 Control Location 068 Indicator Location 063 Indicator Location 067 There are no reporting levels for shoreline sediment Section 3 - Page 18
Table 3.7 Mean Concentrations of Radionuclides in Shoreline Sediment (pCi/kg)
Year Mn-54 Co-58 Co-60 Zn-65 Cs-134 Cs-137 Ag-110m Sb-125 1984 1.10E1 1.09E1 1.19E1 0.00E0 7.77E1 5.16E1 0.00E0 0.00E0 1985 9.39E0 1.27E0 4.79E0 0.00E0 7.63E1 9.47E1 0.00E0 0.00E0 1986 2.24E1 1.62E1 2.50E1 0.00E0 1.41E2 7.12E2 0.00E0 0.00E0 1987 5.40E1 4.70E2 5.07E2 0.00E0 1.01E2 6.22E2 3.46E2 0.00E0 1988 3.30E1 1.20E2 1.87E2 6.70E1 6.60E1 7.59E2 1.62E2 3.67E2 1989 2.30E1 1.24E2 1.96E2 0.00E0 5.40E1 8.48E2 5.50E1 1.86E2 1990 3.40E1 8.00E1 2.59E2 0.00E0 4.50E1 5.36E2 1.71E2 9.00E1 1991 3.26E1 5.60E1 8.57E1 0.00E0 6.91E1 1.24E2 1.10E2 1.78E2 1992 8.79E1 1.79E2 1.12E2 0.00E0 5.60E1 3.31E2 1.69E2 2.08E2 1993 8.20E1 8.20E1 6.50E1 0.00E0 3.20E1 1.36E2 5.63E1 1.11E2 1994 5.30E1 7.00E1 1.49E2 0.00E0 6.70E1 2.38E2 1.04E2 1.29E2 1995 1.43E2 3.90E1 2.40E1 0.00E0 1.10E1 5.20E1 0.00E0 0.00E0 1996 0.00E0 5.10E1 0.00E0 0.00E0 1.98E1 1.19E2 0.00E0 0.00E0 1997 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.06E2 0.00E0 0.00E0 1998 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.01E2 0.00E0 0.00E0 1999 6.96E1 0.00E0 0.00E0 0.00E0 0.00E0 7.38E1 0.00E0 0.00E0 2000 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 8.54E1 0.00E0 0.00E0 2001 0.00E0 2.10E1 0.00E0 0.00E0 0.00E0 1.20E2 0.00E0 0.00E0 2002 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 6.96E1 0.00E0 0.00E0 2003 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.93E2 0.00E0 0.00E0 2004 8.54E1 0.00E0 0.00E0 0.00E0 0.00E0 9.56E1 0.00E0 0.00E0 2005 2.00E2 0.00E0 0.00E0 0.00E0 0.00E0 6.53E1 0.00E0 0.00E0 2006 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 5.01E1 0.00E0 0.00E0 0.00E0 = no detectable measurements 1984-1986 mean based on all net activity results Section 3 - Page 19
3.8 DIRECT GAMMA RADIATION In 2006, 168 Thermoluminescent Dosimeters (TLD) were analyzed, 160 at indicator locations, 8 at the two control locations. TLDs are collected and analyzed quarterly. The highest annual mean exposure for an indicator location was 110 milliroentgen. This TLD is located at indicator location 036, 4.32 miles from the station. The annual mean exposure for the control locations was 109 milliroentgen.
Figure 3.8 and Table 3.8 show TLD inner ring (site boundary), outer ring (4-5 miles), and control location annual averages in milliroentgen per year. Data is provided from 1984 when TLD locations were added and arranged in an inner ring and outer ring configuration.
Preoperational data is also provided in the table. As shown in the graph, inner and outer ring averages historically compare closely, with control data somewhat higher. Inner and outer ring averages comprise a number of data points with control averages representing only two locations.
The calculated total body dose (from gaseous effluents) for 2006 was 3.17E-2 mrem, which is 0.04% of the average inner ring TLD values. Therefore, it can be concluded that discharges from the plant had very little impact upon the measured TLD values.
The maximum measurement from TLDs at the Independent Spent Fuel Storage Installation (ISFSI) was 784 milliroentgen per standard quarter. This is consistent with previous measurements. TLD measurements in the inner ring (site boundary) have remained relatively constant.
Figure 3.8 mR/year Direct Gamma Radiation (TLD) Results 250 200 150 100 50 0
1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 Inner Ring Outer Ring Control There is no reporting level for Direct Radiation (TLD)
Section 3 - Page 20
Table 3.8 Direct Gamma Radiation (TLD) Results Year Inner Ring Average Outer Ring Average Control (mR/yr) (mR/yr) (mR/yr)
Preoperational 113.1 123.9 148.9 1984 79.4 83.8 110.3 1985 116.9 121.5 156.6 1986 104.2 106.0 150.9 1987 84.3 88.8 104.3 1988 72.3 78.6 112.6 1989 63.7 61.7 89.4 1990 52.2 50.7 70.1 1991 61.2 65.0 88.0 1992 76.2 73.2 92.0 1993 74.8 80.6 93.0 1994 86.8 94.7 112.0 1995 93.6 101.7 132.0 1996 68.5 78.3 101.0 1997 72.8 83.8 104.5 1998 71.7 80.8 118.0 1999 74.5 82.5 104 2000 76.2 84.5 105.6 2001 73.6 82.4 102.2 2002 76.6 85.3 108.0 2003 77.4 86.6 108.8 2004 80.1 87.5 110.4 2005 79.3 89.0 104.7 Average (1996 - 2005) 75.1 84.1 106.7 2006 82.0 90.2 108.8 Section 3 - Page 21
3.9 LAND USE CENSUS The Land Use Census was conducted during the growing season (6/19 - 6/20/2006) as required by SLC 16.11.6. Table 3.9 summarizes census results. A map indicating identified locations is shown in Figure 3.9. The nearest residence is located in the NW sector at 1.00 miles. No program changes were required based on the results of the census.
Table 3.9 Oconee 2006 Land Use Census Results Sector Distance Sector Distance (Miles) (Miles)
Nearest Residence 2.98 Nearest Residence 1.96 N Nearest Milk Animal - S Nearest Milk Animal -
Nearest Residence 1.85 Nearest Residence 1.36 NNE Nearest Milk Animal - SSW Nearest Milk Animal -
Nearest Residence 1.20 Nearest Residence 1.39 NE Nearest Milk Animal - SW Nearest Milk Animal -
Nearest Residence 1.34 Nearest Residence 1.81 ENE Nearest Milk Animal - WSW Nearest Milk Animal -
Nearest Residence 1.14 Nearest Residence 1.76 E Nearest Milk Animal - W Nearest Milk Animal -
Nearest Residence 1.57 Nearest Residence 1.35 ESE Nearest Milk Animal - WNW Nearest Milk Animal -
Nearest Residence 1.46 Nearest Residence 1.00 SE Nearest Milk Animal - NW Nearest Milk Animal -
Nearest Residence 1.54 Nearest Residence 1.06 SSE Nearest Milk Animal - NNW Nearest Milk Animal -
- indicates no occurrences within the 5 mile radius
- GPS data reflect approximate accuracy to within 2-5 meters. GPS field measurements were taken as close as possible to the item of interest.
Section 3 - Page 22
Figure 3.9 Section 3 - Page 23
4.0 EVALUATION OF DOSE 4.1 DOSE FROM ENVIRONMENTAL MEASUREMENTS Annual doses to maximum exposed individuals were estimated based on measured concentrations of radionuclides in 2006 ONS REMP samples. The primary purpose of estimating doses based on sample results is to allow comparison to effluent program dose estimates. Doses based on sample results were conservatively calculated in a manner as equivalent as possible to effluent-based dose estimates.
Doses based on REMP sample results were calculated using the methodology and data presented in NRC Regulatory Guide 1.109. Measured radionuclide concentrations, averaged over the entire year for a specific radionuclide, indicator location, and sample type, were used to calculate REMP-based doses, after subtracting the applicable average background concentration (as measured at the corresponding control location). Regulatory Guide 1.109 consumption rates for the maximum exposed individual were used in the calculations. A dose factor of zero was assumed when the guide listed NO DATA as the dose factor for a given radionuclide and organ.
Maximum dose estimates calculated using drinking water, broadleaf vegetation, fish and shoreline sediment results are reported in Table 4.1-A. The individual critical population and pathway dose calculations are contained in Table 4.1-B.
No radionuclides were detected in milk, airborne radioiodine or airborne particulate samples other than naturally-occurring K-40 and Be-7. Dose estimates were not calculated for surface water samples because surface water is not considered a potable drinking water source although surface water tritium concentrations are used in calculating doses from fish.
REMP TLD exposure results are discussed in Section 3.8.
The maximum environmental organ dose estimate for any single sample type (other than direct radiation from gaseous effluents) collected during 2006 was 1.50E-1 mrem to the child bone from consuming broadleaf vegetation.
