ML22138A254

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2021 Annual Radiological Environmental Operating Report
ML22138A254
Person / Time
Site: Kewaunee Dominion icon.png
Issue date: 05/10/2022
From:
ATI Environmental, Dominion Energy Kewaunee
To:
Office of Nuclear Material Safety and Safeguards, Office of Nuclear Security and Incident Response
References
Download: ML22138A254 (107)


Text

~ Dominion pr Energy 2021 Annual Radiological Environlllental Operating Report Kewaunee Power Station

- Dom_inion Energy Kewaunee, -Inc.

~ Dominion p Energy 2021 Annual Radiological Environ01ental Operating Report Kewaunee Power Station Part!

Summary and Interpretation

. Dotninion Energy Kewaunee, .Incg

  • ATI "J+~J-\1 Environmental, Inc.

Midwest Laboratory 700 Landwehr Road, Northbrook, IL 60062-2310 phone (847) SM-0700 , f.ix (847.) 564-4517 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT TO DOMINION NUCLEAR RADIOLOGICAL MONITORING PROGRAM FOR THE KEWAUNEE POWER STATION KEWAUNEE, WISCONSIN PART I-

SUMMARY

AND INTERPRETATION January 1 to December 31, 2021 Prepared and submitted by:

ATI ENVIRONMENTAL Inc.

Midwest Laboratory Project No. 8002 Approved, 0

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~ ..

Ashok D. Banavali, Ph.D. aniel J. Shannon Laboratory Manager Mana - Radiological Protection

~ and Chemistry, KPS

PREFACE The staff of ATI Environmental, Inc., Midwest Laboratory were responsible for the acquisition of data presented in this report. Assistance in sample collection was provided by Kewaunee Power Station personnel. The report was prepared by staff members of ATI Environmental, Inc., Midwest Laboratory.

ii

TABLE OF CONTENTS Preface .........................................................................................................................................................ii List of Figures ..............................................................................................................................................iv List of Tables ................................................................................................................................................iv

1.0 INTRODUCTION

.......................................................................................................................................... 1 2.0

SUMMARY

...................................................................................................................................................:....... 2 3.0 RADIOLOGICAL SURVEILLANCE PROGRAM ........................................................................................... 3 3.1 Methodology .................................................................................................................................. 3 3.1. 1 The Air Program .............................................................................................................. 3 3.1.2 The Terrestrial Program .................................................................................................. 4 3.1.3 The Aquatic Program ...................................................................................................... 5 3.1 .4 Program Execution .......................................................................................................... 6 3.1.5 Program Modifications ..................................................................................................... 6 3.2 Results and Discussion ................................................................................................................. 7 3.2.1 Atmospheric Nuclear Detonations and Nuclear Accidents .............................................. 7 3.2.2 The Air Environment.. ...................................................................................................... 7 3.2.3 The Terrestrial Environment .......................................................................................... 10 3.2.4 The Aquatic Environment .............................................................................................. 11 3.3 Land Use Census ........................................................................................................................ 12 3.4 Laboratory Procedures ................................................................................................................ 12 4.0 FIGURES AND TABLES ............................................................................................................................ 13

5.0 REFERENCES

.......................................................................................................................................... 25 APPENDICES A lnterlaboratory Comparison Program Results ............................................................................A-1 B Data Reporting Conventions ......................................................................................................8-1 C Effluent Concentrations ............................................................................................................. C-1 iii

LIST OF FIGURES No. Caption 4-1 Sampling locations, Kewaunee Power Station ............................................................................. 14 4-2 Groundwater Monitoring Wells, Kewaunee Power Station ........................................................... 15 LIST OF TABLES Title 4.1 Sampling locations, Kewaunee Power Station .............................................................................. 16 4.2 Type and frequency of collection ................................................................................................. 17 4.3 Sample codes used in Table 4.2 ................................................................................................. 17 4.4 Sampling summary, January- December, 2021 ......................................................................... 18 4.5 Environmental Radiological Monitoring Program Summary ......................................................... 19 4.6 Land Use Census ........................................................................................................................ 24 In addition, the following tables are in the Appendices:

Appendix A Attachment A: Acceptance criteria for spiked samples ........................................... A-2 A-1 lnterlaboratory Comparison Crosscheck Program, Environmental Resource Associates RAD study (substitute program for EPA) .............................................. A-3 A-2 lnterlaboratory Comparison Crosscheck Program, New York Department of Health (ELAP) ......................................................................................................... A-4 A-3 lnterlaboratory Comparison Program Results, Thermoluminescent Dosimeters (TLDs) .................................................................................................................... A-5 A-4 In-house Spiked Samples ........................................................................................ A-7 A-5 In-house "Blank" Samples ....................................................................................... A-10 A-6 In-house "Duplicate" Samples ................................................................................. A-12 A-7 Department of Energy MAPEP comparison results ................................................. A-16 A-8 lnterlaboratory Comparison Crosscheck Program, Environmental Resource Associates (substitute program for EML) ................................................................. A-19 iv

1.0 INTRODUCTION

The Kewaunee Power Station was a 598 megawatt pressurized water reactor located on the Wisconsin shore of Lake Michigan in Kewaunee County. The Plant became critical on March 7, 1974. Initial power generation was achieved on April 8, 1974, and the Plant was declared commercial on June 16, 1974.

On February 25, 2013, Dominion Energy Kewaunee submitted a certification of intent to cease power operations to the Nuclear Regulatory Commission. Power Operation of the Kewaunee Power Station ceased on May 7, 2013. The fuel was permanently removed from the reactor and placed in the spent fuel pool for storage on May 14, 2013. On June 15, 2017, the transfer of all spent fuel from the KPS Spent Fuel Pool (SFP) to the Independent Spent Fuel Storage Installation (ISFSI) was completed. All remaining irradiated materials were removed from the SFP in October of 2017. All radioactive liquid was drained from systems in the Auxiliary Building by the end of the first week of August 2018.

This report summarizes the environmental operation data collected during the period January -

December 2021.

Dominion Energy Kewaunee, operator and owner of the Kewaunee Power Station, assumes responsibility for the environmental program at the Plant. Any questions should be directed to Mr. Daniel J. Shannon, Manager Radiological Protection and Chemistry, at (920) 304-1129.

2.0

SUMMARY

Results of sample analyses during the period January - December 2021 are surnmarized in Table 4.5. Radionuclide concentrations measured at indicator locations are compared with levels measured at control locations and in preoperational studies. In no instance were REMP threshold reporting levels exceeded.

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3.0 RADIOLOGICAL SURVEILLANCE PROGRAM Following is a description of the Radiological Surveillance Program and its execution.

3.1 METHODOLOGY The sampling locations are shown in Figure 4-1. Table 4.1 describes the locations, lists for each direction and distance from the reactor, and defines which are the indicator and control locations.

The sampling program monitors the air, terrestrial, and aquatic environments. The types of samples collected at each location and the frequency of collections are presented in Table 4.2, using sample codes defined in Table 4.3. The collections and analyses that comprise the program are described below.

Finally, the execution of the program in the current reporting year is discussed.

  • 3.1.1 The Air Program Ambient Gamma Radiation - TLDs Ambient gamma radiation is monitored at the one control location (K-2), at four inner ring locations (K-1f, K-25, K-27 and K-30), and from six outer ring locations (K-3, K-5, K-8, K-17, K-39 and K-43) by thermoluminescent dosimetry (TLD). Two TLD cards, each having four main readout areas containing CaSO4:Dy phosphor, are placed at each location (eight readout areas per each location).

One card is exchanged quarterly, the other card is exchanged annually and read only on an emergency basis.

Dosimeters have also been placed at four additional locations (K-1 m, K-1 o, K-1 q and K-1 r), to monitor an Independent Spent Fuel Storage Installation (ISFSI) as part of the inner ring locations. They are replaced and measured quarterly.

Airborne Particulates Airborne particulates are collected on 47 mm diameter filters, at a volumetric rate of approx. one cubic foot per minute. The filters are collected weekly from four locations (K-1f, K-2(control), K-8 and K-43),

and dispatched by mail to ATI Environmental, Inc. for radiometric analysis. The particulate filters are counted for gross beta activity, a minimum of three days after the date of collection, to allow for the decay of naturally-occurring short-lived radionuclides.

Quarterly composites from each sampling location are analyzed for gamma-emitting isotopes on a high-purity germanium (HPGe) detector.

Airborne Iodine Airborne iodine analysis was discontinued beginning in 2018 due to the cessation of power operations (see Introduction on page 1).

Precipitation The collection and analysis of precipitation samples was discontinued beginning in 2018 due to the cessation of power operations (see Introduction on page 1).

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3.1.2 The Terrestrial Program Milk The collection and analysis of milk samples was discontinued beginning in 2018 due to the cessation of power operations (see Introduction on page 1).

WellWater Well water is collected quarterly from one off-site well location K-13 and from three on-site wells located at K-1h, K-1t and K-1u. Samples are only collected at locations K-1t and K-1u when these sources are tapped for drinking or irrigation purposes in areas where the hydraulic gradient or recharge properties are suitable for contamination.

Gamma spectroscopic analysis, tritium and gross beta on the total residue are performed for each water sample. The concentration of potassium-40 is calculated from total potassium. Samples of water from the three on-site wells (K-1 h, K-1t and K-1 u) are analyzed for gross alpha. The water sample from K-1 h is also tested for strontium-90.

Monitoring wells and results associated with the Ground Water Protection Program (GWPP) are reported in the KPS Annual Radioactive Effluent Release Report (ARERR). The groundwater monitoring well locations associated with the GWPP are included in Figure 4-2 along with the onsite well water sampling locations associated with the REMP.

Domestic Meat The collection and analysis of domestic meat was discontinued in 2018 due to the cessation of power operations (see Introduction on page 1).

The collection and analysis of eggs was discontinued in 2018 due to the cessation of power operations (see Introduction on_page 1).

Broad leaf Vegetation Annually, during the third quarter, samples of broad leaf vegetation are collected from location K-26. Samples may also be obtained from other local sources to supplement the program. In addition, two samples of broad leaf vegetation are collected annually from farmland owned by Dominion Energy Kewaunee (K-23a and K-23b) and rented to a private individual for growing crops. The samples are analyzed for gamma emitting isotopes.

Cattle Feed Cattle feed (e.g., hay and silage) is collected during the first quarter from dairy farm locations (K-3, K-34, K-35, K-38 and K-45). The samples are analyzed for gross beta, strontium-90 and gamma emitting isotopes.

Grass Grass is collected during the second, third and fourth quarters from two on-site locations (K-1 band K-1f) and from the dairy farm locations (K-3, K-5, K-34, K-35, K-38 and K-39). The samples are analyzed for gross beta, strontium-90 and gamma emitting isotopes.

Soil Soil samples are collected twice a year on-site at K-1f and from the dairy farm locations (K-3, K-34, K-35 and K-38). The samples are analyzed for gross alpha, gross beta, strontium-90 and gamma emitting isotopes.

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3.1.3 The Aquatic Program Surface Water Surface water samples are taken quarterly from two locations on Lake Michigan: 1) at the point where plant effluent water is discharged into Lake Michigan (K-1d); and 2) at the main pumping station located approximately equidistant from Kewaunee and Green Bay, which pumps water from the Rostek water intake (K-9) located 11.5 miles NNE of the reactor site. Both raw and tap water are collected at K-9. One~gallon water samples are taken quarterly from two creeks that pass through the site (K-1b and K- 1e). Samples from the Middle Creek (K-1b) are collected near the mouth of the creek. Samples from the South Creek (K-1e) are collected about ten feet downstream from the point where the outflow from the two drain pipes meets.

The water is analyzed for gamma emitting isotopes, gross beta activity in total residue, dissolved and suspended solids, and potassium-40, tritium and strontium-90. The concentration of potassium-40 is calculated from the total potassium concentration.

Fish Fish samples are collected during the third quarter near location K-1 d. The flesh is separated from the bones, gamma scanned and analyzed for gross beta activity. Bone samples are analyzed for gross beta, and strontium-90. A local fish market, (e.g., Lafond's in Kewaunee), may be used for backup fish samples, if needed.

Aquatic Slime The collection and analysis of aquatic slime was discontinued in 2018 due to the cessation of power operations (see Introduction on page 1).

Shoreline Sediment Shoreline sediments are collected in May and November from three locations (K-1 c, K-1j and K-9) in areas with potential for recreational value. The samples are analyzed for gross beta, strontium-90 and gamma emitting isotopes.

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3.1.4 Program Execution Program execution is summarized in Table 4.4. The program was executed for the year 2021 as described in the preceding sections, with the following exceptions:

Air Particulates No air particulate sample was able to be collected at location K-8, for the sample period ending 8/10/21. The circuit breaker to the pump was found open (CR#2217).

Well Water Location K-43 was substituted for location K-13 for the 10/04/21 collection due to the sickness of the owner at location K-13;* K-43 is located in the same sector and 0.3 mile from K-13; therefore it is an acceptable replacement sampling location.

Cattle Feed Collection of cattle feed was discontinued at locations K-5 and K-39 due to the suspension of dairy activities at both locations at the time of collection. New sampling location K-45 was identified and implemented for collecting cattle feed samples (CR#2182).

3.1.5 Program Modifications Cattle Feed Location K-45, Wakker's Dairy, was added as a cattle feed location and samples were collected in August 2021 as a replacement for the samples that had been previously collected at discontinued cattle feed locations K-5 and K-39. The change to the cattle feed sampling locations was included in REMM revision 23.

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3.2 RES ULTS AND DISCUSSION Results for the reporting period January to December, 2021 are presented in summary form in Table 4.5. For each type of analysis, of each sampled medium, the table shows the annual mean and range for all indicator and control locations. The location with the highest annual mean and the results for this location are also given.

The discussion of the results has been divided into three broad categories: the air, terrestrial, and aquatic environments. Within each category, samples will be discussed in the order listed in Table 4.4.

Any discussion of previous environmental data for the Kewaunee Power Station refers to data collected by Environmental Inc., Midwest Laboratory.

Results of all measurements made in 2021 are not included in this section, although references to these results will be made in the discussion. A complete tabulation of results is provided in Part II of the 2021 annual report on the Radiological Monitoring Program for the Kewaunee Power Station.

3.2.1 Atmospheric Nuclear Detonations and Nuclear Accidents There were no atmospheric nuclear tests or accidents reported in 2021. The Chernobyl and Fukushima Daiichi nuclear accidents occurred on April 26, 1986 and March 11, 2011, respectively. The last reported atmospheric nuclear test was conducted by the People's Republic of China on October 16, 1980. Contributions from these events have resulted in the presence of long-lived radioisotopes of cesium and strontium still detectable in the environment.

3.2.2 The Air Environment Ambient Gamma Radiation - TLDs Ambient gamma radiation was monitored by TLDs at eleven locations, ten indicators (K-1f, K-3, K-5, K-8, K-17, K-25, K-27, K-30, K-39 and K-43) and one control (K-2). TLDs at the indicator locations measured a mean dose equivalent of 16.4 mR/91 days, in close agreement with the control location 16.5 mR/91 days. The readings are similar to the averages obtained from 2002 (and prior to) through 2020.

These results support the conclusion that no plant effect on ambient gamma radiation was indicated. These values are lower than the United States average value of 19.5 mR/91 days due to natural background radiation (National Council on Radiation Protection and Measurements, 1975). The highest annual mean was 18.6 mR/91 days, measured at indicator location K-25.

Year Averaae /Indicators\ Averane !Controls)

Dose rate (mR/91 days}

2007 16.2 15.2 2008 15.6 14.2 2009 15.2 13.9 2010 15.2 14.3 2011 15.0 14.5 2012 16.1 15.3 2013 16.2 15.5 2014 15.0 14.8 2015 16.2 16.1 2016 16.5 15.9 2017 16.1 15.4 2018 16.4 17.1 2019 15.8 16.6 2020 16.4 16.7 2021 16.4 16.5 Ambient gamma radiation as measured by thermoluminescent dosimetry. Average quarterly dose rates.

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Using ANSI/HPS N13.37-2014 as guidance, a determination offacility related dose was performed using quarterly TLD data from control and indicator locations from 2011 through 2020.

A baseline background dose (Bo) was computed for each TLD location. Then a Quarterly Minimum Differential Dose (MDDo) was calculated as 3 times the 90th percentile of the standard deviations of the historical quarterly results. The result of this calculation was 5.5 mrem. Transit and storage doses weren't considered since the TLD's currently are, and have historically been, collected in the field and delivered to the laboratory for immediate processing.

2021 results at all locations, both indicator and control, were lower than the sum of the Baseline Background Dose (Bo) and the Quarterly Minimum Differential Dose (MDDo), which according to ANSI/HPS N13.37-2014 indicates no detection (ND) and which supports the conclusion that there is no plant effect.

Normalized Quarterly Monitoring Data Quarterly Facility Dose Quarterly M0 (mrem per standard quarter) F0 = M0 - [Bo+MDDo](mrem)

Monitoring Baseline st nd Locc;1tion B0 (mrem) 1 Qtr 2 Qtr 3 rd Qtr 4th Qtr 1st Qtr 2 nd Qtr 3rd Qtr 4th Qtr Indicators K-1f 14.1 14.2 14.4 13.7 15.0 ND ND ND ND K-3 17.2 16.1 15.3 16.2 17.6 ND ND ND ND K-5 16.3 15.7 16.9 15.5 15.6 ND ND ND ND K-8 15.6 15.4 16.6 16.3 18.5 ND ND ND ND K-17 16.5 17.6 18.4 17.6 18.2 ND ND ND ND K-25 17.8 16.7 18.6 18.4 20.6 ND ND ND ND K-27 16.2 16.3 16.8 17.2 18.7 ND ND ND ND K-30 16.0 16.2 15.5 15.4 16.2 ND ND ND ND K-39 16.2 16.1 17.2 16.8 19.4 ND ND ND ND K-43 14.3 13.8 13.4 14.2 15.3 ND ND ND ND Control K-2 16.5 15.9 15.9 16.0 18.1 ND ND ND ND Table assumes 1 roentgen = 1 rem.

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Airborne Particulates The annual gross beta concentration in air particulates averaged 0.025 pCi/m 3 at the indicator location and 0.023 pCi/m3 at the control location, similar to the means observed from 2002 (and prior to) through 2020. There is no indication of a plant effect, the average readings were evenly distributed between indicator and control locations.

Year Average (Indicators) Average (Controls) 3 Concentration (pCi/m )

2002 0.023 0.023 2003 0.022 0.022 2004 0.019 0.020 2005 0.023 0.023 2006 0.021 0.021 2007 .0.022 0.021 2008 0.022 0.022 2009 0.023 0.023 2010 0.023 0.022 2011 0.029 0.029 2012 0.029 0.030 2013 0.024 0.025 2014 0.019 0.019 2015 0.022 0.022 2016 0.021 0.020 2017 0.021 0.021 2018 0.023 0.024 2019 0.021 0.019 2020 0.023 0.023 2021 0.025 0.023 Average annual gross beta concentrations in airborne particulates.

Variation in the gross beta activity throughout the year is not unusual. Typically, higher beta averages occur during the months of January and December, and the first and fourth quarters, as noted in data from 2002 through 2021.

