ML21144A187

From kanterella
Jump to navigation Jump to search
Radiological Environmental Monitoring Program (January 1, 2020 to December 31, 2020)
ML21144A187
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 04/26/2021
From:
Virginia Electric & Power Co (VEPCO)
To:
Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
Shared Package
ML21144A206 List:
References
21-130
Download: ML21144A187 (71)
v • d • e


Text

Dominion Energy North Anna Power Station Radiological Environmental Monitoring Program January 1, 2020 to December 31, 2020 Prepared by Dominion Energy, North Anna Power Station

Annual Radiological Environmental Operating Report North Anna Power Station January 1, 2020 to December 31, 2020 Prepared by:

James W. Dunnavant visor Radiological Analysis and Instrumentation Dominion Energy North Anna Power Station Reviewed by:

Erin M. Salling Superintendent Health Physics Technical Services Dominion ergy North Anna Power Station Approved by:

George R. Simmons Manager Radiological Protection and Chemistry Dominion Energy North Anna Power Station 2

Table of Contents

1. EXECUTIVE

SUMMARY

... .. ..... .. .. ... .. ... ........ ....... .......... .... .. .... ..... .... ........ .. ... ....... .... ..... .. .. ...... .....4

2. PROGRAM DESCRIPTION ............. ....... .... .. ........ ... ............... ... ......... ..... ... .. ... .. ... .. ....... ... .............. 6 2.1 Introduction .. .... ....... ................. ..... ....... ..... ...... .. ............... .. .. ....... ........................... ....... .... ...... 6 2.2 Sampling and Analysis Program ............... ..... .. ............................. ....... .. ........ ............ .. ... ........ 7
3. ANALYTICAL RESULTS ...... .. .. .... .. ............ ......... .. .. .. .. ...... .. ........ .. ............. ................................ 21 3.1 Summary ofResults ........................ ..... ........ ... .. .... ............ ...... .. .................... ........ ................21 3.2 Analytical Results of 2020 REMP Samples .. .. ................ ... .. ... .. ........ .. ... .. .. .. .. .... .. .. .. .. ........ .. 30
4. DISCUSSION OF RESULTS .. ... .... .. ..... .. .... .. .. .. ..................... ..... .. .. .. .. .. .. .......... .. ... ......... .. .. .... ....... 58 4.1 Gamma Exposure Rate ...................... .... .. ....... .. .... .. ................ .... .... .... .............. ............ ........ 58 4.2 Airborne Gross Beta .................................. ............................. ... .. .... ..... ... ....... ..... .. ......... .......59 4.3 Airborne Radioiodine ... .......... ............. .. .... ..................... .. ......... ...... .. .. ... .... ..................... .......61 4.4 Air Particulate Gamma .................. ........ ... ..... .. .. .................... ... .. ... ................. .. ....................61 4.5 Air Particulate Strontium ...... ....... ...... ... .. ..... .... ... .... .. ....... ... ..... ........ ... ... .... ...... .. .............. ..... 61 4.6 Soil .... .. ............. ....... .. ............... .... ........ ........ ... ................... ... ......... ................... .. .......... ..... ...61 4.7 Precipitation ..................... ... ... ... ......... .. ... ..... ... .. ...... ...... ...... ..... ........ .. ....... ........ ...... ...... .. .. ....61 4.8 Cow Milk ......... ......................... ..... ... .. .. .... ...... ......... ...... .. .. ... .......... ........ ..............................61 4.9 Food Products and Vegetation ..... .. .... .. .. .. .. .... ...................... ... .. ........... .. ........ .. .. .... .. .. .. .... .. ... 62 4.10 Well Water ................ .. .. .. ............. ... ... .. .......... .. .. .. .... .. .. .. ....... ............ .. ............. .... .. .. ... ........ 62 4.11 River Water .. ....... .... .............. .. ....... .. .. .. .. ............ .. ................... .. ...... ... .. .. .. .. .... .. .. ... ... .. .........62 4.12 Surface Water .. ...................... .. ........... .. ..... ............ ... ....... .... ....... ............. .. .......... ......... .. .. .. ..63 4.13 Bottom Sediment ..................... .... .. .. .... .. .. .. .. .... .. ............................ .. .. ... ........... .. .................64 4.14 Shoreline Soil ............... ........ ......... .. .. .. ............... .............. .................. .. ......... ........... ...... .....64 4.15 Fish ............... ............................................... .. ... ........... ........... ......... .......... .. ..... .. ......... ........ 65
5. PROGRAM EXCEPTIONS ..................... ... .. .......... ... .... .. ........... .. ............ .. .. ........... .. ... ...... ...... .....66 REFERENCES ............ .. .. .... ............................ .... .... ... ....... ......................... ..................... .. .... ..... ... ... ... 67 APPENDICES .... ... ... ............ ...... .................. .... .... .... ........ ........... ..... .......... ... ......... ........ .. ... ................68 APPENDIX A: LAND USE CENSUS .. .. .. .. ............... ... .. ...................... .. .. ...... .. ............. ................69 APPENDIX B:

SUMMARY

OF INTERLABORATORY COMPARISONS ......................... .. .. ..72 3

1. EXECUTIVE

SUMMARY

This document is a detailed report of the 2020 North Anna Nuclear Power Station Radiological Environmental Monitoring Program (REMP). It is submitted in accordance with North Anna Unit 1 and 2 Technical Specification 5.6.2 and North Anna Independent Spent Fuel Storage Installation (ISFSI) Technical Specification 5 .5 .2. Radioactivity levels from January 1 through December 31, 2020, in water, silt, shoreline sediment, aquatic biota, food products, vegetation, and direct exposure pathways have been analyzed, evaluated and summarized. The REMP is designed to confirm that radiological effluent releases are As Low As Reasonably Achievable (ALARA), no undue environmental effects occur, and the health and safety of the public are protected. The program also detects any unexpected environmental processes that could allow radiation accumulations in the environment or food pathway chains.

Radiation and radioactivity in the environment are monitored within a 25-mile radius of the station. North Anna Power Station (NAPS) personnel collect a variety of samples within this area. A number of sampling locations for each medium are selected using available meteorological, land use, and water use data. Two types of samples are obtained. Control samples are collected from areas that are beyond the measurable influence of North Anna Power Station (NAPS) or any other nuclear facility. These samples are used as reference data. Normal background radiation levels, or radiation present due to causes other than North Anna Power Station (NAPS), can be compared to the environment surrounding the station. Indicator samples are the second sample type obtained. These samples show how much radiation is contributed to the environment by the station. Indicator samples are taken from areas close to the station where any station contribution will be at the highest concentration.

Prior to station operation, samples were collected and analyzed to determine the amount of radioactivity present in the area. The resulting values are used as a "pre-operational baseline." Analysis results from the indicator samples are compared to both current control sample values and the pre-operational baseline to determine if changes in radioactivity levels are attributable to station operations, or causes such as the Chernobyl accident, Fukushima Daiichi or natural variation.

Mirian Technologies provided thermoluminescent dosimetry (TLD) services and Teledyne Brown Engineering Environmental Services provided radioanalytical services. Participation in an Interlaboratory Comparison Program provides an independent check of sample measurement precision and accuracy.

Typically, radioactivity levels in the environment are so low that analysis values frequently fall below the minimum detection limits of state-of-the-art measurement methods. Because of this, the Nuclear Regulatory Commission (NRC) requires equipment used for radiological environmental monitoring be able to detect specified minimum Lower Limits of Detection (LLDs). This ensures that analyses are as accurate as possible.

The NRC also mandates a reporting level for certain radionuclides. Licensed nuclear facilities must report the radionuclide activities in those environmental samples that are equal to or greater than the specified reporting level. Environmental radiation levels are sometimes referred to as a percent of the reporting level.

Analytical results are reported for all possible radiation exposure pathways to man. These pathways include airborne, water, aquatic, terrestrial, and direct radiation exposure. The airborne exposure pathway includes radioactive airborne iodine and particulates, and precipitation. The 2020 airborne results were similar to

  • previous years. Fallout or natural radioactivity levels remained at levels consistent with past years ' results.

Water and aquatic exposure pathway samples include precipitation, surface, river and well water, silt and shoreline sediments, and fish . The average tritium activity in surface water for 2020 was 2793 pCi/liter. No other plant related isotopes were reported in any surface or river water. River water collected from the North Anna River, 5.8 miles downstream of the site had an average tritium level of 2858 pCi/liter. No plant related isotopes were detected in quarterly precipitation samples. Silt samples indicated the presence of naturally 4

occurring potassium-40 and thorium and uranium decay daughters at levels consistent with the natural background. Plant related isotope, Cs-137, was not identified in any indicator sample during the reporting period. The detection of Cs-137 in bottom sediment is historically common with positive indication usually apparent in both indicator and control samples. Shoreline soil, which may provide a direct exposure pathway, indicated the presence of potassium-40 and thorium and uranium decay daughters also at levels consistent with natural levels. No plant related isotope was detected in the indicator or control locations in shoreline soil. No plant related isotope was detected in fish samples from either Lake Anna or the control location, Lake Orange.

Soil samples, which are collected every three years from twelve stations, were not collected in 2020. During the preoperational phase Cs-137 was routinely detected and was attributed to fallout. Levels during this phase varied by location and date and ranged from 88 to 1390 pCi/Kg. The average was 645 pCi/kg.

The terrestrial exposure pathway includes milk and food/vegetation products. No milk samples were obtained during the reporting period since the last operating dairy farm within the sampling area closed on 01/01/2018 rendering milk samples unavailable. No plant related isotope was detected in any vegetation sample. Low levels of Cs-137 have been detected intermittently in past years due to weapons testing, Chernobyl, and Fukushima.

The direct exposure pathway measures environmental radiation doses by use of thermoluminescent dosimeters (TLDs). TLD results have remained essentially constant over the years.

During 2020, as in previous years, operation of the North Anna Power Station and the Independent Spent Fuel Storage Installation (ISFSI) created no adverse environmental effects or health hazards. The maximum total body dose calculated for a hypothetical individual at the station site boundary due to liquid and gaseous effluents released from the station during 2020 was 0.644 millirem. For reference, this dose may be compared to the 620 millirem average annual exposure to every person in the United States from natural and man-made sources. Natural background sources in the environment provide approximately 50% of radiation exposure to man, while medical uses provide approximately 48%. By comparison, nuclear power contributes less than 0.1 %. These results demonstrate not only compliance with federal and state regulations but also demonstrate the adequacy of radioactive effluent control at North Anna Power Station.

5 j

2. PROGRAM DESCRIPTION 2.1 Introduction This report documents the 2020 North Anna Power Station operational Radiological Environmental Monitoring Program (REMP).

The North Anna Power Station of Virginia Electric and Power Company (Dominion Energy) is located on Lake Anna in Mineral, Virginia, approximately 35 miles southwest of Fredericksburg, Virginia. The site consists of two units, each with a pressurized water reactor (PWR) nuclear steam supply system and turbine generator furnished by Westinghouse Electric Corporation. Each unit has a gross electrical output of 1029 megawatts electric (MWe). Unit 1 achieved commercial operation on June 6, 1978 and Unit 2 on December 14, 1980. An independent spent fuel storage facility was licensed for dry cask storage of spent fuel in 1998.

The United States Nuclear Regulatory Commission (USNRC) regulations require that nuclear power plants be designed, constructed, and operated to keep levels of radioactive material in effluents to unrestricted areas as low as reasonably achievable (ALARA) . To ensure these criteria are met, the operating license for North Anna Power Station includes Technical Specifications which address the release of radioactive effluents. In-plant monitoring is used to ensure release limits are not exceeded. As a precaution against unexpected or undefined environmental processes which might allow undue accumulation of radioactivity in the environment, a program for monitoring the plant environs is also included in the North Anna Power Station Offsite Dose Calculation Manual (ODCM).

North Anna Power Station is responsible for collecting the various indicator and control environmental samples. Mirion Technologies is utilized for processing the TLDs. Teledyne Brown Engineering Environmental Services (TBE) is utilized for sample analyses. The results of the analyses are used to determine if changes in radioactivity levels may be attributable to station operations. Measured values are compared with control levels, which vary with time due to external events, such as cosmic ray bombardment, nuclear weapons test fallout and seasonal variations of naturally occurring radioisotopes. Data collected prior to station operation is used to indicate the degree of natural variation to be expected. The pre-operational data is compared with data collected during the operational phase to assist in evaluating any radiological impact of station operation.

Occasionally samples of environmental media show the presence of man-made isotopes. As a method of referencing the measured radionuclide concentrations in the sample media to a dose consequence to man, the data is compared to the reporting level concentrations listed in North Anna's ODCM. These concentrations are based upon the annual dose commitment recommended by 10CFR50, Appendix I, to meet the criterion of "As Low As Is Reasonably Achievable".

This report documents the results of the Radiological Environmental Monitoring Program for 2020 and satisfies the following objectives of the program:

To provide measurements of radiation and of radioactive materials in those exposure pathways and for those radionuclides that lead to the highest potential radiation exposure of the maximum exposed member of the public resulting from station operations.

To supplement the radiological effluent monitoring program by verifying that radioactive effluents are within allowable limits.

To identify changes in radioactivity in the environment.

6

To verify that station operations have no detrimental effect on the health and safety of the public.

2.2 Sampling and Analysis Program Table 2-1 summarizes the 2020 sampling program for North Anna Power Station. All samples listed in Table 2-1 are taken at indicator locations except those labeled "control." The North Anna Radiological Monitoring Locations maps denote sample locations for North Anna Power Station. The locations are color coded to designate sample types. Table 2-2 summarizes the analysis program conducted by TBE for North Anna Power Station during the year 2020.

7

TABLE 2-1 North Anna Power Station - 2020 RADIOLOGICAL SAMPLING STATION DISTANCE AND DIRECTION FROM UNIT N O. 1 Collection Sample Media Location Station Distance Direction Degrees Frequency Remarks Environm ental NAPS Sewage Treatment Plant 01 0.20 NE 42° Quarterly & Annually Dosimetry (TLD) Fredericks Hall 02 5.30 SSW 203° Quarterly & Annually Mineral, Va 03 7.10 WSW 243° Quarterly & Annually Wares Crossroads 04 5.10 WNW 287° Quarterly & Annually Route 752 05 4.20 NNE 20° Quarterly & Annually Sturgeon's Creek Marina 05A 2.04 N 11 ° Quarterly & Annually Levy, VA 06 4.70 ESE 115° Quarterly & Annually Bwnpass, VA 07 7.30 SSE 167° Quarterly & Annually End of Route 685 21 1.00 WNW 301 ° Quarterly & Annually Route 700 22 1.00 WSW 242° Quarterly & Annually "Aspen Hills" 23 0.93 SSE 158° Quarterly & Annually Orange, VA 24 22.00 NW 325° Quarterly & Annually Control Bearing Cooling Tower N-1 /33 0.06 N 100 Quarterly Sturgeon's Creek Marina N-2/34 2.04 N 11 ° Quarterly Parking Lot "C" (on-site) NNE-3/35 0.24 NNE 32° Quarterly Good Hope Church NNE-4/36 3.77 NNE 25° Quarterly Parking Lot "B" NE-5/37 0.20 NE 42° Quarterly Lake Anna Marina (Bogg's Dr) NE-6/38 1.46 NE 34° Quarterly Weather Tower Fence ENE-7/39 0.36 ENE 74° Quarterly Route 689 ENE-8/40 2.43 ENE 65 ° Quarterly Near Training Facility E-9/41 0.30 E 91 ° Quarterly "Morning Glory Hill" E-10/42 2.85 E 93° Quarterly Island Dike ESE- 11/43 0.12 ESE 103° Quarterly Route 622 ESE-12/44 4.70 ESE 115° Quarterly DVP Biology Lab SE-13/45 0.64 SE 138° Quarterly Route 701 (Dam Entrance) SE-14/46 5.88 SE 137° Quarterly "Aspen Hills" SSE- 15/47 0.93 SSE 158° Quarterly Elk Creek SSE- 16/48 2.33 SSE 165 ° Quarterly NAPS Access Rd. S-17/49 0.36 s 173° Quarterly 8

TABLE 2-1 North Anna Power Station-2020 RADIOLOGICAL SAMPLING STATION DISTANCE AND DIRECTION FROM UNIT NO. 1 Collection Sample Media Location Station Distance Direction Degrees Frequency Remarks Environmental Elk Creek Church S- I 8/50 1.55 s 178° Quarterly Thermoluminescent NAPS Access Rd. SSW-19/51 0.24 SSW 197° Quarterly Dosimetry (TLD) Route 618 SSW-20/52 5.30 SSW 205 ° Quarterly 500kv Tower SW-21 /53 0.60 SW 218° Quarterly Route 700 SW-22/54 3.96 SW 232° Quarterly NAPS SE Switchyard WSW-23/55 0.38 WSW 237° Quarterly Route 700 (Exclusion Boundary) WSW-24/56 1.00 WSW 242° Quarterly South Gate Switchyard W-25/57 0.32 w 279° Quarterly Route 685 W-26/58 1.55 w 274° Quarterly End of Route 685 WNW-27/59 1.00 WNW 301 ° Quarterly Route 685 WNW-28/60 1.40 WNW 303° Quarterly North Gate - Laydown Area NW-29/61 0.52 NW 321 ° Quarterly Lake Anna Campground NW-30/62 2.54 NW 319° Quarterly