4.2 ESTIMATED DOSE FROM RELEASES Throughout the year, dose estimates were calculated based on actual 2006 liquid and gaseous effluent release data. Effluent-based dose estimates were calculated using the RETDAS computer program which employs methodology and data presented in NRC Regulatory Guide 1.109. These doses are shown in Table 4.1-A along with the corresponding REMP-based dose estimates. Summaries of RETDAS dose calculations are reported in the Annual Radioactive Effluent Release Report (reference 6.6).
The effluent-based liquid release doses are summations of the dose contributions of the drinking water, fish and shoreline pathways. The effluent-based gaseous release doses report Section 4 - Page 1
noble gas exposure separately from iodine, particulate, and tritium exposure. For noble gas exposure there is no critical age group; as the maximum exposed individuals are assumed to receive the same doses, regardless of their age group. For iodine, particulate, and tritium exposure the effluent-based gaseous release doses are summations of the dose contributors from ground/plane, milk, inhalation and vegetation pathways.
4.3 COMPARISON OF DOSES The liquid environmental and release data doses given in Table 4.1-A agree reasonably well.
The similarity of the doses indicate that the radioactivity levels in the environment do not differ significantly from those expected based on effluent measurements and modeling of the environmental exposure pathways. The calculated environmental doses for gaseous pathways are slightly higher than effluent doses. This is due to one broadleaf vegetation sample that contained Cs-137. Some Cs-137 was released from the Oconee plant but the wind was not blowing toward the sector where the positive sample was collected (See PIP O-07-1989). As stated in section 3.5, it is not unusual to observe Cs-137 in the environment due to past plant releases and weapons testing.
In addition, there are some differences in how effluent and environmental doses are calculated that affect the comparison. Doses calculated from environmental data are conservative because they are based on a mean that includes only samples with a net positive activity versus a mean that includes all sample results (i.e. zero results are not included in the mean).
Also, airborne tritium is not measured in environmental samples but is used to calculate effluent doses.
In calculations based on liquid release effluent pathways, fish and drinking water were the predominant dose pathways based on environmental and effluent samples. The maximum total organ dose based on 2006 environmental sample results was 1.28E-1 mrem to the adult liver. The maximum total organ dose of 2.53E-1 mrem for liquid effluent-based estimates was to the adult liver.
In calculations based on gaseous release pathways, vegetation was the predominant dose pathway for effluent samples. The gaseous effluent dose is due to tritium on broadleaf vegetation. The maximum total organ dose for gaseous effluent estimates was 3.60E-2 mrem to the child thyroid. Vegetation was the only gaseous release pathway media that contained detectable activity (See Section 3.5). The maximum total organ dose for gaseous environmental estimates was 1.50E-1 mrem to the child bone. This dose is based on one broadleaf vegetation sample with detectable Cs-137 activity discussed in paragraph one above.
Noble gas samples are not collected as part of the REMP, preventing an analogous comparison of effluent-based noble gas exposure estimates.
The doses calculated do not exceed the 40CFR190 dose commitment limits for members of the public. Doses to members of the public attributable to the operation of ONS are being maintained well within regulatory limits.
Section 4 - Page 2
TABLE 4.1-A Page 1 of 3 OCONEE NUCLEAR STATION 2006 ENVIRONMENTAL AND EFFLUENT DOSE COMPARISON LIQUID RELEASE PATHWAY Environmental Critical Critical Maximum Dose (3)
Organ or Location Age (1) Pathway (2) (mrem)
Effluent Data Skin Environmental Teen Shoreline Sediment 063 (0.80 mi ESE) 1.32E-04 Skin Effluent Teen Shoreline Sediment 1.0 mi SW 1.89E-03 Bone Environmental Child Fish 063 (0.80 mi ESE) 8.71E-02 Bone Effluent Child Fish 1.0 mi SW 1.75E-01 Liver Environmental Adult Fish 063 (0.80 mi ESE) 1.28E-01 Liver Effluent Adult Fish 1.0 mi SW 2.53E-01 T. Body Environmental Adult Fish 063 (0.80 mi ESE) 9.73E-02 T. Body Effluent Adult Fish 1.0 mi SW 1.92E-01 Thyroid Environmental Child Drinking Water 066 (18.9 mi SSE) 4.37E-02 Thyroid Effluent Child Drinking Water 1.0 mi SW 6.27E-02 Kidney Environmental Child Fish 063 (0.80 mi ESE) 7.08E-02 Kidney Effluent Adult Fish 1.0 mi SW 1.25E-01 Lung Environmental Child Drinking Water 066 (18.9 mi SSE) 5.34E-02 Lung Effluent Child Drinking Water 1.0 mi SW 8.32E-02 GI-LLI Environmental Child Drinking Water 066 (18.9 mi SSE) 4.42E-02 GI-LLI Effluent Adult Fish 1.0 mi SW 9.56E-02 (1) Critical Age is the highest total dose (all pathways) to an age group.
(2) Critial Pathway is the highest individual dose within the identified Critical Age group.
(3) Maximum dose is a summation of the fish, drinking water and shoreline sediment pathways.
Section 4 - Page 3
Page 2 of 3 GASEOUS RELEASE PATHWAY IODINE, PARTICULATE, and TRITIUM Environmental or Critical Critical Maximum Dose (3)
Organ Location Effluent Data Age (1) Pathway (2) (mrem)
Skin Environmental - - - 0.00E+00 Skin Effluent All Ground Plane 1.0 mi. SW 1.24E-04 Bone Environmental Child Vegetation 077 (1.0 mi SW) 1.50E-01 Bone Effluent Child Vegetation 1.0 mi. SW 3.22E-04 Liver Environmental Child Vegetation 077 (1.0 mi SW) 1.44E-01 Liver Effluent Child Vegetation 1.0 mi. SW 3.19E-02 T. Body Environmental Adult Vegetation 077 (1.0 mi SW) 8.09E-02 T. Body Effluent Child Vegetation 1.0 mi. SW 3.17E-02 Thyroid Environmental - - - 0.00E+00 Thyroid Effluent Child Vegetation 1.0 mi. SW 3.60E-02 Kidney Environmental Child Vegetation 077 (1.0 mi SW) 4.69E-02 Kidney Effluent Child Vegetation 1.0 mi. SW 3.17E-02 Lung Environmental Child Vegetation 077 (1.0 mi SW) 1.69E-02 Lung Effluent Child Vegetation 1.0 mi. SW 3.17E-02 GI-LLI Environmental Adult Vegetation 077 (1.0 mi SW) 2.39E-03 GI-LLI Effluent Child Vegetation 1.0 mi. SW 3.17E-02 (1) Critical Age is the highest total dose (all pathways) to an age group.
(2) Critial Pathway is the highest individual dose within the identified Critical Age group.
(3) Maximum dose is a summation of the ground/plane, inhalation, milk and vegetation pathways.
Section 4 - Page 4
Page 3 of 3 NOBLE GAS Air Environmental or Critical Critical Maximum Dose Location Dose Effluent Data Age Pathway (mrad)
Beta Environmental - - - Not Sampled Beta Effluent N/A Noble Gas 1.0 mi. SW 9.21E-03 Gamma Environmental - - - Not Sampled Gamma Effluent N/A Noble Gas 1.0 mi. SW 3.69E-03 Section 4 - Page 5
TABLE 4.1-B Maximum Individual Dose for 2006 based on Environmental Measurements (mrem) for Oconee Nuclear Station Age Sample Medium Bone Liver T. Body Thyroid Kidney Lung GI-LLI Skin Infant Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL 0.00E+00 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 0.00E+00 Child Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 1.50E-01 1.44E-01 2.13E-02 0.00E+00 4.69E-02 1.69E-02 9.02E-04 0.00E+00 Fish 8.71E-02 9.18E-02 2.08E-02 8.47E-03 3.56E-02 1.82E-02 8.99E-03 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 2.36E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.75E-05 TOTAL 2.37E-01 2.71E-01 7.73E-02 4.37E-02 1.18E-01 7.03E-02 4.51E-02 2.75E-05 Teen Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 8.33E-02 1.11E-01 3.86E-02 0.00E+00 3.77E-02 1.46E-02 1.58E-03 0.00E+00 Fish 6.92E-02 1.02E-01 4.23E-02 1.03E-02 4.16E-02 2.24E-02 1.16E-02 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 1.13E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.32E-04 TOTAL 1.53E-01 2.31E-01 9.94E-02 2.87E-02 9.77E-02 5.54E-02 3.16E-02 1.32E-04 Adult Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 9.03E-02 1.23E-01 8.09E-02 0.00E+00 4.19E-02 1.39E-02 2.39E-03 0.00E+00 Fish 6.46E-02 1.02E-01 7.12E-02 1.33E-02 4.33E-02 2.33E-02 1.50E-02 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 2.02E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.36E-05 TOTAL 1.55E-01 2.51E-01 1.78E-01 3.94E-02 1.11E-01 6.33E-02 4.35E-02 2.36E-05 Note: Dose tables are provided for sample media displaying positive nuclide occurrence.