Gamma spectroscopic analysis of quarterly composites of air particulate filters yielded similar results for indicator and control locations. Beryllium-?, produced continuously in the upper atmosphere by cosmic radiation, was detected in all samples, with an average activity of 0.086 pCi/m 3 at the indicator locations and an average of 0.087 pCi/m 3 at the control location. All other gamma-emitting isotopes were below their respective MDC levels.

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3.2.3 The Terrestrial Environment Well Water Three of twelve samples tested positive for gross alpha at an average of 1.9 pCi/L. Detectable gross beta activity was measured in four of the twelve indicator samples and also in one of the four control samples tested. The average of indicator samples concentration measured 1.9 pCi/L versus a measurement of 1.0 pCi/L for the positive control sample. These levels are consistent with the concentrations of potassium-40 measured (1.98 pCi/L average for indicators versus 1.07 pCi/L average for controls). It is not unusual to see high potassium-40 levels in an agricultural setting. Potassium-40 is present wherever stable potassium is found. Therefore positive results can be attributed to agricultural runoff. The gross alpha activities are most likely contributions from naturally-occurring daughters of radium and thorium \/Vhen detected in the well water.

No strontium-90 was detected in any of the four samples tested. All concentrations measured below an MDC value 0.5 pCi/L.

Sixteen well water samples were tested for tritium and gamma emitting isotopes. All tritium concentrations measured below a detection level of 159 pCi/L. Gamma-emitting isotopes measured below respective MDC levels.

Broad Leaf Vegetation Three samples of broad leaf vegetation were analyzed for gamma emitters. Only naturally occurring potassium-40 and beryllium-? were detected.

Cattle Feed In the ten cattle feed samples analyzed in 2021 the gross beta average concentrations of 13.70 pCi/g wet indicator and 10.60 pCi/g wet control which agrees well with the potassium-40 average concentration results of 8.62 pCi/g wet indicator and 8.28 pCi/g wet control. Strontium-90 was detected in three of the six indicator samples at an average level of 0.003 pCi/g wet and at one of the four control samples at a level of 0.004 pCi/g wet. Trace levels of strontium-90 in the environment can be attributed to nuclear testing and accidents. With the exception of naturally occurring beryllium and potassium, all gamma emitting isotopes were below MDC levels. These results are also comparable to historical results for analysis of cattle feed. No plant effect is indicated.

Grass Eight grass samples were collected in June, August and October. at six indicator locations and two control locations for a total of twenty-four samples for the year. The samples were analyzed for gross beta, strontium-90 and gamma emitting isotopes. Analysis results show very good agreement between the gross beta results and the potassium-40 results. Naturally occurring beryllium-? was also detected in all of the samples. Trace levels of strontium-90 were detected in two of the twenty-four samples tested at an average concentration of 0.002 pCi/g wet. As mentioned previously, trace levels of strontium-90 in the environment can be attributed to nuclear testing and accidents.

l With the exception of the naturally-occurring beryllium and potassium, all gamma-emitting isotopes were below MDC levels. These results are comparable to historical results for analysis of grass. No plant effect is indicated.

Soil Gross alpha concentrations in soil averaged 6.68 pCi/g dry in the six indicator samples and 7.25 pCi/g dry in the four control samples. Mean gross beta levels measured at indicator and control locations averaged 24.72 and 24.26 pCi/g dry, respectively, primarily due to potassium-40 activity. A trace amount of strontium-90 was detected in one of the ten soil samples tested at a concentration of 0.029 pCi/g dry. Trace levels of strontium-90 in the environment can be attributed to nuclear testing and accidents.

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Cesium-137 was detected in all ten samples tested. Concentrations ranged from 0.05 pCi/g dry to 0.14 pCi/g dry with an average of 0.11 pCi/g dry at both the indicator and control locations. Trace levels of Cs-137 in the environment can be attributed to nuclear testing and accidents. Potassium-40 was detected in all samples and averaged 20.30 and 17.93 pCi/g dry for indicator and control locations, respectively. All other gamma-emitting isotopes were below respective MDC levels. The levels of detected activities are similar to those observed from 1990 through 2020. The data suggests no evidence of a plant effect.

3.2.4 The Aquatic Environment Surface Water Average gross beta activity in surface water measured slightly higher at the indicator locations (2.2 pCi/L) than at the control locations (1.1 pCi/L). A similar pattern of activity has been observed since 1978. The highest gross beta activities measured in 2021 were sampled from location K-1 b. The average activity was 3.1 pCi/L, with a range of 1.7 to 5.1 pCi/L. The highest average potassium-40 concentrations were also observed at location K-1 bat 4.0 pCi/L and ranged from 3.4 to 5.0 pCi/L. These levels were comparable to the indicator and control average levels of potassium-40 which were measured at 2.8 and 1.3 pCi/L respectively.

Year Averaae (Indicators) Averaae (Controls)

Gross Beta (12Ci/L}

2002 5.7 2.2 2003 7.3 2.4 2004 6.2 2.3 2005 5.2 1.7 2006 5.5 1.8 2007 5.7 1.8 2008 4.7 1.5 2009 4.7 1.5 2010 4.7 1.4 2011 5.0 1.5 2012 6.1 1.4 2013 5.7 1.5 2014 4.4 1.9 2015 4.2 1.4 2016 5.2 1.6 2017 4.2 1.4 2018 2.8 1.1 2019 3.1 1.2 2020 3.3 0.9 2021 2.2 1.1 Average annual gross beta concentrations in surface water.

These results that are comparable with historical results.

Tritium and Sr-90 were measured below their respective MDC's of 163 pCi/L and 0.8 pCi/ L for all twenty quarterly samples taken in 2021.

With the exception of naturally occurring potassium-40, gamma-emitting isotopes measured below their respective MDC levels in all samples.

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Fish In the fish sample, the gross beta concentration was 5.29 pCi/g wet in flesh and 4.52 pCi/g wet in bone fractions. In flesh, the gross beta concentration was primarily due to the potassium-40 concentration of 3.71 pCi/g wet.

Strontium-90 was measured below an MDC of 0.07 pCi/g wet in the bone fractions.

Excluding potassium-40, gamma-emitting isotopes measured below their respective MDC levels.

Shoreline Sediments In shoreline sediment samples, the mean gross beta concentrations measured an average 9.39 pCi/g dry at the indicator locations versus an average of 11.55 pCi/g dry at the control location. These results are consistent with the average levels of potassium-40 measured in these samples (5.99 pCi/g dry and 8.74 pCi/g dry respectively).

Other gamma-emitting isotopes, with the exception of naturally-occurring potassium-40, were below their respective MDC levels.

Strontium-90 was measured below an MDC of 0.067 pCi/g dry for all locations.

These results support the conclusion that there is no plant effect.

3.3 LAND USE CENSUS Tt"Je Land Use Census satisfies the requirements of the KPS Radiological Environmental Monitoring Manual. Section 2.2.2 states: *

"A land use census shall be conducted and shall identify within a distance of 8 km (5 mi.) the location, in each of the 10 meteorological sectors, of the nearest residence and the nearest garden of greater than 50m 2 (500 ft2) producing broad leaf vegetation." (Figure 4-1)

The 2021 Land Use Census was completed to identify the presence of the nearest residences and gardens surrounding the Kewaunee Power Station. The Land Use Census was conducted on September 1, 2021. The census is performed annually during the growing season per Radiation Protection Procedure RP-KW-001-014.

The 2021 Land Use Census did not identify any obvious changes. A summary of the Land Use Census is shown in table 4.6.

3.4 LABORATORY PROCEDURES Analytical Procedures used by Environmental, Inc. are on file and are available for inspection.

Procedures are based on those prescribed by the Health and Safety Laboratory of the U.S. Dep't of Energy, Edition 28, 1997, U.S. Environmental Protection Agency for Measurement of Radioactivity in Drinking Water, 1980, and the U.S. Environmental Protection Agency, EERF, Radiochemical Procedures Manual, 1984.

Environmental, Inc., Midwest Laboratory has a comprehensive quality control/quality assurance program designed to assure the reliability of data obtained. Details of the QA Program are presented elsewhere (Environmental, Inc., Midwest Laboratory, 2022). The QA Program includes participation in lnterlaboratory Comparison (crosscheck) Programs. Results obtained are presented in Appendix A.

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4.0 FIGURES AND TABLES 13

Figure 4-1. Sampling locations, Kewaunee Power Station.

14

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em::;l,,;iqn 12/1:?.'201711:28:40AM Figure 4-2. Groundwater Monitoring Wells, Kewaunee Power Station.

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Table 4.1. Sampling locations. Kewaunee Power Station.

Distance (miles)b Code Type* and Sector Location K-1 Onsite K-1b 0.12 N Middle Creek K-1c 0.10 N 500' north of condenser discharge K-1d 0.10 E Condenser discharge K-1e 0.12 S South Creek K-1f 0.12 S Maintenance Waste Oil and Material Storage Building K-1h 0.12 NW North Well K-1j 0.10 S 500' south of condenser discharge K-1m 0.15 N ISFSI East

.K-1o 0.16 N ISFSI North K-1q 0.16 N ISFSI West K-1r 0.13 N ISFSI West K-11 0.10 ESE Gatehouse K-1u 0.05SSW Maintenance Building K-2 C 8.91 NNE WPS Operations Building in Kewaunee K-3° 1/C 5.9 N Lyle and John Siegmund Farm, N2815 Hwy 42, Kewaunee K-5 I 3.2 NNW Ed Paplham Farm, E4160 Old Settlers Rd, Kewaunee K-8 4.85WSW St. Isadore the Farmer Church, 18424 Tisch Mills Rd, Tisch Mills K-9 C 11.5 NNE Green Bay Municipal Pumping Station, six miles east of Green Bay (sample source is Lake Michigan from Rosiak Intake two miles north of Kewaunee.

K-13 C 3.0SSW Rand's General Store, Two Creeks K-17 4.0W Klimesh's' Farm, N885 Tk B, Kewaunee K-23a 0.5W 0.5 miles west of plant, Kewaunee site K-23b 0.6 N 0.6 miles north of plant, Kewaunee site K-25 1.9SW Wotachek Farm, 3968 E. Cty Tk BB, Two Rivers K-26 C 9.1 SSW Wilfert Farms Vegetable Stand (9.1 miles south of "BB")

K-27 1.53 NW Schleis Farm, E4298 Sandy Bay Rd, Kewaunee K-30 0.8 N End of site boundary K-34 2.7 N Leon and Vicky Struck, N1549 Lakeshore Dr., Kewaunee K-35 C 6.71 WNW Duane Ducat, N1215 Sleepy Hollow Rd., Kewaunee K-38 2.45 WNW Dave Sinkula Farm, N890 Town Hall Road, Kewaunee K-39 3.46 N Francis Wojta, N1859 Lakeshore Dr., Kewaunee K-43 2.71 SSW Gary Maigatter Property, 17333 Hwy 42, Two Rivers K-45 5.1 N Wakker's Dairy, N2348 Highway 42, Kewaunee a I= indicator; C = control b Distances are measured from reactor stack.

c Location K-3 is an indicator for ambient radiation and a control for soil, cattle feed, and grass.

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Table 4.2. Type and frequency of collection.

Location Weekly Quarterly Semiannually Annuallv K-1b SW GR a K-1c SS b K-1d SW Fl*

K-1e SW K-1f AP~ GR* TLD so K-1h WW K-1i SS b K-1m TLD K-1o TLD K-1a TLD K-1r TLD K-11 WWh K-1u WWh 9 TLD K-2 AP K-3 GR* TLD so CF d K-5 GR* TLD 9 TLD K-8 AP K-9 sw 1 SS b K-13 WW K-17 TLD 0

K-23a BLV 0

K-23b BLV K-25 TLD K-26 BLV 0 K-27 TLD K-30 TLD K-34 GR* so CF d K-35 GR* so CF d K-38 GR 8

so CF d 8

K-39 GR TLD 9 TLD K-43 AP K-45 CF d a Three times a year, second (April, May, June), third (July, August, September), and fourth (October, November, December) quarters b To be collected in May and November cAnnually in the third quarter (July, August, or September).

d First (January, February or March) quarter only.

eAlternate, since milk sampling is no longer performed.

1 Two samples, raw and treated 0 The frequency may be increased dependent on the dust loading.

h Well water shall be taken when this source is tapped for drinking or irrigation purposes in areas where the hydraulic gradient or recharge properties are suitable for contamination.

Table 4.3. Sample Codes:

Code Description AP Airborne particulates BLV Broad leaf vegetation CF Cattle feed Fl Fish GR Grass so S_Qil SW Surface water ss Shoreline sediment TLD Thermoluminescent dosimeter WW Well water 17

Table 4.4. Sampling Summary, January - December, 2021.

Collection Number of Number of Sample Type and Number of Samples Samples Type Frequency* Locations Collected Missed Air Environment TLD's C/Q 15 60 0 Airborne particulates CNv 4 207 Terrestrial Environment Well water GIQ 4 16 0 Broad Leaf Vegetation GIA 3 3 0 Cattle Feed GIA 5 10 0 Grass GITA 8 24 0 Soil G/SA 5 10 0 Aquatic Environment Surface water GIM 4 20 0 Fish GIA 1 0 Shoreline sediments GISA 3 6 0

  • Type of collection is coded as follows: C = continuous; G = grab.

Frequency is coded as follows: W = weekly; BW = bi-weekly; SM = semimonthly; M = monthly; Q = quarterly; SA= semiannually; TA= three times per year; A= annually.

18

Table 4.5 Environmental Radiation Monitoring Program Summary.

Name of Facility Location of Facility Kewaunee Power Station Kewaunee County, Wisconsin Docket No.

Reporting Period ----------

50-305 January-December, 2021 (County, State)

Indicator Location with Highest Control Number Type and Annual Mean Sample Type Locations Locations Non-(Units)

Number of Analyses* MDCb Mean (F/ Locationd Mean (F)° Mean (F/ Routine Results*

Range Range0 Range TLDs (Quarterly) Gamma 44 5.5' 16.4 (40/40) K-25, Wotachek 18.6 (4/4) 16.5 (4/4) 0

  • (mR/91days) (13.4-20.6) Farm (16.7-20.6) (15.9-18.1) 1.9SW TLDs, Quarterly Gamma 16 5.5' 80.3 (16/16) K-1m, ISFSI E 147.6 (4/4) none 0 (Protected Area) (15.2-160.9) 0.15 N (136.2-160.9)

(mR/91days)

Airborne GB 207 0.010 0.025 (155/155) K-8, St. Isadore 0.026 (52/52) 0.023 (52/52) 0 Particulates (0.005-0.052) The Farmer Church, (0.006-0.052) (0.004-0.057) 3 4.85WSW (pCi/m )

GS 16 Be-7 0.020 0.086 (12/12) K-43, Maigatter 0.093 (4/4) 0.087 (4/4) 0 (0.057-0.107) Property (0.072-0.107) (0.073-0.102) 2.71 SSW Nb-95 0.0021 < MDC - - <MDC 0 Zr-95 0.0025 < MDC - - <MDC 0 Ru-103 0.0017 <MDC - - < MDC 0 Ru-106 0.0089 <MDC - - < MDC 0 Cs-134 0.0011 <MDC - - < MDC 0 Cs-137 0.0010 < MDC - - <MDC 0 Ce-141 0.0033 <MDC - - <MDC 0 Ce-144 0.0055 < MDC - - <MDC 0 19

Table4.5 Environmental Radiation Monitoring Program Summary.

Name of Facility Kewaunee Power Station Docket No. 50-305 Location of Facility Kewaunee County, Wisconsin Reporting Period January-December, 2021

{County, State)

Indicator Location with Highest Control Number Sample Type Type and Locations Annual Mean Locations Non-(Units) Number of MDCb Mean (F)° Mean(F)° Routine Locationd Mean(F)° Analyses* Range Range Range Results*

1.9 (3/12) K-1t, Gatehouse 2.7 (1/4)

Well Water GA 16 4.0 None 0 (1.7-2.7) 0.10 mi, ESE (pCi/L) 1.9 (4/12) K-1h, North Well 2.1 (1/4)

GB 16 3.7 1.0 (1/4) 0 (1.4-2.1) 0.2mi, NW K-1 t, Gatehouse 2.1 (1/4) 0.16 mi. ESE H-3 16 159 <MDC - - <MDC 0 1.98 (12/12) K-1t, Gatehouse 2.95 (4/4) 1.07 (4/4)

K-40 16 0.3 0 (2.79-3.12) 0.10 mi, ESE (2.79-3.12) (0.98-1.07)

Sr-90 4 0.5 <MDC - - None 0 GS 16 Mn-54 5.5 < MDC - - <MDC 0 Fe-59 9,0 < MDC - - <MDC 0 Co-58 4.7 <MDC - - <MDC 0 Co-60 6.2 <MDC - - <MDC 0 Zn-65 14.2 <MDC - - <MDC 0 Zr-Nb-95 8,3 <MDC - - <MDC 0 Cs-134 5.8 < MDC - - <MDC 0 Cs-137 6.4 <MDC - - <MDC 0 Ba-La-140 15.5 <MDC - - <MDC 0 Broad leaf GS 3 Vegetation (pCi/gwet) Be-7 0.100 2.00 (2/2) K-23a 2.43 (1/1) <MDC 0 (1.57-2.43) 0.5 mi W. of Plant K-40 0.50 7.05 (2/2) K-23b 10.11 (1/1) 2.39 (1/1) 0 (3.98-10.11) 0.6 mi N. of Plant Nb-95 0.027 < MDC - - .< MDC 0 Zr-95 0.033 <MDC - - <MDC 0 Ru-103 0.023 <MDC - - <MDC 0 Ru-106 0.207 <MDC - - <MDC 0 Cs-134 0.023 <MDC - - <MDC 0 Cs-137 0.025 <MDC - - < MDC 0 Ce-141 0.040 < MDC - - < MDC O*

Ce-144 0.166 <MDC - - < MDC 0 GB 10 0.008 13.70(6/6) K-45, Wakker's Dairy 15.29 (2/2) 10.60 (4/4) 0 Cattle feed (2.39-25.15) 5.1 mi. N (11.84-18.74) (2.43-18.20)

(pCi/gwet) 0.003 (3/6) K-35, Ducat Residence Sr-90 10 0.026 0.004 (1/2) 0.004 (1/4) 0 (0.001-0.004) 6.71 mi.WNW GS 10 Be-7 0.269 0.72 (3/6) K-35, Ducat Residence 1.98 (1/2) 1.98(1/4) 0 (0.43-1.21) 6.71 mi. N K-40 0.50 8.62 (6/6) K-45, Wakker's Dairy 12.28 (2/2) 8.28 (4/4) 0 (2.42-14.91) 5.1 mi. N (9.65-14.91) (3.05-13.43)

Nb-95 0.040 < MDC - - < MDC 0 Zr-95 0.048 <MDC - - <MDC 0 Ru-103 0.037 <MDC - - <MDC 0 Ru-106 0.316 < MDC - - < MDC 0 Cs-134 0.042 <MDC - - <MDC 0 Cs-137 0.036 <MDC - - <MDC 0 Ce-141 0.066 < MDC - - < MDC 0 Ce-144 0.313 < MDC - - < MDC 0 20

Table 4.5 Environmental Radiation Monitoring Program Summary.