  1. 1/#2 Intake NNW-31/63 0.07 NNW 349° Quarterly Route 208 NNW-32/64 2.21 NNW 344° Quarterly Bumpass Post Office C-1/2 7.30 SSE 167° Quarterly Orange, VA C-3/4 22.00 NW 325 ° Quarterly Control Mineral, VA C-5/6 7.10 WSW 243 ° Quarterly Louisa, VA C-7/8 11.54 WSW 257° Quarterly Control Airborne Particulate NAPS Sewage Treatment Plant 01 0.20 NE 42° Weekly and Radioiodine Biology Lab 0lA 0.64 SE 138° Weekly Fredericks Hall 02 5.30 SSW 203 ° Weekly Mineral , VA 03 7.10 WSW 243 ° Weekly Wares Crossroads 04 5.10 WNW 287° Weekly Route 752 05 4.20 NNE 20° Weekly Sturgeon's Creek Marina 05A 2.04 N 11 ° Weekly Levy, VA 06 4.70 ESE 115° Weekly Bumpass, VA 07 7.30 SSE 167° Weekly 9

TABLE 2-1 North Anna Power Station - 2020 RADIOLOGICAL SAMPLING STATION DISTANCE AND DIRECTION FROM UNIT NO. 1 Collection Sample Media Location Station Distance Direction Degrees Frequency Remarks Airborne Particulate End of Route 685 21 1.00 WNW 301 ° Weekly and Radioiodine Route 700 22 1.00 WSW 242° Weekly "Aspen Hills" 23 0.93 SSE 158° Weekly Orange, VA 24 22.00 NW 325° Weekly Control Surface Water Waste Heat Treatment Facility 08 3.37 SSE 148° Monthly (Second Cooling Lagoon)

Lake Anna (upstream) 09A 12.90 WNW 295 ° Monthly Control (Route 669 Bridge)

River Water North Anna River (downstream) 11 5.80 SE 128° Monthly Ground Water Biology Lab 0lA 0.64 SE 138° Quarterly (Well Water)

Precipitation Biology Lab 0lA 0.64 SE 138° Monthly Aquatic Sediment Waste Heat Treatment Facility 08 3.37 SSE 148° Semi-Annually (Second Cooling Lagoon)

Lake Anna (upstream) 09A 12.90 WNW 295 ° Semi-Annually Control (Route 669 Bridge)

North Anna River (downstream) 11 5.80 SE 128° Semi-Annually Shoreline Soil Waste Heat Treatment Facility 08 3.37 SSE 148° Semi-Annually (Second Cooling Lagoon)

Soil NAPS Sewage Treatment Plant 01 0.20 NE 42° Once/3 years Fredericks Hall 02 5.30 SSW 203 ° Once/3 years Mineral , VA 03 7.10 WSW 243 ° Once/3 years Wares Crossroads 04 5.10 WNW 287° Once/3 years Soil Route 752 05 4.20 NNE 20° Once/3 years Sturgeon's Creek Marina 05A 2.04 N 11 ° Once/3 years Levy, VA 06 4.70 ESE 115° Once/3 years 10

TABLE 2-1 North Anna Power Station-2020 RADIOLOGICAL SAMPLING STATION DISTANCE AND DIRECTION FROM UNIT NO. 1 Collection Sample Media Location Station Distance Direction Degrees Frequency Remarks Bumpass, VA 07 7.30 SSE 167° Once/3 years End of Route 685 21 1.00 WNW 301 ° Once/3 years Route 700 (Exclusion Boundary) 22 1.00 WSW 242° Once/3 years "Aspen Hills" 23 0.93 SSE 158° Once/3 years Orange, VA 24 22.00 NW 325° Once/3 years Control Fish Waste Heat Treatment Facility 08 3.37 SSE 148° Semi-Annually (Second Cooling Lagoon)

Lake Orange 25 16.5 NW 312° Semi-Annually Control Food Products (Vegetation) Stagecoach Road 14B 1.22 NNE 40° Monthly if available or at harvest Route 614 15 1.37 SE 133° Monthly if available or at harvest Route 629/522 16 12.60 NW 314° Monthly if available or at harvest Control Aspen Hills 23 0.93 SSE 158° Monthly if available or at harvest "Historic Lane" 26 1.15 s 172 ° Monthly if available or at harvest 11

TABLE 2-2 North Anna Power Station SAMPLE ANALYSIS PROGRAM SAMf LE MEDIA FREQUEN!:Y ANALYSIS LLD REPQRT llNITS Thermoluminescent Dosimetry (TLD)

(84 TLDs) Quarterly Gamma Dose 2mR+/-2mR mRJstd. Month (12 TLDs) Annually Gamma Dose 2mR+/-2mR mRJstd. Month Airborne Radioiodine Weekly 1-131 0.07 pCi/m 3 Airborne Particulate Weekly Gross Beta 0.01 pCi/m 3 Quarterly (a) Gamma Isotopic pCi/m 3 Cs-134 0.05 Cs-137 0.06 2nd Quarter Sr-89 (b) pCi/m 3 Composite Sr-90 (b)

Surface Water Monthly 1-131 l(c) pCi/L Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Quarterly(a) Tritium (H-3) 2000 pCi/L 2 nd Quarter Sr-89 (b) pCi/L Composite Sr-90 (b)

River Water Monthly 1-131 l(c) pCi/L Gamma Isotopic pCi/L Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 Cs-134 15 Cs-137 18 Ba-140 60 La-140 15

  • LLDs indicate those levels to which environmental samples are required to be analyzed. Actual analysis of samples may be lower than the listed values.

(a) Quarterly composite of each location's samples are used for the required analysis (b) There are no required LLDs for Sr-89/90 (c) LLD for non-drinking water is 10 pCi/liter (d) LLD applied are those for water samples. However, since this is a semi-annual composite no LLD is applied for these nuclides due to their short half-lives.

12

TABLE2-2 North Anna Power Station SAMPLE ANALYSIS PROGRAM SAMPLE MEDIA FREOUEN~Y ANALYSIS LLD REPORT UNITS River Water Quarterly(a) Tritium (H-3) 2000 pCi/L 2 nd Quarter Sr-89 (b) pCi/L Composite Sr-90 (b)

Ground Water Quarterly Gamma Isotopic pCi/L (Well Water) Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 I-131 l0(c)

Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Quarter] y( a) Tritium (H-3) 2000 pCi/L 2 nd Quarter Sr-89 (b) pCi/L Sr-90 (b)

Aquatic Sediment Semi-Annually Gamma Isotopic pCi/kg (dry)

Cs-134 150 Cs-137 180 Annually Sr-89 (b) pCi/kg (dry)

Sr-90 (b)

Precipitation Monthly Gross Beta 4 pCi/L Semi-Annual Gamma Isotopic pCi/L Composite Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-95 30 Nb-95 15 I-131 (d)

Cs-134 15 Cs-137 18 Ba-140 (d)

La-140 (d)

Shoreline Soil Semi-Annually Gamma Isotopic pCi/kg (dry)

Cs-134 150 Cs-137 180 Annually Sr-89 (b) pCi/kg (dry)

Sr-90 (b)

  • LLDs indicate those levels to which environmental samples are required to be analyzed. Actual analysis of samples may be lower than the listed values.

(a) Quarterly composite of each location's samples are used for the required analysis (b) There are no required LLDs for Sr-89/90 (c) LLD for non-drinking water is 10 pCi/liter (d) LLD applied are those for water samples. However, since this is a semi-annual composite no LLD is applied for these nuclides due to their short half-lives.

13

TABLE 2-2 North Anna Power Station SAMPLE ANALYSIS PROGRAM SAMPLE MEDIA FREQUENCY ANALYSIS LLD REPORT UNITS Soil Once per 3 years Gamma Isotopic pCi/kg (dry)

Cs-134 150 Cs-137 180 Sr-89 (b) pCi/kg (dry)

Sr-90 (b)

Milk Monthly 1-131 pCi/L Monthly Gamma Isotopic Cs-134 15 Cs-137 18 Ba-140 60 La-140 15 Quarterly Sr-89 (b) pCi/L Sr-90 (b)

Fish Semi-Annually Gamma Isotopic pCi/kg (wet)

Mn-54 130 Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Food Products Monthly, if Gamma Isotopic pCi/kg (wet)

(Broadleaf available, or Cs-134 60 Vegetation) at harvest Cs-137 80 1-131 60

  • LLDs indicate those levels to which environmental samples are required to be analyzed. Actual analysis of samples may be lower than the listed values.

(a) Quarterly composite of each location's samples are used for the required analysis (b) There are no required LLDs for Sr-89/90 (c) LLD for non-drinking water is 10 pCi/liter (d) LLD applied are those for water samples. However, since this is a semi-annual composite no LLD is applied for these nuclides due to their short half-lives.

14

Legend For The North Anna Power Station Environmental Monitoring Stations Overview Maps Map Environmental Station Map Environmental Station Designation Identification Designation Identification 1 (a) 01,NE-5/37 7/8 C-7/8 IA 0IA,SE-13/45 1/33 N-1 /33 2 (a) 02,SSW-20/52 31/63 NNW-31/63 3 (a) 03,C-5/6 29/61 NW-29/61 4 (a) 04 3/35 NNE-3/35 5 (a) 05 7/39 ENE-7/39 SA (a) 0SA,N-2/34 9/41 E-9/41 6 (a) 06 ,ESE-12/44 11/43 ESE-11/43 7 (a) 07, C-1/2 17/49 S-17/49 8 08-Water, Fish, Sediment, 19/51 SSW-19/51 Shoreline Soil 21/53 SW-21 /53 9A 09A-Water sample, Sediment 23/55 WSW-23/55 11 11 -River Water, Sediment 14B 14B-Vegetation 16/48 SSE-16/48 15 15-Vegetation 14/46 SE-14/46 16 16-Vegetation 22/54 SW-22/54 21 (a) 21,WNW-27/59 26/58 W-26/58 22 (a) 22,WSW-24/56 28/60 WNW-28/60 23 (a) 23-SSE-15/47,Vegetation 32/64 NNW-32/64 24 (a)(b) 24,C-3/4 8/40 ENE-8/40 25 (c) 25-Fish 4/36 NNE-4/36 26 26-Vegetation 10/42 E-10/42 (a) Indicates air sample station, annual and quarterly TLD, Triennial soil.

(b) In Orange (c) In Lake Orange 15

SSW Legend

  • FIX@d E *ronme tal Mo
  • ring S!atio lLD Locations Scale - 318 inch = 235 fl Figure 1. North Anna Site Radiological Monitoring Locations 16

North Anna Environmental Map

- Fixed Environmental Sampling Location

- TLO Sampling

- Garden Residents

- Meat Animals Original O 1Q91 by ADC of Alexandri:i. Inc.* 6440 General Green W:xy.

Alexand1111, VA 22312. USED WITH PERMISSJO . No olher reproduction

'?:,a n1:>de without lhe w ritten perminion of ADC.

Cll3280G 17

North Anna Environmental Map

- Fi)(!ed Environmental Sampling Location

- TLD Sampling

- Garden Residents

- Meat Animals Origin:il O 1Q91 by :ADC ol Alsxandria.. Inc" M40 Gens r:il G r&en W:,.y, Alsx:indri a.. VA22312. USED WITH P ERMISSION. No oth&r rsproduction m:iy be m:lde wilhout the wril!Bn permisaion of ADC.

G83i?81E 19

3. ANALYTICAL RESULTS 3.1 Summary of Results In accordance with the North Anna Offsite Dose Calculation Manual (ODCM), a summary table of the analytical results has been prepared and is presented in Table 3-1. This data is presented in accordance with the format of the USNRC Branch Technical Position, "Acceptable Radiological Environmental Monitoring Program", Rev. 1, November 1979. The LLD listed value is taken from the ODCM. For radioanalytic analyses, the values listed in the columns indicated as "Mean/Range" include any results above the Minimum Detectable Concentration, MDC. Results are considered true positives when the measured value exceeds both the MDC and the 2E error. For TLDs the mean and range include all values.

A more detailed analysis of the data is given in Section 4 where a discussion of the variations in the data explains many aspects that are not evident in the Summary Table because of the basic limitation of data summanes.

21

RADIOLOGICAL ENVIRONMENTAL M ONITORING PROGRAM SUMMAR Y Page 1 of 8 RADIOLOCIAL ENVIRONMENT MONITORING PROGRAM

SUMMARY

NORTH ANNA NUCLEAR PO\IVER STATION, LOUISA COUNTY, VIRGINIA 202,0 Docket No. 50-3381339 2020 Medi mor lndicaor In cator Control Non-Routine Pathway is To ll.D* Locations Location v.ith Highest Mean Locations Reported Sampled Type umbe Me~ Distance Me.vi Mean Measurement (Units) (~) Number Direction (Range) (Range)

Direct Radiation Ganvna 254 2 4.1 (252/254) 29/61 0.52Mi. 7.1 (7/8) 3.7 (16/16) 0 (mR.std. Month) Dose (1.4-8.7) (6.J-8.7) (2.6-4.8)

(Sector Tl.Ds)

.. CY4, -7/B used for control locations Direct Radiation Gamma 32 2 2.9 (16116) C-112 7.3Mi. 3 .7 (BIS) 3.7 (16/16) 0 (mR.std. Month) Dose (1.5-6.8) SSE (2.5-6.8) (2.6-4.8)

(Pre-operationa TL.Ds)

    • CY4, -7/B used for control locations Direct Radiation Gamma 40 2 5.0 (4(}140) BPSP 0.37 Mi. 7.1 (818} 3.7 (16/16) 0 (mR.std. Month) Dose (2.9-8.1) fV10 ENE (5.9-8. 1) (2.6-4.8)

(Emergency Sector Tl.Ds)

.. C3/4, -7/B used for control locations Direct Radiation Ganvna 48 2 3.6 (44144) S A-23 0.93, i. 5 .1 (414) 3.1 {414) 0

,(mR.s d. Month) Dose (1.7-5.9) SSE (5.1) (2.5-3.8)

(Environmental TLDs)

Direct Radiation Gamm 12 2 5.5 (1 1/11) S A-23 0.93Mi. 6.8 (1/1) 5.1 (1/1) 0 (mR.std. Month) Dose (4.3-6.8) SSE (6.8) (5.1)

(Annual Tl.Ds)

Air Particu ate GR-B 676 0.01 12.9 (6231624) 01 5.10 i. 14-7(52/52) 14.7 (52/52) 0 (10e-J pQlm 3 ) (5.2-35.2) wtN-1 (7.3-34.1) (5.9--35.J)

GAMMA 52 BE-7 52 122.4 (48/'48) 04 5.10Mi. 133.0 (4/4) 135.6 (4/4) 0 (89.9-150.5) WNW (114.5-149.5) (1 28.5-154.2)

Cs-134 52 0.05 (01.48) A NIA NIA (0/4) 0 Cs-137 52 0.06 (01.48) A NIA NIA (0/4) 0 Sr-89 13 0.01 {Ol.48) A NIA NIA (0/4) 0 Srs9() 13 0.01 {0!48) A NIA NIA (0/4) 0 Air Iodine 1-131 676 0.07 (0!624) NlA NIA NIA (0152) 0 (10e-J pQlm 3 )

,. IJID identifed in ODCM

...C3/4r7/8 used as control locations 22

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 2 of 8 RADIOLOCIAl ENVIRONMENT MONITORING PROGRAM

SUMMARY

ORTH ANNA UCLEAR POWER STATION, LOUISA COUNlY, VI RGINIA 2020 Docket No. 50-3381339 2020 Medium or Indicator Indicator Control Noo-!Routine Pathway Analysis Total u.o* Locations Location with Highest Mean Locations Reported Number Mean Measurement SalJ1)1ed (Units)

Type GAMMA 0 Mean (Ralge} Number!

Distance Direction I Mean (Ralge) (R:Ilge)

K--40 0 NIA NIA NIA NIA 'A 0 CS-134 0 NIA NIA NIA NIA NIA 0 CS-137 0 180 A NIA NIA NIA NIA 0 Ra-226 0 WA NIA NIA NIA 'A 0 Th-228 0 A 'A NIA NIA 'A 0 lh-232 0 NIA NIA A NIA NIA 0 Sr-89 0 NIA NIA NIA NIA NIA 0 Sr-90 0 NIA NIA NIA NIA NIA 0

. ...Soil sampfes are obtained *emialJy.