Section 4 - Page 6
Oconee Nuclear Station Dose from Drinking Water Pathway for 2006 Data Maximum Exposed Infant Infant Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)
Usage (intake in one year) = 330 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.99E-05 4.51E-06 NO DATA 4.41E-06 NO DATA 7.31E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 3.60E-06 8.98E-06 NO DATA NO DATA NO DATA 8.97E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 3.08E-05 5.38E-05 2.12E-05 NO DATA NO DATA 1.59E-05 2.57E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 1.08E-05 2.55E-05 NO DATA NO DATA NO DATA 2.57E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.84E-05 6.31E-05 2.91E-05 NO DATA 3.06E-05 NO DATA 5.33E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 4.20E-08 1.73E-08 1.00E-08 NO DATA 1.24E-08 NO DATA 1.46E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 2.06E-07 5.02E-08 3.56E-08 NO DATA 5.41E-08 NO DATA 2.50E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 3.59E-05 4.23E-05 1.86E-05 1.39E-02 4.94E-05 NO DATA 1.51E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 3.77E-04 7.03E-04 7.10E-05 NO DATA 1.81E-04 7.42E-05 1.91E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 5.22E-04 6.11E-04 4.33E-05 NO DATA 1.64E-04 6.64E-05 1.91E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 1.71E-04 1.71E-07 8.81E-06 NO DATA 4.06E-08 1.05E-07 4.20E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 3.08E-07 3.08E-07 3.08E-07 3.08E-07 3.08E-07 3.08E-07 066 340 0.00E+00 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 Dose Commitment (mrem) = 0.00E+00 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 3.46E-02 Section 4 - Page 7
Oconee Nuclear Station Dose from Drinking Water Pathway for 2006 Data Maximum Exposed Child Child Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)
Usage (intake in one year) = 510 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.07E-05 2.85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 1.80E-06 5.51E-06 NO DATA NO DATA NO DATA 1.05E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 1.65E-05 2.67E-05 1.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 C0-60 NO DATA 5.29E-06 1.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.37E-05 3.65E-05 2.27E-05 NO DATA 2.30E-05 NO DATA 6.41E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 2.25E-08 8.76E-09 6.26E-09 NO DATA 8.23E-09 NO DATA 1.62E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 1.16E-07 2.55E-08 2.27E-08 NO DATA 3.65E-08 NO DATA 2.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 1.72E-05 1.73E-05 9.83E-06 5.72E-03 2.84E-05 NO DATA 1.54E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 2.34E-04 3.84E-04 8.10E-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA 1.02E-04 3.67E-05 1.96E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 8.31E-05 7.28E-08 4.85E-06 NO DATA 2.37E-08 4.34E-08 4.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 066 340 0.00E+00 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 Dose Commitment (mrem) = 0.00E+00 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 3.52E-02 Section 4 - Page 8
Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2006 Data Maximum Exposed Child Child Dose from Vegetation Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
Usage (intake in one year) = 26 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Food Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI I-131 1.72E-05 1.73E-05 9.83E-06 5.72E-03 2.84E-05 NO DATA 1.54E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 2.34E-04 3.84E-04 8.10E-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA 1.02E-04 3.67E-05 1.96E-06 077 17.7 1.50E-01 1.44E-01 2.13E-02 0.00E+00 4.69E-02 1.69E-02 9.02E-04 Dose Commitment (mrem) = 1.50E-01 1.44E-01 2.13E-02 0.00E+00 4.69E-02 1.69E-02 9.02E-04 Section 4 - Page 9
Oconee Nuclear Station Dose from Fish Pathway for 2006 Data Maximum Exposed Child Child Dose from Fish Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
H-3 Concentration in Fish = Surface Water pCi/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 6718 pCi/l x 0.9 = 6046 pCi/kg Usage (intake in one year) = 6.9 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Fish Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.07E-05 2.85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 1.80E-06 5.51E-06 NO DATA NO DATA NO DATA 1.05E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 1.65E-05 2.67E-05 1.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 C0-60 NO DATA 5.29E-06 1.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.37E-05 3.65E-05 2.27E-05 NO DATA 2.30E-05 NO DATA 6.41E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 2.34E-04 3.84E-04 8.10E-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA 1.02E-04 3.67E-05 1.96E-06 063 38.6 8.71E-02 8.34E-02 1.23E-02 0.00E+00 2.72E-02 9.77E-03 5.22E-04 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 063.1 6046 0.00E+00 8.47E-03 8.47E-03 8.47E-03 8.47E-03 8.47E-03 8.47E-03 Dose Commitment (mrem) = 8.71E-02 9.18E-02 2.08E-02 8.47E-03 3.56E-02 1.82E-02 8.99E-03 Section 4 - Page 10
Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2006 Data Maximum Exposed Child Shoreline Recreation = 14 hr (in one year)
Shore Width Factor = 0.2 Sediment Surface Mass = 40 kg/m2 Child Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)
External Dose Factor Standing Highest Annual Net Dose on Contaminated Ground Mean Concentration (mrem/hr per pCi/m2) Indicator Sediment (mrem)
Radionuclide T. Body Skin Location (pCi/kg) T. Body Skin Cs-134 1.20E-08 1.40E-08 ALL 0.00 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 063 50.1 2.36E-05 2.75E-05 Dose Commitment (mrem) = 2.36E-05 2.75E-05 Section 4 - Page 11
Oconee Nuclear Station Dose from Drinking Water Pathway for 2006 Data Maximum Exposed Teen Teen Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)
Usage (intake in one year) = 510 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA 1.76E-06 NO DATA 1.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA 1.34E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 5.87E-06 1.37E-05 5.29E-06 NO DATA NO DATA 4.32E-06 3.24E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.81E-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 8.22E-09 4.56E-09 2.51E-09 NO DATA 4.42E-09 NO DATA 1.95E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 4.12E-08 1.30E-08 8.94E-09 NO DATA 1.91E-08 NO DATA 3.00E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 5.85E-06 8.19E-06 4.40E-06 2.39E-03 1.41E-05 NO DATA 1.62E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.45E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 1.12E-04 1.49E-04 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 2.84E-05 3.48E-08 1.83E-06 NO DATA 1.18E-08 2.34E-08 4.38E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 066 340 0.00E+00 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 Dose Commitment (mrem)= 0.00E+00 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 1.84E-02 Section 4 - Page 12
Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2006 Data Maximum Exposed Teen Teen Dose from Vegetation Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
Usage (intake in one year) = 42 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Food Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI I-131 5.85E-06 8.19E-06 4.40E-06 2.39E-03 1.41E-05 NO DATA 1.62E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.45E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 1.12E-04 1.49E-04 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 077 17.7 8.33E-02 1.11E-01 3.86E-02 0.00E+00 3.77E-02 1.46E-02 1.58E-03 Dose Commitment (mrem) = 8.33E-02 1.11E-01 3.86E-02 0.00E+00 3.77E-02 1.46E-02 1.58E-03 Section 4 - Page 13
Oconee Nuclear Station Dose from Fish Pathway for 2006 Data Maximum Exposed Teen Teen Dose from Fish Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
H-3 Concentration in Fish = Surface Water pCi/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 6718 pCi/l x 0.9 = 6046 pCi/kg Usage (intake in one year) = 16 kg Highest Annual Ingestion Dose Factor Net Mean Dose (mrem)
Concentration Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA 1.76E-06 NO DATA 1.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA 1.34E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 5.87E-06 1.37E-05 5.29E-06 NO DATA NO DATA 4.32E-06 3.24E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.81E-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.45E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 1.12E-04 1.49E-04 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 063 38.6 6.92E-02 9.20E-02 3.21E-02 0.00E+00 3.13E-02 1.22E-02 1.31E-03 H-3 NO DATA 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 063.1 6046 0.00E+00 1.03E-02 1.03E-02 1.03E-02 1.03E-02 1.03E-02 1.03E-02 Dose Commitment (mrem) = 6.92E-02 1.02E-01 4.23E-02 1.03E-02 4.16E-02 2.24E-02 1.16E-02 Section 4 - Page 14
Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2006 Data Maximum Exposed Teen Shoreline Recreation = 67 hr (in one year)
Shore Width Factor = 0.2 2
Sediment Surface Mass = 40 kg/m Teen Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)
External Dose Factor Standing Highest Annual Net Dose on Contaminated Ground Mean Concentration (mrem/hr per pCi/m2) Indicator Sediment (mrem)