Name of Facility Kewaunee Power Station Docket No. 50-305 Location of Facility Kewaunee County, Wisconsin Reporting Period January-December, 2021 (County, State)

Indicator Location with Highest Control Number Sample Type Type and Locations Annual Mean Locations Non-(Units) Number of MDCb Mean(F)° Mean (F) 0 Mean(F)° Routine Analyses" Range Locationd Range 0 Range Results*

Grass GB 24 0.10 6.72 (18/18) K-38, Sinkula Farm 7.56 (3/3) 7.35 (6/6) 0 (pCi/gwet) (3.37-9.99) 2.4 mi WNW (3.37-9.88) (4.08-9.02)

Sr-90 24

  • 0.006 0.002 (2/18) K-34, Struck Residence 0.0002 (2/3) < MDC 0 (0.001-0.003) 2.7mi N (0.001-0.003)

GS 24 Be-7 0.26 3.23 (18/18) K-39, Wojta Residence 4.17 (3/3) 1.90 (6/6) 0 (0.80-7.89) 3.46 mi N (2.00-5.64) (0.52-3.71)

K-40 0.50 6.57 (18/18) K-5, Paplham Farm 7.66 (3/3) 6.39 (6/6) 0 (2.82-10.74) 3.2mi. NNW (5.49-10.74) (4.65-8.43)

Mn-54 0.035 < MDC - - < MDC 0 Co-58 0.042 < MDC - - <MDC 0 Co-60 0.027 < MDC - - < MDC 0 Nb-95 0.033 < MDC - - < MDC 0 Zr-95 0.050 < MDC - - < MDC 0 Ru-103 0.045 < MDC - - < MDC 0 Ru-106 0.323 < MDC - - < MDC 0 Cs-134 0.034 < MDC - - <MDC 0 Cs-137 0.049 < MDC - - < MDC 0 Ce-141 0.075 < MDC - - < MDC 0 Ce-144 0.267 < MDC - - < MDC 0 Soil GA 10 5.6 6.68 (6/6) K-3, Siegmund Farm 7.83 (2/2) 7.25 (4/4) 0 (pCi/gdry) (6.01-7.06) 5.9 miN (7.52-8.13) (5. 78-8.13)

GB 10 2.0 24.72 (6/6) K-38, Sinkula Farm 29.49 (2/2) 24.26 (4/4) 0 (15.63-30.85) 2.4 mi. WNW (28.12-30.85) (17.77-30.13) 0.056 K-38, Sinkula Farm 0.029 (1/2) < MDC 0 Sr-90 10 0.029 (1/6) 2.4mi WNW GS 10 Be-7 0.48 < MDC - - < MDC 0 K-40. 1.4 20.30 (6/6) K-38, Sinkula Farm 22.91 (2/2) 17.93 (4/4) 0 (17.93-23.10) 2.4mi WNW (22.72-23.10) (13.73-21.65)

Nb-95 0.088 < MDC - - < MDC 0 Zr-95 0.109 < MDC - - < MDC 0 Ru-103 0.067 < MDC - - < MDC 0 Ru-106 0.377 < MDC - - < MDC 0 Cs-134 0.036 <MDC - - < MDC 0 Cs-137 0.024 0.11 (6/6) K-38,Sinkula Farm 0.12 (2/2) 0.11 (4/4) 0 (0.05-0.14) 2.4 mi WNW& (0.10-0.14) (0.06-0.13)

K-3, Siegmund Farm 0.12 (2/2) 5.9 miN (0.11-0.13)

Ce-141 0.128 < MDC - - < MDC 0 Ce-144 0.257 < MDC - - < MDC 0 21

Table 4.5 Environmental Radiation Monitoring Program Summary.

Name of Facility Kewaunee Power Station Docket No. 50-305 Location of Facility Kewaunee County, Wisconsin Reporting Period January-December, 2021 (County, State)

Indicator Location with Highest Control Number Sample Type Type and Locations Annual Mean Locations Non-(Units) Number of MDCb Mean (FJ° Mean (F) 0 Routine Analyses* Locationd Mean (F) 0 Range Range* Range* Results*

Surface Water GB(TR) 20 1.3 2.2 (12/12) K-1 b, Middle Creek 3.1 (4/4) 1.1 (8/8) o (0.9-5.1) 0.12 N (1.7-5.1) (0.7-1.5)

(pCi/L) GS 20 Mn-54 4.8 <MDC - - <MDC o Fe-59 9.0 <MDC - - <MDC o Co-58 5.5 <MDC - - <MDC o Co-60 3.9 <MDC - - <MDC o Zn-65 8.0 <MDC - - <MDC o Zr-Nb-95 5.8 <MDC - - <MDC o Cs-134 4.8 <MDC - - <MDC o Cs-137 5.9 <MDC - - <MDC o Ba-La-140 6.5 <MDC - - <MDC o H-3 20 163 <MDC - - <MDC o Sr-90 20 0.8 <MDC - - < MDC o K-40 20 2.30 2.8 (1 ~/12) K-1 b, Middle Creek 4.0 (3/4) 1.3 (8/8) o (1.2-5.0) 0.12 N (3.4 - 5.0) (1.2 - 1.5)

Fish (Flesh) GB 1 0.5 5.29 (1/1) K-1d, Cond. Discharge 5.29 (1/1) None o (pCi/gwet) 0.10 mi. E GS 1 K-40 0.5 3.71 (1/1) K-1 d, Cond. Discharge 3.71 (1/1) None o 0.10 mi. E Mn-54 0.020 <MDC - - None o Fe-59 0.046 <MDC - - None o Co-58 0.022 <MDC - - None o Co-60 0.018 <MDC - - None o Cs-134 0.017 <MDC - - None o Cs-137 0.018 <MDC - - None o Fish (Bones) GB 1 0.5 4.52 (1/1) K-1d, Cond. Discharge 4.52 (1/1) None o (pCi/gwet) 0.10mi. E Sr-90 1 0.07

<MDC - - None o 22

Table 4.5 Environmental Radiation Monitoring Program Summary.

Name of Facility Kewaunee Power Station Docket No. 50-305 Location of Facility Kewaunee County, Wisconsin Reporting Period January-December, 2021 (County, State)

Indicator Location with Highest Control Number Sample Type Type and Locations Annual Mean Locations Non-(Units) Number of MDCb Mean (F)° 0 Mean (F) 0 Routine Analyses" Locationd Mean (F)

Range0 Range0 Results*

Ranae 0 Shoreline GB 6 1.0 9.39 (4/4) K-9, Rostek Intake 11.55 (2/2) 11.55 (2/2) 0 Sediments (8.11 -12.12) 11.5 mi. NNE (9.50 - 13.59) (9.50 - 13.59)

Sr-90 6 0.067 <MDC - - <MDC 0 GS 6 K-40 0.5 5.99 (4/4) K-9, Rostek Intake 8.74 (2/2) 8.74 (2/2) 0 (3.91 - 8.44) 11.5 mi. NNE (7.70 - 9.78) (7.70 - 9.78)

Co-58 0.023 <MDC - - <MDC 0 Co-60 0.017 <MDC - - <MDC 0 Cs-134 0.021 <MDC - - <MDC 0 Cs-137 0.019 < MDC - - <MDC 0

  • GA = gross alpha, GB = gross beta, GS = gamma spectroscopy, TR = total residue.

b MDC= Minimum Detectable Concentration based on a 4.66 sigma counting error for background sample.

0 Mean and range are based on detectable measurements only (i.e., >MDC) Fraction of detectable measurements at specified locations is indicated in parentheses (F).

d Locations are specified by station code (Table 4.1) and distance (miles) and direction relative to reactor site.

  • Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

1 For TLD's this value is the Quarterly Minimum Differential Dose(MDDo). See page 8 of this report for the details of how it is computed.

23

Table 4.6 Land Use Census The following table lists an inventory of residences and gardens found nearest the plant in each of the 10 meteorological sectors within a five mile radius of the Kewaunee Power Station.

Sector Township No. Residence Garden Distance From Location ID Plant {miles)

A 24 X 1.12 A 12 X 3.71 B 24 X (Note 2) 1.01 R 26 X 0.96 R 23 X 2.16 Q 23 X 1.27 Q 23 X 1.53 K-27 p 26 X 1.35 p 26 X 1.41 N 35 X 0.94 N 28 X 2.37 M 35 X (Note 3) 1.38 L 35 X 1.00 L 2 X 2.04 K 36 X {Note 4) 0.91 J 11 X (Note 5) 2.72 Note 1. There were no changes identified during the 2021 Land Use Census.

Note 2. There were no gardens located in Sector B within five miles of the Kewaunee Power Station.

Note 3. There were no gardens located in Sector M within five miles of the Kewaunee Power Station.

Note 4. There was no garden located in Sector K within five miles of the Kewaunee Power Station.

Note 5. There were no gardens located in Sector J within five miles of the Kewaunee Power Station.

Note 6. The requirement for inventory of milk animals was removed in 2018 (REMM revision 21) due to the cessation of power operations (see introduction on page 1).

24

5.0 REFERENCES

Arnold. J. R. and H. A AI-Salih. 1955. Beryllium-? Produced by Cosmic Rays. Science 121: 451-453.

Eisenbud, M. 1963. Environmental Radioactivity, McGraw-Hill, New York, New York, pp. 213, 275, and 276.

Gold, S., H. W. Barkhau, 8. Shlein, and 8. Kahn, 1964 Measurement of Naturally Occurring Radionuclides in Air, in the Natural Radiation Environment, University of Chicago Press, Chicago, Illinois, 369-382.

ATI Environmental, Inc., Midwest Laboratory.

_ _ _--,-2001 to 2020. Annual Report. Radiological Monitoring Program for the Kewaunee Power Station; Kewaunee, Wisconsin, Final Report, Part 11, Data Tabulations and Analysis, January - December 2000 - 2016.

_ _ _ _ 1984 to 2000. (formerly Teledyne Brown Engineering Environmental Services, Midwest Laboratory)

Annual Reports. Radiological Monitoring Program for the Kewaunee Power Station, Kewaunee, Wisconsin, Final Report, Part 11, Data Tabulations and Analysis, January - December 1983 through January - December 1999.

_ _ _ _ 1979 to 1983. (formerly Hazleton Environmental Sciences Corporation) Annual Reports. Radiological Monitoring for the Kewaunee Power Station, Kewaunee, Wisconsin, Final Report - Part II, Data Tabulations and Analysis, January - December, 1978 through 1982.

_ _ _ _ 1977 to 1978. (formerly NALCO Environmental Sciences Corporation) Annual Reports. Radiological Monitoring for the Kewaunee Power Station, Kewaunee, Wisconsin, Final Report - Part II, Data Tabulations and Analysis, January

- December, 1976 to 1977.

_ _ _ _2022. Quality Manual, Rev. 7, 15 January 2022.

_ _ _ __.2020. Quality Control Procedures Manual, Rev. 4, 15 January 2020.

_ _ _ __.2012. Quality Assurance Program Manual, Rev. 3, 14 November 2012.

_ _ _ __.2009. Quality Control Program, Rev. 2, 12 November 2009.

Industrial BIO-TEST Laboratories, Inc. 1974. Annual Report. Pre-operational Radiological Monitoring Program for the Kewaunee Power Station. Kewaunee, Wisconsin. January - December 1973.

Industrial BIO-TEST Laboratories, Inc. 1975. Semi-annual Report. Radiological Monitoring Program for the Kewaunee Power Station, Kewaunee, Wisconsin. Jan. - June, 1975.

Kewaunee Power Station. 2021. Radiological Environmental Monitoring Manual (REMM). Revision 23, 20 October 2021 National Center for Radiological Health. 1968. Section 1. Milk Surveillance. Radiological Health Data Rep., December 9:

730-746.

National Council on Radiation Protection and Measurements. 1975. Natural Radiation Background in the United States.

NCRP Report No. 45.

Solon, L. R., W. M. Lowder, A Shambron, and H. Blatz. 1960. Investigations of Natural Environmental Radiation. Science.

131: 903-906.

U.S. Environmental Protection Agency, 2007. RadNet, formerly Environmental Radiation Ambient Monitoring System, Gross Beta in Air (WI) 1981 -2000.

Wilson, D.W., G. M. Ward, and J.E. Johnson, 1969. Environmental Contamination by Radioactive Materials. International Atomic Energy Agency, p. 125 American National Standards Institute/Health Physics Society (ANSI/HPS) N13.37 - 2014, Environmental Dosimetry - Criteria for System Design and Implementation 25

~k ATI Environmental Int.

7*~/"'\1 . Midwest Laboratory

'

  • 700 LandwehrRoai:J ;*Northbrook. IL 60062°2310 phone (847)584-0too ,iax}847J '564-4517.

APPENDIX A INTERLABORATORY AND INTRALABORATORY COMPARISON PROGRAM RESULTS NOTE: Appendix A is updated four times a year. The complete appendix is included in March, June, September and December monthly progress reports only.

January, 2021 through December, 2021

Appendix A lnterlaboratory/ lntralaboratory Comparison Program Results Environmental, Inc., Midwest Laboratory has participated in interlaboratory comparison (crosscheck) programs since the formulation of its quality control program in December 1971. These programs are operated by agencies which supply environmental type samples containing concentrations of radionuclides known to the issuing agency but not to participant laboratories. The purpose of such a program is to provide an independent check on a laboratory's analytical procedures and to alert it of any possible problems.

Participant laboratories measure the concentration of specified radionuclides and report them to the issuing agency. Several months later, the agency reports the known values to the participant laboratories and specifies control limits. Results consistently higher or lower than the known values or outside the control limits indicate a need to check the instruments or procedures used.

Results in Table A-1 were obtained through participation in the RAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

Table A-2 lists results for thermoluminescent dosimeters (TLDs), via irradiation and evaluation by the University of Wisconsin-Madison Radiation Calibration Laboratory at the University of Wisconsin Medical Radiation Research Center.

Table A-3 lists results of the analyses on intralaboratory "spiked" samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table A-4 lists results of the analyses on intralaboratory "blank" samples for the past twelve months. Data for previous years available upon request.

Table A-5 lists analytical results from the intralaboratory "duplicate" program for the past twelve months. Acceptance is based on each result being within 25% of the mean of the two results or the two sigma uncertainties of each result overlap.

The results in Table A-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

Results in Table A-7 were obtained through participation in the MRAD PT Study Proficiency Testing Program administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurement Laboratory Quality Assessment Program (EML).

Attachment A lists the laboratory acceptance criteria for various analyses.

Out-of-limit results are explained directly below the result.

A-1

Attachment A ACCEPTANCE CRITERIA FOR INTRALABORATORY "SPIKED" SAMPLES Analysis Ratio of lab result to known value.

Gamma Emitters 0.8 to 1.2 Strontlum-89, 0.8 to 1.2 Strontium-90 Potassium-40 0.8 to 1.2 Gross alpha 0.5 to 1.5 Gross beta 0.8 to 1.2 Tritium 0.8 to 1.2 Radium-226, 0.7 to 1.3 Radium-228 Plutonium 0.8 to 1.2 lodine-129, 0.8 to 1.2 lodine-131 Nickel-63, 0.7to1.3 Technetium-99, Uranium-238 lron-55 0.8 to 1.2 Other Analyses 0.8 to 1.2 A-2

TABLE A-1. lnterlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)".

RAD study Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result Result Limits Acceptance RAD-124 Study ERW-94 1/11/2021 Ba-133 24.1 +/- 3.5 23.8 18.4 - 27.4 Pass ERW-94 1/11/2021 Cs-134 46.1 +/- 3.1 42.8 34.2 -47.1 Pass ERW-94 1/11/2021 Cs-137 154 +/- 6.0 148 133 -165 Pass ERW-94 1/11/2021 Co-60 39.4 +/- 3.2 34.6 30.8 - 40.8 Pass ERW-94 1/11/2021 Zn-65 66.2 +/- 6.3 61.6 54.6 - 75.0 Pass ERDW-96 1/11/2021 Gr. Alpha 58.4 +/-2.6 63.3 33.2 - 78.5 Pass ERDW-96 1/11/2021 Gr. Beta 38.1 +/- 1.3 39.8 26.4 -47.3 Pass ERDW-98 1/11/2021 Ra-226 16.3 +/- 0.5 15.5 11.5-17.8 Pass ERDW-98 1/11/2021 , Ra-228 12.3 +/- 1.2 12.9 8.54 - 15.8 Pass ERDW-98 1/11/2021 Uranium 33.2 +/- 1.8 30.1 24.4 - 33.4 Pass ERW-100 1/11/2021 H-3 2,100 +/- 160 2,120 1,750 -2,350 Pass RAD-126 Study ERDW-2194 7/12/2021 Ba-133 44.1 +/- 4.0 45.5 37.2 - 50.6 Pass ERDW-2194 7/12/2021 Cs-134 85.2 +/- 3.9 87.5 71.8 - 96.2 Pass ERDW-2194 7/12/2021 Cs-137 218 +/- 8 208 187 -230 Pass ERDW-2194 7/12/2021 Co-60 91.7 +/-4.0 87.1 78.4 - 98.1 Pass ERDW-2194 7/12/2021 Zn-65 114 +/- 9 102 91.8 -122.0 Pass ERDW-2196 7/12/2021 Gr. Alpha 61.5 +/- 2.9 49.1 25.6 -61.7 Pass ERDW-2196 7/12/2021 Gr. Beta 31.7+/-1.3 31.5 20.3 - 39.2 Pass ERDW-2200 7/12/2021 Ra-226 16.5 +/- 0.5 13.4 10.0 -15.4 Failb ERDW-2200 7/12/2021 Ra-228 8.7+/-1.0 7.6 4.81 - 9.7 Pass ERDW-2200 7/12/2021 Uranium 71.7 +/-2.3 62.3 50.9 - 68.5 Faif ERDW-2202 7/12/2021 H-3 11,300 +/- 300 10,400 9,050 - 11,400 Pass ERDW-2198 7/12/2021 1-131 22.3 +/- 1.1 20.8 17.2 - 25.0 Pass

  • Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resource Associates (ERA).

b The radium-226 result did not meet ERA acceptance criteria.