Precipitation GR--8 12 4 3.4 (1 2/12) 01A 0.64 3. ( ff2/12) NIA 0 (pCiHi 'et) (1 .5-7.5) SE (1.5-7.5)

H-3 12 2000 (Qf12) NIA A NIA NIA 0 GAMMA 2 Be-7 2 (0/2) NIA A NIA NIA 0 2 15 (0/2) NIA NIA NIA 'A 0 Fe-59 2 30 (0/2) NIA NIA NIA NIA 0 Co-58 2 15 (0/2) NIA NIA NIA N/A 0 Co--60 2 15 (0/2) NIA NIA NIA NIA 0

  • LLD ' d.entifed in O[)()M 23

RADIOLOGICAL ENVIRONMEN TAL MONITORING PROGRAM

SUMMARY

Page 3 of 8 RADIOLOCIAL ENVIRONME MONITORING PROGRAM

SUMMARY

NORTH ANNA NUCL!EAR POWER STATION, LOUISA COUN1Y, VI RGINIA 2020 Docket No_50-338/339 2020 Medium or lndica or Q:introl Noo-Routine Pathway Analysis LLD* Locations LoC3i *ons Reported Sa~led Type Me..-. Mean ean Measurement (Units) (Range) Ntmber (R31Qe) (Raige)

Precipitati on (cont'd) Zn-65 2 30 (0/2) NIA NIA NIA 0

{pCil[itet)

Zr~95 2 30 (0/2) NIA NIA NIA NIA 0

~95 2 15 {Of2) NIA NIA NIA N/A 0 Cs-134 2 15 (012) NIA NIA N/A 0 Cs-137 2 18 (012) NIA NIA NIA 0 Ba-140 2 60 (012) NIA NIA NIA 0 La-140 2 15 (012) NIA NIA NIA N/A 0 1-131 2 10 (0/2) NIA NIA N/A 0 lh-228 2 (012) NIA NIA NIA 0 Fruits & Vegetables GAMMA 30 (pCV}(Q wet "'t ) Be-7 30 2007 (21124) 23 0.93M*_ 2414 (616) 1457 (516) 0 (518.2-5896) SSE ,(759.3-5896) (940.1-2114)

K-40 30 5259 (24124) 23 0_93Mi. 5641 (616) 4238 {6i'6} 0 (3288-12150) SSE (3508-12150) (3433-5431) 1-131 30 60 {0124) r>. NIA NIA (0!6) 0 Cs-134 30 60 (0124) NIA NIA (0!'6) 0 Cs-t37 30 80 (0124) NIA NIA (0!6) 0 Ra-226 30 1018 (1/24) 23 0.93ML mm(116) (0/6) 0 (1 018) SSE (1018)

  • LLD "dentifed i OOCM 24

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 4 of 8 RADIOLOCIAL. ENVIRONMENT MO ITORING PROGRAM SUMMAAY NORTH ANNA NUCLEAR POWER STATION, LOUISA COUNTY, VIRGINIA 2020 Docket No. 50-338/339 2020 Medium ,or Indicator Indicator Control Non-Routine Pathway Analysis To LLD* Locations Location with Hi~t Mean Locatioos Reported Type Number Distance Mean easurement Sa111>led

{Units)

Fnnts & Vegetables lh-228 30 Mean (Range) 121 .7 (7124)

Numberl Direction 23 0.93 Mi.

I Mean (Range) 187.7 (316)

(Range)

(0/6) 0 (oonfd) .(pCilk.g wet wt.) (32.47-229.J) SSE (145.6-229.J) lh-232 30 351.0 (2124) 23 0.93Mi. 351.0 (216) (0/6) 0 (236.3-465.7) SSE (236.3-465.7)

Well Water H.J 4 2000 (014;) NIA NIA NIA NIA 0

,(pCimter}

GAMMA 4

~ 4 15 (0/4) NIA NIA NIA NIA 0 Fe-59 4 30 (014) NIA NIA NIA NlA 0 Co-58 15 (014) NIA NIA NIA NIA 0 Co-a60 4 15 (014-) NIA NIA NIA NIA 0 4 30 (0l4-) A NIA N/A 0 Zr-95 4 30 (0/ 4 NIA NIA NIA NIA 0 Nl).!95 4 15 (014) NIA NIA NIA A 0 1--131 4 10 (014) NIA NIA NIA NIA 0 Cs-134 4 15 (0/4) NIA NIA NIA N/A 0 Cs-137 4 18 (014) NIA NIA NIA N.IA 0 B:r140 4 60 (014) NIA :NIA NIA NIA 0 La-140 4 15 (014) NIA NIA NIA N/A 0

  • LLD "dentifed in ODOM 25

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 5 of 8 RADIOLOCIAL ENVIRONMENT MONITORING PROGRAM

SUMMARY

ORTH ANNA UCUEAR POWER STATION, LOUISA COUN'TY, VI RGINIA 2020 Docket No. 50-3381339 2020 Mediumor Indicator Indicator Control Non-Routine Pathway Analysis To LLD* Locations Location with Highest Mean Locations Reported Type Measurement Sar71>led (Units)

Well Water (cont'd) Sr-89 Number 1

Mean (Range)

NIA Distance Nmiberl Direction NIA I Mean

(~)

NIA Mean (Rmge)

NIA 0 (pCil/itetJ Sr-90 1 (0/1) NIA NIA NIA NIA 0 River Water H-3 4 2000 2858 (414) 1 5.80~ . 2858 (414) A 0 (pCil/itefj (1390-3960) SE (1390-3960)

GAMMA 12 Mn-54 12 15 (Q/12) NIA A NIA NfA 0 Fe--59 12 30 (Q/12) A A NIA NfA 0 Co-58 12 15 {Q/12) NIA 'A A NfA 0 Co-60 12 15 {QI 2) NIA NIA NIA NfA 0 Zn-65 12 30 {Q/12) 'A 'A IA NIA 0 Zr-95 12 30 (Q/12) NIA NIA NIA NIA 0 95 12 15 (Q/12) NIA NIA NIA 0 1~131 12 1 (Q/12) NIA NIA NIA 'A 0 Cs-134 12 15 {0112) NIA NIA NIA NfA 0 Cs-137 12 18 (0l12) NIA NIA NIA NlA 0 Ba-140 12 60 (0/12) NIA A NIA NfA 0 La-140 12 15 (Q/12) NIA NIA NIA NfA 0

" LLD identifed in ODOM 26

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 6 of 8 RADIOLOCIAL ENVIRONMENT MONITORING PROGRAM

SUMMARY

NORTH ANNA NUCLEAR POWER STATION, LOUISA COUNTY, VI RGINIA 2020 Docket No, 50-338/339 2020 Medium or Indicator Indicator Control Noo-'.Routine Pathway Analysis Total LLD* Locations Location with Hlghest Mean Locations Reported Safl1)1ed Type Number Mean Distance Mean Measurement

{Units)

River Water (cont'd) Sr-89 (Range}

(0/ 1)

Number!

NIA Direction NIA I (Range)

NIA Mean (Raige)

NIA 0 (pCiliiter)

Sr-90 (011) NIA NIA NIA NIA 0 SW"faceWater H-3 8 2000 2793 (414) 08 3.37 ~ . 2793 (414) (0/4) 0 (pCi/iiter) (20.30-4030) SSE (2030-4030)

GAMMA 24 m,-54 24 15 (0112) NIA NIA NIA (0/12) 0 Fe-59 24 30 (0112) NIA NIA NIA (0!12) 0 Co-58 24 15 (Qf1 2) NIA NIA NIA (Ol12) 0 Co-60 24 15 (0112) NIA NIA NIA (0/12) 0 Zn-65 24 30 (Qf12) 'A NIA NIA (0/12) 0 Zr-95 24 30 {0/12) Nl NIA NIA (0/12) 0

~95 24 30 (Qf12) NIA NIA NIA (0/12) 0 1~131 24 1 (Qf12) *~ NIA NIA co.r12) 0 Cs-134 24 15 (0/12) 'A NIA NIA (0l12) 0 Cs--137 24 18 (0/12) NIA NIA NIA (Ol12) 0 Ba-140 24 60 (0/12) NIA NIA NIA (Ol12) 0 La-140 24 15 (0112) NIA NIA NIA (0/12) 0

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 7 of 8 RADIOLOCIAL ENVIRONMENT MONITORING ROGRAM

SUMMARY

NORTH ANNA UCLEAR POWER STATION, LOUISA COUNTY, VIRGINIA 2020 Docket No. 50-3381339 2020 Medium or Indicator Indicator Control Non-Houtine Pattrwy Analysis To LLD* Locations Location with H"ghest Mean Locatioos Reported Saf11)1ed Type Numbe Mean Distance Mean Mean Measurement (Units) (Range) Number Direction {Range) (Ralge)

Surface Water (cont'.d) Sr-89 2 (011) NIA NIA NIA (0/1) 0

.(pCilfflet)

Sr-90 2 (0,f1t NIA NIA NIA (0!1) 0 Sediment Silt GAMMA 6

,(pCVkg dty wt) K-40 6 10900 (414) 11 5.80 f . 20710 (2/2) 12945 (2/2} 0 (762.2-20790) SE (20630-.20790) (12930-12960)

Cs-134 6 150 (OJ..) 'NIA 'A NIA (012) 0 Cs-137 6 180 (0/4) NIA NIA NIA (0!'2) 0 R.a-226 6 (0/4) NIA NIA NIA (0!2) 0 Th-228 6 665.0 (3!4) 11 5.B0 ~ . '917.0 (212) 436.4 (2/2) 0 (161-1071) SE (763-1071) (165.1-707.6)

Th-232 6 713.4 (2/4) 11 5 .80 ~ . 723.4 (212) 734.2 (1/2) 0 (685.5-741.2) SE (685.5-741.2) (734.2)

Sr-89 3 (012) NIA 'A NIA (0/1) 0 (Annu.ally)

Sr-90 3 (0/2) NIA NIA NIA (0/1) 0 (Amually)

ShofelineSOi l GAMMA 2 (pCil.kgdrywt.) K-40 2 1062 (1/2) 08 3.37 Hl62 (112) A 0 (1062) SSE (1062)

Cs-134 2 150 (0/2) NIA NIA NIA NIA 0 Cs-137 2 180 ,(0/2) NIA NIA NIA NIA 0 R.a-226 2 (0/2) NIA NIA NIA NfA 0 Th-228 2 (0/2) NIA NIA NIA NfA 0

  • UD . dentifed in OOCIM 28

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

Page 8 of 8 RADIOLOCIAL ENVIRONMENT MONITORING PROGRAM

SUMMARY

NORTH ANNA UCLEAR POWER STATION, LOUISA COUNTY, VI RGINIA2020 Docket No. 50-338/339 2020 Medium or lncficaor Indicator Control Non-!Routine Pathway Analysis Total LLD* Locations Location Highest Mean Loca1 *oos Reported Sampled Type Number Mean Distance Mean Mean Measurement (Units) {Range) Number Direction (Range) (Range )

Shorel ine Soil (cont'd) lh-232 2 (012) NIA NIA NIA NfA 0

,(pCVkg dfy wt.)

Sr-89 (0/1) 'A NIA NIA NfA 0 (Annu,ally)

Sr-90 (0/ 1) NIA A NIA NfA 0 (Amnlly)

!Fish - Other GAMMA 8

,(pC.Vkg wet .i.t) K-40 8 1370 (414) 08 3.37 ~* 1370 (414) 1468 {414) 0

.(872.4-1566) SSE (872.4--1 566} (892.8--1951) f/D-54 8 130 (0/4) 'A NIA NIA (0/4) 0 Fe-59 8 260 (014) A NIA NIA (0.14) 0 Co-58 8 130 (014) 'A NIA NIA (0.14) 0 Co-60 8 130 (0/4) A NIA NIA (014) 0 Zn-65 8 260 (014) .4. NIA NIA (0l4) 0

~ 134 8 130 (0/4) NIA 'A NIA {0l4) 0

~137 8 150 (0/4) NIA NIA NIA {0l4) 0

  • LLD identifed in OOOM 29

3.2 Analytical Results of 2020 REMP Samples Radiological analyses of environmental media characteristically approach and frequently fall below the detection limits of state-of-the-art measurement methods. The data reported in the following tables are strictly counting statistics. The reported error is two times the standard deviation (2cr) of the net activity. Unless otherwise noted, the overall error (counting, sample size, chemistry, errors, etc.) is estimated to be 2 to 5 times that listed. Results are considered true positives when the measured value exceeds both the MDC and the 21: error.

Because of counting statistics, negative values, zeros and numbers below the Minimum Detectable Level (MDL) are statistically valid pieces of data 1. For clarity of this report only detectable results are presented. TBE's analytical methods meet the Lower Limit of Detection (LLD) requirements given in Table 2 of the USNRC Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program", (November 1979, Revision 1) and the North AnnaODCM.

Data are given according to sample type as indicated below.

1. Gamma Exposure Rate
2. Air Particulates, Gross Beta Radioactivity
3. Air Particulates, Weekly I-131
4. Air Particulates, Quantitative Gamma Spectra
5. Air Particulate Strontium
6. Soil
7. Precipitation
8. Cow Milk
9. Food Products and Vegetation
10. Well Water
11. River Water
12. Surface Water
13. Bottom Sediment/Silt
14. Shoreline Soil
15. Fish 1

Analytical results are handled as recommended by HASL ("Reporting ofAnalytical Results from HASL, " letter by Leo B.

Higginbotham) and NUREG/CR-4007 (Sept. 1984).

30

TABLE 3-2 QUARTERLY GM1MA. EXPOSURE RATE (mR/Std. Month) +/- 2 Sigma F irstQua er second Quarter Third Quarter Fourth Q uarter 12/30l2019- 3131/2~ 6/30/2020- 9/30f2020- Quarterly Avera~

Station 3131/2020 6/30/2020 9/30/2020 12/29/2020 (+/-) 2S.D.

---4J ___,

N-1 5.8 3.5 4 .3 4.6 (+/-) 1.4 N-33 5.1 4.2 42 5.0 N-2 3_5 2.0 2.5 3. 1 2.8 (+/-) 1.0 N-34 3_3 2.6 2.6 3.2 E-3 7.8 4.7 5.4 6.2 6. 1 (+/-) 2.1 E-35 7.2 5.3 5.6 6.5 E-4 4_9 3.4 4 .6 4.3 4.2 (+/-) 1.2 E-36 5.0 3.8 3_5 4.4 NE-5 6.3 2.8 3.8 5_5 4.6 ( +:/-} 2.3 NE-37 5.4 3.8 4 .2 4 _9 NE-6 4.1 21 2.8 3_4 3.3 ( +/-) .4 NE-38 4.0 3.2 2.7 3.7 ENE-7 6.5 4.4 52 5.1 5 _4 (+/-) 1.7 ENE-39 6.6 4.6 4.8 5.6 EN83 3.2 1.5 1.7 20 2 *1 (+/~) 1.2 ENE-40 25 1.8 2.2 21 89 6.0 3.9 42 4L8 4.8 ( +/-) 1.4 E-41 5.6 42 4.5 5.0 E-10 5_5 27 3.7 3.8 3.8 (+I-) 1.8 E-42 4.6 3_3 3.0 3_9 ESE-11 5 _5 3_5 4.0 4!_6 4.4 (+/-) 1.5 ESE-43 52 3.8 3.7 4.6 ESE-12 5_5 3.1 4.0 4-4 4.5 ( +I-) 2.0 ESE-44 4.8 4.0 4.1 6.2 SE-13 6.0 3.2 42 4.1 4,4 ( +/-) 20 SE-45 5_5 3.4 3.7 4.6 SE-14 7-7 5.5 5.8 5_9 6.3 (+I-) .6 SE-46 7.0 5.9 6.0 7.0 SSE--15 .5.6 3.8 4 .4 4.6 4.6 (+I- .5 SSE--47 5.6 4.1 3.8 5.1 SSE-16 3_9 1.8 2.9 3_1 2.8 (+}-} 1.4 SSE--48 3_5 20 2..5 3.0 S-17 5.8 2.9 4 .7 5c3 4.6 (+I-} 2.0 S-49 5_4 3_9 3.9 5 _3 "Average of *colloca ecJ TLDs 31

TABLE 3-2 QUARTERLY GAMMA. EXPOSURE RATE (mRJStd. Month):! 2 Sigma Firstaua er Second Quarter Third Quarter Fourth Quarter 12/30/201*~ 3131/202(}- 6/31l/20W- 9/30/2020- Qua erty Average*

Station 3/31/2020 6130/2020 '9!30/2020 12/29f2020 (+I -) 2 S .D.

---2..5 ___,

S-18 32 1.4 2.3 23 ( +/-) U S-50 29 1-9 2.2 24 SSW-19 7.9 ~i8 5.7 6.1 6-3 { +/-) 1-7 SSW-51 6.9 5.6 5.6 6.6 SSW-20 3.0 1-6 2.1 26 2.2 {+/-) 1.0 SSW-52 2.6 1-8 1.7 24 S\IV-21 4.3 3.1 3.4 3.9 3.6 ( +1-} 0.9 SW-53 4.1 3.0 3.7 3.6 S\IV-22 5.5 3.9 3.5 5.0 4-3 ,(+/-) 1.4 SW'-54 5.0 3.6 4.1 4.1 WSW-23 5.1 3.4 (a} 4.5 4.5 { +/-} 1.2 WSW-55 52 4.3 4.5 4.4 WSW-24 5,3 3.3 3.4 4.3 4.2 {-+:1-} 1.8 WSW-56 5.9 4.0 4.1 3.6 W-25 8.4 6.1 5.7 7.3 6.8 ( +/-) 1.9 W-57 7.8 6.3 6.2 6.6 W-26 3.7 2.4 2.6 28 2.7 ,(+/-} 1.3 W-58 3.5 23 2.4 1.8 N-27 3.8 22 2.6 3.1 3.0 (+/-} 1.2 W-59 3.9 23 2.8 3.0

-28 3.4 22 2 ..S 3.0 29 ( +/-} 1.0 W-fJO 3.6 25 2.5 32 NV\1-29 8-7 6.3 6.5 7.2 7.1 { +/-} 1.7 NW--61 7.7 6.5 6.9 {a)

NW-30 27 1.5 1.5 1.9 1.9 ( +/-) 1.0 NW--62 2.6 1.7 1.6 1.7 5.6 3.0 3.4 4.5 4.0 { +/-) 1.9 5.0 3.3 32 4.2 4.7 28 3.2 3.6 3.7 (+/-} 1.4 4.6 3.0 3.5 3.8 Mean 4.1 {+/-} 3.0 (a} TlD was m* *og and unable to be analyzed.