Radionuclide T. Body Skin Location (pCi/kg) T. Body Skin Cs-134 1.20E-08 1.40E-08 ALL 0.00 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 063 50.1 1.13E-04 1.32E-04 Dose Commitment (mrem) = 1.13E-04 1.32E-04 Section 4 - Page 15
Oconee Nuclear Station Dose from Drinking Water Pathway for 2006 Data Maximum Exposed Adult Adult Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)
Usage (intake in one year) = 730 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 4.57E-06 8.72E-07 NO DATA 1.36E-06 NO DATA 1.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 7.45E-07 1.67E-06 NO DATA NO DATA NO DATA 1.51E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 4.34E-06 1.02E-05 3.91E-06 NO DATA NO DATA 2.85E-06 3.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.14E-06 4.72E-06 NO DATA NO DATA NO DATA 4.02E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 4.84E-06 1.54E-05 6.96E-06 NO DATA 1.03E-05 NO DATA 9.70E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 6.22E-09 3.46E-09 1.86E-09 NO DATA 3.42E-09 NO DATA 2.10E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 3.04E-08 9.75E-09 6.60E-09 NO DATA 1.53E-08 NO DATA 3.09E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 4.16E-06 5.95E-06 3.41E-06 1.95E-03 1.02E-05 NO DATA 1.57E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 6.22E-05 1.48E-04 1.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 2.03E-05 2.55E-08 1.33E-06 NO DATA 8.67E-09 1.46E-08 4.18E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 066 340 0.00E+00 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 Dose Commitment (mrem) = 0.00E+00 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 Section 4 - Page 16
Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2006 Data Maximum Exposed Adult Adult Dose from Vegetation (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
Usage (intake in one year) = 64 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Indicator Food Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI I-131 4.16E-06 5.95E-06 3.41E-06 1.95E-03 1.02E-05 NO DATA 1.57E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 6.22E-05 1.48E-04 1.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11E-06 077 17.7 9.03E-02 1.23E-01 8.09E-02 0.00E+00 4.19E-02 1.39E-02 2.39E-03 Dose Commitment (mrem) = 9.03E-02 1.23E-01 8.09E-02 0.00E+00 4.19E-02 1.39E-02 2.39E-03 Section 4 - Page 17
Oconee Nuclear Station Dose from Fish Pathway for 2006 Data Maximum Exposed Adult Adult Dose from Fish Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg)
H-3 Concentration in Fish = Surface Water pCi/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 6718 pCi/l x 0.9 = 6046 pCi/kg Usage (intake in one year) = 21 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)
Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 4.57E-06 8.72E-07 NO DATA 1.36E-06 NO DATA 1.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 7.45E-07 1.67E-06 NO DATA NO DATA NO DATA 1.51E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 4.34E-06 1.02E-05 3.91E-06 NO DATA NO DATA 2.85E-06 3.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.14E-06 4.72E-06 NO DATA NO DATA NO DATA 4.02E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 4.84E-06 1.54E-05 6.96E-06 NO DATA 1.03E-05 NO DATA 9.70E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 6.22E-05 1.48E-04 1.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11E-06 063 38.6 6.46E-02 8.84E-02 5.79E-02 0.00E+00 3.00E-02 9.97E-03 1.71E-03 H-3 NO DATA 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 063.1 6046 0.00E+00 1.33E-02 1.33E-02 1.33E-02 1.33E-02 1.33E-02 1.33E-02 Dose Commitment (mrem) = 6.46E-02 1.02E-01 7.12E-02 1.33E-02 4.33E-02 2.33E-02 1.50E-02 Section 4 - Page 18
Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2006 Data Maximum Exposed Adult Shoreline Recreation = 12 hr (in one year)
Shore Width Factor = 0.2 2
Sediment Surface Mass = 40 kg/m Adult Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)
External Dose Factor Standing Highest Annual Net Dose on Contaminated Ground Mean Concentration (mrem)
(mrem/hr per pCi/m2) Indicator Sediment Radionuclide T. Body Skin Location (pCi/kg) T. Body Skin Cs-134 1.20E-08 1.40E-08 ALL 0.00 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 063 50.1 2.02E-05 2.36E-05 Dose Commitment (mrem) = 2.02E-05 2.36E-05 Section 4 - Page 19
5.0 QUALITY ASSURANCE 5.1 SAMPLE COLLECTION EnRad Laboratories, Fisheries, and Aquatic Ecology performed the environmental sample collections as specified by approved sample collection procedures.
5.2 SAMPLE ANALYSIS EnRad Laboratories performed the environmental sample analyses as specified by approved analysis procedures. EnRad Laboratories is located in Huntersville, North Carolina, at Duke Energy Corporations Environmental Center.
5.3 DOSIMETRY ANALYSIS Duke Energy Corporations Environmental Center The Radiation Dosimetry and Records group performed environmental dosimetry measurements as specified by approved dosimetry analysis procedures.
5.4 LABORATORY EQUIPMENT QUALITY ASSURANCE 5.4.1 DAILY QUALITY CONTROL EnRad Laboratories has an internal quality assurance program which monitors each type of instrumentation for reliability and accuracy. Daily quality control checks ensure that instruments are in proper working order and these checks are used to monitor instrument performance.
5.4.2 CALIBRATION VERIFICATION National Institute of Standards and Technology (NIST) standards that represent counting geometries are analyzed as unknowns at various frequencies ranging from weekly to annually to verify that efficiency calibrations are valid. The frequency is dependent upon instrument use and performance. Investigations are performed and documented should calibration verification data fall out of limits.
5.4.3 BATCH PROCESSING Method quality control samples are analyzed with sample analyses that are processed in batches. These include gross beta in drinking water and all tritium analyses.
Section 5 - Page 1
5.5 DUKE ENERGY INTERCOMPARISON PROGRAM EnRad Laboratories participated in the Duke Energy Nuclear Generation Department Intercomparison Program during 2006. Interlaboratory cross-check standards, including, Marinelli beakers, air filters, air cartridges, gross beta on smears, and tritium in water samples were analyzed at various times of the year by the four counting laboratories in Duke Energy for this program. A summary of these Intercomparison Reports for 2006 is documented in Table 5.0-A.
5.6 DUKE ENERGY AUDITS The Oconee Radiation Protection Section was audited by the Quality Assurance Group in 2006. There were no REMP recommendations as a result of the audit.
EnRad Laboratories was audited by the Quality Assurance Group in 2006. There were no REMP recommendations as a result of the audit.
5.7 U.S. NUCLEAR REGULATORY COMMISSION INSPECTIONS The Oconee Nuclear Station Radiological Environmental Monitoring Program was audited by the NRC in 2006 (reference 6.12). The 2004 and 2005 AREORs were reviewed. No findings were noted in the report.
5.8 STATE OF SOUTH CAROLINA INTERCOMPARISON PROGRAM Oconee Nuclear Station routinely participates with the Bureau of Radiological Health of the States Department of Health and Environmental Control (DHEC) in an intercomparison program. Water, milk, vegetation, sediment, and fish samples collected by EnRad Laboratories are routinely split with DHEC for intercomparison analysis. DHEC collects air samples near two of the locations sampled for air by ONS. Results of the analyses performed on split and duplicate samples are sent to DHEC.
5.9 TLD INTERCOMPARISON PROGRAM 5.9.1 NUCLEAR TECHNOLOGY SERVICES INTERCOMPARISON PROGRAM Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA.
Nuclear Technology Services irradiates environmental dosimeters quarterly and sends them to the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. A summary of the Nuclear Technology Services Intercomparison Report is documented in Table 5.0-B.
Section 5 - Page 2
5.9.2 STATE OF NORTH CAROLINA INTERCOMPARISON PROGRAM Radiation Dosimetry and Records routinely participates in a TLD intercomparison program. The State of North Carolina Radiation Protection Section irradiates environmental dosimeters and sends them to the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. A summary of the State of North Carolina Environmental Dosimetry Intercomparison Report for 2006 is documented in Table 5.0-B.
5.9.3 INTERNAL CROSSCHECK (DUKE ENERGY)
Radiation Dosimetry and Records participates in a quarterly TLD intracomparison program administered internally by the Dosimetry Lab. The Dosimetry Lab Staff irradiates environmental dosimeters quarterly and submits them for analysis of the unknown estimated delivered exposure. A summary of the Internal Cross Check (Duke Energy) Result is documented in Table 5.0-B.
Section 5 - Page 3
TABLE 5.0-A DUKE POWER COMPANY INTERLABORATORY COMPARISON PROGRAM 2006 CROSS-CHECK RESULTS FOR ENRAD LABORATORIES Cross-Check samples are normally analyzed a minimum of three times. A status of "3 Pass" indicates that all three analyses yielded results within the designated acceptance range. A status of "1 Pass" indicates that one analysis of the cross-check was performed.
Footnote explanations are included following this data table.