0 The uranium result did not meet ERA acceptance criteria.

A-3

8 TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaSO 4 : Dy Cards).

mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental. Inc. Group 1 2021-1 11/8/2021 Spike 1 167.0 171.4 0.03 2021-1 11/8/2021 Spike 2 167.0 159.4 -0.05 2021-1 11/8/2021 Spike* 3 167.0 160.8 * -0.04 2021-1 11/8/2021 Spike 4 167.0 164.5 -0.01 2021-1 11/8/2021 Spike 5 167.0 156.7 -0.06 2021-1 11/8/2021 Spike 6 167.0 152.3 -0.09 2021-1 11/8/2021 Spike 7 167.0 158.7 -0.05 2021-1 11/8/2021 Spike 8 167.0 161.6 -0.03 2021-1 11/8/2021 Spike 9 167.0 152.4 -0.09 2021-1 11/8/2021 Spike 10 167.0 155.7 -0.07 2021-1 11/8/2021 Spike 11 167.0 158.8 -0.05 2021-1 11/8/2021 Spike 12 167.0 163.1 -0.02 2021-1 11/8/2021 Spike 13 167.0 162.2 -0.03 2021-1 11/8/2021 Spike 14 167.0 158.8 -0.05 2021-1 11/8/2021 Spike 15 167.0 173.5 0.04 2021-1 11/8/2021 Spike 16 167.0 158.7 -0.05 2021~1 11/8/2021 Spike 17 167.0 162.9 -0.02 2021-1 11/8/2021 Spike 18 167.0 159.3 -0.05 2021-1 11/8/2021 Spike 19 167.0 158.2 -0.05 2021-1 11/8/2021 Spike 20 167.0 161.7 -0.03 Mean (Spike 1-20) 160.5 -0.04 Passd Standard Deviation (Spike 1-20) 5.2 0.03 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(10)Ka = 1.20. mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventionally true value) + conventionally true value) where the conventionally true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-4

8 TABLE A-2. Thermoluminescent Dosimetry, (TLD, CaSO 4 : Dy Cards).

mrem Lab Code Irradiation Delivered Reportedb Performancec Date Description Dose Dose Quotient (P)

Environmental, Inc. Group 2 2021-2 11/8/2021 Spike 21 102.0 98.3 -0.04 2021-2 11/8/2021 Spike 22 102.0 88.4 -0.13 2021-2 11/8/2021 Spike 23 102.0 96.7. -0.05 2021-2 11/8/2021 Spike 24 102.0 101.4 -0.01 2021-2 11/8/2021 Spike 25 102.0 98.5 -0.03 2021-2 11/8/2021 Spike 26 102.0 96.3 -0.06 2021-2 11/8/2021 Spike 27 102.0 95.8 -0.06 2021-2 11/8/2021 Spike 28 102.0 94.3 -0.08 2021-2 11/8/2021 Spike 29 102.0 93.5 -0.08 2021-2 11/8/2021 Spike 30 102.0 95.7 -0.06 2021-2 11/8/2021 Spike 31 102.0 101.7 0.00 2021-2 11/8/2021 Spike 32 102.0 98.5 -0.03 2021-2 11/8/2021 Spike 33 102.0 96.7 -0.05 2021-2 11/8/2021 Spike 34 102.0 87.2 -0.15 2021-2 11/8/2021 Spike 35 102.0 89.7 -0.12 2021-2 11/8/2021 Spike 36 102.0 88.5 -0.13 2021-2 11/8/2021 Spike 37 102.0 85.4 -0.16 2021-2 11/8/2021 Spike 38 102.0 90.0 -0.12 2021-2 11/8/2021 Spike 39 102.0 90.9 -0.11 2021-2 11/8/2021 Spike 40 102.0 92.6 -0.09 Mean (Spike 21-40) 94.0 -0.08 Passd Standard Deviation (Spike 21-40) 4.7 0.05 Passd a TLD's were irradiated by the University of Wisconsin-Madison Radiation Calibration Laboratory following ANSI N13.37 protocol from a known air kerma rate. TLD's were read and the results were submitted by Environmental Inc. to the University of Wisconsin-Madison Radiation Calibration Laboratory for comparison to the delivered dose.

b Reported dose was converted from exposure (R) to Air Kerma (cGy) using a conversion of 0.876. Conversion from air kerma to ambient dose equivalent for Cs-137 at the reference dose point H*(1 0)Ka = 1.20 . mrem/cGy = 1000.

c Performance Quotient (P) is calculated as ((reported dose - conventionally true value) + conventionally true value) where the conventionally true value is the delivered dose.

d Acceptance is achieved when neither the absolute value of the mean of the P values, nor the standard deviation of the P values exceed 0.15.

A-5

TABLE A-3. lntralaboratory "Spiked" Samples Concentration" Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1° Activity Limitsd Acceptance Lab/Known SPW-55 1/8/2021 H-3 1,889 +/- 150 2,110 1,688 - 2,532 Pass 0.90 SPDW-62 1/11/2021 Gr. Alpha 34.3 +/- 1.7 64.9 34.0 - 80.4 Pass 0.53 SPDW-62 1/11/2021 Gr. Beta 9.2 +/- 0.8 8.9 3.6-17.4 Pass 1.04 SPW-131 1/19/2021 Sr-90 18.0+/-1.1 17.9 14.3 - 21.5 Pass 1.00 SPW-133 1/19/2021 H-3 1,842 +/- 150 2,110 1,688 - 2,532 Pass 0.87 SPW-188 1/18/2021 Ra-228 14.2 +/- 1.7 14.9 10.4 - 19.3 Pass 0.96 SPW-236 1/26/2021 Ra-228 12.2 +/- 1.9 15.3 10.7 -19.9 Pass 0.80 SPW-305 2/5/2021 H-3 1,785+/-147 2,110 1,688 - 2,532 Pass 0.85 SPW-372 2/12/2021 H-3 1,742 +/- 145 2,110 1,688 - 2,532 Pass 0.83 SPW-526 3/5/2021 H-3 1,899 +/- 150 2,110 1,688 - 2,532 Pass 0.90 SPW-692 3/19/2021 H-3 1,953 +/- 151 2,110 1,688 - 2,532 Pass 0.93 SPW-694 1/4/2021 Ra-226 9.7 +/- 0.4 12.3 8.6 -16.0 Pass 0.79 SPW-800 3/30/2021 Ra-228 15.8 +/- 2.0 15.3 10.7 - 19.9 Pass 1.03 SPW-802 3/31/2021 H-3 1,878 +/- 150 2,110 1,688 - 2,532 Pass 0.89 SPW-810 3/19/2021 Ra-226 11.4+/-0.3 12.3 8.6 - 16.0 Pass 0.93 SPDW-30103 3/31/2021 Ra-226 13.5 +/- 0.4 12.3 8.6 - 16.0 Pass 1.10 SPW-812 4/1/2021 H-3 2,005 +/- 155 2,110 1,688 - 2,532 Pass 0.95 SPW-919 4/7/2021 H-3 1,877 +/- 149 2,110 1,688 - 2,532 Pass 0.89 SPW-944 4/9/2021 Gr. Alpha 56.7 +/- 2.5 58.4 29.2 - 87.6 Pass 0.97 SPW-944 4/9/2021 Gr. Beta 35.1 +/- 1.3 38.1 30.5 - 45.7 Pass 0.92 SPW-1048 4/15/2021 H-3 1,915 +/- 152 2,110 1,688 - 2,532 Pass 0.91 SPW-1250 4/30/2021 H-3 2,015 +/- 154 2,110 1,688 - 2,532 Pass 0.95 SPW-1373 5/11/2021 Gr.Alpha 63.5 +/- 2.9 58.4 29.2 - 87.6 Pass 1.09 SPW-1373 5/11/2021 Gr. Beta 38.5 +/- 1.3 38.1 30.5 - 45.7 Pass 1.01 SPW-1377 5/11/2021 Sr-90 17.4+/-1.2 17.9 14.3 - 21.5 Pass 0.97 SPDW-30108 5/28/2021 H-3 2,222 +/- 161 2,110 1,688 - 2,532 Pass 1.05 SPDW-30125 5/13/2021 Ra-226 10.9 +/- 0.3 12.3 8.6 - 16.0 Pass 0.89 SPDW-30118 6/4/2021 H-3 2,230 +/- 163 2,110 1,688 - 2,532 Pass 1.06 SPMl-1672 6/8/2021 Sr-90 14.2 +/- 0.9 13.6 10.9 - 16.3 Pass 1.04 SPDW-30160 6/11/2021 Ra-226 11.4+/-0.3 12.3 8.6 -16.0 Pass 0.93 SPDW-30129 6/15/2021 H-3 2,238 +/- 162 2,110 1,688 - 2,532 Pass 1.06 SPDW-30134 6/18/2021 Gr. Alpha 17.9 +/- 1.4 23.5 11.8 - 35.3 Pass 0.76 SPDW-30134 6/18/2021 Gr. Beta 60.9+/-1.6 67.6 54.1-81.1 Pass 0.90 SPDW-30148 6/25/2021 Ra-228 15.1 +/- 2.9 15.3 10.7 -19.9 Pass 0.98 SPDW-30206 7/8/2021 Ra-226 12.7 +/- 0.4 12.3 8.6 -16.0 Pass 1.03 SPDW-3001 7/29/2021 . Ra-226 11.6 +/- 0.3 12.3 8.6 - 16.0 Pass 0.95

  • Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

b Laboratory codes : W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

0 Results are based on single determinations.

d Acceptance criteria are listed in Attachment A of this report.

A-6

TABLE A-3. lntralaboratory "Spiked" Samples .

Concentration*

Lab Codeb Date Analysis Laboratory results Known Control Ratio 2s, n=1° Activity Limitsd Acceptance Lab/Known SPDW-30224 8/2/2021 Gr. Alpha 38.6 +/- 2.1 49.1 24.6 - 73.7 Pass 0.79 SPDW-30224 8/2/2021 Gr. Beta 27.8 +/- 1.2 31.5 25.2 - 37.8 Pass 0.88 SPDW-30226 8/13/2021 H-3 2,074 +/- 157 2,110 1,688 - 2,_532 Pass 0.98 SPDWc30231 8/18/2021 Ra-228 14.5 +/- 2.2 15.3 10.7 -19.9 Pass 0.95 SPW-2783 9/3/2021 Sr-90 18.9 +/- 1.2 17.1 13.7 - 20.5 Pass 1.10 SPDW-2785 9/3/2021 H-3 2,135 +/- 158 2,110 1,688 - 2,532 Pass 1.01 SPDW-2891 9/10/2021 H-3 2,159+/-160 2,110 1,688 - 2,532 Pass 1.02 SPDW-3115 9/17/2021 Ra-226 11.3 +/- 0.3 12.3 8.6 -16.0 Pass 0.92 SPDW-3036 9/23/2021 Ra-228 18.0 +/- 2.6 15.3 10.7 -19.9 Pass 1.17 SPDW-3223 9/28/2021 Ra-228 16.6 +/- 2.5 15.3 10.7 -19.9 Pass 1.08 SPDW-3288 9/29/2021 U-234 29.2 +/- 1.6 23.0 16.1 -29.9 Pass 1.27 SPDW-3288 9/29/2021 U-238 28.2 +/- 1.6 23.2 16.3 - 30.2 Pass 1.21 SPDW-30276 9/29/2021 Ra-226

  • 9.4 +/- 0.4 12.3 8.6-16.0 Pass 0.76 SPDW-3157 10/1/2021 H-3 2,111 +/- 158 2,110 1,688 - 2,532 Pass 1.00 SPDW-3393 10/15/2021 H-3 2,184 +/- 161 2,110 1,688 - 2,532 Pass 1.04 SPDW-3604 10/28/2021 H-3 2,104+/-15 2,110 1,688 - 2,532 Pass 1.00 SPDW-30283 11/4/2021 Ra-226 11.7+/-0.3 12.3 8.6 -16.0 Pass 0.95 SPDW-3769 11/10/2021 H-3 2,026 +/- 156 2,110 1,688 - 2,532 Pass 0.96 SPDW-3860 11/18/2021 H-3 2,161 +/- 161 2,110 1,688 - 2,532 Pass 1.02 SPDW-30290 11/22/2021 Ra-226 12.0 +/- 0.3 12.3 8.6 -16.0 Pass 0.97 SPDW-3958 12/3/2021 H-3 2,126 +/- 160 2,110 1,688 - 2,532 Pass 1.01 SPW-3971 1217/2021 Sr-90 19.0 +/- 1.2 17.1 13.7 - 20.5 Pass 1.11 SPDW-30287 12/9/2021 Ra-228 12.3 +/- 1.7 15.3 10.7-19.9 Pass 0.80 SPDW-30295 12/16/2021 H-3 2,265 +/- 163 2,110 1,688 - 2,532 Pass 1.07 SPDW-30301 12/30/2021 H-3 2,055 +/- 163 2,110 1,688 - 2,532 Pass 0.97 SPDW-30307 12/13/2021 Ra-226 11.7+/-0.4 12.3 8.6 -16.0 Pass 0.95
  • Liquid sample results are reported in pCi/Liter, air filters ( pCi/m3), charcoal (pCi/charcoal canister), and solid samples (pCi/kg).

b Laboratory codes : W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

c Results are based on single determinations.

d Acceptance criteria are listed in Attachment A of this report.

A-7

TABLE A-4. lntralaboratory "Blank" Samples Concentration" Lab Codeb Sample Date Analysisc Laboratory results (4.66cr) Acceptance Type LLD Activity Criteria (4.66 cr)

SPW-54 Water 1/8/2021 H-3 153 24 +/-77 200 SPDW-61 Water 1/11/2021 Gr. Alpha 0.56 -0.32 +/- 0.37 2 SPDW-61 Water 1/11/2021 Gr. Beta 0.73 -0.11 +/- 0.49 4 SPW-130 Water 1/19/2021 Sr-89 0.66 -0.12 +/- 0.49 5 SPW-130 Water 1/19/2021 Sr-90 0.68 -0.02 +/- 0.31 SPW-132 Water 1/19/2021 H-3 165 38 +/-79 200 SPW-4923 Water 1/26/2021 1-131 0.28 0.26 +/- 0.16 1 SPW-187 Water 1/18/2021 Ra-228 1.44 0.81 +/- 0.76 2 SPW-235 Water 1/26/2021 Ra-228 1.54 0.94 +/- 0.82 2 SPW-254 Water 2/2/2021 1-131 0.29 -0.06 +/- 0.13 SPW-304 Water 2/5/2021 H-3 159 6 +/-74 200 SPW-371 Water 2/12/2021 H-3 154 -37 +/- 70 200 SPW-525 Water 3/5/2021 H-3 160 97 +/- 80 200 SPW-691 Water 3/19/2021 H-3 158 -38 +/- 71 200 SPW-693 Water 1/4/2021 Ra-226 0.03 -0.01 +/- 0.01 2 SPW-799 Water 3/30/2021 Ra-228 1.03 0.06 +/- 0.48 2 SPW-809 Water 3/19/2021 Ra-226 0.04 0.01 +/- 0.03 2 SPDW-30102 Water 3/31/2021 Ra-226 0.03 0.00 +/- 0.03 2 SPW-811 Water 4/1/2021 H-3 158 -29 +/- 77 200 SPW-918 Water 4/7/2021 H-3 156 93 +/- 79 200 SPW-943 Water 4/9/2021 Gr. Alpha 0.39 -0.08 +/- 0.27 2 SPW-943 Water 4/9/2021 Gr. Beta 0.73 0.04 +/- 0.51 4 SPW-1047 Water 4/15/2021 H-3 160 -51 +/- 74 200 SPW-1249 Water 4/30/2021 H-3 158 . 109 +/-81 200 SPW-1372 Water 5/11/2021 Gr. Alpha 0.35 0.27 +/- 0.27 2 SPW-1372 Water 5/11/2021 Gr. Beta 0.68 0.27 +/- 0.49 4 SPW-1376 Water 5/11/2021 Sr-89 0.52 0.23 +/- 0.39 5 SPW-1376 Water 5/11/2021 Sr-90 0.51 -0.06 +/- 0.23 1 SPDW-30124 Water 5/13/2021 Ra-226 0.03 -0.02 +/- 0.03 2 SPDW-30104 Water 5/26/2021 Ra-228 1.30 -0.04 +/- 0.60 2 SPDW-30107 Water 5/28/2021 H-3 157 33 +/- 76 200 SPDW-30117 Water 6/4/2021 H-3 165 67 +/- 81 200 SPMl-1671 Milk 6/8/2021 Sr-89 0.46 0.23 +/- 0.42 5 SPMl-1671 Milk 6/8/2021 Sr-90 0.45 0.23 +/- 0.24 1 SPDW-30159 Water 6/11/2021 Ra-226 0.04 -0.02 +/- 0.04 2 SPDW-30128 Water 6/15/2021 H-3 161 17 +/-76 200 SPDW-30133 Water 6/17/2021 1-131 0.20 0.06+/-0.12 1 SPDW-30134 Water 6/18/2021 Gr. Alpha 0.46 -0.11 +/- 0.32 2 SPDW-30134 Water 6/18/2021 Gr. Beta 0.70 -0.10 +/- 0.49 4 SPDW-30147 Water 6/25/2021 Ra-228 1.76 -0.15 +/- 0.80 2

  • Liquid sample results are reported in pCi/Liter, air filters ( pCiim\ charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b Laboratory codes: W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

' l-131(G); iodine-131 as analyzed by gamma spectroscopy.

d Activity reported is a net activity result.

A-8

TABLE A-4. lntralaboratory "Blank" Samples Concentration" 0

Lab Codeb Sample Date Analysis Laboratory results (4.66cr) Acceptance Type LLD Activity Criteria (4.66 cr)

SPDW-30205 Water 7/8/2021 Ra-226 0.03 0.02 +/- 0.03 2 SPDW-3000 Water 7/29/2021 Ra-226 0.03 0.03 +/- 0.03 2 SPDW-30223 Water 8/2/2021 Gr. Alpha 0.46 -0.13 +/- 0.31 2 SPDW-30223 Water 8/2/2021 Gr. Beta 0.70 0.16 +/- 0.49 4 SPDW-30225 Water 8/13/2021 H-3 161 -2 +/- 75 200 SPDW-30230 Water 8/18/2021 Ra-228 1.02 0.47 +/- 0.53 2 SPW-2782 Water 9/3/2021 Sr-89 0.60 -0.16 +/- 0.48 5 SPW-2782 Water 9/3/2021 Sr-90 0.63 0.20 +/- 0.32 1 SPDW-2784 Water 9/3/2021 H-3 157 -50 +/- 69 200 SPDW-2890 Water 9/10/2021 H-3 163 -59 +/- 72 200 SPDW-2981 Water 9/17/2021 H-3 162 11 +/- 78 200 SPDW-3114 Water 9/17/2021 Ra-226 0.03 0.04 +/- 0.03 2 SPDW-3035 Water 9/23/2021 Ra-228 1.15 0.10 +/- 0.55 2 SPDW-3222 Water 9/28/2021 Ra-228 1.37 -0.30 +/- 0.60 2 SPDW-3287 Water 9/29/2021 U-234 0.22 0.19 +/- 0.23 SPDW-3287 Water 9/29/2021 U-238 0.38 -0.05 +/- 0.21 SPDW-30275 Water 9/29/2021 Ra-226 0.05 0.03 +/- 0.04 2 SPDW-3156 Water 10/1/2021 H-3 161 -11 +/- 75 200 SPDW-3289 Water 10/12/2021 Gr. Alpha 0.40 0.21 +/- 0.30 2

'SPDW-3289 Water 10/12/2021 Gr. Beta 0.72 0.31 +/- 0.52 4 SPDW-3392 Water 10/15/2021 H-3 158 58 +/- 79 200 SPDW-3603 Water 10/28/2021 H-3 163 26 +/- 77 200 SPDW-30282 Water 11/4/2021 Ra-226 0.04 0.04 +/- 0.03 2 SPDW-3768 Water 11/10/2021 H-3 162 31 +/- 77 200 SPDW-3859 Water 11/18/2021 H-3 162 45 +/- 78 200 SPDW-30289 Water 11/22/2021 Ra-226 0.03 0.19 +/-0.03 2 SPDW-3957 Water 12/3/2021 H-3 161 118+/-84 200 SPW-3970 Water 12/7/2021 Sr-89 0.54 -0.12 +/- 0.43 5 SPW-3970 Water 12/7/2021 Sr-90 0.54 0.08 +/- 0.26 1 SPDW-30286 Water 12/9/2021 Ra-228 0.91 -0.26 +/- 0.39 2 SPDW-30288 Water 12/10/2021 1-131 0.22 0.00 +/-0.12 1 SPDW-30306 Water 12/13/2021 Ra-226 0.05 -0.05 +/- 0.04 2 SPDW-30294 Water 12/16/2021 H-3 162 -33 +/- 73 200 SPDW-30300 Water 12/30/2021 H-3 166 68 +/- 91 200

  • Liquid sample results are reported in pCi/Liter, air filters ( pCiim\ charcoal (pCi/charcoal canister), and solid samples (pCi/g).

b Laboratory codes: W & SPW (Water), Ml (milk), AP (air filter), SO (soil), VE (vegetation), CH (charcoal canister), F (fish), U (urine).