  • Average of collocated TI.Os 32

TABLE3-2 QUARTERLY GAMMA EXPOSURE RATE

{mR/std. IVionth) +/- 2 Sigma First Quarter Second Quarter Third Quarter Fourth ,Quarter 12/30/2019- 3/3112020- 6,130/2020- 9/30/2020- Quarterly Average*

station __________

3/31/2020_______ _.

6.130/2020 9/30/2020 12/29/2020 ____ {+/-) 2 S.D. ____ _

C-1 3.8 ----------------

2.5 -----------------

6.8 *----------------*

4.0 3.7 (+/-) 2.8 C-2 4 .2 2.5 2.8 3.2 e-3** 4.5 2.6 3.0 3.7 3.5 (+/-) 1.4 C-4... 4.4 2.7 3.5 3.6 C-5 2.9 1.7 1.9 2.2 2.2 (+/-) 1.0 C-6 2.7 1.5 2.0 2.3 C-J- 4 .2 3.1 3.3 4.2 3.8 {+/-) 1.2 C-8"* 4.1 3.2 3.5 4.8 Indicator Mean 2.9 {+/-) 2.6 Control Mean 3.7 (+/-) 1.3 EPSA-01* ... 5.6 3.7 3.9 5.3 4.6 {+/-) 1.6 EPSA-02*** 5.5 3.8 42 4.9 EPSF-03..... 4 .9 3.7 3.5 3.9 4.1 ,(+/-) 1.1 EPSF-04..... 5.0 3.7 4.1 4.2 EPSR-05*- 6.8 4.9 4.6 5.4 5.5 {+/-) 1.6 EPSR-Oo"** 6.6 52 5.0 5.1 EPSJ-Or** 5.0 2.9 3.0 4.4 3.9 {+/-) 1.6 EPSJ-08*** 4.4 2.9 3.9 4.3 EPSP-09*- 8.1 6.2 6.0 7.6 7.1 {+/-) 2.0 EPSP-10"... 8.1 6.6 5.9 8.0 Mean 5.0 (+/-) 2 .8

  • Average of collocated TLDs

... Control Location

--Emergency Plan Tills.

33

TABLE3-2 QUARTERLY GAMMA EXPOSURE RATE (mR/Std. Month)+/- 2 Sigma First auarter Second Quarter Tllird Quarter Fourth Quarter 12/30/2019- 3/31~ 6'30l2020- 9/30/2020- Ouarterty Average* Annual Station 3131/2020 613012D20 9/30l2020 12J29J2020 (+/-)2S.D. n.o STA-01 5.3 3.2 3.8 4.8 4.3 (+/-) 1.9 6.5 STA--02 3-4 1.8 t .8 3.0 25 (+/-) 1.6 4.6 STA-03 3.5 1.7 2.0 3.1 26 (+/-) 1.7 4.3 STA--04 3.4 1.7 1.9 3.4 26 (+/-) 1.9 4.5 STA--05 3.7 3.0 2.7 3-8 3.3 (+/-) 1.0 5.3 STA--05A 3.8 4.4 2.5 3.8 3.7 (+/-) 1.6 5.0 STA--06 5.3 4.0 4.4 5.2 4.7 (+1-) 1.3 6.3 STA--07 4.0 24 27 4.5 3-4 (+/-) 2.1 5.5 STA-21 3-7 28 2.7 29 3.0 (+/-) 0.9 5.2 STA-22 4.5 3.6 3.4 4.3 4.0 ,(+/-) 1.0 6.4 STA-23 5.9 .4 4.7 5.5 5.1 (+/-} 1.3 6.8 STA-24tt 3.8 25 2.9 3.4 3. t (+/-} 1.2 5.

Mean Indicator Locatioos 3.6 (+/~) 1.8 5.5 (+/-} 1.8

  • Average of collocated ll.Ds

... Control 34

TABLE 3--3 AIR PARTI CUlATES GROSS BETA RADIOACTIVITY (1cr' pCi/m3 )

LOCATIONS PERIOD ENDING 01 02 03 04 05 06 07 21

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

07/07/2.0 13.90 2.860 17.00 3.040 16.60 3.020 19.70 3.1 70 9.1 00 2.600 13.70 2 .860 15.20 2.940 16.80 3.020 07/15/20 12.30 2.280 9'410 2.110 12.20 2.230 13.50 2.320 13.10 2.310 10.20 2.150 15.60 2.460 12.50 2.290 07/2.1/2.0 16.40 3.040 15.30 3.040 17.50 3.250 23.10 3.510 18.10 3.220 20.20 3.330 22.40 3.420 19.60 3.240 07/2.8/20 13.60 3.110 14.20 3.100 14.20 3.120 17.20 3.240 16.90 3.230 11.80 2.970 14.80 3.130 16.00 3.220 08/05/20 12.80 2.390 14.10 2.450 13.00 2.390 15.40 2.520 12.60 2.380 11.80 2.330 16.20 2560 10.50 2.260 08/12/2.0 16.80 2.920 16.90 2.910 20.40 3.100 19.50 3.050 19.00 3.010 17.50 2.930 12.00 2.640 17.90 2.970 08119/20 14.80 2.580 12.40 2.450 15.50 2.630 16.60 2. 690 13.00 2490 14.60 2.580 16.20 2.670 14.90 2.590 08/2.6/20 11.30 2.550 17.80 2.910 16.90 2.870 21.00 3.080 21 .30 3.090 17.50 2.900 17.10 2.880 19.80 3.030 09/02/2.0 9.780 2.420 11 .10 2 ..560 12.60 2.650 14.60 2.760 12.30 2.630 13.60 2.700 11.20 2.560 10.50 2.520 09/08/2.0 10.20 2.440 12.50 2.530 16.70 2.800 14.70 2.680 13.80 2.610 12.80 2.550 11.40 2.460 11.80 2.490 09/16/2.0 11.90 2.440 12.40 2470 15.10 2.620 15.60 2.640 12.40 2.470 11.00 2.390 13.90 2.550 12.40 2.470 09/22/2.0 9.1 50 2.970 14.00 3.250 17.30 3.530 20.20 3.580 17.30 3.440 12.40 3.170 13.00 3.190 15.10 3.310 09/30/20 19.60 2.830 20.40 2.860 22.20 2.950 21 .90 2.930 21 .00 2.890 21.60 2.910 22.80 2970 18.50 2.770 10/06/2.0 11.80 2.850 11.90 2.860 14.40 3.010 13.20 2.940 13.00 2930 11.40 2.830 13.40 2.960 13.40 2.950 10/13/20 12.60 2.700 8.330 2.440 12.00 2.650 14.90 2.810 12.80 2.690 10.10 2.530 12.80 2.690 12.80 2.700 10/20/20 16.10 3.000 12.10 2.800 19.50 3.180 14.60 2.940 15.00 2.970 15.90 3.010 17.70 3.090 18.40 3.1 20 10/27/20 8.170 2.490 1240 2.780 6.750 2.360 12.90 2.730 8.930 2.530 6.660 2.390 7.640 2.450 8.320 2.500 11/03/20 12.90 2.690 12.20 2 .650 15.40 2.870 15.20 2.840 11.50 2.600 12.60 2.670 13.80 2.740 13.40 2.720 11/10/20 H.50 2.830 13.30 2.600 16.10 2.750 17.50 2.830 16.30 2.770 19.30 2.930 20.70 3.000 11.70 2.500 11/17/2.0 13.50 2.750 13.80 2770 14.90 2.830 16.70 2.920 16.90 2.910 13.40 2.730 15.50 2.860 14.50 2.810 11/2.4120 16.60 3.140 13.80 3.000 14.00 3.010 20.00 3.300 14.90 3.070 21 .1 0 3.370 17.80 3.200 16.20 3.120 12/02/2.0 19.80 2.720 16.20 2.540 22.50 2850 15.60 2.510 18.00 2.630 18.30 2.650 19.90 2.730 21 .10 2.790 12/09/20 8.780 2.240 7.290 2.140 5.370 2.000 7.300 2.140 8.720 2.240 8.350 2.210 8.180 2.200 8.470 2.21 0 12115/20 22.40 3.520 27.50 3.760 26.40 3.710 34.10 4.050 27.80 3.760 23.40 3 ..560 33.80 4.040 28.90 3.830 12/2.2120 13.70 2.570 9.470 2.310 16.60 2.730 14.70 2.630 11.90 2.500 12.00 2.480 10.40 2.370 11.90 2.460 12/2.9/20 12.90 2.630 10.70 2.480 13.70 2.600 16.30 2.760 16.80 2.800 9 .590 2.400 1250 2.580 13.80 2.660 Mean 11.87 2.601 12.06 2.613 13.43 2.691 14.72 2.758 13.18 2.673 12.47 2.634 13.40 2.68 13.28 2.683 36

TABLE3-3 AIR PARTI CULATES GROSS BETA RADIOACTIVITY (10" pCi/m3)

LOCATIONS PBRIOO ENDI G 22 23 24* 01A 05A

*- - - ~,-)-- (+/-) - - - - -(+/-) - ( +/-) - --7.,:r--

01/08/20 9 . 110 1 .890 9 .930 1 .950 13.80 2.170 10.20 1.960 12. 10 2 .070 01/14/20 9 .370 2 .540 11 .20 2660 12.30 2.710 8 .590 2.480 9 .460 2.540 01/21/20* 17.60 2 .750 19.70 2 .860 19.40 2 .860 14.30 2.560 16.30 2.690 01/28/20 12.40 2 .730 1290 2.760 13.00 2 .760 9 .470 2.560 16.70 2 .970 02/04120 6.820 2 .450 9.560 2 .610 10.40 2 .660 8 .230 2.540 6 .670 2 .440 02/11120 8 .140 2 .210 5.760 2 .050 9.010 2 .250 8-600 2250 8210 2210 02119120 14.20 2 .400 10.80 2200 13 .90 2 .390 10.60 2.190 12.20 2 .300 02/26120 m.7o 2 .640 19.30 3 .110 17 .00 2 .990 14.40 2.850 16.20 2 .950 03/03120 10.70 2 .870 11 .80 2 .'940 10.30 2 .830 9.740 2.800 13.40 3. 030 03110/20 7 .940 2 .160 10.00 2.300 9.370 2260 10.40 2.330 10.10 2310 03117/20 14.00 2.740 13.60 2.720 12.90 2670 10.60 2 .550 1250 2640 03124/20 11 . 10 2 .530 10.50 2 .500 13.00 2 .650 10.60 2 .500 12.20 2 .600 03/31/20 9 .400 2.410 10.90 2 .500 11.70 2 .540 9 .130 2 .400 11 .80 2 .550 04/07/20 7.760 2 .510 9 .990 2 .650 8 .050 2 .540 6 .360 2.410 5 .800 2 .400 04/14/20 13.60 2 .720 12.30 2.650 9.860 2 .500 11.70 2.620 13.10 2 .680 04/21120 17.70 2 .910 13.50 2.690 18.00 2 .950 13.10 2 .660 12.90 2 .670 04/28/20 8.050 2 .500 8 .080 2.500 7.460 2 .450 5.510 2 .340 8 .160 2500 05105120 8 .600 2 .290 7 .490 2 .220 10.40 2.410 8 .450 2.280 10.10 2 .390 05/12/20 8 ..380 2290 8.360 2290 9 .120 2310 8.000 2.270 10.70 2410 05120/20 10.40 2 .300 7 .540 2.140 1270 2440 12.70 2.420 1290 2.450 05126/20 5 .620 2.210 8 .290 2 .410 7 .620 2360 8 .230 2 .410 8 .230 2410 06102/20 5 .600, 2310 7 .390 2.430 8 .100 2.470 5 .920 2 .330 8.170 2. 480 06'09/20 14.40 2840 17.70 3 .010 16.70 2950 17.80 3 .020 15.20 2880 06116/20 9 .670 2510 8 .940 2470 11 .70 2 .630 5 .240 2230 7.230 2 .360 06/23120 7 .440 2 .540 7.360 2 .530 5.'9 40 2.460 7.690 2.560 6.870 2 .520 06/30/20 11 .30 2 .700 13.00 2.790 15.20 2.890 15.1 0 2 .910 17 .90 3 .030 "Control Station 37

TABLE ~3 AIR PARTICULATES GROSS BETA RADIOACTIVITY (10"'3 pCi/m3)

LOCATIONS PBRIOD ENDING 07/0712.0 1 3.60 22

(+/- )

2 .840 18.801 23

- - ---(+/- )

3.120

16. 10 24*

(+/- )

3 .000

- 14 .90 01A

(+/-)

2.910 16.80 05A

- - -741--

3 .030 07/151'20 1 3.00 2 .320 12.801 2 .300 13.80 2 .340 11 .10 2..210 9.930 2 .130 07121/20 16.30 3.110 19.301 3230 18.80 3 _320, 16,.40 3 .050 116.90 3 .150 07128120 11.80 3 .010 1260 3 .050 14.70 3.080 0 .20 2..'9 40 18.70 3 .310 08(05/2.0 1 .10 2 .290 11.70 2.320 1 2 .90 2 .390 0 .70 2.270 10.70 2.270 08(112/20 13.40 2.740 17.80 2 .970 26.50 3 .370 12.30 2 ..670 18.20 2.970 081119/20 11 .30 2 .370 15.30 2.610 117.80 2.780 14.10 2.540 18.00, 2 .780 08126l20 16.40 2 .840 20.90 3.080 20.30 3 .040 19.80 3.030 20.60 3,. 060 09{02/20 6.940 2 .250 1 3 .50 2.700 1 4 . 10 2.740 11 .00 2 .490 11 .90 2 .610 09l08/20 i11.60 2 .530 13.00 2 .570 9 .570 2.320 11.20 2 .510 15.30 2.710 09/16120 9.080 2 .280 14.90 2 .600 15.00 2610 9 .370 2 .300 11.001 2 .390 09/22120 11.80 3.120 13.10 3 .200 18.50 3 .510 15.30 3 .330 16.00 3 .370 09130120 20.20 2.850 22.30 2 .950 21.70 2.910 16.30 2.660 20.70 2.870 10,06120 12.50 2 .890 1250 2.890 15.80 3.080 11 .00 2 .800 11 .70 2 .850 10f13/20 10.80 2.600 11.90 2 .640 14.ilO 2 .760 13.50 2 .750 14.20 2.760 0/20J20 14.90 2 .940 12.30 2-810 16.20 3.040 15.50 2 .970 18.40 3 . 140 10/27120 9.2'il0 2 .550 9.800 2 .580 115.30 2 .890 8,_140 2.480 7 .940 2 . 470 11,03120 'il0.40 2.540 12.10 2.650 11 4 .90 2 .800 10.40 2.551{) 1 5 .30 2.820 11l110/20 15.50 2 .720 14.50 2 .1660 21 .00 3 .020 11.50 2 .490 16.20 2.7160 11117/20 15.40 2.860 14.50 2.810 11 '9 . 10 1

3 . 030 15.10 2.840 13.00 2.710 111124/20 117.0 0 3.160 17.00 3 .1 60 118.70 3 .250 17.70 3 .190* 17 .50 3 .200 12/0212{]1 116.20, 2540 24.20 2.930 23.60 2 ~900 20.30 2 .750 19.30 2.700 1210912{]1 7 _5901 2160 7 .200 2 .1311 10.80 2380 '9 .080 2 .260 8.2001 2.200 112115/20 26.301 3.710 33.30 4 .020 35.30 4.080 27.50 3.760 35.20 4.070 12/Z2J'20 10.60 2.380* 15.20 2660 16.00 2.710 15.00 2.640 13.90 2.590 12/29J20 12.30 2 .570 14.90 2.7'il0 15.90 2 .770 6..30 2.800 12.80 2 .590 Mean 11 .83 2.598 13,.29 2.679 14.68 2.754 12.011 2 ..608 13.53 2 . 692 Mean all lnd icatior locations 12.92 2 .659

"'Cont rol station 38

TABLE 34 AIRBORNE IODINE (10..;, pCilm3)