Gamma in Water 3.5 liters Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 3/20/2006 Q061GWS Cr-51 3.02 - 5.35 E5 4.02 E5 3.88 E5 3 Pass Co-57 1.37 - 2.42 E4 1.82 E4 1.86 E4 3 Pass Co-60 0.76 - 1.34 E5 1.01 E5 0.95 E5 3 Pass Sr-85 7.28 - 12.91 E4 9.71 E4 9.00 E4 3 Pass Y-88 1.27 - 2.25 E5 1.69 E5 1.62 E5 3 Pass Cd-109 3.72 - 6.60 E5 4.96 E5 4.97 E5 3 Pass Sn-113 6.65 - 11.80 E4 8.87 E4 8.60 E4 3 Pass Te-123M 1.62 - 2.86 E4 2.15 E4 2.09 E4 3 Pass Cs-137 6.30 - 11.17 E4 8.40 E4 7.69 E4 3 Pass 5/16/2006 Q062GWR Cr-51 0.94 - 1.67 E4 1.26 E4 1.26 E4 3 Pass Co-57 1.97 - 3.50 E2 2.63 E2 2.76 E2 3 Pass Co-60 0.98 - 1.75 E3 1.31 E3 1.30 E3 3 Pass Sr-85 1.39 - 2.47 E3 1.86 E3 1.82 E3 3 Pass Y-88 2.07 - 3.66 E3 2.76 E3 2.69 E3 3 Pass Cd-109 4.99 - 8.86 E3 6.66 E3 6.57 E3 3 Pass Sn-113 1.06 - 1.89 E3 1.42 E3 1.25 E3 3 Pass Te-123M 2.62 - 4.64 E2 3.49 E2 3.40 E2 3 Pass Cs-137 0.82 - 1.45 E3 1.09 E3 1.06 E3 3 Pass 10/11/2006 Q064GWS Cr-51 7.12 - 12.62 E4 9.49 E4 9.66 E4 3 Pass Mn-54 5.26 - 9.33 E4 7.02 E4 7.41 E4 3 Pass Co-58 4.17 - 7.39 E4 5.55 E4 5.66 E4 3 Pass Fe-59 1.42 - 2.53 E4 1.90 E4 2.01 E4 3 Pass Co-60 6.57 - 11.65 E4 8.76 E4 9.26 E4 3 Pass Zn-65 6.67 - 11.84 E4 8.90 E4 9.30 E4 3 Pass Cs-134 4.12 - 7.30 E4 5.49 E4 5.12 E4 3 Pass Cs-137 0.87 - 1.54 E5 1.16 E5 1.12 E5 3 Pass Ce-141 2.40 - 4.26 E4 3.20 E4 3.30 E4 3 Pass Section 5 - Page 4
Gamma in Water 1.0 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 3/20/2006 Q061GWS Cr-51 3.02 - 5.35 E5 4.02 E5 3.70 E5 3 Pass Co-57 1.37 - 2.42 E4 1.82 E4 1.80 E4 3 Pass Co-60 0.76 - 1.34 E5 1.01 E5 0.92 E5 3 Pass Sr-85 7.28 - 12.91 E4 9.71 E4 8.73 E4 3 Pass Y-88 1.27 - 2.25 E5 1.69 E5 1.56 E5 3 Pass Cd-109 3.72 - 6.60 E5 4.96 E5 4.59 E5 3 Pass Sn-113 6.65 - 11.80 E4 8.87 E4 8.27 E4 3 Pass Te-123M 1.62 - 2.86 E4 2.15 E4 2.00 E4 3 Pass Cs-137 6.30 - 11.17 E4 8.40 E4 7.54 E4 3 Pass 5/16/2006 Q062GWR Cr-51 0.94 - 1.67 E4 1.26 E4 1.20 E4 3 Pass Co-57 1.97 - 3.50 E2 2.63 E2 2.64 E2 3 Pass Co-60 0.98 - 1.75 E3 1.31 E3 1.26 E3 3 Pass Sr-85 1.39 - 2.47 E3 1.86 E3 1.76 E3 3 Pass Y-88 2.07 - 3.66 E3 2.76 E3 2.58 E3 3 Pass Cd-109 4.99 - 8.86 E3 6.66 E3 6.34 E3 3 Pass Sn-113 1.06 - 1.89 E3 1.42 E3 1.17 E3 3 Pass Te-123M 2.62 - 4.64 E2 3.49 E2 3.02 E2 3 Pass Cs-137 0.82 - 1.45 E3 1.09 E3 0.99 E3 3 Pass 10/11/2006 Q064GWS Cr-51 7.12 - 12.62 E4 9.49 E4 9.42 E4 3 Pass Mn-54 5.26 - 9.33 E4 7.02 E4 7.38 E4 3 Pass Co-58 4.17 - 7.39 E4 5.55 E4 5.63 E4 3 Pass Fe-59 1.42 - 2.53 E4 1.90 E4 2.00 E4 3 Pass Co-60 6.57 - 11.65 E4 8.76 E4 8.73 E4 3 Pass Zn-65 6.67 - 11.84 E4 8.90 E4 9.26 E4 3 Pass Cs-134 4.12 - 7.30 E4 5.49 E4 5.02 E4 3 Pass Cs-137 0.87 - 1.54 E5 1.16 E5 1.12 E5 3 Pass Ce-141 2.40 - 4.26 E4 3.20 E4 3.25 E4 3 Pass Gamma in Water 0.5 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 3/20/2006 Q061GWS Cr-51 3.02 - 5.35 E5 4.02 E5 3.76 E5 3 Pass Co-57 1.37 - 2.42 E4 1.82 E4 1.70 E4 3 Pass Co-60 0.76 - 1.34 E5 1.01 E5 0.92 E5 3 Pass Sr-85 7.28 - 12.91 E4 9.71 E4 8.50 E4 3 Pass Y-88 1.27 - 2.25 E5 1.69 E5 1.54 E5 3 Pass Cd-109 3.72 - 6.60 E5 4.96 E5 4.53 E5 3 Pass Sn-113 6.65 - 11.80 E4 8.87 E4 8.23 E4 3 Pass Te-123M 1.62 - 2.86 E4 2.15 E4 1.96 E4 3 Pass Cs-137 6.30 - 11.17 E4 8.40 E4 7.26 E4 3 Pass Section 5 - Page 5
Gamma in Water 0.5 liter, continued Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 10/11/2006 Q064GWS Cr-51 7.12 - 12.62 E4 9.49 E4 10.13 E4 3 Pass Mn-54 5.26 - 9.33 E4 7.02 E4 7.40 E4 3 Pass Co-58 4.17 - 7.39 E4 5.55 E4 5.64 E4 3 Pass Fe-59 1.42 - 2.53 E4 1.90 E4 2.08 E4 3 Pass Co-60 6.57 - 11.65 E4 8.76 E4 8.96 E4 3 Pass Zn-65 6.67 - 11.84 E4 8.90 E4 9.51 E4 3 Pass Cs-134 4.12 - 7.30 E4 5.49 E4 4.97 E4 3 Pass Cs-137 0.87 - 1.54 E5 1.16 E5 1.11 E5 3 Pass Ce-141 2.40 - 4.26 E4 3.20 E4 3.23 E4 3 Pass Gamma in Water 0.25 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 5/16/2006 Q062GWR Cr-51 0.94 - 1.67 E4 1.26 E4 1.20 E4 3 Pass Co-57 1.95 - 3.55 E2 2.63 E2 2.66 E2 3 Pass Co-60 0.98 - 1.75 E3 1.31 E3 1.34 E3 3 Pass Sr-85 1.39 - 2.47 E3 1.86 E3 1.68 E3 3 Pass Y-88 2.07 - 3.66 E3 2.76 E3 2.61 E3 3 Pass Cd-109 4.66 - 9.52 E3 6.66 E3 6.60 E3 3 Pass Sn-113 1.06 - 1.89 E3 1.42 E3 1.14 E3 3 Pass Te-123M 2.58 - 4.71 E2 3.49 E2 2.96 E2 3 Pass Cs-137 0.82 - 1.45 E3 1.09 E3 1.00 E3 3 Pass 10/11/2006 Q064GWS Cr-51 7.12 - 12.62 E4 9.49 E4 9.80 E4 3 Pass Mn-54 5.26 - 9.33 E4 7.02 E4 7.50 E4 3 Pass Co-58 4.17 - 7.39 E4 5.55 E4 5.63 E4 3 Pass Fe-59 1.42 - 2.53 E4 1.90 E4 2.14 E4 3 Pass Co-60 6.57 - 11.65 E4 8.76 E4 8.93 E4 3 Pass Zn-65 6.67 - 11.84 E4 8.90 E4 9.60 E4 3 Pass Cs-134 4.12 - 7.30 E4 5.49 E4 4.91 E4 3 Pass Cs-137 0.87 - 1.54 E5 1.16 E5 1.12 E5 3 Pass Ce-141 2.40 - 4.26 E4 3.20 E4 3.29 E4 3 Pass Section 5 - Page 6
Gamma in Filter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi pCi pCi 2/24/2006 A20206-04 Cr-51 7.33 - 12.99 E4 9.77 E4 9.56 E4 3 Pass Mn-54 1.29 - 2.29 E4 1.72 E4 1.76 E4 3 Pass Sample Sample (1)
Co-57 Contaminant Contaminant 2.30 E2 N/A Co-58 1.82 - 3.23 E4 2.43 E4 2.35 E4 3 Pass Fe-59 1.76 - 3.13 E4 2.35 E4 2.32 E4 3 Pass Co-60 1.72 - 3.05 E4 2.29 E4 2.22 E4 3 Pass Zn-65 2.54 - 4.51 E4 3.39 E4 3.34 E4 3 Pass Cs-134 1.65 - 2.93 E4 2.20 E4 2.01 E4 3 Pass Cs-137 1.19 - 2.10 E4 1.58 E4 1.47 E4 3 Pass Sample Sample (1)
Ce-139 Contaminant Contaminant 3.99 E2 N/A Ce-141 2.47 - 4.38 E4 3.29 E4 3.16 E4 3 Pass 6/8/2006 E4980-37 Cr-51 1.41 - 3.04 E2 2.07 E2 1.98 E2 3 Pass Mn-54 0.88 - 1.56 E2 1.17 E2 1.16 E2 3 Pass Co-58 6.00 - 10.64 E1 8.00 E1 7.86 E1 3 Pass Fe-59 5.63 - 9.98 E1 7.50 E1 7.73 E1 3 Pass Co-60 0.77 - 1.37 E2 1.03 E2 1.05 E2 3 Pass Zn-65 1.11 - 1.97 E2 1.48 E2 1.40 E2 3 Pass Sample Sample Too Low to Cd-109 Contaminant Contaminant Quantify N/A (1)
Cs-134 0.76 - 1.34 E2 1.01 E2 0.91 E2 3 Pass Cs-137 7.05 - 12.50 E1 9.40 E1 8.72 E1 3 Pass Sample Sample Ce-139 Contaminant Contaminant 8.90 E0 N/A (1)
Ce-141 1.10 - 1.96 E2 1.47 E2 1.35 E2 3 Pass Iodine in Water Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 3/20/2006 Q061LIW1 I-131 2.42 - 4.30 E3 3.23 E3 3.31 E3 3 Pass 3/20/2006 Q061LIW2 I-131 N/A 0.00E+00 0.00E+00 3 Pass 3/20/2006 Q061LIW3 I-131 1.60 - 2.83 E3 2.13 E3 2.31 E3 3 Pass Iodine on Cartridge Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi pCi pCi 2/24/2006 A20207-04 I-131 N/A N/A N/A N/A (2) 6/8/2006 E4981-37 I-131 4.88 - 8.65 E1 6.50 E1 7.31 E1 3 Pass Section 5 - Page 7