0 1-131 (G); iodine-131 as analyzed by gamma spectroscopy.

d Activity reported is a net activity result.

A-9

TABLE A-5. lntralaboratory "Duplicate" Samples Concentration*

Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance S-20,21 1/5/2021 K-40 23.3 +/- 0.6 22.6 +/- 1.6 23.0 +/- 0.9 Pass XW-295,296 1/13/2021 H-3 245 +/- 87 288 +/- 89 267 +/- 62 Pass S-143,144 1/14/2021 K-40 7.47 +/- 0.76 8.38 +/- 0.22 7.93 +/- 0.40 Pass S-360,361 2/10/2021 K-40 9.23 +/- 0.54 9.0,0 +/- 0.68 9.12 +/- 0.43 Pass S-406,407 2/15/2021 K-40 2.92 +/- 0.28 2.94 +/- 0.94 2.93 +/- 0.49 Pass W-469,470 2/22/2021 Ra-226 0.75 +/- 0.21 0.87 +/- 0.22 0.81 +/- 0.15 Pass W-448,449 2/25/2021 Gr. Alpha 3.52 +/- 1.84 3.72 +/- 1.87 3.62. +/- 1.31 Pass W-448,449 2/25/2021 Gr. Beta 8.71 +/- 1.36 8.91 +/- 1.40 8.81 +/- 0.98 Pass

  • W-448,449 2/25/2021 Ra-226 1.87 +/- 0.25 1.82 +/- 0.28 1.85+/-0.19 Pass W-448,449 2/25/2021 Ra-228 2.65 +/- 1.26 2.53 +/- 1.35 2.59 +/- 0.92 Pass P-511,512 3/2/2021 H-3 198 +/- 85 202 +/- 86 200 +/- 60 Pass WW-630,631 3/10/2021 H-3 144 +/- 82 148 +/- 82 146 +/- 58 Pass WW-743,744 3/16/2021 H-3 183 +/- 85 167 +/- 84 175 +/- 60 Pass S-785,786 3/25/2021 Pb-214 0.59 +/- 0.08 0.34 +/- 0.05 0.47 +/- 0.05 Pass S-785,786 3/25/2021 Ac-228 0.61 +/- 0.12 0.58 +/- 0.13 0.60 +/- 0.09 Pass AP-1052,1053 3/30/2021 Be-7 0.081 +/- 0.010 0.075 +/- 0.011 0.078 +/- 0.007 Pass AP-966,967 3/30/2021 Be-7 0.080 +/- 0.010 0.085 +/- 0.009 0.083 +/- 0.007 Pass SWU-835,836 3/30/2021 Gr. Beta 1.22 +/- 0.56 1.27 +/- 0.55 1.24 +/- 0.39 Pass AP-1204,1205 3/30/2021 Be-7 0.187 +/-0.102 0.160 +/- 0.088 0.173 +/- 0.067 Pass AP-1029, 1030 4/2/2021 Be-7 0.067 +/- 0.012 0.079 +/- 0.012 0.073 +/- 0.009 Pass SW-922,923 417/2021 H-3 440 +/- 99 307 +/- 93 373 +/- 68 Pass WW-987,988 4/12/2021 H-3 190 +/- 87 284 +/- 92 237 +/- 63 Pass F-1246, 1247 4/22/2021 K-40 3.26 +/- 0.66 2.83 +/- 0.46 3.04 +/- 0.40 Pass SWT-1311,1312 4/27/2021 Gr. Beta 1.05 +/- 0.52 1.16 +/-0.55 1.10 +/- 0.38 Pass WW-1401,1402 5/5/2021 _Gr. Alpha 1.10 +/- 1.00 2.50 +/- 1.20 1.80 +/- 0.78 Pass WW-1401,1402 5/5/2021 K-40 126 +/- 15 105 +/- 30 115 +/- 17 Pass DW-30071.,30072 5/6/2021 Ra-226 0.98 +/-0.15 0.67 +/- 0.13 0.83+/-0.10 Pass DW-30071.,30072 5/6/2021 Ra-228 0.83 +/- 0.51 1.21 +/- 0.54 1.02 +/- 0.37 Pass DW-30078,30079 5/10/2021 Gr. Alpha 4.90 +/- 0.92 5.92 +/- 0.99 5.41 +/- 0.68 Pass AP-051120A,B 5/11/2021 Gr. Beta 0.006 +/- 0.002 0.005 +/- 0.002 0.005 +/- 0.002 Pass DW-30083,30084 5/11/2021 Ra-226 0.34 +/- 0.13 0.19 +/- 0.20 0.27 +/- 0.12 Pass DW-30083,30084 5/11/2021 Ra-228 0.98 +/- 0.60 0.15 +/- 0.56 0.57 +/- 0.41 Pass S-1506,1507 5/18/2021 K-40 10.1 +/- 0.8 14.9 +/- 1.2 12.5 +/- 0.7 Pass DW-30092,30093 5/20/2021 Gr. Alpha 2.86 +/- 0.85 2.40 +/- 0.90 2.63 +/- 0.62 Pass DW-30095,30096 5/21/2021 Ra-226 1.18+/-0.16 0.73 +/- 0.15 0.96 +/- 0.11 Pass DW-30095,30096 5/21/2021 Ra-228 . 1.44 +/- 0.63 0.61 +/- 0.59 1.03 +/- 0.43 Pass AP-052521A,B 5/25/2021 Gr. Beta 0.021 +/- 0.003 0.022 +/- 0.003 0.021 +/- 0.002 Pass S-1589,1590 ?128/2021 Pb-214 1.16 +/- 0.08 1.06 +/- 0.09 1.11 +/- 0.06 Pass S-1589,1590 5/28/2021 Ac-228 1.17+/-0.18 1.08 +/- 0.14 1.13 +/- 0.11 Pass A-10

TABLE A-5. lntralaboratory "Duplicate" Samples Concentration*

Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance AP-060121A,B 6/1/2021 Gr. Beta 0.015 +/- 0.003 0.013 +/- 0.003 0.014 +/- 0.002 Pass DW-30113,30114 6/1/2021 Ra-226 2.00 +/- 0.34 2.64 +/- 0.26 2.32 +/- 0.21 Pass DW-30113,30114 6/1/2021 Ra-228 2.50 +/- 0.78 3.13 +/- 0.82 2.82 +/- 0.57 Pass PS-1631, 1632 6/2/2021 K-40 21.1 +/-0.8 20.4 +/- 0.8 20.7 +/- 0.6 Pass DW-30119,30120 6/3/2021 Gr. Alpha 1.18 +/-0.75 0.66 +/- 0.64 0.92 +/- 0.49 Pass WW-1908, 1909 6/4/2021 H-3 150 +/- 85 176 +/- 87 163 +/- 61 Pass VE-1717,1718 6/7/2021 Be-7 0.50 +/- 0.19 0.38 +/- 0.14 0.44 +/- 0.12 Pass VE-1717,1718 6/7/2021 K-40 5.26 +/- 0.47 5.45 +/- 0.44 5.35 +/- 0.32 Pass AP-060821A,B 6/8/2021 Gr. Beta 0.030 +/- 0.004 0.028 +/- 0.004 0.029 +/- 0.003 Pass AP-1822,1823 6/10/2021 Be-7 0.23 +/- 0.12 0.22 +/- 0.12 0.22 +/- 0.08 Pass CF-1844,1845 6/14/2021 K-40 8.37 +/- 0.44 8.33 +/- 0.35 8.35 +/- 0.28 Pass AP-061521A,B 6/15/2021 Gr. Beta 0.020 +/- 0.004 0.017 +/- 0.003 0.019 +/- 0.002 Pass DW-30131,30132 6/17/2021 Ra-226 0.41 +/- 0.21 0.34 +/- 0.23 0.38 +/- 0.16 Pass DW-30131,30132 6/17/2021 Ra-228 0.42 +/- 0.85 0.52 +/- 0.74 0.47 +/- 0.56 Pass DW-30138,30139 6/17/2021 Gr. Alpha 1.59 +/- 0.84 2.21 +/- 0.95 1.90 +/- 0.63 Pass S-1929, 1930 6/22/2021 K-40 19.4+/-1.0 19.2 +/- 1.1 19.3 +/- 0.7 Pass AP-062221A,B 6/22/2021 Gr. Beta 0.014 +/- 0.003 0.012 +/- 0.028 0.013 +/- 0.014 Pass DW-30150,30151 6/28/2021 Ra-226 0.53 +/- 0.15 0.55 +/- 0.19 0.54 +/-0.12 Pass DW-30150,30151 6/28/2021 Ra-228 0.76 +/- 0.54 0.52 +/- 0.52 0.64 +/- 0.37 Pass AP-2160,2161 6/28/2021 Be-7 0.11 +/- 0.01 0.11 +/- 0.01 0.11 +/- 0.01 Pass DW-30150,30151 6/28/2021 Ra-226 0.53 +/- 0.15 0.55 +/- 0.19 0.54 +/- 0.12 Pass DW-30150,30151 6/28/2021 Ra-228 0.76 +/- 0.54 0.52 +/- 0.52 0.64 +/- 0.37 Pass AP-2218,2119 6/29/2021 Be-7 0.11 +/- 0.01 0.12 +/- 0.01 0.11 +/- 0.01 Pass AP-2235,2236 6/30/2021 Be-7 0.10 +/- 0.01 0.11 +/- 0.01 0.10 +/- 0.01 Pass CF-2139,2140 7/12/2021 Be-7 0.49 +/- 0.12 0.65 +/- 0.20 0.57 +/- 0.12 Pass CF-2139,2140 7/12/2021 K-40 8.25 +/- 0.41 7.94 +/- 0.46 8.10 +/- 0.31 Pass VE-2214,2215 7/12/2021 K-40 3.26 +/- 0.11 3.41 +/- 0.25 3.34 +/- 0.14 Pass DW-30169,30170 7/12/2021 Gr. Alpha 2.61 +/- 0.87 2.09 +/- 0.84 2.35 +/- 0.60 Pass DW-30169,30170 7/12/2021 Gr. Beta 2.09 +/- 0.67 2.52 +/- 0.60 2.31 +/- 0.45 Pass DW-30169,30170 7/12/2021 Ra-226 0.84 +/- 0.24 0.82 +/- 0.20 0.83 +/- 0.16 Pass DW-30169,30170 7/12/2021 Ra-228 0.80 +/- 0.54 0.84 +/- 0.50 0.82 +/- 0.37 Pass AP-71320,71321 7/13/2021 Gr. Beta . 0.015 +/- 0.003 0.010 +/- 0.003 0.013 +/- 0.002 Pass XW-2424,2425 7/16/2021 H-3 193 +/- 86 104 +/- 81 149 +/- 59 Pass DW-30183,30184 7/19/2021 Ra-226 1.37+/-0.18 1.21 +/- 0.27 1.29 +/-0.16 Pass DW-30183,30185 7/19/2021 Ra-228 1.51 +/- 0.69 1.52 +/- 0.68 1.52 +/- 0.48 Pass AP-71920,71921 7/19/2021 Gr. Beta 0.021 +/- 0.004 0.020 +/- 0.003 0.021 +/- 0.002 Pass S-2277,2278 7/20/2021 K-40 13.6 +/- 0.9 12.3 +/- 0.9 12.9 +/- 0.6 Pass DW-30191,30192 7i20/2021 Gr. Alpha 3.88 +/- 0.94 3.66 +/- 94.00 3.77 +/-47.00 Pass SG-2382,2383 7/23/2021 Pb-214 1.88 +/- 0.21 1.94 +/- 0.21 1.91 +/-0.15 Pass SG-2382,2383 7/23/2021 Ac-228 1.69 +/- 0.28 1.96 +/- 0.33 1.83 +/- 0.22 Pass DW-30207,30208 7/26/2021 Gr. Alpha 5.47 +/- 1.29 5.20 +/- 1.24 5.34 +/- 0.89 Pass DW-30207,30208 7/26/2021 Gr. Beta 5.89 +/- 0.77 6.11 +/- 0.73 6.00 +/- 0.53 Pass A-11

TABLE A-5. lntralaboratory "Duplicate" Samples Concentration" Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-30210,30211 7/28/2021 Ra-226 0.48 +/- 0.13 0.62 +/- 0.11 0.55 +/- 0.09 Pass DW-30210,30211 7/28/2021 Ra-228 0.45 +/- 0.53 0.73 +/- 0.65 0.59 +/- 0.42 Pass S-2509,2510 8/1/2021 K-40 14.2 +/- 0.5 13.7+/-1.0 14.0 +/- 0.6 Pass S-2509,2510 8/1/2021 Be-7 7.27 +/- 0.29 7.97 +/- 0.69 7.62 +/- 0.37 . Pass DW-30221 ;30222 8/6/2021 Gr. Alpha 2.19 +/- 1.55 2.08 +/- 1.54 2.14+/-1.09 Pass DW-30221,30222 8/6/2021 Gr. Beta 1.19 +/- 1.04 2.76 +/- 1.08 1.98 +/- 0.75 Pass DW-30221,30222 8/6/2021 Ra-226 2.00 +/- 0.22 1.58 +/- 0.26 1.79 +/- 0.17 Pass DW-30221,30222 8/6/2021 Ra-228 1.69 +/- 0.56 1.75 +/-0.54 1.72 +/- 0.39 Pass VE-2551,2552 8/11/2021 K-40 2.68 +/- 0.20 2.61 +/- 0.27 2.64 +/- 0.17 Pass VE-2551,2552 8/11/2021 Be-7 0.16 +/- 0.08 0.18 +/- 0.08 0.17 +/- 0.05 Pass AP-2578,2579 8/12/2021 Be-7 0.18 +/- 0.09 0.20 +/- 0.11 0.19 +/- 0.07 Pass AP-082421 A, B 8/24/2021 Gr. Beta 0.032 +/- 0.004 0.028 +/- 0.004 0.030 +/- 0.003 Pass AP-083121A,B 8/24/2021 Gr. Beta 0.027 +/- 0.004 0.029 +/- 0.004 0.028 +/- 0.003 Pass VE-2684,2685 8/25/2021 K-40 2.15 +/- 0.26 1.92 +/- 0.27 2.03 +/- 0.19 Pass VEa2684,2685 8/25/2021 Be-7 0.20 +/- 0.10 0.26 +/- 0.11 0.23 +/- 0.07 Pass VE-2728,2729 8/25/2021 K-40 2.34 +/- 0.41 2.27 +/- 0.40 2.31 +/- 0.29 Pass DW-30238,30239 8/25/2021 Gr. Alpha 3.94 +/- 0.91 2.43 +/- 0.86 3.185 +/- 0.63 Pass DW-30238,30239 8/25/2021 Ra-226 2.57 +/- 0.24 1.83 +/- 0.24 2.20 +/- 0.17 Pass DW-30238,30239 8/25/2021 Ra-228 2.86 +/- 0.83 2.52 +/- 0.66 2.69 +/- 0.53 Pass SW-2641,2642 8/31/2021 H-3 289 +/- 92 310 +/- 93 300 +/-65 Pass VE-2858,2859 9/2/2021 K-40 8.36 +/- 0.41 8.02 +/- 0.47 8.19 +/- 0.31 Pass SG-2934,2935 9/13/2021 Pb-214 2.72 +/- 0.22 2.54 +/- 0.27 2.63 +/- 0.17 Pass SG-2934,2935 9/13/2021 Ac-228 3.16 +/- 0.39 3.22 +/- 0.58 3.19 +/- 0.35 Pass DW-30249,30250 9/17/2021 Ra-226 0.70 +/- 0.18 1.00 +/-0.17 0.85 +/- 0.12 Pass S-3042,3043 9/22/2021 K-40 7.55 +/- 0.80 7.57 +/- 0.81 7.56 +/- 0.57 Pass DW-30249,30250 9/17/2021 Ra-226 0.70+/-0.18 1.00 +/- 0.17 0.85 +/- 0.12 Pass S-3042,3043 9/22/2021 K-40 7.55 +/- 0.80 7.57 +/- 0.81 7.56 +/- 0.57 Pass DW-30256,30257 10/8/2021 Gr. Alpha 2.35 +/- 0.79 2.71 +/- 0.92 2.53 +/- 0.61 Pass S-3279,3280 10/11/2021 K-40 10.08 +/-0.58 9.18 +/- 0.53 9.63 +/- 0.39 Pass DW-30262,30263 10/14/2021 Ra-226 1.49 +/- 0.30 1.51 +/- 0.17 1.50 +/-0.17 Pass DW-30262,30263 10/14/2021 Ra-228 1.16 +/- 0.79 2.08 +/- 0.82 1.62 +/- 0.57 Pass AP-102521 A, B 10/25/2021 Gr. Beta 0.026 +/- 0.005 0.030 +/- 0.010 0.028 +/- 0.010 Pass XWW-3707,3708 10/27/2021 H-3 206 +/- 87 268 +/- 90 237 +/- 63 Pass AP-110121A,B 11/1/2021 Gr. Beta 0.017 +/- 0.004 0.016 +/- 0.00 0.016 +/- 0.003 Pass DW-30277,30278 11/5/2021 Gr. Alpha 10.11 +/- 1.19 9.72 +/- 1.11 9.92 +/- 0.81 Pass DW-30277,30278 11/5/2021 Gr .Beta 5.53 +/- 0.72 4.22 +/- 0.69 4.88 +/- 0.50 Pass DW-30277,30278 11/5/2021 Ra-226 6.27 +/- 0.32 6.34 +/- 0.37 6.31 +/- 0.25 Pass DW-30277,30278 11/5/2021 Ra-228 3.10 +/- 0.86 3.76 +/- 0.90 3.43 +/- 0.62 Pass AP-111521A,B 11/15/2021 Gr. Bet.a 0.022 +/- 0.004 0.026 +/- 0.005 0.024 +/- 0.003 Pass AP-112221A,B 11/22/2021 Gr. Beta 0.023 +/- 0.004 0.025 +/- 0.005 0.024 +/- 0.003 Pass AP-112921A,B 11/29/2021 Gr. Beta 0.038 +/- 0.005 0.035 +/- 0.005 0.037 +/- 0.004 Pass A-12

TABLE A-5. lntralaboratory "Duplicate" Samples Concentration" Averaged Lab Codeb Date Analysis First Result Second Result Result Acceptance DW-30297,8 12/15/2021 Ra-226 1.71 +/- 0.15 1.21 +/-0.13 1.46 +/- 0.10 Pass DW-30297,8 12/15/2021 Ra-228 2.44 +/- 0.98 1.96 +/- 0.97 2.20 +/- 0.69 Pass S-4182,4183 12/19/2021 Pb-214 1.19 +/- 0.06 1.07 +/- 0.08 1.13+/-0.05 Pass S-4182,4183 12/19/2021 Ac-228 1.08 +/- 0.11 1.15+/-0.14 1.12+/-0.09 Pass S-4182,4183 12/19/2021 K-40 1.75+/-0.74 1.80 +/- 0.84 1.78 +/- 0.56 Pass AP-122721A,B 12/27/2021 Gr. Beta 0.063 +/- 0.006 0.060 +/- 0.006 0.062 +/- 0.004 Pass AP-4350,4351 12/28/2021 Be-7 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.01 Pass AP-4845,4846 12/31/2021 Be-7 0.07 +/- 0.01 0.06 +/- 0.02 0.06 +/- 0.01 Pass Note: Duplicate analyses are performed on every twentieth sample received. Results are not listed for those analyses with activities that measure below the LLD.