LOCATIO S PERIOIJ ENDING 0 02 03 04 05 06 07 21 01{08/20 < 17.88 < 17.91 < 15.28 < 1R05 < 17.93 < 27.51 < 27.51 < 27.47 0 1/14!20 < 1R90 < 18 ..82 < 18.82 < 11.41 < 14 .36 < 14.54 < 14.48 < 14.48 01121/20 < 8.687 < 8.702 < 8.702 < 8.702 < 6.820 < 5.309 < 11.30 < 11.30 01/28/20 < '19.77 < 19.77 < 19.77 < 9.238 < 19.77 < 27.66 < 27.66 < 27.66 02104/20 < 10.56 < 25.14 < 25.18 < 25.18 < 25.18 < 12.74 < 1274 < 12.76 0211 1120 < 15.28 < 1821 < 1821 < 18.17 < 18.08 < 20.09 < 20.23 < 2023 02119/20 < 30.77 < 30.91 < 13.13 < 30.87 < 31 .06 < 6.144 < 13.09 < 13.07 02126/20 < 18.17 < 27.12 < 27.1 2 < 27.17 < 27.17 < 24.30 < 11 .36 < 24.34 03103/20 < 18.42 < 9.429 < 17.99 < 18.20 < 18.42 < 15.33 < 15.37 < 15.37 03H0f20 < 15.90 < 15.90 < B.61 < 16.12 < 15.95 < 30.55 < 30.50 < 12.79 03117/20 < 11.18 < 13.34 < 13.34 < 13.34 < 13.25 < 20.69 < 20.83 < 20.83 03124!20 < 17.70 < 17.70 < ff70 < 17.70 < 8.595 < 9.587 < 18.71 < 18.71 03131120 < 15.65 < 36:98 < 36.17 < 36.48 < 36.98 < 21.47 < 25.66 < 25.66 04/07120 < 38.31 < 38.58 < 16.56 < 39.20 < 38.72 < 19.66 < 19.66 < 19.66 04114/20 < 7.566 < 17.95 < 17.95 < 17.95 < 17.82 < 13..29 < 13.34 < 13.36 04121120 < 24.34 < 24.52 < 24.52 < 26.64 < 12.54 < 26.83 < 26.64 < 26.64 04f28/20 < 17.05 < 21 ..90 < 21 .90 < 21.90 < 21.90 < 25.46 < 25.46 < 25.46 osm5/20 < 43.05 < 18 ..18 < 43.05 < 43.05 < 43.05 < 18.32 < 10.33 < 18.32 05/12!20 < 18.03 < 17.94 < 17.94 < 11.49 < 2231 < 22.38 < 22.50 < 22.50 05/20!20 < 34.93 < 35.09 < 35.09 < 38.83 < 16.39 < 39.01 < 38.89 < 38.83 05126/20 < 12.14 < 28:94 < 28.94 < 28.94 < 29.00 < 21 .02 < 20.98 < 20.98 06102120 < 19.37 < 19.37 < 19.37 < 19.37 < 19.37 < 21 .66 < 27.83 < 27.83 06109120 < 10.35 < 24.60 < 24.60 < 24.60 < 24.56 < 13.93 < 13.93 < 13.93 06116/20 < 33.97 < 14.30 < 34.09 < 34.09 < 33.97 < 19.87 < 1126 < 19.97 06f23/20 < 18.21 < 1821 < 18.21 < 19.09 < 19.19 < 9282 < 19.09 < 19.09 06130!20 < 6.406 < 11.32 < 11 .32 < 11.32 < 1128 < 15.55 < 15.44 < 6.746 39

TABLE 3-4 AIRBORNE IODINE (10.;:i pCi/m3)

LOCATIO S PERIOD 02 03 04 06 07 ENDING

- - - -01

, 05 21 07/07/20 < 34.07 < 14.36 < 34.25 < 34.19 < 3425 < 34.09 < 14.30 < 33.97 07/1 5/20 < 34.19 < 34.03 < 33.07 < 20.84 < 21 .07 < 21.10 < 2123 < 11.98 07121/20 < 25.01 < 25.73 < 26.71 < 15.60 < 36.73 < 36.73 < 36.36 < 35.77 07/28120 < 16.44 < 19.28 < 19.45 < 19.24 < 19.28 < 20.50 < 20.54 < 20.83 08/05/20 < 7.847 < 18.68 < 18.68 < 18.68 < 18.68 < 21.26 < 21.26 < 2129 08/12/20 < 20.09 < 23.85 < 23.94 < 23.89 < 23.68 < 22.90 < 23.03 < 23.07 08/19120 < 33,47 < 33.71 < 33.77 < 33.65 < 1424 < 10.42 < 24.71 < 24.67 08126120 < 1627 < 38.73 < 38.79 < 38.73 < 38.66 < 36.11 < 36.17 < 36.17 09102/20 < 34.76 < s5.81 < 35.81 < 35.74 < 15.04 < 17.97 < 42.77 < 42.69 09/08/20 < 33.75 < 32.52 < 32.52 < 16.52 < 3924 < 39.32 < 39.40 < 39.40 09116/20 < 22.33, < 10.19 < 22.40 < 22.40 < 22.37 < 20.06 < 1026 < 20.09 09122/20 < 28.44 < 28.32 < 12.39 28..38 < 28.50 < 15.75 < 37.4'1 < 37.41 09130/20 < 36.15 < 36.09 < 36.09 < 29.87 < 29.78 < 29.82 < 29.82 < 14 .45 10/06120 < 19.87 < 23.90 < 23.85 < 23.85 < 23.95 < 19.54 < 13.10 < 19.46 10/13120 < 10.83 < 25.65 < 25.65 < 25.74 < 25.51 < 20.37 < 20.41 < 20.51 10/20/20 < 25.29 < 25.51 < 25.51 < 25.51 < 11.67 < 14.45 < 14.40 < 14.33 10/27/20 < 19.59 < 16 ..SO < 19.22 < 19.361 < 19.59 < 9.677 < 20.01 < 20.01 11/03/20 < 16.18 < 16.12 < 13.77 < 16.32 < 16.09 < 13.33 < 13.35 < 13.38 1111 0!20 < 22.36, < 22.36 < 22.36 < 22.36 < 11.46 < 13.16 < 31.31 < 31.31 1111 7/20 < 29.45 < 12.37 < 29.51 < 29.51 < 29.25 < 10.23 < 24.56 < 24.56 11124120 < 29.56, < 29.51 < 29.46 < 29.46 < 12.44 < 17..22 < 17.10 < 17.07 12/02/20 < 42.17 < 42.17 < 42.H < 29.59 < 29.63 < 29.59 < 29.63 < 12.45 12/09120 < 37.29 < 37.29 < 37.35 < 37.35 < 15.67 < 28.47 < 28.43 < 28.38 12/15/20 < 19.30 < 8.111 < 19.34 < 19.34 < 19.18 < 20.22 < 20.38 < 20.38 12fZll20 < 33.94 < 34.00 < 34.00 < 34.00 < 2323 < 18.77 < 40.88 < 40.88 12f29/20 < 24.32 < 35.91 < 34.99 < 35.35 < s5.79 < 51.74 < 51.83 < 21 .85 40

TABLE 3-4 AIRBORNE IODINE (10"3 pCi/m3 )

LOCATIONS PERIOD ENDING 22 23 24'" 0 1A 05A OH08120 < 27.51 < 11.55 < 17.20 < 17.16 < 17.18 0111 4120 < 23.06 < 23.06 < 10.67 < 23.06 < 23.06 0 1/21120 < 11 .30 < 11.30 < 7.984 < 7.915 < 7.984 01128/20 < 27.66 < 11.60 < 14.22 < 14.22 < 14.22 02/04120 < 12.76 < 6.517 < 32.56 < 32.56 < 32.56 02111120 < 16.95 < 2023 < 15.47 < 15.66 < 15.50 02/1 9/2.0 < 13.03 < 13.05 < 4 .925 4.872 < 4.925 02/26120 < 24.34 < 24.34 < 20.36 < 20.36 < 20.33 03103120 < 15.33 < 15.30 < 22.12 < 22.16 < 2221 0311 0/20 < 30.55 < 30.55 < 28.86 < 28.86 < 28.9 1 03117120 < 20.83 < 8.736 < 15.12 < 15.15 < 15.04 03124120 < 18.71 < 18.71 < 15.57 < 15.46 < 15 .54 03/31/20 < 25.66 < 25.62 < 24.04 < 24.29 < 24.1 2 04107/20 < 19.66 < 19.69 < 2128 < 21.02 < 2 120 0411 4/2.0 < 13.36 < 6.462 < 13.22 < 13.38 < 13.22 04121120 < 24.22 < 24.26 < 24.48 < 10.96 < 24.44 04/28/20 < 11.65 < 25.46 < 21 .16 < 25.34 < 25.34 05105/20 < 18.32 < 18.32 < 16.51 < 16.51 < 16.51 0511212.0 < 17.17 < 17.14 < 16.91 < 17.17 < 9.548 05120120 < 33.95 < 34.01 < 34.32 < 14.22 < 3427 05126/20 < 11 .83 < 20.98 < 33.71 < 33.71 < 33.71 06/02/20 < 27.83 < 27.83 < 26.64 < 26.64 < 26.64 06/09120 < 7.878 < 13.95 < 27.71 < 27.91 < 27.76 06/16/20 < 19.90 < 19.94 < 35.90 < 35.84 < 35.84 06/23120 < 17.71 < 91.047 < 17.87 < 17.75 < 17.84 06/30J20 < 15.53 < 15.50 < 5.197 < 10.28 < 10.1 9

~Control station 41

TABLE:3-4 AIRBORNE IODINE (10.;i pCi/m3)

LOCATIONS PERIOD ENDING 22 23 24* 01A 05A 07/fJl/20 < 33.91 < 33.97 < 25.94 < 25.71 < 25.89 07/15'20 < 1215 < 12.09 < 6.746 < 1215 < 12.04 07/21/20 < 19.67 < 19.23 < 2025 < 9.704 < 19.71 07/28/20 < 9.494 < 20.83 < 10.45 < 10.84 < 10.62 08105/20 < 21.29 < 10.87 < 6.145 < 6.155 < 6.155 08112120 < 39.23 < 39.16 < 16.20 < 39.23 < 38.68 08119/20 < 24.54 < 24.58 < 26.95 < 26.44 < 26.81 08126/20 < 36.11 < 15.17 < 24.73 < 24.86 < 24.81 09/02/20 < 41 .59 < 42.77 < 27.73 < 26.68 < 27.63 09/08120 < 43.98 < 4247 < 17.74 < 44.17 < 42.30 09/16120 < 20.03 < 20.06 < 22.05 < 2205 < 22.09 09/22/20 < 37.41 < 37.41 < 36.24 < 36.09 < 36.24 09/30/20 < 25.06 < 25.06 < 20.87 < 25.10 < 24.98 10/06,(2() < 19.46 < 19.46 < 20.35 < 20.35 < 20.43 10/13/20 < 9.366 < 20.44 < 52.36 < 52.91 < 52.27 10/20/20 < 14.30 < 14.40 < 23.75 < 23.34 < 23.62 10/27/20 < 1'9.97 < 19.94 < 21 .69 < 21 .65 < 21.73 11,03/20 < 13.38 < 8.962 < 12.06 < 1214 < 12.06 11110/20 < 31 .26 < 31.20 < 19.95 < 19.81 < 19.92 11(17/20 < 24.60 < 24.64 < 31 .87 < 3214 < 31.87 11/24/20 < 17.07 < 17.07 < 22.25 < 2217 < 22.28 12/02/20 < 22.43 < 22.43 < 18.68 < 2236 < 22.40 12/09/20 < 28.43 11.90 < 25.35 < 25.17 < 2521 12/15120 < 20.34 < 13.63 < 20.23 < 20.40 < 20.23 12122/20 < 40.88 < 40.88 < 44.93 < 44.62 < 44.93 12f29/20 < 52.01 < 51.83 < 15.05 < 15.10 < 14:97

~control station 42

TABLE 3-5 AIR PARTI CULATES (10...J pCi/m3)

GAMMA SPECTRA - QTR 1 {12/30/19 - 03/31/20}

LOCATION Be-7 Cs-134 Cs-137

~- - - -(+/-)-- - - -- ------,

01 102.00 20.850 < 12740 < 1.3220 02 11120 20.000 < 12510 < 1.0400 03 138.00 26.020 <12460 < 1.1960 04 125.00 21.070 < 0 .9'146 < 0.9800 05 117.70 18.780 < 0.9537 < 1.0950 06 119.00 20.770 < 0.7340 < 0.9847 07 116.20 22.190 < 1.3610 < 1.4680 21 12 1.70 19.890 < 0.7541 < 0.8546 22 124.30 27.360 < 1.6840 < 1.6480 23 124.00 22.420 < 1.3330 < 1.2990 24" 130.70 24.750 < 1.4700 < 1.3800 01A 105.10 18.880 < 0.8936 < 0.6651 05A 103.70 22.130 < 0.9673 < 0 .9605 GAi SPECTRA AND STRONTIUM 89/90- QTR 2 (03/31/20 - 06/30/20)

LOCATION Be-7 Cs-134 Cs-137 Sr-89 Sr-90

  • ------ ---------- (+/-)

01 108.70 18.1 20 < 0.9101 < 0.9516 < 6.6000 < 4.0100 02 121 .90 21.080 < 1.2130 < 0.9409 < 7.6100 < 4.3600 03 150.50 26.900 < 1.2890 < 1.2090 < 7.8600 < 3.0500 04 142.80 24.050 < 1.4510 < 1.2610 < 7.2200 < 4.0800 05 120.10 9.860 < 0 .9012 < 0.9184 < 8.0000 < 4.6300 06 131.30 22.250 < 1.3260 < 1.3620 < 6.0200 < 3.4100 07 131.60 27.170 < 2.0490 < 1.4630 < 7.1800 < 3.2800 21 145.40 20.090 < 1.3110 < 1.0290 < 8.0400 < 4.6000 22 131.80 22.200 < 1.1 160 < 1.0070 < 6.8100 < 3.3700 23 134.50 21.200 < 0.8744 < 1.0080 < 6.8200 < 4.7*900 24" 129.00 26.350 < 1.3830 < 1.2140 < 6.0900 < 4.0900 01A 126.20 21 .4 10 < 1.3650 < 1.0820 < 7.8000 < 28200 05A 127.50 20.950 < 1.0920 < 0.9178 < 6.8800 < 4.8000

.. Control Location 43

TABLE3-6 Soil (pCi/kg dry wt)

COLLECTION LOCATION DATE Sr-89 Sr-90 K-40 Cs-134 Cs-137 Ra-226

  • ----- *-----* (+/-) (+/-) (+/-)

01 02 03 04 05 06 rrr Soil sampled on Triennial basis. Not required in 2020 21 22:

23 24*

05A Mean OOLLECTJON LOCATION DATE Th-228

(+/-)

Th-232

(+/-}

01 02 03 04 05 06 07 21 22 23 24*

05A Mean

~ Control Location 45

TABLE 3-7 Precipitation (pCi/L)

LOCATION 01A COLLECTION DATE Gr-B H-3 Rainf all (inches)

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

01 /28/20 2.6 1.1 < 911 2.94 02/26/20 2.4 .2 < 711 3.08 03131/20 3.3 1.2 < 719 1.63 04/28/20 3.2 1.1 < 764 5.19 05{26/20 7.5 1.9 < 877 2.06 06/30/20 3.0 1.3 < 726 5.80 07128/20 2.1 .0 < 757 3.50 08/26/20 2.2 1.2 < 677 9.75 09/30/20 5.5 1.4 < 733 5.35 10/27/20 4.9 1.3 < 935 2.88 11 /24/20 .5 1.0 < 692 8.82 12/29/20 2.3 1.1 < 912 8.80 Mean 3.4 1.2 Total 59.80 46

TABLE 3-7 Precipitation (pCi/L.}

LOCATIO 01A COLLECTION DATE Be-7 Mn-54 Fe-59 Co-58 Co-60 Zn-65 06/30/20 < 53 ..86 < 2.025 < 15.62 < 4.128 < 1.694 < 4.424 < 8.440 12129/20 <51.10 < 1.959 < 15.12 < 3.924 < 1-774 < 4.319 < 7.881 Mean COLLECTION Cs-134 Cs-137 Ba-140 l-'131

--*DATE

- --- l>J95 La-140 Th-228 06/30/20 < 4.960 < 1.'922 < 1.747 < 1603 < 559.1 < 14150 < 3.878 12/29120 < 5.078 < 2.009 < 1.765 < 1356 < 473.5 < 10720 < 3.434 Mean 47

TABLE3-8 MILK (pCi/L)

COLLECTION LOCATION DATE K-40 Sr-89 1-1 31" Cs-13P Ba-140" La-140"

""Milk samples could not be obtained in 2020 due the lack of dairy farms within the sampling ar ea.