Beta in Water Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 6/8/2006 E4982-37 Beta 1.27 -2.25 E2 1.69 E2 1.65 E2 3 Pass Beta Smear Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status dpm dpm dpm 2/24/2006 A20204-04 Beta 1.18 - 2.09 E4 1.57 E4 1.59 E4 3 Pass 11/10/2006 A21058-04 Beta 1.02 - 1.81 E4 1.36 E4 1.32 E4 3 Pass Tritium in Water Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 3/21/2006 Q061TWSL1 H-3 1.52 - 2.70 E5 2.03 E5 1.99 E5 3 Pass 3/21/2006 Q061TWSL2 H-3 N/A 0.00E+00 0.00E+00 3 Pass 5/8/2006 Q062TWR1 H-3 N/A 0.00E+00 0.00E+00 3 Pass 5/8/2006 Q062TWR2 H-3 2.70 - 4.79 E3 3.60 E3 3.59 E3 3 Pass 5/8/2006 Q062TWR3 H-3 5.89 - 10.45 E2 7.86 E2 8.12 E2 3 Pass 9/13/2006 Q063TWSL1 H-3 0.77 - 1.37 E5 1.03 E5 1.03 E5 3 Pass 9/13/2006 Q063TWSL2 H-3 N/A 0.00E+00 0.00E+00 3 Pass Section 5 - Page 8
Table 5.0-A Footnote Explanations (1) Gamma in Filter, Sample ID A20206-04, Reference Date 2/24/2006 & Gamma in Filter, Sample ID E4980-37, Reference Date 6/8/2006 Co-57, Cd-109 and Ce-139 was identified and reported for two cross-check samples. Co-57 and Ce-139 was identified in gamma filter A20206-04 and Cd-109 and Ce-139 was identified in gamma filter E4980-37. The cross check supplier does not include these radionuclides on the certificates of analysis for these two cross-check samples. These radionuclides were determined to be inherent contaminants in the cross-check samples. PIP G-06-00421 written.
(2) Iodine on Cartridge, Sample ID A20207-04, Reference Date 2/24/2006 Cross-check A20207-04 was not analyzed in a timely manner for reporting.
Cross-check data was not reported for this sample due to excessive sample decay.
PIP G-06-00246 written.
Section 5 - Page 9
TABLE 5.0-B 2006 ENVIRONMENTAL DOSIMETER CROSS-CHECK RESULTS Nuclear Technology Services 1st Quarter 2006 2nd Quarter 2006 TLD Delivered Reported Bias Pass/Fail TLD Delivered Reported Bias Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail 102038 89 96.9 8.88 <+/-15% Pass 102480 67 68.5 2.24 <+/-15% Pass 102055 89 92.1 3.48 <+/-15% Pass 102481 67 68.6 2.39 <+/-15% Pass 102057 89 91.7 3.03 <+/-15% Pass 102437 67 67.7 1.04 <+/-15% Pass 102303 89 91.0 2.25 <+/-15% Pass 102395 67 69.5 3.73 <+/-15% Pass 102305 89 91.6 2.92 <+/-15% Pass 102399 67 69.8 4.18 <+/-15% Pass Average Bias (B) 4.11 Average Bias (B) 2.72 Standard Deviation (S) 2.70 Standard Deviation (S) 1.25 Measure Performance lBl+S 6.81 <15% Pass Measure Performance lBl+S 3.97 <15% Pass 3rd Quarter 2006 4th Quarter 2006 TLD Delivered Reported Bias Pass/Fail TLD Delivered Reported Bias Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail 102444 83.6 88.1 5.38 <+/-15% Pass 100046 86.5 94.6 9.36 <+/-15% Pass 102424 83.6 87.7 4.90 <+/-15% Pass 100052 86.5 92.3 6.71 <+/-15% Pass 102502 83.6 87.2 4.31 <+/-15% Pass 100065 86.5 90.1 4.16 <+/-15% Pass 102464 83.6 85.3 2.03 <+/-15% Pass 100240 86.5 93.0 7.51 <+/-15% Pass 102157 83.6 83.7 0.12 <+/-15% Pass 100358 86.5 94.8 9.60 <+/-15% Pass Average Bias (B) 3.35 Average Bias (B) 7.47 Standard Deviation (S) 2.22 Standard Deviation (S) 2.22 Measure Performance lBl+S 5.56 <15% Pass Measure Performance lBl+S 9.68 <15% Pass State of North Carolina, Division of Radiation Protection Spring 2006 Fall 2006 TLD Delivered Reported Bias Pass/Fail TLD Delivered Reported Bias Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail 100246 55.0 58.8 6.91 <+/-15% Pass <+/-15%
100243 55.0 61.6 12.00 <+/-15% Pass NOTE: The Fall 2006 Environmental <+/-15%
100241 55.0 58.0 5.45 <+/-15% Pass Crosscheck was not administered <+/-15%
100240 55.0 58.2 5.82 <+/-15% Pass by the State of North Carolina <+/-15%
100239 55.0 59.6 8.36 <+/-15% Pass Division of Radiation Protection. <+/-15%
100236 55.0 57.2 4.00 <+/-15% Pass <+/-15%
100232 55.0 ** <+/-15% <+/-15%
100217 55.0 56.7 3.09 <+/-15% Pass <+/-15%
Average Bias (B) 6.52 Average Bias (B)
Standard Deviation (S) 2.98 Standard Deviation (S)
Measure Performance lBl+S 9.50 <15% Pass Measure Performance lBl+S <15%
- TLD Damaged Section 5 - Page 10
Internal Crosscheck (Duke Energy) 1st Quarter 2006 2nd Quarter 2006 TLD Delivered Reported Bias Pass/Fail TLD Delivered Reported Bias Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail 102261 49.0 48.6 -0.82 <+/-15% Pass 100007 61.0 58.4 -4.23 <+/-15% Pass 102244 49.0 49.1 0.13 <+/-15% Pass 100021 61.0 58.8 -3.54 <+/-15% Pass 102436 49.0 46.9 -4.31 <+/-15% Pass 100035 61.0 60.2 -1.38 <+/-15% Pass 102318 49.0 47.0 -4.17 <+/-15% Pass 100072 61.0 60.2 -1.39 <+/-15% Pass 102482 49.0 48.3 -1.39 <+/-15% Pass 100168 61.0 60.8 -0.30 <+/-15% Pass 102292 49.0 48.1 -1.93 <+/-15% Pass 100123 61.0 59.5 -2.43 <+/-15% Pass 102321 49.0 46.6 -4.86 <+/-15% Pass 100734 61.0 59.4 -2.55 <+/-15% Pass 102346 49.0 47.2 -3.70 <+/-15% Pass 100108 61.0 60.6 -0.61 <+/-15% Pass 102479 49.0 46.3 -5.46 <+/-15% Pass 100049 61.0 58.6 -3.94 <+/-15% Pass 102293 49.0 47.3 -3.45 <+/-15% Pass 100169 61.0 58.2 -4.65 <+/-15% Pass Average Bias (B) -3.00 Average Bias (B) -2.50 Standard Deviation (S) 1.87 Standard Deviation (S) 1.55 Measure Performance lBl+S 4.87 <15% Pass Measure Performance lBl+S 4.05 <15% Pass 3rd Quarter 2006 4th Quarter 2006 TLD Delivered Reported Bias Pass/Fail TLD Delivered Reported Bias Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail Number (mrem) (mrem) (% diff) Criteria Pass/Fail 101281 61.0 64.6 5.84 <+/-15% Pass 101024 60.0 62.0 3.28 <+/-15% Pass 101209 61.0 62.6 2.60 <+/-15% Pass 101190 60.0 60.3 0.50 <+/-15% Pass 101203 61.0 63.3 3.77 <+/-15% Pass 101191 60.0 60.3 0.51 <+/-15% Pass 101202 61.0 63.7 4.36 <+/-15% Pass 101195 60.0 60.8 1.32 <+/-15% Pass 101369 61.0 63.8 4.61 <+/-15% Pass 101038 60.0 62.6 4.27 <+/-15% Pass 101198 61.0 65.5 7.40 <+/-15% Pass 100026 60.0 61.9 3.19 <+/-15% Pass 101177 61.0 61.6 0.98 <+/-15% Pass 100096 60.0 60.2 0.32 <+/-15% Pass 101239 61.0 62.9 3.13 <+/-15% Pass 100522 60.0 62.5 4.21 <+/-15% Pass 101259 61.0 63.7 4.37 <+/-15% Pass 100740 60.0 60.8 1.36 <+/-15% Pass 101271 61.0 63.8 4.63 <+/-15% Pass 100759 60.0 61.8 3.03 <+/-15% Pass Average Bias (B) 4.17 Average Bias (B) 2.20 Standard Deviation (S) 1.75 Standard Deviation (S) 1.56 Measure Performance lBl+S 5.92 <15% Pass Measure Performance lBl+S 3.76 <15% Pass Section 5 - Page 11
6.0 REFERENCES
6.1 Oconee Selected License Commitment Manual 6.2 Oconee Technical Specifications 6.3 Oconee Updated Final Safety Analysis Report 6.4 Oconee Offsite Dose Calculation Manual 6.5 Oconee Annual Radiological Environmental Operating Report 1969-2005 6.6 Oconee Annual Radioactive Effluent Release Report 2006 6.7 Probability and Statistics in Engineering and Management Science, Hines and Montgomery, 1969, pages 287-293.