  • Results are reported in units of pCi/L, except for air filters (pCi/Filter or pCi/m3), food products, vegetation, soil and sediment (pCi/g).

b AP (Air Particulate), AV (Aquatic Vegetation), BS (Bottom Sediment), CF (Cattle Feed), CH (Charcoal Canister),

DW (Drinking Water), E (Egg), F (Fish), G (Grass), LW (Lake Water), Ml (Milk), P (Precipitation), PM (Powdered Milk),

S (Solid), SG (Sludge), SO (Soil), SS (Shoreline Sediment), SW (Surface Water), SWT (Surface Water Treated),

SWU (Surface Water Untreated), VE (Vegetation), W (Water), WW (Well Water).

A-13

TABLEA-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

Concentration a Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MAAP-594 2/1/2021 Gross Alpha 1.30 +/- 0.08 1.77 0.53 - 3.01 Pass MAAP-594 2/1/2021 Gross Beta 0.81 +/- 0.04 0.649 0.325 - 0.974 Pass MADW-571 2/1/2021 Gross Alpha 0.73 +/- 0.06 0.87 0.26 -1.48 Pass MADW-572 2/1/2021 Gross Beta 2.38 +/- 0.06 2.50 1.25 - 3.75 Pass MASO-591 2/1/2021 Cs-134 -2.57 +/- 2.21 0 NA C Pass MASO-591 2/1/2021 Cs-137 1700 +/-20 1550 1085 - 2015 Pass MASO-591 2/1/2021 Co-57 977 +/-7 920 644 -1196 Pass MASO-591 2/1/2021 Co-60 1360 +/- 10 1370 959 -1781 Pass MASO-591 2/1/2021 Mn-54 0.91 +/- 2.85 0 NA C Pass MASO-591 2/1/2021 Zn-65 687 - 17 604 423 - 785 Pass MASO-591 2/1/2021 K-40 682 +/- 53 618 433 - 803 Pass MAW-569 2/1/2021 Cs-134 10.5 +/- 0:3 11.5 8.1 -15.0 Pass MAW-569 2/1/2021 Cs-137 8.53 +/- 0.32 7.9 5.5 -10.3 Pass MAW-569 2/1/2021 Co-57 12.2 +/- 0.3 11.4 8.0 - 14.8 Pass MAW-569 2/1/2021 Co-60 0.03 +/- 0.05 0 NA C Pass MAW-569 2/1/2021 Mn-54 16.5 +/- 0.4 15.5 10.9 -20.2 Pass MAW-569 2/1/2021 Zn-65 11.5 +/- 0.5 10.5 7.40 -13.7 Pass MAW-569 2/1/2021 K-40 9.93 +/- 1.42 0 NA C Fail d MAAP-592 2/1/2021 Cs-134 1.54 +/- 0.06 2.14 1.50 -2.78 Pass MAAP-592 2/1/2021 Cs-137 -0.011 +/- 0.020 0 NA C Pass MAAP-592 2/1/2021 Co-57 0.636 +/- 0.042 0.69 0.480 - 0.892 Pass MAAP-592 2/1/2021 Co-60 -0.64 +/- 0.02 0 NAC Fail e MAAP-592 2/1/2021 Mn-54 0.312 +/- 0.058 0.312 0.218 - 0.406 Pass MAAP-592 2/1/2021 Zn-65 0.41 +/- 0.07 0.352 0.246 - 0.458 Pass MAVE-588 2/1/2021 Cs-134 3.73 +/- 0.09 3.60 2.50 - 4.70 Pass MAVE-588 2/1/2021 ' Cs-137 5.69 +/- 0.10 4.69 3.28 - 6.10 Pass MAVE-588 2/1/2021 Co-57 6.23 +/- 0.07 5.05 3.54 - 6.57 Pass MAVE-588 2/1/2021 Co-60 3.29 +/- 0.06 2.99 2.09 - 3.89 Pass MAVE-588 2/1/2021 Mn-54 6.17 +/- 0.16 5.25 3.68 - 6.83 Pass MAVE-588 2/1/2021 Zn-65 -0.04 +/- 0.08 0 NA C Pass MAAP-3007 8/1/2021 Gross Alpha 0.45 +/- 0.04 0.960 0.288 - 1.632 Pass MAAP-3007 8/1/2021 Gross Beta 0.71 +/- 0.04 0.553 0.277 - 0.830 Pass MADW-2688 8/1/2021 Gross Alpha 0.19+/-0.03 0.232 0.070 - 0.394 Pass MADW-2688 8/1/2021 Gross Beta 2.60 +/- 0.06 2.807 1.404 - 4.211 Pass A-14

TABLEA-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP).

8 Concentration Reference Known Control Lab Code b Date Analysis Laboratory result Activity Limits c Acceptance MASO-3004 8/1/2021 Cs-134 1035 +/- 10 1170 819 - 1521 Pass MASO-3004 8/1/2021 Cs-137 628 +/- 11 572 400 - 744 Pass MASO-3004 8/1/2021 Co-57 -0.11 +/- 1.26 0 NA C Pass MASO-3004 8/1/2021 Co-60 720 +/-7 722 714-1326 Pass MASO-3004 8/1/2021 Mn-54 456 +/- 11 410 287 - 533 Pass MASO-3004 8/1/2021 Zn-65 1002 +/- 22 907 635 - 1179 Pass MASO-3004 8/1/2021 K-40 663 +/- 50 607 425 - 789 Pass MADW-3003 8/1/2021 Ra-226 0.32 +/- 0.06 0.226 0.158 - 0.294 Fail1 MADW-3003 8/1/2021 Sr-90 3.63 +/-0.16 3.9 2.70 - 5.02 Pass MADW-3003 8/1/2021 U-234 0.02 - 0.01 0.02 NA 9 Pass MADW-3003 8/1/2021 U-238 0.02 - 0.01 0.01 NA 9 Pass a Results are reported in units of Bq/kg (soil), Bq/L (water) or Sq/total sample (filters, vegetation).

b Laboratory codes as follows: MAW (water), MADW (water), MAAP (air filter), MASO (soil) and MAVE (vegetation).

c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". MAPEP does not provide control limits.

d The sample spectrum was reanalyzed utilizing the minimum data point background width method. The result was 1.59 +/- 1. 77 Bq/L which satisfies MAPEP criteria for a false positive test.

  • A decimal was misplaced in one of two cobalt-60 results while calculating a mean result causing MAPEP to fail the result as a statistically significant negative value at 3 standard deviations. The correct mean result (-0.0004 +/- 0.0186) is not a statistically significant negative value and would not have failed.

f Radium result did not meet MAPEP acceptance criteria.

9 Provided in the series for "sensitivity evaluation". MAPEP does not provide control limits.

A-15

TABLEA-7. lnterlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA)".

MRAD-30 Study Concentration

  • Lab Code b Date Analysis Laboratory ERA Control 0

Result Value Limits d Acceptance ERAP-722 3/22/2021 Cs-134 898 1030 668 - 1260 Pass ERAP-722 3/22/2021 Cs-137 181 163 134 -214 Pass ERAP-722 3/22/2021 Co-60 1270 1220 1040 -1550 Pass ERAP-722 3/22/2021 Mn-54 <4.3 < 50.0 0.00 - 50.0 Pass ERAP-722 3/22/2021 Zn-65 908 771 632 - 1180 Pass ERAP-722 3/22/2021 Sr-90 184 189 120 - 257 Pass ERAP-724 3/22/2021 Gross Alpha 88.4 96.1 50.2 - 158 Pass ERAP-724 3/22/2021 Gross Beta 74.1 62.6 38.0 -94.6 Pass

  • Results obtained by Environmental, Inc., Midwest Laboratory (EIML) as a participant in the crosscheck program for proficiency testing administered by Environmental Resource Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory code ERAP (air filter). Results are reported in units of (pCi/Filter).

c The ERA Assigned values for the air filter standards are equal to 100% of the parameter present in the standard as determined by the gravimetric and/or volumetric measurements made during standard preparation as applicable.

d The acceptance limits are established per the guidelines contained in the Department of Energy (DOE) report EML-564, Analysis of Environmental Measurements Laboratory (EML) Quality Assessment Program (QAP)

Data Determination of Operational Criteria and Control Limits for Performance Evaluation Purposes or ERA's SOP for the generation of Performance Acceptance Limits.

A-16

~~L ATI EQvirc>nmen~I, Inc.

,+1( !"'I Midwest Laboratory 70Q Landwehr Road* Noi:fhbrook, IL 60062c2310 phone (li47) 5$4-0700

  • fax (847) 564-4517 Appendix B Data Reporting Conventions

APPENDIX B. DATA REPORTING CONVENTIONS Data Reporting Conventions 1.0. All activities, except gross alpha and gross beta, are decay corrected to collection time or the end of the collection period.

2.0. Single Measurements Each single measurement is reported as follows: x +/-s where: x = value of the measurement; s = 2cr counting uncertainty (corresponding to the 95% confidence level).

In cases where the activity is less than the lower limit of detection L, it is reported as: < L, where L = the lower limit of detection based on 4.66cr uncertainty for a background sample.

3.0. Duplicate analyses If duplicate analyses are reported, the convention is as follows. :

3.1 Individual results: For two analysis results; x1 +/- s 1 and x2 +/- s2 Reported result: x +/- s; where x = (1/2) (x1 + x2 ) and s = (1/2) .Js~ + Si 3.2. Individual results: < L1 , < L2 Reported result: < L, where L = lower of L1 and L2 3.3. Individual results: x +/- s, < L Reported result: x+/-s if x ~ L; < L otherwise.

4.0. Computation of Averages and Standard Deviations 4.1 Averages and standard deviations listed in the tables are computed from all of the individual measurements over the period averaged; for examp~e, an annual standard deviation would not be the average of quarterly standard deviations. The average x and standard deviation "s" of a set of n numbers x 1, Xz ... xn are defined as follows:

4.2 Values below the highest lower limit of detection are not included in the average.

4.3 If all values in the averaging group are less than the highest LLD, the highest LLD is reported.

4.4 If all but one of the values are less than the highest LLD, the single value x and associated two sigma error is reported.

4.5 In rounding off, the following rules are followed:

4.5.1. If the number following those to be retained is less than 5, the number is dropped, and the retained numbers are kept unchanged. As an example, 11.443 is rounded off to 11.44.

4.5.2. If the number following those to be retained is equal to or greater than 5, the number is dropped and the last retained number is raised by 1. As an example, 11.445 is rounded off to 11.45.

B-1

~L AT.*1 E. nv. in>nm~ntal., Inc.

~ ~/'"\I Midwest Laboratory

' . 700, Landwehr RqarJ

  • N~hbroi/1<, IL 60062,2310 j:ihone (847) 564-0700
  • fax /847/ 564-4517 Appendix C Maximum permissible concentrations of radioactivity in air and water above natural background in unrestricted areas

APPENDIX C Table C-1. Maximum permissible concentrations of radioactivity in air and water above natural 8

background in unrestricted areas

  • 3 Air (pCi/m ) Water (pCi/L) 3 Gross alpha 1 X 1ff Strontium-89 8,000 Gross beta 1 Strontium-90 500 1

lodine-13l 2.8 X 10- Cesium-137 1,000 Barium-140 8,000 lodine-131 1,000 Potassium-40 c 4,000 Gross alpha 2 Gross beta 10 6

Tritium 1 X 10 a Taken from Table 2 of Appendix B to Code of Federal Regulations Title 10, Part 20, and appropriate footnotes.

Concentrations may be averaged over a period not greater than one year.

b Value adjusted by a factor of 700 to reduce the dose resulting from the air-grass-cow-milk-child pathway.

c A natural radionuclide.

C-1

~ Dominion

.;;, Energy 2021 Annual Radiological Environ01ental Operating Report Kewaunee Power Station Part IL Data Tabulations, Graphs and Analyses Dominion Energy Kewaunee, Inc.*

~*,/"\I

~

ATI Environmental, Midwest Laboratory Inc.

700 Land,iehr Road *Northbrool<. IL 60062-2310 pho.ne (847) 564-0700

  • fax (847) 564-4517 REPORT TO DOMINION NUCLEAR RADIOLOGICAL MONITORING PROGRAM FOR THE KEWAUNEE POWER STATION KEWAUNEE, WISCONSIN ANN.UAL REPORT - PART II DATA TABULATIONS AND ANALYSES January 1 to December 31, 2021 Prepared and submitted by ATI ENVIRONMENTAL, Inc.

Midwest Laboratory Project No. 8002 Approved:

Ashok Banavali, Ph.D. i£ niel J. Shannon Laboratory Manager Manage Radiological Protection and Chemistry, KPS

PREFACE Staff members of ATI Environmental, Inc., Midwest Laboratory were responsible for the acquisition of data presented in this report. Samples were collected by personnel of ATI Environmental, Inc., Midwest Laboratory and the Kewaunee Power Station.

ii

TABLE OF CONTENTS Section Page Preface ........~ ........................................................................................................:........................................ ii List of Figures .._...................................................................................................................................................... iv List of Tables........................................................................................................................................................ v

1.0 INTRODUCTION

......................................................................................................................................... 1 2.0 GRAPHS OF DATA TRENDS ..................................................................................................................... 6 3.0 DATA TABULATIONS ........................................................................................................................................ 15 iii

LIST OF FIGURES No. Caption Page Sampling locations, Kewaunee Power Station 2 2 Airborne particulates, weekly averages; gross beta, Location K-1f 7 3 Location K-2 7 4 Location K-8 7 5 Location K-43 8 6 Airborne particulates, gross beta, monthly averages, Location K-1f 9 7 Location K-2

  • 9 8 Location K-8 9 9 Location K-43 10 10 Well water, gross alpha in total residue, Location K-1 h 11 11 Location K-1t 11 12 Location K-1u 11 13 Well water, gross beta in total residue, Location K-1h 12 14 Location K-1t 12 15 Location K-1 u 12 16 Location K-13 12 17 Surface water, gross beta (total residue), Location K-1b 13 18 Location K-1d 13 19 Location K-1e 13 20 Location K-9 13 21 Surface water, tritium activity, Location K-1d 14 22 Location K-9 14 iv

LIST OF TABLES No. Title Pae Sampling locations, Kewaunee Power Station 3 2 Type and frequency of collection 4 3 Sample codes used in Table 2 5 Airborne particulates analysis for gross beta 4 Location K-1f 16 5 Location K-2 17 6 Location K-8 18 7 Location K-43 19 8 Airborne particulates, gross beta, monthly averages, minima and maxima 20 9 Airborne particulates, quarterly composites of weekly samples, analysis for gamma- 22 emitting isotopes 10 Ambient gamma radiation (TLD), quarterly exposure 24 11 Well water, analysis for gross alpha, gross beta, tritium, potassium-40, strontium-90 and 25 gamma-emitting isotopes.

12 Broad leaf Vegetation samples for gamma-emitting isotopes. 27 13 Cattle feed, analysis for gross beta, strontium-90, and gamma-emitting isotopes 28 14 Grass, analysis for gross beta, strontium-90, and gamma-emitting isotopes 30 15 Soil, analysis for gross alpha, gross beta, strontium-90 and gamma-emitting isotopes 33 16 Surface water, analysis for gross beta, potassium-40, and gamma-emitting isotopes 35 17 Surface water, analysis for tritium and strontium-90 40 18 Fish samples, analysis for gross beta, strontium-90, and gamma-emitting isotopes 41 19 Shoreline sediments, analysis for gross beta, strontium-90 and gamma-emitting isotopes 42 V

1.0 INTRODUCTION

The following constitutes Part II of the final report for the 2021 Radiological Monitoring Program conducted at the Kewaunee Power Station (KPS), Kewaunee, Wisconsin.

Included are tabulations of data for all samples collected in 2021 along with graphs of data trends. A summary and interpretation of the data presented here are published in Part I of the 2021 Annual Report on the Radiological Monitoring Program for the Kewaunee Power Station.

1

A L

J

<,;"1£

..,__w_.,..,,,,..

Figure 1. Environmental Sampling Locations 2

Table 1. Sam lin locations, Kewaunee Power Station.

Distance (miles)b Code T e" and Sector Location K-1 I Onsite K-1b 0.12 N Middle Creek K-1c 0.10 N 500' north of condenser discharge K-1d 0.10 E Condenser discharge K-1e 0.12 S South Creek K-1f 0.12 S Maintenance Waste Oil and Material Storage Building K-1h 0.12 NW North Well K-1j 0.10 S 500' south of condenser discharge K-1m 0.15 N ISFSI East K-1o 0.16 N ISFSI North K-1q 0.16 N ISFSI West K-1r 0.13 N ISFSI West K-1t 0.10 ESE Gatehouse K-1u 0.05.SSW Maintenance Building K-2 C 8.91 NNE WPS Operations Building in Kewaunee K-3C 1/C 5.9 N Lyle and John Siegmund Farm, N2815 Hwy 42, Kewaunee K-5 3.2 NNW Ed Paplham Farm, E4160 Old Settlers Rd, Kewaunee K-8 4.85WSW St. Isadore the Farmer Church, 18424 Tisch Mills Rd, Tisch Mills K-9 C 11.5 NNE Green Bay Municipal Pumping Station, six miles east of Green Bay (sample source is Lake Michigan water from Rostok Intake, two miles north of Kewaunee).

K-13 C 3.0 SSW Rand's General Store, Two Creeks K-17 4.0W Klimesh's Farm, N885 Tk B, Kewaunee K-23a 0.5W 0.5 miles west of plant, Kewaunee site K-23b 0.6 N - 0.6 miles north of plant, Kewaunee site K-25 1.9 SW Wotachek Farm, 3968 E. Cty Tk BB, Two Rivers K-26 C 9.1 SSW Wilfert Farms Vegetable Stand (9.1 miles south of "BB")

K-27 I 1.53 NW Schleis Farm, E4298 Sandy Bay Rd, Kewaunee K-30 0.8 N End of site boundary K-34 2.7 N Leon and Vicki Struck, N1549 Lakeshore Dr., Kewaunee K-35 C 6.71 WNW Duane Ducat, N1215 Sleepy Hollow Rd., Kewaunee K-38 2.45WNW Dave Sinkula Farm, N890 Town Hall Road, Kewaunee K-39 3.46 N Francis Wojta, N1859 Lakeshore Dr., Kewaunee K-43 2.71 SSW Gary Maigatter Property, 17333 Hwy 42, Two Rivers K-45 5.1 N Wakker's Dairy, N2348 Highway 42, Kewaunee aI =indicator; C =control.

b Distances are measured from reactor stack.

c Location K-3 is an indicator for ambient radiation and a control for soil, cattle feed and grass.