48

TABLE 3-9 Food and Vegetation (pCiilkg wet wl)

LOCATION 148 COLLEC 0 DATE Be-1

(+1- )

K-40

(+1- )

- 13r*

- Cs-134.. Cs-137.. Th-222

(+/-)

05.112/20 1Q62 4 18_2 53Q9 805_0 < 44_70 < 40_gg < 44_64 Q0.23 57.49 06lll9!20 1604 4 n.6 52.QO 806..8 < JQ.00 < 51-:30 < 41tl2 89.41, 63.55 07115.r20 < *4 16..2 6065 877_8 < 21.QO <41-76 < 38a04 < 65.55 0811 2/20 1437 377.9 448D 665_0 < 47.70 < 35..20 < 28.4 8 < 58.35 09!08!20 3135 4 30. 1 4!5(l5 762..0 < 45..50 < 21l'.Q7 < 37.98 <6 .65 10!13120 17 1Q 173.6 3624 3 14.5 < 5 1.20 < t 6.117 < 16 a37 < 22.24 Mean um 375,_5 4009 705'.2 89.82 60.52 LOCATION 15 COLlECTIO DATE Be-7

(+/-)

K-40

(+I-)

- 13.1

-..- - Cs-134,. C s-137** -222

( /-)

05.112/211' 1383 387.2 4679 801..2 < 37..50 < 50. < 46.10 76.72 69.63 06.l'IIIQr.ocJ, 1542 427.8 6[)59 1097 < 47.7111 < 58.92 < 44.41 < 67.@D 07115.r.ocl* < 348.1 7139 841.6 < 4 1.00 < 2 9'.7'1 <31.03 < 48,46 08112/20 Q31.2 284.7 tl 139 683,0 < 35.10 < 29.84 < 21 .89 < 4 1.38 (19/08,12()1 1438 357.4 5731 875.9 < 28.QO < 3R34 < 32.74 < 51.26, 1 ll113,1'2(1, 2403 1!58. 3288 26'3.7 < 36.30 < '1 5*. 38 < 14.09 < 22. 13, 11\/Je.311 1557 323.2 5506 76[)_4 71H2 69.63 LOCATION 16" COLLEC 0 DATE Be-7 K-40 ll-13 1u C s-134° C s-137 ..

(+/- ) ( +/- }

05.112/20 940.1 347.5 *425 1 735.7 < 46.00 < 36.43 < 31.15 1 06JOQl20 1060 370.7 543 1 785.8 < 35.10 < 36.81 < 32..38 07115/'20 < 4 12.0 3433 702.7 < 4Q.QO < 38.25 < 46,. 96 08112/20 17 14 324.8 4210 631 .6 < 56..50 < 25.68 <2R4Q 09JUB.i'20 1459 318.2 4003 652.6 < 36..5111 < 37. Hl < 33..24 10/13/20 2 114 159.0 4022 298.5 < 45.QII < 12.76 < 12.44

/Jean 1457 3 04.0 ,4238 634.2

  • Control Station

.. L LD i den1ifed in O DCM 49

TABlE 3-9 Food and Vegetation (pCil'kgwet wt)

LOCATIO 23 COLLECTIO DATE K-40 11-131" C s-134' "

- - -B e-7-(+I-

-I - (+/~)

C s- 137"" Ra-226

(+I- )

Th-228

  • -------* (+/-)

Th-232

(+/ -)

05.11 2120 1732 4 56!0 4 884 8422 < 54.BO < 46.44 < 48.52 < 1383 18B. 1 76.84 < 24 6.6 Ofll'OQl'20 1083, 3'Sl.7 41163 8 13, 5 < .ffi.40 < 52..55 < 4'6.0 1 < 1158 22Q.3 82.19 236.3 88.60 0,711512(} 75Q.3 323.2' !5657 563,3 < 42li0 < 35,:ig < 32. 16, < 706,.0 < 6 1.13 < 1.4 2.Q 08.112/20, 18Q7 337.B 12 150 10 6-1 < 4Q.60 < 37.89 < 36,78 < 752.6* < 57.71 < 177.3 0Qltl8."20' 3 118 444.7 3583 545.2 < 50.60 < 34.6 1 < 33. 19 < 830.9 < 70.24 < 154.3 10.!1 3/20 5BQ6, 3 1Q.6, 3!i08 37,B, 6 < 4 0.10 < 28.8Q < 23.811 10 18 !533.7 145.6 38.70 465.7 200..2 Me an 2414 3732 564 700.6 1018 533.7 187.7 65.9*1 35 t .O 144.4 LOCAT IO 26 COl.l ECTION ATE Be-7 K-40 11-13, ,. C s-134 .. C s- 137..

-- Th-228 --

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

05112120 4082 5 16.3 4 642 7 40.3 < 52.40 < 3 1.44 < 4238 < 84.4 1 06.10Ql'20 19 11 4 07 ~5 3427 6Ql.2 < &II.BO < 39.48 < 40.02 < 7 5.0 3 0711 5{20 < 337~5 832 8Q3.2 < 21.40 < 43..01 < 37.61 < 66.89 8.!12/'20 5 182 111tl.5 4D2 1 396..4 < 33.Hl < 22. 1!5 <21.49 < 38.41 09J08.l'20 40716 522J8 !5546 821.3 < 44.10 < 31>.68 < 35,38. < 63.65, 1Dl13/'20 13 15 63.7 3915 3 LS < 55.7D < 16.85 < 16.47 32.47 21.28 Mean 2380 361.4 4118D 642.7 32.47 2 1.28 B e-7 K-40 1- 13 1.. C s-134" C s-137"* Ra-,226 Th-228 h-232

( /-) ( +/- )

(+/- ) *-------* (+I--) (+/ -)

AD I dicabr lMea 21JQ7 35Q.O 52:59 702.2 10 18 533.7 121.7 58.53 35 1.0 t44.4

.. LILD *dentifed in ODCM 50

TABLE3-10 WB..LWATER

,(pCi/L)

LOCATION COLLECTION DATE H-3 ... Sr-89 Sr-90 Mn-54 Fe-59 _______,

Co-58 Co-60 Zn-65 01A 03/31120 < 723 (a) (3) < 5. 8-0 *< 11 .4 < 4.82 < 5. 19 < 9.3S 0613012.0 < 727 < 3 .76 < 0.880 < 5 .63 < 11.2 < S.57 < 5.25 < 9.48 09/30/20 < 732 (a ) (a) < 5.72 < 12.5 < 523 < 5.75 < 13.3 1.212912.0 < 911 (a) (a) < 5.19 < 11.1 < 5.42 < 6. 17 < 11.3, Mean COLLECTl:ON LOCATIO DATE Zr-95 b-95 1-131 Cs-134 Cs-137 Ba-140 ~140 01A 03/3112.0 < 8.54 < 6.20 < 9.19 < 5.36 < .94 < 27.5 < 8.76 06/30120 < 9.57 < 7.49 < 9.57 < 5.69 < 4.95 < 26.4 < 9.83 09/30120 < 10.4 < 8 .73 < 9 .64 <628 < 6.15 < 26.5 < 102 12/29120 < 9.88 < 7.64 < 9.87 < 6.02 < 5 .98 < 28. 1 < 9.56 Meari (a) Sr-89/90 analyses performed on the second quarter sample.

51

TABLE3-11 River Water

~pCilL)

L0CATIO 11 OOLLECTION Sr-'90 1\111-54" Fe-59"" Zn-65~

DATE H-3

(+/-)

Sr-89

- - -Co-58"

, --- -Co-60" 01/14/20 (a) (b) (b) < 2..546 < 5,_449 < 2.577 < 3.186, < 5.000 02111/20 '(a} ,( b) (b) < 4.815 < '9.979 < 5.425 < 5.142. < 12.47 03/17/20 1390 554.0 (b) (b) < 5.562 < 14.74 < 5.726 < 6.710 < 15.26 04/14/20 (a) (b) (b) < 5.158 < 12.28 < 5.468 < 6.804 < 9.546 05112/20 {a) (b) (b) < 7.339 < 16.84 < 6 .632 < 7.522: < "17.33 061'16/20 2700 616.0 < 4.300 < 0.8~ < 5.334 < 111!5 < 5.684 < 5.938, 1

< 11.11 07115/20 (a) (b) (b) < 4.836 < 10.99 < 4.247 < 6.366 < 10.15 08112/20 ,( a) 1(b) (b) < 5.9n < 13.20 < 6.647 < 6.378 < 13.35 09116/20 3960 658.0 (b} (b) < 6.555 < 11 .87 < 6.691 < 5.715 < m. 27 10/13/20 ,( a) (b) (b) < 3.799 < 7.892 < 4.340 < J.618, < 9.427 11ttt7l20 (a) (b) (b) < 5.099 < 11.58 < 4.411 < 5.697 < 12.04 12/15120 3380 643.0 (b) (b) < 6.444 < 11.86 < 5 .145 < 4.923, < 13.50 Mean 2858 617.,8, Nb-95" Zr-9511 1-13111 CS-134* CS-13-r Ba-140" La-140" 01114120 < 2.492: < 4:158 < 0.555 < 2..466 < 2..647 < 9.439 < 2 ..641 02/11120 < 5.258 < 7.659 < 0.742 < 5.625 < 5.002 < 22..53 < 8291 03/Hl20 < 6..297 < 13c69 < 0.602 < 5.970 < 5.299 < 24.33 < 7.055 04/14/20 < 6.417 < 11. 14 < 0.776 < 6.005 < 5.220 < 22.63 < 9.845 05112/20 < 7.504 < 10.77 < 0.1691 < 7.785 < 7.018 < 16.28 < 11.27 061'16/20 < 5.091 < 11 .35 < 0.764 < 7.104 < 5.512 < 27.82 < 10.33 07/15120 < 6.264 < 8.051 < 0.647 < 5.692 < 5.912 < 22..80 < 10.61 08112/20 < 6.248 < 13. 29 < 0.687 < 5.642 < 9 .. 127 < 21.91 < 7.498, 09116/20 < 5.988 < 11 . 49 < 0.697 < 5..465 < 7.394 < 22..72 < 7.855 10/13/20 < 5.076 < 8.127 < 0.749 < 4 ..585 < 4.587 < 17.72 < 6.431 11117/20 < 5.807 < 8.780 < 0.798 < 4.986 < 6,.. 510 < 27.43 < 7.905 12/15l'20 < 5.650 < 11.02 < 0.937 < 6.387 < 6,.962 < 25.48 < 9.699 Mean

.. LLD "dentified in ODCM.

(a) Tritimi analyses on quarter1y composite.

(b) Sr-89/90 performed on 2nd quarter composite s pie.

52

TABLE 3-12 Surface Water (pCi/l)

LOCATI 08 OOWECTION DATE H-3 Sr-89 Sr-90 !Vn-54* Fe-Sir Co-58,*

(+/-)

- ---------, *-------- Co-60*

- - -Zn-65*

01114/20 (a) (b) (b) < 2422 < 5.668 < 2.431 < 3.189 < 4 .636 02/11/20 (a) (b) (b) < 4201 < 11 .35 < 3.851 <4.969 < 9.621 03117/20 2840 613.0 ,(b) (b) < 6.249 < 11.51 < 6.071 < 4.718 < 11.72 04/14/20 ,Ca) (b) (b) < 4.127 < 8-884 *< 4.226 < 3.613 < 7.665 05/U/20 (a) (b) (b) < 5.252 < 9.613 < 6.139 < 6.588 < 1021 06/16/20 2270 596.0 < 3.690 < 0.658 < 6.648 < 13.70 < 6.233 < 6.776 < 13.32 07115/20 (a) ,(b) (b) < 5.544 < 11.71 < 5.469 <4.623 < 12.32 08/12/20 (a) (b) (b) < 6.084 < 7.23;1 < 5.899 < 5c993, < 10.34 09/16/20 4030 648.0 (b) (b) < 5.616 < 11.80 < 4.153 < 6.061 < 11.93 10/13/20 ,(a) (b) (b) < 4.069 < 9.895 < 4J)82 < 3.969 < 8 ..501 11117/20 ,(a) ,( b) (b) < 4.933 < 10.37 < 4.732 < 5.607 < 10.84 12115!20 2030 578.0 (b) (b) < 4.646 < 12.17 < 6.058, < 5:903 < 9.778 Mean 2793 608.8 N~95"" Zr-95" 1-131 .. Cs-134* CS,.:13P Ba-140 ,_ __ La-140* --

01H4/'20 < 2.517 < 4.372 < 0.623 < 2609 < 2711 < 10.19 < 3.455 02/11/20 < 4.884 < 7.79f3. < 0.773, < 6,.000 < 5.454 < 18.98 < 7.051 03117/20 < 5.268 < 9.943 < 0.750 1 < 8.161 < 4.406 < 21.24 < 8.262 04/14/20 < 4.738 < 7.343 < 0.635 < 4.122 < 4.504 < 20.45 < 6 ..669 05/12/20 < 5.931 < 10.45 < 0.658, < 4,979 < 5.838 < 20.75 < 6.370 06/16/20 < 6.533 < 12:.98 < 0.736, < 5.143 < 6.034 < 28.92 < 8.263 07115/20 < 5.692 < 9.622 < 0.744 < 6.575 < 5.346 < 23.87 < 7.666 08/12/20 < 4.516 < 1244 < 0.598 < 7.302 < 6.160 < 22.99 < 9.615 09/16/20 < 6.301 < 9.573 < 0.892 < 7.896 < 6.647 < 2287 < 5.557 10/13/20 < 5.036 < 7.533 < 0.740 < 5.515 < 4.395 < 18.77 < 7.851 11117/20 < 5.927 < 9.992 < 0.675 < 6.835 < 6.7'91 < 28.50 < 7.411 12/15/20 < 6.101 < 9.052 < 0.826 < 6.563 < 6.811 < 24.06 < 9.807 Mean "LLD *oontified in ODCM.

(a) Tritim, analyses on quarterty ,composite.

(b) Sr-89/00 pertormed on 2nd quarter composite sample.

53

TABLE 3-12 Surface Water (pCVL)

LOCATION 09A**

COLLECTION DATE H-3 Sr-89 Sr-90 Mn-54* Fe-59* Co-58* Co-60* Zn-65*

01/16/19 (a) (b) (b) < 1.307 < 3.314 < 1.428 < 1.306 < 2.350 02/12/19 (a) (b) (b) < 3.794 < 11 .12 < 5.068 < 6.440 < 11.46 03/13/19 < 753 (b) (b) < 3.222 < 8.306 < 4.120 < 3.910 < 7.583 04/16/19 (a) (b) (b) < 3.456 < 7.925 < 4.225 < 3.646 < 6.652 05/14/19 (a) (b) (b) < 2.573 < 5.487 < 2.835 < 3.431 < 5.603 06/11/19 < 828 < 4.650 < 0.758 < 6.376 < 8.262 < 4.934 < 5.437 < 10.71 07/17/19 (a) (b) (b) < 4.396 < 11 .45 < 5.265 < 5.120 < 11 .53 08/14/19 (a) (b) (b) < 6.222 < 10.17 < 4.763 < 5.1 88 < 15.29 09/17/19 < 784 (b) (b) < 5.088 < 12.48 < 4.144 < 5.101 < 13.13 10/15!19 (a) (b) (b) < 7.119 < 14.93 < 6.577 < 7.227 < 12.60 11/13{19 (a) (b) (b) < 1.836 < 4.260 < 1.961 < 2.066 < 4.138 12/17/19 < 959 (b) (b) < 3.501 < 12.13 < 2.654 < 6-236 < 14.23 Mean Nb-95* Zr-95* 1-131* Cs-134* Cs-137* Ba-140* La-140*

01/16!19 < 1.591 < 2.558 < 0.920 < 1.426 < 1.352 < 15.12 < 4.279 02/12/19 < 5.248 < 10.20 < 0t27 < 6.339 < 6.397 < 25.33 < 5.721 03/13/19 < 3.483 < 6.383 < 0. 84 < 4.686 < 3.659 < 19.15 < 6.904 04/16/19 < 3.348 < 5.333 < 0.525 < 4.025 < 3.893 < 17.74 < 6.793 05/14/19 < 2.476 < 4.640 < 0.747 < 3.091 < 3.145 < 11 .53 < 3.436 06/11/19 < 5.392 < 8-609 < 0.617 < 4.666 < 5.112 < 22.09 < 6.113 07/17/19 < 4.726 < 11 .43 < 0.811 < 5.187 < 5.749 < 21 .24 < 8.688 08/14/19 < 5.806 < 9.608 < 0.581 < 5.970 < 6.801 < 28.24 < 9.577 09/17/19 < 6.692 < 9.242 < 0.491 < 5.139 < 6.245 < 22.22 < 7-200 10/15/19 < 6.689 < 11 .73 < 0.912 < 8.376 < 7.736 < 26.26 < 11 .17 11/13/19 < 2.008 < 3.329 < 0.774 < 1.958 < 2.114 < 9.835 < 3.632 12/17119 < 6.919 < 8.168 < 0.778 < 5.073 < 6.693 < 22.36 < 5.873 Mean

    • Control location (a) Tritium analyses on quarterly composite (b) Sr-89/90 performed on 2nd quarter composite sample.