6.8 Practical Statistics for the Physical Sciences, Havilcek and Crain, 1988, pages 83-93.
6.9 Nuclear Regulatory Commission Regulatory Guide 1.109, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purposes of Evaluating Compliance with 10CFR50, Appendix I.
6.10 EnRad Laboratories Operating Procedures 6.11 RETDAS, Radiological Effluent Tracking and Dose Assessment Software, Canberra Version 3.5.1, DPC Revision #4.0 6.12 NRC Integrated Inspection Report 50-269/06-03, 50-270/06-03, 50-287/06-03, and 72-4/06-01 6.13 Duke Energy Corporation EnRad Laboratory Charcoal Cartridge Study, performed 2001 Section 6 - Page 1
APPENDIX A ENVIRONMENTAL SAMPLING ANALYSIS PROCEDURES Appendix A - Page 1
APPENDIX A ENVIRONMENTAL SAMPLING AND ANALYSIS PROCEDURES Adherence to established procedures for sampling and analysis of all environmental media at Oconee Nuclear Station is required to ensure compliance with Station Selected Licensee Commitments. Analytical procedures were employed to ensure that Selected Licensee Commitments detection capabilities were achieved.
Environmental sampling and analyses were performed by EnRad Laboratories, Dosimetry and Records, and Fisheries and Aquatic Ecology.
Section IV of this appendix describes the environmental sampling frequencies and analysis procedures by media type.
I. CHANGE OF SAMPLING PROCEDURES No changes were made to the sampling procedures during 2006.
II. DESCRIPTION OF ANALYSIS PROCEDURES Gamma spectroscopy analyses are performed using high purity germanium gamma detectors and Canberra analytical software. Designated sample volumes are transferred to appropriate counting geometries and analyzed by gamma spectroscopy. Perishable samples such as fish and broadleaf vegetation are ground to achieve a homogeneous mixture. Soils and sediments are dried, sifted to remove foreign objects (rocks, clams, glass, etc.) then transferred to appropriate counting geometry.
Low-level iodine analyses are performed by passing a designated sample aliquot through a pre-weighed amount of ion exchange resin to remove and concentrate any iodine in the aqueous sample (milk). The resin is then dried, mixed thoroughly, and a net resin weight determined before being transferred to appropriate counting geometry and analyzed by gamma spectroscopy.
Tritium analyses are performed quarterly by using low-level environmental liquid scintillation analysis technique on a Packard 2550 liquid scintillation system or Perkin-Elmer 2900TR liquid scintillation system. Tritium samples are distilled and batch processed with a tritium spike and blank to verify instrument performance and sample preparation technique are acceptable.
Appendix A - Page 2
Gross beta analysis is performed by concentrating a designated aliquot of sample precipitate and analyzing by Tennelec XLB Series 5 gas-flow proportional counters.
Samples are batch processed with a blank to ensure sample contamination has not occurred.
III. CHANGE OF ANALYSIS PROCEDURES A methodology based on nuclide abundance was implemented for determining Mn-54 activity in the presence of naturally occurring Ac-228 interference in certain media types. The method is described in PIP G-06-00040.
IV. SAMPLING AND ANALYSIS PROCEDURES A.1 AIRBORNE PARTICULATE AND RADIOIODINE Airborne particulate and radioiodine samples at each of six locations were composited continuously by means of continuous air samplers. Air particulates were collected on a particulate filter and radioiodines were collected in a charcoal cartridge positioned behind the filter in the sampler. The samplers are designed to operate at a constant flow rate (in order to compensate for any filter loading) and are set to sample approximately 2 cubic feet per minute. Filters and cartridges were collected weekly. A separate weekly gamma analysis was performed on each charcoal cartridge and air particulate. A weekly gross beta analysis was performed on each filter. The continuous composite samples were collected from the locations listed below.
Location 060 = Greenville Water Intake Rd. (2.58 mi. NNE)
Location 074 = Keowee Key Resort (2.36 mi. NNW)
Location 077 = Skimmer Wall (1.00 mi. SW)
Location 078 = Recreation Site (0.58 mi. WSW)
Location 079 = Keowee Dam (0.56 mi. NE)
Location 081 = Clemson Operations Center (9.33 mi. SE)
A.2 DRINKING WATER Monthly composite samplers were operated to collect an aliquot at least every two hours. Gross beta and gamma analysis was performed on the monthly composites. Tritium analysis was performed on the quarterly composites. The composites were collected monthly from the locations listed below.
Location 060 = Greenville Water Intake Rd. (3.23 mi. NE)
Location 064 = Seneca (6.67 mi. SSW)
Location 066 = Anderson (18.9 mi SSE)
Appendix A - Page 3
A.3 SURFACE WATER Monthly composite samplers were operated to collect an aliquot at least every two hours. Gamma analysis was performed on the monthly composites.
Tritium analysis was performed on the quarterly composites sample. The composites were collected monthly from the locations listed below.
Location 062 = Lake Keowee Hydro Intake (0.85 mi. ENE)
Location 063.1 = Lake Hartwell Hwy 183 Bridge (0.79 mi. E)
A.4 MILK Semimonthly grab samples were collected at one location. A gamma and low-level Iodine-131 analysis was performed on each sample. The semimonthly grab samples were collected from the location listed below.
Location 071 = Clemson Dairy (10.2 mi. SSE)
A.5 BROADLEAF VEGETATION Monthly samples were collected and a gamma analysis was performed on each sample. The samples were collected from the locations listed below.
Location 060 = Greenville Water Intake Rd. (2.58 mi. NNE)
Location 077 = Skimmer Wall (1.00 mi. SW)
Location 079 = Keowee Dam (0.56 mi. NE)
Location 081 = Clemson Operations Center (9.33 mi. SE)
A.6 FISH Semiannual samples were collected and a gamma analysis was performed on the edible portions of each sample. The samples were collected from the locations listed below.
Location 060 = Greenville Water Intake Rd. (2.28 mi. NE)
Location 063 = Lake Hartwell Hwy 183 Bridge (0.80 mi. ESE)
Location 067 = Lawrence Ramsey Bridge Hwy 27 (4.34 mi. SSE)
A.7 SHORELINE SEDIMENT Semiannual samples were collected and a gamma analysis was performed on each sample following the drying and removal of rocks and clams. The samples were collected from the locations listed below.
Location 063 = Lake Hartwell Hwy 183 Bridge (0.80 mi. ESE)
Appendix A - Page 4
Location 067 = Lawrence Ramsey Bridge Hwy 27 (4.34 mi. SSE)
Location 068 = High Falls County Park (1.82 mi. W)
A.8 DIRECT GAMMA RADIATION (TLD)
Thermoluminescent dosimeters (TLD) were collected quarterly at forty-two locations. A gamma exposure rate was determined for each TLD. The TLDs were placed as indicated below.
- An inner ring of 17 TLDs, one in each meteorological sector in the general area of the site boundary.
- An outer ring of 16 TLDs, one in each meteorological sector in the 6 to 8 kilometer range.
- The remaining TLDs were placed in special interest areas such as population centers, residential areas, schools, and control locations.
TLD Locations are listed in Table 2.1-B.