3

Table 2. Type and frequency of collection.

Location Weekly Quarterly Semiannually Annually K-1b SW GR" K-1c

- SS b K-1d SW Fl C K-1e SW K-1f AP 9 GR" TLD so K-1h WW K-1j SS b K-1m TLD K-1o TLD K-1q TLD K-1r TLD K-11 WWh K-1u WWh K-2 AP 9 TLD K-3 GR" TLD so CFd K-5 GR" TLD K-8 AP 9 TLD K-9 SW 1 SS b K-13 WW K-17 TLD K-23a BLV*

K-23b BLV" K-25 TLD K-26 BLV 0 K-27 TLD K-30 TLD K-34 GR" so CFd K-35 GR" so CFd K-38 GR" so CFd K-39 GR" TLD K-43 AP 9 TLD K-45 CFd

  • Three times a year, second third and fourth quarters.

b Collected in May and November.

° Collected in the third quarter.

d First quarter (January, February, March) only.

  • Alternate since milk sampling is no longer performed.

1 Two samples, raw and treated.

9 Frequency may be increased dependent on dust loading.

h Well water shall be taken when this source is tapped for drinking or irrigation purposes in areas where the hydraulic gradient or recharge properties are suitable for contamination.

4

Table 3. Sample Codes:

Code Description AP Airborne particulates BLV Broad leaf vegetation CF Cattle feed Fl Fish GR Grass SO Soil SW Surface water SS Shoreline Sediment TLD Thermoluminescent dosimeter WW Well water 5

2.0 GRAPHS OF DATA TRENDS Note: Conventions used in trending data.

The following conventions should be used in the interpretation of the graphs of data trends:*

1. Both solid and open data points may be used in the graphs. A solid point indicates an activity, an open point, a lower limit of detection (LLD) value.
2. Data points are connected by a solid line. A break in the plot indicates missing data.

6

KPS Air Particulates - Gross Beta 0.100 0.080 0.060 pCi/m3 .._

j 0.040 * (

V\

,,,J\\I

\ ... A ~ r.-- ~ I\ ,. .__ j 0.020*

"II

\I

" 'V r\ r

'ii

.I'\

\.-.,-9 V - - )/

Figure 2. Location K-1f (weekly samples, 2021).

0.100 0.080 0.060 pCi/m3 ~

0.040

  • I M /\ * ,,. ~

"

  • h 0.020 \* V \ I\_._ 'II

---,; ll.

A I\ ._

y A I\ r ~) \. I\ ~ I

\I

  • l..../ ¥ V llil V

Figure 3. Location K-2 (weekly samples, 2021).

0.100 0.080 0.060 pCi/m3 ,I

, ___ JI /1. j 0.040

. \ r-' \ !\ A /\ /

0.020

\- I ~ \ . "'11 '/\ y y

.-'\ / ..... '--..J \,) \

- ... .I,,/

" \/

'ii Figure 4. Location K-8 (weekly samples, 2021).

7

KPS Air Particulates - Gross Beta 0.100 0.080 0.060 pCi/m3 0.040 * . r N\ .,..I\ * . .... /

0.020 ~

Ii',

'Iv\ "- . IA ,I"..., Al-. ~

. \. ". .I I \ /"

'w \/

' r "' V "'-/

Figure 5. Location K-43 (weekly samples, 2021).

8

KPS Air Particulates - Gross Beta 0.080 0.060 pCi/m3 0.040 l\ ~ I 0.020 ~ ~~ I\ J~ " I\ "-,,/~

,.J \ "--1

~ "'-..__/ ~ V V

~

0.000 2017 2018 2019 2020 2021 2022 Figure 6. Location K-1f (month! averages, 2017-2021 ).

0.100 0.080 0.060 pCi/m3 0.040

..... I I I I\ I 0.020 ~ _,,,,..__r ~ A/ h "J \ ~

_j ~ ~

v-.-/

~

V \ ,,.,-1 V y -

V 0.000 "----"--'--'-'-

2017 2018 2019 2020 2021 2022 Figure 7. Location K-2 (monthly averages, 2017-2021 ).

0.100 0.080 0.060 pCi/m3 0.040

/' M

~ I\ -. I V'\ /\ JI\ . /-1 \ V ;"' '

A 0.020 y

'v---J \_/'-JV 'r'"

0.000 2017 2018 2019 2020 2021 2022 Figure 8. Location K-8 (monthly averages, 2017-2021).

9

KPS Air Particulates - Gross Beta 0.100 0.080 0.060 pCi/m3 0.040 0.020 j'----,._ /'-I' .,,. "--- I\ J

/~

~ "- I I\~ ..,... ~ "' - \ ~

J

~

~ ~

\J'-1 -v 0.000 2017 2018 2019 2020 2021 2022 Figure 9. Location K-43 (monthly averages, 2017-2021).

10

KPS Well Water - Gross Alpha Note: An open data point indicates activity less than the lower limit of detection (LLD).

6 +------------j--------t------------i---------------1----------1 pCi/L 4 +--------+---,<---~---------/-t--""-...:.c--------;f-->,c+---------1----------1 0 +---'~~---'--,~~~'--+~~~---'--,~~~t---~~~~-----i---_,_,.~~~~~--"-1-~~~-1-'-~---1 2017 2018 2019 2020 2021 2022 Figure 10. Location K-1h. Total Residue. Quarterly collection.

6+----------+-------+---------+-------------11------------i pCi/L 4 +------------t-------+-t----;---------7"'--+..,__-----------11------.::.-------,[

0 +--->-~~~~~,_,_--~~~~-+-+-"--~~-+-~--+--~~~-+-~__._,I-'---+-~--+------<

2017 2018 2019 2020 2021 2022 Figure 11. Location K-1 I. Total Residue. Quarterly collection.(lnitiated 1/1/18; sample taken only when source has been tapped for drinking or irrigation purposes.)

10 8

6 pCi/L 6

4 2

~/\ ~ ~

IA.______,

0 2017 2018 2019 2020 2021 2022 Figure 12. Location K-1 u. Total Residue. Quarterly collection.(lnitiated 1/2/18; sample taken only when source has been tapped for drinking or irrigation purposes.)

11

KPS Well Water - Gross Beta Note: An open data point indicates activity less than the lower limit of detection (LLD).

10 8

pCi/L 6

4 A ~ / ~I"-.

2 0

~

2017 2018

- /

2019

',/

2020

~

2021 2022 Figure 13. Location K-1h. Total Residue. Quarterly collection.

10 pCi/L 8 6

4

~

2 0----0

/ "'- ,,... ~

A V

/----

0 2017 2018 2019 2020 2021 2022 Figure 14. Location K-1t. Total Residue. Quarterly collection.(lnitiated 1/1/18; sample taken only when source has been tapped for drinking or irrigation purposes.)

10 8

pCi/L 6

  • ~

4

- ~

2 0

'v-'"

2017 2018 2019 2020 2021 2022 Figure 15. Location K-1 u. Total Residue. Quarterly collection.(lnitiated 1/2/18; sample taken only when source has been tapped for drinking or irrigation purposes.)

10 8

pCi/L 6

4 2 / I'-._

~/

/\\

-~

0 2017 2018


2019 2020 2021 2022 Figure 16. Location K-13. Total Residue. Quarterly collection.

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KPS Surface Water - Gross Beta 20 pCi/L 10 A ,.__ ...-,

0 2017 A

r--.......-,/ A\...J 2018 2019 r-,-....,

2020 2021 2022 Figure 17. Surface water. Middle Creek, Onsite K-1b.

20 pCi/L 10

~.~ ~

......,,. . ~

...... V* ...

0 2017 2018 2019 2020 2021 2022 Figure 18. Surface water. Lake Michigan, condenser discharge, Onsite K-1d.

  • Sample not available 3/4/19 due to frozen conditions. (CR#1890) 40 30 pCi/L 20 I\

10

. /\ \

0

~

2017

~ '~~

2018 2019

\

0-

. I J

2020

\_

2021

- 2022 Figure 19. Surface water. South Creek, Onsite K-1 e.

20 pCi/L 10 hA_..j\. ~

. ~

0 2017 2018 2019 2020 2021 2022 Figure 20. Surface water (raw). Lake Michigan, Rostek Intake K-9.

13

KPS Surface Water-Tritium 1000 800 600 pCi/L 400 200 - -

- '\.

0 2017 2018 2019 2020 2021 2022 Figure 21. Surface water. Lake Michigan, condenser discharge, K-1 d. Quarterly collection.

1000 ~ - - - - ~ - - - - - - - - - - - ~ - - - - - - - - - ~

800 +-------+---------l-------+-------+--------1 600 -+-------t----------+-------1--------+--------+

pCi/L 400 + - - - - - - - + - - - - - - - - + - - - - - - + - - - - - - - + - - - - - - - - +

0+-------+--------+-------+-------+---------1 2017 2018 2019 2020 2021 2022 Figure 22. Surface water. Lake Michigan, Rostok Intake, K-9. Quarterly collection.

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KPS Table 4. Airborne particulates, analyses for gross beta.

Location: K-1f Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Reguired LLD 0.010 Reguired LLD 0.010 01-05-21 299 0.042 +/- 0.004 07-06-21 303 0.020 +/- 0.003 01-12-21 304 0.032 +/- 0.004 07-13-21 302 0.012 +/- 0.003 01-19-21 301 0.038 +/- 0.004 07-19-21 267 0.019 +/- 0.003 01-26-21 303 0.016 +/- 0.003 07-27-21 339 0.025 +/- 0.003 02-02-21 303 0.026 +/- 0.004 08-03-21 302 0.018 +/- 0.003 02-09-21 301 0.031 +/- 0.004 08-10-21 308 0.027 +/- 0.004 02-16-21 305 0.033 +/- 0.004 08-17-21 302 0.022 +/- 0.003 02-23-21 301 0.040 +/- 0.004 08-24-2_1 297 0.027 +/- 0.004 03-02-21 300 0. 022 +/- 0. 003 08-31-21 303 0.026 +/- 0.004 03-09-21 303 0.033 +/- 0.004 09-07-21 303 0.022 +/- 0.003 03-16-21 302 0.029 +/- 0.003 09-14-21 305 0.023 +/- 0.003 03-23-21 302 0.026 +/- 0.004 09-21-21 299 0.023 +/- 0.003 03-30-21 303 0.015 +/- 0.003 09-28-21 302 0.019 +/- 0.003 1st Quarter Mean+/- s.d. 0.029 +/- 0.008 3rd Quarter Mean +/- s.d. 0.022 +/- 0.004 04-06-21 301 0.027 +/- 0.003 10-05-21 304 0.026 +/- 0.004 04-13-21 307 0.016 +/- 0.003 10-12-21 301 0.028 +/- 0.004 04-20-21 300 0.011 +/- 0.003 10-19-21 312 0.023 +/- 0.003 04-27-21 301 0.022 +/- 0.003 10-25-21 262 0.019 +/- 0.004 11-02-21 337 0.020 +/- 0.003 05-04-21 303 0.019 +/- 0.003 05-11-21 309 0.006 +/- 0.002 11-09-21 301 0.029 +/- 0.004 05-18-21 298 0.018 +/- 0.003 11-16-21 304 0.015 +/- 0.003 05-25-21 301 0.021 +/- 0.003 11-23-2.1 305 0.024 +/- 0.004 06-01-21 301 0.013 +/- 0.003 11-30-21 308 0.022 +/- 0.004 06-08-21 303 0.026 +/- 0.004 12-07-21 297 0.021 +/- 0.003 06-15-21 302 0.015 +/- 0.003 12-14-21 298 0.035 +/- 0.004 06-22-21 302 0.015 +/- 0.003 12-21-21 303 0.040 +/- 0.004 06-29-21 303 0.018 +/- 0.003 12-28-21 306 0.052 +/- 0.005 2nd Quarter Mean +/- s.d. 0.017 +/- 0.006 4th Quarter Mean +/- s.d. 0.027 +/- 0.010 Cumulative Average 0.024 16

KPS Table 5. Airborne particulates, analyses for gross beta.

Location: K-2 3

Units: pCi/m Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Reguired LLD 0.010 Reguired LLD 0.010 01-05-21 299 0.038 +/- 0.004 07-06-21 302 0.019 +/- 0.003 01-12-21 303 0.033 +/- 0.004 07-13-21 302 0.012 +/- 0.003 01-19-21 301 0.039 +/- 0.004 07-19-21 266 0.021 +/- 0.004 01-26-21 303 0.018 +/- 0.003 07-27-21 339 0.026 +/- 0.003 02-02-21 303 0.024 +/- 0.003 08-03-21 302 0.020 +/- 0.003 02-09-21 301 0.027 +/- 0.004 08-10-21 309 0.032 +/- 0.004 02-16-21 305 0.030 +/- 0.004 08-17-21 301 0.016 +/- 0.003 02-23-21 300 0.042 +/- 0.004 08-24-21 297 0.028 +/- 0.004 03-02-21 300 0.019 +/- 0.003 08-31-21 303 0.029 +/- 0.004 03-09-21 303 0.032 +/- 0.004 09-07-21 303 0.027 +/- 0.004 03-16-21 302 0.023 +/- 0.003 09-14-21 305 0.025 +/- 0.003 03-23-21 302 0.023 +/- 0.003 09-21-21 299 0.025 +/- 0.004 03-30-21 303 0.016 +/- 0.003 09-28-21 302 0.020 +/- 0.003 1st Quarter Mean+/- s.d. 0.028 +/- 0.008 3rd Quarter Mean +/- s.d. 0.023 +/- 0.006 04-06-21 301 0.028 +/- 0.003 10-05-21 304 0.033 +/- 0.004 04-13-21 307 0.017 +/- 0.003 10-12-21 301 0.032 +/- 0.004 04-20-21 300 0.014 +/- 0.003 10-19-21 312 0.029 +/- 0.004 04-27-21 301 0.023 +/- 0.003 10-25-21 262 0.021 +/- 0.004 11-02-21 337 0.019 +/- 0.003 05-04-21 303 0.018 +/- 0.003 05-11-21 309 0.004 +/- 0.002 11-09-21 301 0.036 +/- 0.004 05-18-21 298 0.020 +/- 0.003 11-16-21 304 0.016 +/- 0.003 05-25-21 301 0.026 +/- 0.004 11-23-21 306 0.019 +/- 0.003 .

06-01-21 301 0.016 +/- 0.003 11-30-21 308 0.023 +/- 0.004 06-08-21 302 0.034 +/- 0.004 12-07-21 297 0.016 +/- 0.003 06-15-21 302 0.015 +/- 0.003 12-14-21 299 0.035 +/- 0.004 06-22-21 302 0.014 +/- 0.003 12-21-21 303 0.035 +/- 0.004 06-29-21 ,303 0.022 +/- 0.003 12-28-21 307 0.057 +/- 0.005 2nd Quarter Mean +/- s.d. 0.019 +/- 0.008 4th Quarter Mean +/- s.d. 0.029 +/- 0.011 Cumulative Average 0.025 17

KPS Table 6. Airborne particulates, analyses for gross beta.

Location: K-8 Units: pCi/m 3 Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Reguired LLD 0.010 Reguired LLD 0.010 01-05-21 299 0.044 +/- 0.004 07-06-21 302 0.020 +/- 0.003 01-12-21 304 0.038 +/- 0.004 07-13-21 302 0.012 +/- 0.003 01-19-21 301 0.045 +/-. 0.004 07-19-21 267 0.022 +/- 0.004 01-26-21 303 0.020 +/- 0.003 07-27-21 339 0.027 +/- 0.003 02-02-21 303 0.023 +/- 0.003 08-03-21 302 0.018 +/- 0.003 8

02-09-21 301 0.035 +/- 0.004 08-10-21 ND 02-16-21 305 0.035 +/- 0.004 08-17-21 302 0.022 +/- 0.003 02-23-21 300 0.048 +/- 0.005 08-24-21 297 0.029 +/- 0.004 03-02-21 300 0.024 +/- 0.003 08-31-21 299 0.030 +/- 0.004 03-09-21 303 0.038 +/- 0.004 09-07-21 303 0.027 +/- 0.004 03-16-21 302 0:025 +/- 0.003 09-14-21 304 0.030 +/- 0.004 03-23-21 302 0.028 +/- 0.004 09-21-21 299 0.024 +/- 0.004 03-30-21 303 0.021 +/- 0.003 09-28-21 302 0.021 +/- 0.003 1st Quarter Mean +/- s.d. 0.033 +/- 0.010 3rd Quarter Mean +/- s.d. 0.024 +/- 0.005 04-06-21 301 0.030 +/- 0.003 10-05-21 304 0.033 +/- 0.004 04-13-21 307 0.017 +/- 0.003 10-12-21 301 0.039 +/- 0.004 04-20-21 300 0.013 +/- 0.003 10-19-21 312 0.027 +/- 0.004 04-27-21 301 0.023 +/- 0.003 10-25-21 262 0.019 +/- 0.004 11-02-21 337 0.023 +/- 0.003 05-04-21 303 0.019 +/- 0.003 05-11-21 309 0.006 +/- 0.002 11-09-21 301 0.040 +/- 0.004 05-18-21 299 0.017 +/- 0.003 11-16-21 304 0.017 +/- 0.003 05-25-21 301 0.023 +/- 0.003 11-23-21 306 0.019 +/- 0.003 06-01-21 301 0.016 +/- 0.003 11-30-21 308 0.022 +/- 0.004 06-08-21 303 0.030 +/- 0.004 12-07-21 297 0.025 +/- 0.004 06-15-21 302 0.020 +/- 0.004 12-14-21 298 0.034 +/- 0.004 06-22-21 302 0.014 +/- 0.003 12-21-21 302 0.040 +/- 0.004 06-29-21 303 0.017 +/- 0.003 12-28-21 306 0.052 +/- 0.005 2nd Quarter Mean +/- s.d. 0.019 +/- 0.007 4th Quarter Mean +/- s.d. 0.030 +/- 0.011 Cumulative Average 0.026 a ND - No data. Breaker found open. (CR# 2217) 18

KPS Table 7. Airborne particulates, analyses for gross beta.

Location: K-43 3

Units: pCi/m Collection: Continuous, weekly exchange.