54

TABLE3-13 sediment Silt (pCifkg dry wl}

COLLECTION LOCATI O DATE Sr-.89 Sr-90 K-40 Cs-134 Cs-137 Rac226

---- ---* (+I-)

  • - - - ---~

08 03130/20 (a) (a) 1419 736.0 < 64.21 < 55.99 < 1193 09A* 03130/20 (a) (a) 12960 1634 < 103-2 < 77.92 < 1418 11 03130/20 (a) (a} :m630 1885 < 90.82 < 73.05 < 1375 08 10/14120 < 446.0 < 40.30 762.2 439.8 < 55.15 < 51 .51 < 1046 09N 10/14120 < 535,0 < 43.90 12930 1249 <48.n < 38.36 < 997.1 11 10/14120 < 630.0 < 44.30 20790 1773 < 80.98 < 66.98 < 1407 Indicator Mean 10900 1208 Control Mean 12945 1442 COLLECTION LOCATION DATE Th-228 (+I-)- Th-232

(+/-)

08 03130/20 < 109.1 < 313.4 09.A* 03130/20 707.6 143.3 734.2 179.3 11 03130/20 763.0 94.93 685.5 209.8 08 10/14/20 161.0 66.89 < 211 .5 09A* 10/14/20 165.1 63.45 < 221.1 1 10/14/20 107ff 106.3 741.2 181.9 tncficator Mean 665.0 89.37 713.4 195.9 COntrol Mean 436.4 103.4 734.2 179.3 (a) Sr-.89190 analyses prefonned annuaDy.

  • control location, Background location 55

TABLE 3-14 Shoreline Soil (pCilkg dry wl)

LOCATIONS COLLECTION LOCATION DATE Sr-39 Sr-90 K-40 Os--134.. Cs-137* Ra-226

(+I-)

08 03/30/20 (a) (a) < 1240 < 4 2.02 < 11 04 08 10/14/20 < 659 .0 < 46.00 1062 667.9 < 54.98 < 1143 Mean 1062 667.9 COLLECTION LOCAT ION DATE Th-228 Th-232 08 [l31JW20 < 89.9 1 08 10114/20 < 103.4 Mean o- L LD rdentifred *01'1 ODCM (a) Sr-89/90 analyses performed annually.

56

TABLE3-15 fi~_h (pCiJkg etwt.)

COLLECTION LOCATION _ Fish Type . DATE K-40 11-54* Fe-59" Co-58" Co--60'" Zn-65"

(+/-)

08 (3) 05113/20 1566 782.3 < 83.12 < 182-2 < 103,3 < 78 .75 < 207.8 (b) 05113/20 1506 854.3 < 56.86 < 117.4 < 72.98 < 72..89 < 119.7 (a) 1 1/03/20 1534 742.6 < 37.31 < 8.8.97 < 5225, < 54.62 < 94.62 (b ) 1 110 3120 872.4 547.4 < 48.27 < 58.76 < 48 .45, < 40.94 < 91 .34 25"" (a) 05113/20 1659 1082 < 71 .20 < 193,.8 < 93 .38 < 70.53 < 195.8 (b) 05113/20 1951 70 .5 < 65.53 < 136.7 < 55.44 < 60 .76 < 127.4 (3) 1 1106/20 1371 730.6 < 68 .86 < 125.8 < 6920 < 6S27 < 161.8

{b) 1 1124120 892.8 562.0 < 52.46 < 101.3 < 47.95, < 48.88 < 98.06 Mean *141 9, 750 .2 Indicator Mean 1370 731 .7 Control ean 1468 766.8 COLLECT ION LOCATIO DATE Cs.-134" Cs-137" 08 (a) 05113/20 < 98.95 < 105.2 (b) 05113/20 < 61.10 < 61.98 (a) 1 1103/20 < 41 .78 < 58.64 (b) 1 1103/20 < 4 0.75 < 47. 12 25"" (a) 05113/20 < 85.71 < 76.77 (b) 05113/20 < 74.62 < 6 0.10 (a) 1 1/06/20 < 68.6 6 < 60.81 (b) 1 1124/20 < 46 ,91 < 5 0 .27 ean fn dicator e n Control Mean

-control s fion,

{a) Non-bottom dwelling species. of gamefis .

(b) Bottom dwelling species of fish .

57

4. DISCUSSION OF RESULTS Data from the radiological analyses of environmental media collected during 2020 and tabulated in Section 3, are discussed below. Except for TLDs, Teledyne Brown Engineering analyzed all samples throughout the year. The procedures and specifications followed for these analyses are as required in the TBE quality assurance manuals and laboratory procedures. In addition to internal quality control measurements performed by each laboratory, they also participate in an Interlaboratory Comparison Program. Participation in this program ensures that independent checks on the precision and accuracy of the measurements of radioactive material in environmental samples are performed. The results of the Interlaboratory Comparison Programs are provided in Appendix B.

The predominant radioactivity detected throughout 2020 was that from external sources, such as fallout from nuclear weapons tests and naturally occurring radionuclides. Naturally occurring nuclides such as Be-7, K-40, Th-228 and Th-232 were detected in numerous samples. Th-228 & Th-232 results were variable and are generally at levels higher than plant related radionuclides. In the past, Cs-137, a plant related nuclide, has been detected in soil and aquatic sediment samples at levels corresponding to levels associated with fallout from nuclear weapons tests.

The following is a discussion and summary of the results of the environmental measurements taken during the 2020 reporting period.

4.1 Gamma Exposure Rate A thermoluminescent dosimeter (TLD) is an inorganic crystal used to detect ambient radiation. TLDs are placed in two concentric rings around the station. The inner ring is located at the site boundary, and the outer ring is located at approximately five miles from the station. TLDs are also placed in special interest areas, such as population areas and nearby residences. Additional TLDs serve as controls. Ambient radiation comes from naturally occurring radioisotopes in the air and soil, radiation from cosmic origin, fallout from nuclear weapons testing, station effluents and direct radiation from the station.

The results of the analyses are presented in Table 3-2. Figure 4-1 shows the historical trend of TLD exposure rate measurements. Control and indicator averages indicate a steady relationship. Two dosimeters made of CaF and LiF sensitive elements are deployed at each sampling location. These TLDs replaced the previously used CaSO4:Dy in Teflon TLDs in January 2001. The dose with the replacement TLDs is lower than that of the previously used TLDs. This will continue to be monitored.

58

9.0 ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

8.0 - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -

~ Environmental TLD 2.0 + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1.0 + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - sectorTLD 0.0 N '<t '<t '<t '<t

~I ~C: ~I

<J:) 00 N <J:) 00 0 N <J:) 0 N 00 I

Q'I I

Q'I I

Q'I I

8 I 0

I 0

I 0

9 .-t .-t .-t .-t I

00

.-t I

N I

N I

N I

C: C: C: C: C: C: C: C: C: C. C: C. C. C.10 C: C: C: C: C:

10

-, 10

-, 10

-, 10

-, 10

-, 10

-, 10

-, 10

-, 10

-, ~ ~ 10

-, ~ ~ -, 10

-, 10

-, 10

-, 10

-, 10 Figure 4-1 TLD (mrem/Standard Month)

Sector TLDs are deployed quarterly at thirty-two locations in the environs of the North Anna site. Two badges are placed at each location. The average level of these 32 sector TLD locations (two badges at each location) was 4.1 mR/standard month with a range of 1.4 to 8.7 mR/standard month. The highest quarterly average reading for any single location was obtained at location NW-29/61. This value was 7.1 mR/standard month. This location is on site on the Laydown Area north gate. Quarterly and annual TLDs are also located at twelve environmental air sampling stations. For the eleven indicator locations within 10 miles of the station the average quarterly reading was 3.6 mR/standard month with a range of 1.7 to 5.9 mR/standard month. The average annual reading for these locations was 5.5 mR/standard month with a range from 4.3 to 6.8 mR/standard month. The control location showed a quarterly average of 3.1 mR/standard month with a range of 2.5 to 3.8 mR/standard month. Its annual reading was 5.1 mR/standard month. 10 emergency sector TLDs, which are all located onsite had a quarterly average of 5.0 mR/standard month with EPSP-9/10 having the highest quarterly average of 7.1 mR/standard month. Eight other TLDs, designated C-1 thru C-8, which were pre-operational controls, were collected quarterly from four locations. Stations C-3/4 and C-7/8 are designated controls. These had a quarterly average of 3.7 mR/ standard month, while Station C-1/2 and C-5/6 had a quarterly average of 2.9 mR/standard month with a range of 1.5 to 6.8 mR/standard month. During the pre-operational period (starting in 1977) the doses were measured between 4.3 and 8.8 mR/standard month.

4.2 Airborne Gross Beta Results of the weekly gross beta analyses are presented in Table 3-3. A review of the historical plot in Figure 4-2, indicates gross beta activity levels have remained relatively unchanged. The drop indicated in 2009 may be a function of a return to the vendor used from 1988 until 2001. This will be monitored in the future to see if this is in fact the case.

Inner and outer ring monitoring locations continue to show no significant variation in measured activities (see Figure 4-3).

This indicates that any station contribution is not measurable.

59

Gross beta activity found during the pre-operational and early operating period of North Anna Power Station was higher because of nuclear weapons testing. During that time, nearly 740 nuclear weapons were tested worldwide. In 1985 weapons testing ceased, and with the exception of the Chernobyl accident in 1986, airborne gross beta results have remained steady. During the preoperational period of July 1, 1974 through March 31 , 1978 gross beta activities ranged from a low of0.005 pCi/m3 to a high of 0.75 pCi/m3.

0.12 0.1 -

0.08 E 0.06 0 Q.

0.04 0.02 0 co CJ) 0 ..--- N C') "<t Ii) CD ...... co CJ) 0 N C') "<t Ii) CD ......

CJ)

~

c CJ) c

~

0

~

c t~ ~t ~t 0

~

c t~ 9C

~

0

~

c 0

~

c t

~

t

~

t

~

t

~

t

~

t

~

t

~

t

~

t

~

-Control - Indicator Average Pre-Op - - Required LLD Figure 4-2 Historical Gross Beta in Air Particulates 3 .00E-02 1.SOE-02 1.00E-02

-+- Control - Indicator Figure 4-3 2020 Gross Beta in Air Particulates (pCilm 3) 60

4.3 Airborne Radioiodine Charcoal cartridges are used to collect airborne radioiodine. Once a week the samples are collected and analyzed. The results of the analyses are presented in Table 3-4. These results are similar to pre-operational data and the results of samples taken prior to and after the 1986 accident in the Soviet Union at Chernobyl and the effect of the Fukushima Daiichi event.

4. 4 Air Particulate Gamma The air particulate filters that are utilized for the weekly gross beta analyses are composited by location and analyzed quarterly by gamma spectroscopy. The results are listed in Table 3-5. The results indicate the presence of naturally occurring Be-7, which is produced by cosmic processes. Examination of pre-operational data indicates comparable measurements of Be-7, as would be expected. The results of these analyses indicate the lack of station effects on the environment.

4.5 Air Particulate Strontium Strontium-89 and 90 analyses are performed on the second quarter composites of air particulate filters from all monitoring stations. There has been no detection of these fission products at any of the indicator or control stations in recent years.

4.6 Soil Soil samples, which are collected every three years from twelve stations, were not due to be collected during the reporting period.

4. 7 Precipitation A sample of rain water was collected monthly at on-site station OlA and analyzed for gross beta activity and H-3. The results are presented in Table 3-7. Twelve precipitation samples were obtained in 2020. Semi-annual composites are prepared and analyzed for gamma emitting isotopes in accordance with program requirements. No plant related isotopes were reported in any precipitation water sample at the indicator location. Naturally occurring gamma emitting radioisotopes were not detected. No positive H-3 result was reported. During the pre-operational period gross beta activity in rain water was expressed in nCi per square meter of the collector surface, thus a direct comparison cannot be made to the 2020 period. During the pre-operational period, tritium was measured in over half of the few quarterly composites made. This tritium activity ranged from 100 to 330 pCi/liter.

4.8 CowMilk Milk samples were unavailable during the reporting period due to the closure of the final operating dairy within the sampling area on 1/1/ 18.

61

4.9 Food Products and Vegetation Food/vegetation samples were collected from five locations and analyzed by gamma spectroscopy. The results of the analyses are presented in Table 3-9. Low levels of Cs-137, attributable to fallout, have been seen periodically in vegetation samples. As expected, naturally occurring potassium-40 and cosmogenic beryllium-7 were detected in most samples, and thorium-228 and other natural products, including Ra-226 and Th-232, were detected in some samples. No plant related isotopes were identified in any vegetation sample during 2020.

4.1 0 Well Water Water was sampled quarterly from the onsite well at the metrology laboratory. These samples were analyzed for gamma radiation and for tritium. The second quarter sample was analyzed by vendor for Sr-89, Sr-90, H-3, I-131, and gamma emitters. The results of these analyses are presented in Table 3-10. No plant related isotopes were detected. No gamma emitting isotopes were detected during the pre-operational period.

4.11 River Water Samples of water from the North Anna River were collected monthly. The analyses are presented in Table 3-11. All monthly samples are analyzed by gamma spectroscopy. The monthly samples are composited quarterly and analyzed for tritium. Additionally, the second quarter samples are analyzed for strontium-89 and strontium-90 in accordance with program requirements. There has been no detection of these fission products at any of the indicator or control stations in recent years.

No gamma emitting radioisotopes were positively identified in any of the samples. There was no measured activity of strontium-89 or strontium-90. Tritium was measured in all four samples with an average annual concentration of 2858 pCi/liter and a range of 1390 to 3960 pCi/liter , see Figure 4-4 . No river water samples were collected during the pre-operational period.

River Water 5500 5000 4500 4000

.::::!, 3500 ~ Tritium uci. 3000 - Required LLD 2500 2000 1500 1000 62

4.13 Bottom Sediment Bottom sediment or silt is sampled to evaluate any buildup of radionuclides in the environment due to the operation of the station. Buildup of radionuclides in bottom sediment could indirectly lead to increasing radioactivity levels in fish.

Sediment samples were collected during April and October from each of three locations and were analyzed by gamma spectroscopy. The October samples were analyzed for strontium-89 and strontium-90. The results are presented in Table 3-13.

No plant related isotopes were detected in 2020. The detection of Cs-137 in bottom sediment is historically common with positive indications usually apparent in both indicator and control samples. The detection of Cs-137 is the result of accumulation and runoff into the lake of residual weapons testing fallout; its global presence has been well documented.

During the pre-operational period sediment samples were also analyzed by gamma spectroscopy. Figure 4-6 shows the historical trend of Cs-13 7 in sediments.

Neither Strontium-89 nor Strontium-90 was detected in any samples of aquatic sediment/silt in 2020. Strontium-90 has been detected occasionally in the past at both the indicator and control locations and is attributable to fallout from past bomb tests. A number of naturally occurring radioisotopes were detected in these samples at background levels.

1600 1400 1200

-+- Station 08 c, 1000

~

- station 09

(.)

0. 800 Control Sta 09A 600 400 ~ station 11 200 0

Figure 4-6 Cs-137 in Sediment/Silt 4.14 Shoreline Soil Shoreline soil/sediment, unlike bottom sediment, may provide a direct dose to humans. Buildup of radioisotopes along the shoreline may provide a source of direct exposure for those using the area for commercial and recreational uses.

Samples of shoreline soil were collected in April and October from indicator station 08 . The samples were analyzed by gamma spectroscopy. The October sample was analyzed for strontium-89 and strontium-90. The results are presented in Table 3-14.

64

Naturally occurring radioisotopes were detected at concentrations equivalent to normal background activities. No plant related isotopes were detected in any indicator samples analyzed. Strontium-90 is often detected in this media, however as discussed previously, the presence of Sr-90 and Cs-13 7 is attributed to accumulation of residual global fallout from past atmospheric weapons testing.

4.15 Fish Four sample sets of fish, two from Lake Anna and two from the control station, Lake Orange, were collected during 2020 and analyzed by gamma spectroscopy. Each sample set consisted of a sample of game species and a sample of bottom-dwelling species, which were analyzed separately. The results are presented in Table 3-15. Naturally occurring K-40 was detected in all samples. No plant related isotopes were detected. Cs-137 was measured in pre-operational environmental fish samples.

65

5. PROGRAM EXCEPTIONS REMP Exceptions for Scheduled Sampling and Analysis during 2020 - North Anna Location Description Date of Sampling Reason( s) for Loss/Exception 14B,15,16,23,26 Vegetation 01/14/20 Seasonal unavailability 14B,15,16,23,26 Vegetation 02/11/20 Seasonal unavailability 14B,15,16,23,26 Vegetation 03/10/20 Seasonal unavailability 14B,15,16,23,26 Vegetation 04/ 14/20 Seasonal unavailability 14B, 15, 16,23 ,26 Vegetation 11/10/20 Seasonal unavailability 14B,15,16,23,26 Vegetation 12/09/20 Seasonal unavailability WSW-23 TLD 09/30/20 TLD was collected and shipped to vendor, no results reported.

NW-61 TLD 12/29/20 TLD was collected and shipped to vendor, no results reported.

66

REFERENCES Dominion, North Anna Power Station Technical Specifications, Units 1 and 2.

Dominion, North Anna Power Station Independent Spent Fuel Storage Installation Technical Specifications.

Dominion, Station Administrative Procedure, VPAP-2103N, "Offsite Dose Calculation Manual".

Virginia Electric and Power Company, North Anna Technical Procedure, HP-3051.010, "Radiological Environmental Monitoring Program".

Title 10 Code of Federal Regulation, Part 50 (1 0CFR50), "Domestic Licensing of Production and Utilization Facilities".

United States Nuclear Regulatory Commission Regulatory Guide 1.109, Rev. 1, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50, Appendix I",

October, 1977.

United States Nuclear Regulatory Commission, Regulatory Guide 4.8 "Environmental Technical Specifications for Nuclear Power Plants", December 1975.