A.9 ANNUAL LAND USE CENSUS An annual Land Use Census was conducted to identify within a distance of 8 kilometers (5.0 miles) from the station, the following locations in each of the sixteen meteorological sectors:
- The Nearest Residence
- The Nearest Milk-giving Animal (cow, goat, etc.) where milk is used for human consumption The census was conducted during the growing season from 6/19 to 6/20/2006.
Results are shown in Table 3.9. No changes were made to the sampling procedures during 2006 as a result of the 2006 census.
V. GLOBAL POSITIONING SYSTEM (GPS) ANALYSIS The Oconee site centerline used for GPS measurements was referenced from the Oconee Nuclear Station Updated Final Safety Analysis Report (UFSAR), section 2.1.1.1, Specification of Location. Waypoint coordinates used for ONS GPS measurements were latitude 34°-47'-38.2"N and longitude 82°-53'-55.4"W. Maps and tables were generated using North American Datum (NAD) 27. Data normally reflect accuracy to within 2 to 5 meters from point of measurement. GPS field measurements were taken as close as possible to the item of interest. Distances for the locations are displayed using three significant figures.
Appendix A - Page 5
APPENDIX B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
OF RESULTS 2006 Appendix B - Page 1
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 Type and No. of Non-Medium or Location with Highest Total Lower Limit Control Routine Pathway All Indicator Locations Annual Mean Number of Detection Location Report Sampled Name, Distance, Direction of Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Air Particulate (pCi/m3) 081 (9.33 mi SE)
BETA 312 1.00E-02 2.03E-2 (260/260) 060 2.09E-2 (52/52) 2.00E-2 (52/52) 0 6.24E 3.23E-2 (2.58 mi NNE) 6.24E 3.23E-2 9.89E 2.83E-2 CS-134 312 5.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 312 6.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 312 7.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:43 Appendix B - Page 2
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Air Radioiodine (pCi/m3) 081 (9.33 mi SE)
CS-134 312 5.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 312 6.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 312 7.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:44 Appendix B - Page 3
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Drinking Water 064 (pCi/liter) (6.67 mi SSW)
BALA-140 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 BETA 39 4 1.33 (21/26) 066 1.54 (12/13) 1.75 (7/13) 0 0.65 - 2.09 (18.9 mi SSE) 0.92 - 2.09 0.85 - 4.04 CO-58 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-60 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 39 18 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 FE-59 39 30 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 H-3 12 2000 340 (3/8) 066 340 (3/4) 0.00 (0/4) 0 298 - 370 (18.9 mi SSE) 298 - 370 0.00 - 0.00 I-131 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 NB-95 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 39 30 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZR-95 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:44 Appendix B - Page 4
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Surface Water 062 (pCi/liter) (0.85 mi ENE)
BALA-140 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-58 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-60 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 26 18 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 FE-59 26 30 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 H-3 8 2000 6718 (4/4) 063.1 6718 (4/4) 0.00 (0/4) 0 2620 - 13600 (0.79 mi E) 2620 - 13600 0.00 - 0.00 I-131 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 NB-95 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 26 30 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZR-95 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:45 Appendix B - Page 5
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269, 270, 287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Milk NO INDICATOR 071 (10.2 mi SSE)
(pCi/liter) LOCATION BALA-140 26 15 0.00 (0/26) 0.00 (0/26) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 26 15 0.00 (0/26) 0.00 (0/26) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 26 18 0.00 (0/26) 0.00 (0/26) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 26 15 0.00 (0/26) 0.00 (0/26) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 LLI-131 26 1 0.00 (0/26) 0.00 (0/26) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:46 Appendix B - Page 6
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Broadleaf Vegetation 081 (9.33 mi SE)
(pCi/kg-wet)
CS-134 48 60 0.00 (0/36) 0.00 (0/12) 0.00 (0/12) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 48 80 17.7 (1/36) 077 17.7 (1/12) 0.00 (0/12) 0 17.7 - 17.7 (1.00 mi SW) 17.7 - 17.7 0.00 - 0.00 I-131 48 60 0.00 (0/36) 0.00 (0/12) 0.00 (0/12) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:46 Appendix B - Page 7
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Fish 060 (pCi/kg-wet) (2.28mi NE)
CO-58 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-60 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 12 150 41.9 (8/8) 063 55.8 (4/4) 17.2 (1/4) 0 18.0 - 96.3 (0.80 mi ESE) 32.1 - 96.3 17.2 - 17.2 FE-59 12 260 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 12 260 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:47 Appendix B - Page 8
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.
Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
(LLD)
Measurement Performed Range Code Range Range Shoreline 068 Sediment (1.82 mi W)
(pCi/kg-dry)
CS-134 6 150 0.00 (0/4) 0.00 (0/2) 0.00 (0/2) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 6 180 48.8 (4/4) 063 50.1 (2/2) 0.00 (0/2) 0 31.7 - 63.5 (0.80 mi ESE) 49.8 - 50.3 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:48 Appendix B - Page 9
Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2006 to 31-DEC-2006 No. of Non-Type and Total Location with Highest Medium or Lower Limit All Indicator Control Routine Number Annual Mean Pathway Sampled of Detection Locations Location Report of Name, Distance, Direction Meas.
Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)
Unit of Measurement (LLD)
Performed Range Code Range Range Direct Radiation TLD 058 (9.39 mi WSW)
(mR/standard quarter) 081 (9.33 mi SE) 168 0.00E+00 21.7 (160/160) 036 27.6 (4/4) 27.2 (8/8) 0 13.4 - 31.0 (4.32 mi N) 23.8 - 30.5 20.5 - 34.7 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)
Zero range indicates no detectable activity measurements Report Generated @ 4/26/2007 07:48 Appendix B - Page 10
APPENDIX C SAMPLING DEVIATIONS UNAVAILABLE ANALYSES Appendix C - Page 1
APPENDIX C OCONEE NUCLEAR STATION SAMPLING DEVIATIONS & UNAVAILABLE ANALYSES DEVIATION & UNAVAILABLE REASON CODES BF Blown Fuse PO Power Outage FZ Sample Frozen PS Pump out of service / Undergoing Repair IW Inclement Weather SL Sample Loss/Lost due to Lab Accident LC Line Clog to Sampler SM Motor / Rotor Seized OT Other TF Torn Filter PI Power Interrupt VN Vandalism PM Preventive Maintenance CN Construction C.1 SAMPLING DEVIATIONS Air Particulate and Air Radioiodines Scheduled Actual Reason Location Collection Dates Collection Dates Code Corrective Action Power to sampling equipment was interrupted during composite period due to blown fuses in both air samplers.
Fuses were replaced and normal 078 2/20-2/27/2006 2/20-2/26/2006 BF sampling resumed.
Power outage to site due to suspected lightning strike. Work request 34565 written, power restored and normal 077 5/15-5/22/2006 5/15-5/18/2006 PO sampling was resumed.
Drinking Water Scheduled Actual Reason Location Collection Dates Collection Dates Code Corrective Action Breaker supplying power to sampling equipment tripped during composite period. Insufficient composite sample was available. A grab sample was taken.
Breaker was reset, equipment verified operational, and normal sampling was 060 8/28-9/25/2006 9/25/2006 PI resumed.
Appendix C - Page 2
Surface Water Scheduled Actual Reason Location Collection Dates Collection Dates Code Corrective Action Power outage to sampling equipment.
Insufficient composite sample was available. A grab sample was taken.
Power was restored, equipment verified operational, and normal sampling was 062 1/16-2/13/2006 2/13/2006 PO resumed.
Maintenance discovered the reservoir pump inoperative while performing non-related work near sampling site. The reservoir pump was replaced and normal sampling resumed 3/13/2006 13:45. It is estimated the reservoir pump was out of 063.1 2/13-3/13/2006 2/13-3/13/2006 PS service from 3/8/2006 to 3/13/2006.
Reservoir pump found inoperative on 6/19/2006. Work request 35354 written. The reservoir pump had lost prime. The foot valve cover had fallen off and foot valve was clogged.
Maintenance added another valve to the line to improve flow control through the collection reservoir. The reservoir pump was returned to operation and normal 062 6/5-7/3/2006 6/5-7/3/2006 PS sampling resumed at 6/19/2006 17:00.
Flow from reservoir pump was interrupted. Water level in sample reservoir indicated interruption occurred near time of collection. Work request 40017 written. A new submersible pump was installed, flow was restored, and normal sampling resumed. Adjustment valve is now in place to throttle pump 063.1 10/23-11/20/2006 10/23-11/20/2006 PS flow if necessary.
C.2 UNAVAILABLE ANALYSES There were no unavailable analyses during 2006.
Appendix C - Page 3
APPENDIX D ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2006 Radiological Environmental Monitoring Program Appendix D - Page 1
APPENDIX E RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS This appendix includes all of the sample analysis reports generated from each sample medium for 2006. Appendix E is located separately from this report and is permanently archived at the Duke Energy Corporation Environmental Center radiological environmental master file, located at the McGuire Nuclear Station Site in Huntersville, North Carolina.
Appendix E - Page 1