USNRC Branch Technical Position, "Acceptable Radiological Environmental Monitoring Program", Rev. 1, November 1979.

NUREG 0472, "Radiological Effluent Technical Specifications for PWRs", Rev. 3, March 1982.

HASL-300, Environmental Measurements Laboratory, "EML Procedures Manual," 27 th Edition, Volume 1, February 1992.

NUREG/CR-4007, "Lower Limit of Detection: Definition and Elaboration of a Proposed Position for Radiological Effluent and Environmental Measurements," September 1984.

67

APPENDICES 68

APPENDIX A: LAND USE CENSUS Year 2020 69

LAND USE CENSUS North Anna Power Station Louisa County, Virginia January 1 to December 31, 2020 Direction Distance (miles)

Nearest Nearest Nearest Nearest Nearest Nearest Site Resident Garden(> Meat Milch Milch Boundary 50m 2) Animal Cow Goat N 0.87 1.3 2.75 4.03 NONE NONE NNE 0. 85 0.9 3.25 1.6 N ONE NONE NE 0.82 0.9 1.6 1.6 N ONE N ONE ENE 0.81 2.37 2.4 2.49 N ONE NONE E 0.83 1.25 1.75 3.5 N ONE NONE ESE 0.85 1.7 1.7 NONE N ONE NONE SE 0.88 1.4 1.4 1.4 N ONE NONE SSE 0.91 1.0 2.66 1.6 NONE NONE s 0.94 1.03 1.48 2.0 N ONE NONE SSW 1.01 1.27 2.00 2.0 N ONE NONE SW 1.06 1.65 3.96 NONE N ONE NONE WSW 1.09 1.62 1.77 NONE N ONE NONE w 1.06 1.5 1.93 NONE NONE N ONE WNW 1.02 1.1 2.67 4.98 NONE N ONE NW 0.97 0.98 1.09 NONE N ONE NONE NNW 0.90 1.0 1.33 2.3 NONE N ONE 70

2019 to 2020 Land Use Census Changes 2019 2020 Nearest Direction Distance Distance Resident NONE Site Boundary NONE Garden NNE 1.66 3.25 ESE 1.71 1.70 s 1.49 1.48 SSE 1.00 2.66 SSW 2.37 2.00 SW 1.65 3.96 Meat Animal NONE Milch Cow NONE Milch Goat NONE 71

known result was 0.078 Bq/sample (acceptance range 0.055 -0.101 }. This sample was run as th,e workgroup duplicate and had RPD's of 10.4% (U-234) and 11.7% (U-238). After the known results were obtained, the sample was relogged.

The filter was completely digest,ed with tracer added originally; the R 1 results wer:e almost identical. It was concluded that the r:ecorded tracer amount was actually double, causing the resu lts to be skewed. Lab worksheets have been modified to v,erify actual tracer amount vs. LIMS data. TBE changed vendors for this cross-check to ERA MRAD during the 2nd half or 2020. Results were acceptable at 97.-8% for U-234 and 106% for U-238. (NCR 20-13)

2. The Analytics September 2020 mi[k Sr-89 result was evaluated as No.t Acceptable. The reported value was 62.,8 pCi/L and the known result was 95.4 (66%). All QC data was reviewed and there wer:e no anomalies. This was t he first failure for milk Sr-89 since 2013 and there have only been 3 upper/lower boundary warnings since that time. It is believ,ed that there may have been some loss du ring the sample prep (ashing}. The December 2020 r:esult was at 92% of the known. (NCR 20-19)
3. The ERA October 2020 water 1-131 result was evaluated as Not Acceptable. The r,eported value was 22.'9 [PCi/l and th e known result was 28.2 (ac,ceptance range 23.5 - 33.1 }. The reported r,esult was 81 % or the known, which passes TBE QC criteria. This was the first failure for water 1-131. (NCR 20-17)
4. The ERA October 2020 water Gross Alpha and Gross Beta results were evaluated as Not Acceptable. The r eported/accept ab e values and ranges are as follows:

!Reported Known :Range Gross Alpha 40 .0 26.2 13.3- 34.7 Gross Beta 47 .5 69.1 48.0 - 76.0 All QC data was reviewed with no anomalies and a cause for failure could not be determined. This was the first faifure for water Gross Beta. A Quick Response follow-up cross-check was analyz,ed as soon as possible with acceptable results at 96.,8% for Gross Alpha and 102% for Gross Beta. ( OR 20-18)

5. The MAPEP August 2020 soil i-63 result was evaluat ed as Nol Acceptable. The r,eported value was 438 .:I: 21.1 Bq/kg and the known resu t was 980 Bq/kg (acceptance range 686 -1274). It is believed that som e Ni-63 loss may have occurred during th e sample p~ep. This investigation is still on-going at this time.

(NCR 20-20)

The Inter-Laboratory Comparison Program provides evidence of "in control'" counting systems a d methods, and that th e laboratories are producing accurate and reliable data.

73

A.1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Ratio o f TBE lo Month/Year Ma-lrix Nuclide Units TBEVa'lue Evaluation lb}

Number Value (a) 'K nown Res111t September 2020 E13247 Milk Sr-89 pCi/L 62.8 95.4 0.66 N (II Sr-90 pCi/L 12.0 12.8 0.94 A E13248 Milk Ce-141 pCi/L 156 150 1.04 A Co-58 pCi/L 172 180 0.96 A Co-60 pCi/L 369 379 0.97 A Cr-51 pCi/L 372 372 1.0 0 A Cs--134 pCi/L 171 200 0.85 A Cs--137 pCi/L 24 1 25!0 0.96 A Fe-59 pCi/L 217 200 1 .08 A 1-131 pCi/L 84.6 95.0 0.89 A Mni-:54 pCi/L 175 18.il 0.97 A Zn-65 pCi/L 252 .270 0,93 A E13249 Charcoal 1-131 pCi 70.2 75.8 0.93, A E13250 AP Ce-141 pCi 101 101 1.00 A Co-58 pCi 11 1 120 0,92 A Co-60 pCi 249 254 0.98 A Cr-51 pCi 287 249 1.15 A Cs-134 pCi 114 134 0.85 A Cs-137 pCi 159 168 0,95 A Fe-59 pCi 127 134 0.,95 A Mn-54 pCi 114 12 1 0.94 A Zn-65 pCi 168 181 0.93 A E13251 Soil Ce-141 pOi/g 0.241 0.19 1 126 'IN Co-58 pCi/g 0.211 0228 0.93 A Co-60 pCi/g 0.466 0.481 0.97 A C r--51 pCi/g 0.450 0.472 0.95 A Cs-134 pCi/g 0.273 0254 1.07 A Cs.-137 pCi/g 0.370 0 ..390 0.,95 A Fe-59 pCi/g 0.233 0254 0.92 A

,/ln-54 pCi/g 0.2 17 0229 0.95 A Zn-65 pCi/g 0.368 0.343 1.07 A E13252 AP S:r-89 pCii 79.9 100.0 0.80 A Sr-00 pOi 12.1 13.4 0.9 0 A (a} The Analytic:: known value i:; equal to 10096 of the param~er pre::ierrt .in the ~tanda<<J a:r detemimed by gravime!iic and/or volumetric measurements made during standard preparation (b} Analytics evaluation ba::ied on TBE infema.l ,QC firnits:

A = Acceptable - reported re::ult fa!13 within ratio limif:t of 0: 80-1.20 W=Accepta.ble with waming - .reported reBtdt falls wilhin 0.70-().80 or- 1.20-1.30 N = Not Acceptable - reported reault fall:; oufuide the ratio l im

  • w of< 0.70 and > 1.30 (1J See .N CR 20-19 74

A.1 Analytics Environmental RadioactMty Cross Check Program Te'ledyne Brown Engine.e ring Environmenta'I Se'ice.s ldentificatiolil Known Ratio ,of TBE to MonlhNear Matrix Nucrde Units TBE Value Evaluation (b)

Number Value (aJ Known Result December 2020 E13254 Milk Sr-89 pCi/L 82.2 89.7 0.92 A Sr-90 pCiJL 12.4 13.0 0.96 A E13255 Mil Ce-141 pCl/L 91.1 100 0.91 A Co-58 p CiJL 77.5 84.3 0.92 A Co-60 pCilL 147 152 0.97 A Cr-51 pCi*/ L 259 253 1.02 A Cs-134 pCi/L 97.1 108 0.90 A Cs-137 pCiJL 117 127 0.92 A Fe-59 pCi/L 114 112 1.02 A 1-131 pCi'/L 84.3 91.9 0.92 A Mn-54 pCi/L 137 143 0.96 A Zn-65 pCiJL 175 190 0.92 A E13256 Charcoal 1-131 pOi 70.2 78.2 0.90 A E13257A AP Ce-1 1 pOi 67.4 74.6 0.90 A Co-58 pOi 57.9 62.9 0.92 A CO-J60 pCi 108 11 3 0.95 A Or-51 pCii 162 189 0.8'6 A Cs-134 pCi 68.1 80-4 0.85 A C~137 pCi 82.4 95.0 0.87 A Fe-59 pCij 80.5 s:u 0.96 A Mn-54 pCi 102 107 0.95 A Zn-65 pCi 115 142 0.81 A E13256 Soll Ce-141 pCilg 0.167 0. 170 0.98 A Co-58 pCi/g 0.125 0.143 0.87 A Co-60 pCiJg 0.245 0.257 0.95 A C!r-51 pCi/g 0.393 0.429 0.92 A Cs-134 Cilg 0.147 0.183 0.BiJ A Cs-137 pCiJg 0.260 0.288 Cl90 A Fe-59 pCi/g 0.199 0.190 1.05 A Mn-54 pCi/g 0229 *0.243 0. 94 A Zn-65 pCiJg 0.320 0.322 0.99 A

'E 13259 AP Sr-89 pCi 85.0 78.6 1.08 A Sr-90 pCi 13.tt 11.4 1.15 A (aJ The A n ~ knoK'II ira.!ue k equ.aJ to 100% of ttre parameter present in the :::ran*darrl as detemiined by gravimemc andror

,volumetric measurement:; made dl:Jling standard preparation (b) Analytic$ evaluation based on IBE intemal QC limlb:

II = Acceptable - reported re.:::ult faf13 within raffo limit::: of 0.80-1.20 W = Acceptable with warning- repoded reruft fak wffhin Q70-0.80or 1..20-1.30' N = Not Acceptable-reported re:::11/Ualls outmde the ratio limit:; of< 0-70 and> 1.30 75

A.2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering 'Environmental Services Identification Units TBE Known Acceptance Month/Year Matrix Nucl'ide Evaluation (1>)

Number Value Value (a) Range Fe'b ruary 2020 20°GrF42 AP GrossA!pha Bq/samp'le 0.676 1.24 0.37-2 .11 A Gross Beta Bq/sample 2.03 2.00 1.00- 3.00 A 20-MaS42 Soil Ni.63 Bql1cg 0 .01 (1) A Sr-90 Bg/kg 348 340 238-442 A 20-Ma',11,142 Water Ni-63 Bq/l 11.6 11.1 7.8-14 .4 A Pu-238 Bq/L 0.926 0.94 0.66-1 .22 A Pu-239/240 Bq/L 0.712 0.737 0.5 16 - 0.958 A 20-Rdf42 AP U-2341233 Bq/sample 0.0416 0.075 0.053- 0 .098 N !"}

U-238 BqJsample 0.03aB 0.078 0.055- 0.101 N(3}

20-RdV42 Vegetation Cs-134 Bqfsample 3.23 3.82 2.67-4.97 A Cs-137 Bq/sample 2.64 2.n 1.94 - 3.60 A Co 0 57 Bq/sample 0.0281 (1) A Co-'60 Bq/sample 2.62 2.79 1.95- 3. 63 A Mn.54 Bq/sample 4.3 4.58 3.21 - 5.95 A Sr-90 Bqfsample 0..396 0.492 0.344 - 0.640 A Zn-65 Bq/ sample 3.93 3.79 2.65-4 .93 A August 2020 20-G:rF43 AP Gross Alpha Bq/sample 0267 0.528 0. 158- 0.989 A Gross Beta Bq/sample 0..939 0.915 0.458 - 1.373 A 2,0-MaS43 San Ni-63 Bq/kg 438 980 686-1274 N<4)

Tc-99 Bgl1cg 1.11 (1} A 20-MaW43 Water i-63 Bq/L 0.175 (1} A Te-99 Bq/L 8.8 9.4 6.6-12.2 A 20-RdV43 Veget ation Cs-134 Bq/sample 3.635 4.94 3.46-6.42 w Cs-137 Bqfsample 0.0341 {1} A C~7 Bq/sample 5.855 6.67 4.67- 8.67 w Co-60 Bq/sample 3.122 4. 13 2.89- 5.37 w n,-54 Bq/samp1e 4.524 5.84 4.09- 7.59 A Sr-9 Bq/sample 1.01 1.3.9 0.97-1 .81 w Zrn-65 Bq/sample 4.706 6.38 4.47-829 w (a} The MAPEP kno ;n l'afue ;3 equal fo 100% of the parameter pre::ent in ,the ::tancfar.d ao determined by gravimetric .and/or v.olumetric measuremenro made during standard preparation (b) .DOEIMAPEP evalua *on:

A = Acceptab!e - reported n>sult fall:; within ratio Iimifa of 0'. W-1. 2a W=AcceptabJe 111,*ffl'I wamirrg- .reporfed reaulffa/l.s within 0.7"0-0.80 or 1. 20-1.30 N = Not Acceptab.le - repcrlrtdre:wltfafk: ouf::;ide the ratio Jim im of< 0.70 and> 1.30

.(1} Falae po::.ifive test (2} Sen~ivity ,eva/uation (3) See flCR .20-13 (4} See NCR 20-20 76

A.3 ERA Environmental Rad ioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Acceptance MonthN ear Matrix Nuclide Units TBE Value Evaluation (t:,)

Number Va1ue 1"1 Limits March 2020 MRAD-32 Water Am-241 pCi/L 52.5 45.3 31.1 -57.9 A Fe-55 pCi/L 155 152 89.3-221 A Pu-238 pCi/L 34.0 36.4 21 .9 - 47.2 A Pu-239 pCi/L 30.9 33.6 2 0.8- 41.4 A April 2020 RAD-121 Water Ba-133 pCi/L 41.8 41 .8 34.0- 46.7 A Cs-134 pCi/L 42.9 46.3 37.1 -50.9 A Cs-137 pCi/L 226 234 211 -259 A Co-60 pCill 52.4 50.3 45.3-57.9 A Zn-65 pCilL 83.3 86.8 78.1 - 104 A

,GR-A pCi/L 20.1 23.6 11 .9 - 31 .6 A GR-8 pCill 45.6 60.5 41.7-67.2 A U-Nat pCi/L 18.45 18.6 14.9 - 20.9 A H-3 pCi/L 14200 14100 12300-15500 A S:r-89 pCi/L 58.0 60.1 48.3 - 67.9 A Sr-90 pCill 34.1 44.7 33.0 - 51.2 A 1-131 pCill 27.4 .28.9 24.1 -33.8 A September 2020 MRAD-33 Soil Sr-90 pCii/Kg 4360 4980 1550-7760 A AP Fe~55 pCiJFilter 189 401 149 - 649 A U-234 pCiJFilter 17.9 18.3 13.6 - 21.4 A U-238 1PCiJFilter 19.1 18.1 13-.7 -21.6 A Water Am-241 pCi/L 160 176 121 - 225 A Fe-55 pCilL 299 298 175 - 433 A Pu-238 pCi/L 200 191 115-247 A Pu-239 pCi/L 105 100 61 .9 - 123 A Octob er 202,0 RA0-123 Water Ba-133 pCill 37.1 37.0 29.8 - 41 .6 A Cs-:134 pCil'L 50.6 52.7 42.5-58.0 A Cs-137 pCifl 131 131 118 - 146 A Co-60 pCi/l 62.9 605 54.4 - 69. 1 A Zn-65 pCill 167 162 146 - 191 A

,GR-A pCill 40.0 26.2 13.3 - 34.7 Nl11

,GR-B pCilL 47.5 69.1 48.0- 76.0 Ntl l U-Na pCi/L 17.2 20.3 16.3-22.7 A H-3 pCill 2380 23.200 20,300 - 25,500 A Sr-89 pCi/L 41.1 43.3 33.4 - 50.5 A Sr-90 pCill 265 30.2 22.0 - 35.0 A 1-131 pCifl 22.9 28.2 23.5 - 33.1 Ni:21 November .2020 QR11 1920K Waer 1 GR-A pCi/L 50.7 52.4 27.3 - 65.6 A GR-8 pCill .24.9 24.3 15.0 - 32.3 A

{a) T.he ERA known value ro equal to 100% of the parameler,x:e"..errt in it.re :.tandam as detennined by gravimetric and/or 1101umetriG mea3tlll81?erts made during e!anda<<i p,;epara5o-n.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Aooepta11ce Limits N = Not Acceptable - Reported value faU~ oubide of fhe Acceptance Li.mite

( 1) See NCR 20-18 (2} See NCR 20-11 77

Retrieved from "https://kanterella.com/w/index.php?title=ML21144A187&oldid=3410067"