Date Volume Date Volume Collected (m3) Gross Beta Collected (m3) Gross Beta Reguired LLD 0.010 Reguired LLD 0.010 01-05-21 299 0.038 +/- 0.004 07-06-21 303 0.018 +/- 0.003 01-12-21 304 0.033 +/- 0.004 07-13-21 302 0.015 +/- 0.003 01-19-21 301 0.042 +/- 0.004 07-19-21 267 0.019 +/- 0.003 01-26-21 303 0.020 +/- 0.003 07-27-21 339 0.024 +/- 0.003 02-02-21 303 0.026 +/- 0.004 08-03-21 302 0.021 +/- 0.003 02-09-21 301 0.032 +/- 0.004 08-10-21 308 0.026 +/- 0.004 02-16-21 305 0.033 +/- 0.004 08-17-21 302 0.019 +/- 0.003 02-23-21 301 0.041 +/- 0.004 08-24-21 297 0.031 +/- 0.004 03-02-21 300 0.023 +/- 0.003 08-31-21 303 0.028 +/- 0.004 03-09-21 303 0.032 +/- 0.004 09-07-21 303 0.025 +/- 0.003 03-16-21 302 0.023 +/- 0.003 09-14-21 304 0.027 +/- 0.004 03-23-21 302 0.027 +/- 0.004 09-21-21 299 0.027 +/- 0.004 03-30-21 303 0.015 +/- 0.003 09-28-21 302 0.021 +/- 0.003 1st Quarter Mean+/- s.d. 0.030 +/- 0.008 3rd Quarter Mean +/- s.d. 0.023 +/- 0.005 04-06-21 301 0.026 +/- 0.003 10-05-21 304 0.030 +/- 0.004 04-13-21 307 0.019 +/- 0.003 10-12-21 301 0.032 +/- 0.004 04-20-21 300 0.010 +/- 0.003 10-19-21 312 0.029 +/- 0.004 04-27-21 301 0.022 +/- 0.003 10-25-21 262 0.022 +/- 0.004 11-02-21 337 0.020 +/- 0.003 05-04-21 303 0.018 +/- 0.003 05-11-21 309 0.005 +/- 0.002 11-09-21 301 0.035 +/- 0.004 05-18-21 298 0.017 +/- 0.003 11-16-21 304 0.018 +/- 0.003 05-25-21 301 0.020 +/- 0.003 11-23-21 306 0.020 +/- 0.003 06-01-21 301 0.017 +/- 0.003 11-30-21 308 0.026 +/- 0.004 06-08.-21 303 0.028 +/- 0.004 12-07-21 297 0.019 +/- 0.003 06-15-21 302 0.016 +/- 0.003 12-14-21 298 0.032 +/- 0.004 06-22-21 302 0.013 +/- 0.003 12-21-21 303 0.036 +/- 0.004 06-29-21 304 0.020 +/- 0.003 12-28-21 306 0.047 +/- 0.005 2nd Quarter Mean +/- s.d. 0.018 +/- 0.006 4th Quarter Mean +/- s.d. 0.028 +/- 0.008 Cumulative Average 0.025 19

KPS Table 8. Airborne particulate data, gross beta analyses, monthly averages, minima and maxima.

January April Location Average Minima Maxima Location Average Minima Maxima Indicators 0.032 0.016 0.045 Indicators 0.020 0.010 0.027 K-1f 0.031 0.016 0.042 K-1f 0.019 0.011 0.027 K-8 0.034 0.020 0.045 K-8 0.021 0.011 0.027 K-43 0.032 0.020 0.042 K-43 0.019 0.010 0.026 Controls 0.030 0.018 0.039 Controls 0.021 0.014 0.028 K-2 0.030 0.018 0.039 K-2 0.021 0.014 00028 February May Location Average Minima Maxima Location Average Minima Maxima Indicators 0.033 0.022 0.048 Indicators 0.015 0.005 0.023 K-1f 0.032 0.022 0.040 K-1f 0.015 0.006 0.021 K-8 0.036 0.024 0.048 K-8 0.016 0.006 0.023 K-43 0.032 0.023 0.041 K-43 0.015 0.005 0.020 Controls 0.030 0.019 0.042 Controls 0.017 0.004 0.026 K-2 0.030 0.019 0.042 K-2 0.017 0.004 0.026 March June Location Average Minima Maxima Location Average Minima Maxima Indicators 0.026 0.015 0.D38 Indicators 0.019 0.013 0.030 K-1f 0.026 0.015 0.033 K-1f 0.019 0.015 0.026 K-8 0.028 0.021 0.038 K-8 0.020 0.014 0.030 K-43 0.024 0.015 0.032 K-43 0.019 0.013 0.028 Controls Controls 0.021 0.014 0.034 K-2 0.024 0.016 0.032 K-2 0.021 0.014 0.034 Note: Samples collected on the first, second or third day of the month are grouped with data of the previous month.

20

KPS Table 8. Airborne particulate data, gross beta analyses, monthly averages, minima and maxima, (continued)

July October Location Average Minima Maxima Location Average Minima Maxima Indicators 0.019 0.012 0.027 Indicators 0.026 0.019 0.039 K-1f 0.019 0.012 0.025 K-1f 0.023 0.019 0.028 K-8 0.020 0.012 0.027 K-8 0.028 0.019 0.039 K-43 0.019 0.015 0.024 K-43 0.027 0.020 0.032 Controls 0.020 0.012 0.026 Controls 0.027 0.019 0.033 K-2 0.020 0.012 0.026 K-2 0.027 0.019 o.633 August November Location Average Minima Maxima Location Average Minima Maxima Indicators 0.026 0.019 0.031 Indicators 0.024 0.015 0.040 K-1f 0.026 0.022 0.027 K-1f 0.023 0.015 0.029 K-8 0.027 0.022 0.030 K-8 0.025 0.017 0.040 K-43 0.026 0.019 0.031 K-43 0.025 0.018 0.035 Controls 0.026 0.016 0.032 Controls 0.024 0.016 0.036 K-2 0.026 0.016 0.032 K-2 0.024 0.016 0.036 September December Location Average Minima Maxima Location Average Minima Maxima Indicators 0.024 0.019 0.030 Indicators 0.036 0.019 0.052 K-1f 0.022 0.019 0.023 K-1f 0.037 0.021 0.052 K-8 0.026 0.021 0.030 K-8 0.038 0.025 0.052 K-43 0.025 0.021 0.027 K-43 0.034 0.019 0.047 Controls 0.024 0.020 0.027 Controls 0.036 0.016 0.057 K-2 0.024 0.020 0.027 K-2 0.036 0.016 0.057 Note: Samples collected on the first, second or third day of the month are grouped with data of the previous month.

21

KPS Table 9. Airborne particulate samples, quarterly composites of weekly samples, analysis for gamma-emitting isotopes.

Sample Description and Concentration (pCi/m 3 )

1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Indicator K-1f Lab Code KAP- 1007 KAP- 2164 KAP- 3376 KAP- 4350 3

Volume (m ) 3927 3931 3932 3938 Be-7 0.082 +/- 0.014 0.096 +/- 0.013 0.081 +/- 0.015 0.057 +/- 0.018 Nb-95 < 0.0010 < 0.0009 < 0.0010 < 0.0016 Zr-95 < 0.0020 < 0.0014 < 0.0021 < 0.0014 Ru-103 < 0.0013 < 0.0010 < 0.0011 < 0.0015 Ru-106 < 0.0087 < 0.0077 < 0.0070 < 0.0060 Cs-134 < 0.0009 < 0.0008 < 0.0010 < 0.0009 Cs-137 < 0.0010 < 0.0009 < 0.0007 < 0.0005 Ce-141 < 0.0019 < 0.0018 < 0.0014 < 0.0032 Ce-144 < 0.0043 < 0.0034 < 0.0047 < 0.0037 K-8 Lab Code KAP- 1010 KAP- 2166 KAP- 3378 KAP- 4353 3

Volume (m ) 3926 3932 3618 3938 Be-7 0.089 +/- 0.019 0.097 +/- 0.019 0.091 +/- 0.017 0.072 +/- 0.019 Nb-95 < 0.0021 < 0.0005 < 0.0011 < 0.0009 Zr-95 < 0.0023 < 0.0017 < 0.0025 < 0.0022 Ru-103 < 0.0017 < 0.0012 < 0.0015 < 0.0015 Ru-106 < 0.0089 < 0.0079 < 0.0085 < 0.0081 Cs-134 < 0.0007 < 0.0009 < 0.0009 < 0.0009 Cs-137 < 0.0010 <- 0.0009 < 0.0008 < 0.0007 Ce-141 < 0.0031 < 0.0019 < 0.0021 < 0.0033 Ce-144 < 0.0049 < 0.0048 < 0.0044 < 0.0055 22

KPS Table 9. Airborne particulate samples, quarterly composites of weekly samples, analysis for gamma-emitting isotopes, (continued).

Sample Description and Concentration (pCi/m 3) 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Indicator K-43 Lab Code KAP- 1011 KAP- 2167 KAP- 3379 KAP- 4353 3

Volume (m ) 3927 3932 3931 3939 Be-7 0.086 +/- 0.016 0.105 +/- 0.017 0.107 +/- 0.018 0.072 +/- 0.019 Nb-95 < 0.0010 < 0.0010 < 0.0008 < 0.0009 Zr-95 < 0.0025 < 0.0016 < 0.0020 < 0.0022 Ru-103 < 0.0017 < 0.0010 < 0.0009 < 0.0015 Ru-106 < 0.0043 < 0.0076 < 0.0067 < 0.0081 Cs-134 < 0.0008 < 0.0008 < 0.0008 < 0.0009 Cs-137 < 0.0004 < 0.0008 < 0.0006 < 0.0007 Ce-141 < 0.0030 < 0.0014 < 0.0018 < 0.0033 Ce-144 < 0.0053 < 0.0052 < 0.0033 < 0.0055 Control K-2 Lab Code KAP- 1008 KAP- 2165 KAP- 3377 KAP- 4352 3

Volume (m ) 3925 3930 3930 3941 Be-7 0.073 +/- 0.016 0.102 +/- 0.018 0.097 +/- 0.018 0.074 +/- 0.016 Nb-95 < 0.0007 < 0.0007 < 0.0016 < 0.0019 Zr-95 < 0.0013 < 0.0016 < 0.0015 < 0.0018 Ru-103 < 0.0007 < 0.0009 < 0.0009 < 0.0012 Ru-106 < 0.0085 < 0.0063 < 0.0078 < 0.0081 Cs-134 < 0.0010 < 0.0011 < 0.0009 < 0.0009 Cs-137 < 0.0006 < 0.0006 < 0.0010 < 0.0008 Ce-141 < 0.0016 < 0.0009 < 0.0017 < 0.0026 Ce-144 < 0.0030 < 0.0028 < 0.0042 < 0.0047 23

KPS Table 10. Ambient gamma radiation (TLD), quarterly exposure.

1st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Date Placed 01-04-21 04-01-21 07-01-21 10-04-21 Date Removed 04-01-21 07-01-21 10-04-21 01-03-22 mR/91 days Indicator Mean+s.d.

K-1f 14.2 +/- 0.6 14.4 +/- 0.7 13.7 +/-0.7 15.0 +/- 0.8 14.3 +/- 0.5 K-3 16.1 +/- 0.7 15.3 +/- 0.6 16.2 +/- 0.7 17.6 +/-0.7 16.3 +/- 1.0 K-5 15.7 +/- 0.7 16.9 +/- 0.7 15.5 +/- 0.6 15.6 +/- 0.6 15.9 +/- 0.7 K-8 15.4 +/- 0.8 16.6 +/- 0.7 16.3 +/- 0.9 18.5 +/- 0.8 16.7 +/- 1.3 K-17 17.6+/-1.0 18.4 +/- 1.0 17.6 +/-0.5 18.2 +/- 1.1 18.0 +/- 0.4 K-25 16.7 +/- 0.8 18.6 +/- 0.7 18.4 +/-0.7 20.6 +/- 1.1 18.6 +/- 1.6 K-27 16.3 +/- 0.4 16.8 +/- 0.6 17.2 +/- 0.3 18.7 +/- 0.7 17.3+/-1.0 K-30 16.2 +/- 0.9 15.5 +/- 0.8 15.4 +/- 0.8 16.2 +/- 1.0 15.8 +/- 0.4 K-39 16.1 +/- 0.8 17.2 +/- 0.6 16.8 +/-0.7 19.4 +/- 1.0 17.4+/-1.4 K-43 13.8 +/- 0.8 13.4 +/- 0.7 14.2 +/- 1.0 15.3 +/- 0.8 14.2 +/- 0.8 Mean+/- s.d. 15.8+/-1.1 16.3 +/- 1.7 16.1 +/- 1.5 17.5 +/- 1.9 16.4 +/-0.7 Control K-2 15.9 +/- 0.6 15.9 +/- 0.5 16.0 +/- 0.6 18.1 +/- 0.7 16.5 +/- 1.1 Mean+/- s.d. 15.9 +/- 0.6 15.9 +/- 0.5 16.0 +/- 0.6 18.1 +/- 0.7 16.5+/-1.1 Inside the Protected Area Date Placed 01-04-21 04-01-21 07-01-21 09-29-21 Date Removed 04-01-21 07-01-21 09-29-21 12-29-21 Mean+s.d.

K-1m 136.2 +/- 6.4 155.4 +/- 8.3 138.0 +/-7.1 160.9 +/- 9.5 147.6 +/- 12.4 K-1o 121.9 +/- 1.3 137.0 +/- 5.2 136.2 +/- 3.0 140.3 +/- 3.4 133.9 +/- 8.2 K-1q 19.2 +/- 1.3 21.7+/-0.5 21.8 +/- 1.7 24.2 +/- 0.4 21.7 +/- 2.0 K-1 r 15.2 +/- 1.0 18.5 +/- 0.6 16.7 +/- 0.6 20.5 +/- 1.3 17.7 +/-2.3 Mean+/- s.d. 73.1 +/- 64.9 83.2 +/- 73.2 78.2 +/- 68.1 86.5 +/- 74.5 80.3 +/- 5.9 24

KPS Table 11. Well water, analyses for gross alpha, gross beta, tritium, strontium-90, potassium-40 and gamma-emitting isotopes.

Collection: Quarterly.

Sample Description and Concentration (pCi/L)

Indicator K-1h Date Collected 01-04-21 04-01-21 07-01-21 10-04-21 Lab Code KWW- 1 KWW- 826 KWW- 2017 KWW- 3188 Gross alpha < 2.4 2.0 +/- 1.4 < 1.8 2.1 +/- 1.2 Gross beta 2.1 +/- 1.2 < 1.7 < 1.7 < 1.6 H-3 < 153 < 156 < 159 < 159 Sr-90 < 0.5 < 0.4 < 0.5 < 0.5 K-40 (ICP) 1.80 1.48 1.48 1.64 Mn-54 < 1.8 < 2.2 < 2.3 < 3.1 Fe-59 < 3.1 < 3.0 < 7.2 < 7.1 Co-58 < 2.9 < 1.7 < 3.7 < 3.7 Co-60 < 1.7 < 2.1 < 2.8 < 4.1 Zn-65 < 6.6 < 3.5 < 4.6 < 5.9 Zr-Nb-95 < 4.0 < 3.1 < 3.4 < 5.9 Cs-134 < 3.9 < 3.5 < 3.8 < 4.6 Cs-137 < 2.3 < 3.0 < 1.3 < 4.6 Ba-La-140 < 3.9 < 5.4 < 3.3 < 3.1 K-1t Date Collected 01-04-21 04-01-21 07-01-21 10-04-21 Lab Code KWW-2 KWW- 827 KWW- 2018 KWW- 3189 Gross alpha < 2.6 < 4.0 < 2.1 2.7 +/- 1.7 Gross beta < 1.6 < 3.7 < 1.5 2.1 +/- 1.2 H-3 < 158 < 156 < 159 < 159 K-40 (ICP) 3.12 2.79 3.03 2.87 Mn-54 < 2.5 < 2.6 < 2.9 < 1.5 Fe-59 < 4.7 < 6.4 < 5.5 < 4.6 Co-58 < 2.2 < 3.3 < 2.8 < 2.2 Co-60 < 4.0 < 1.8 < 2.1 < 2.4 Zn-65 < 9.7 < 4.1 < 2.5 < 1.9 Zr-Nb-95 < 4.2 < 2.4 < 2.4 < 3.0 Cs-134 < 4.2 < 4.6 < 2.6 < 2.2 Cs-137 < 2.3 < 3.7 < 3.0 < 2.5 Ba-La-140 < 4.9 < 7.4 < 1.6 < 11.7 25

KPS Table 11. Well water, analyses for gross alpha, gross beta, tritium, strontium-90, potassium-40 and gamma-emitting isotopes (continued).

Collection: Quarterly.

Sample Description and Concentration (pCi/L)

Indicator K-1u Date Collected 01-04-21 04-01-21 07-01-21 10-04-21 Lab Code KWW-3 KWW- 828 KWW- 2019 KWW- 3190 Gross alpha < 1.9 < 4.0 1.7 +/- 0.9 < 1.1 Gross beta < 1.6 < 3.4 1.8 +/- 0.6 1.4+/- 0.6 H-3 < 153 < 156 < 159 < 159 K-40 (ICP) 1.39 1.48 1.31 1.39 Mn-54 < 2.3 < 1.7 < 2.9 < 2.4 Fe-59 < 3.3 < 3.5 < 3.8 < 7.3 Co-58 < 1.7 < 4.2 < 2.4 < 2.6 Co-60 < 2.3 < 4.4 < 2.0 < 2.6 Zn-65 < 5.8 < 3.2 < 3.8 < 2.2 Zr-Nb-95 < 3.0 < 1.9 < 3.0 < 3.7 Cs-134 < 2.9 < 3.6 < 3.1 < 2.6 Cs-137 < 3.1 < 3.6 < 3.8 < 3.0 Ba-La-140 < 2.8 < 7.3 < 7.4 < 15.5 Control K-13 Date Collected 01-04-21 04-01-21 07-01-21 10-04-21 a

Lab Code KWW-4 KWW- 829 KWW- 2020 KWW- 3191 Gross beta < 1.0 < 1.8 1.0 +/- 0.5 < 0.7 H-3 < 153 < 156 < 159 < 159 K-40 (ICP) 1.15 1.07 0.98 1.07 Mn-54 < 5.5 < 3.6 < 4.0 < 1.5 Fe-59 < 5.4 < 6.4 < 9.0 < 6.0 Co-58 < 4.2 < 4.7 < 4.3 < 2.5 Co-60 < 6.2 < 3.9 < 2.3 < 1.7 Zn-65 < 14.2 < 9.6 < 6.4 <' 1.8 Zr-Nb-95 < 7.6 < 8.3 < 3.7 < 3.0 Cs-134 < 5.8 < 4.5 < 4.5 < 2.3 Cs-137 < 6.4 < 4.3 < 4.1 < 2.4 Ba-La-140 < 6.1 < 7.8 < 11.4 < 12.4 a Location K-43 substituted for this collection due to the sickness of the owner of location K-13 26

KPS Table 12. Broad leaf vegetation samples, analyses for gamma-emitting isotopes.

Annual collection.

Sample Description and Concentration (pCi/g wet)

Indicator Location K-23a K-23b Date Collected 08-02-21 08-02-21 Lab Code KVE- 2454 KVE- 2455 Type Broadleaf Veg. Broadleaf Veg.

Be-7 2.43 +/- 0.36 1.57 +/- 0.27 K-40 3.98 +/- 0.47 10.11 +/- 0.59 Nb-95 < 0.023 < 0.027 Zr-95 < 0.026 < 0.033 Ru-103 < 0.021 < 0.023 Ru-106 < 0.143 < 0.207 Cs-134 < 0.023 < 0.022 Cs-137 < 0.025 < 0.017 Ce-141 < 0.037 < 0.040 Ce-144 < 0.166 < 0.140 Control Location K-26 Date Collected 09-01-21 Lab Code KVE- 2808 Type Cabbage Be-7 < 0.08 K-40 2.39 +/- 0.22 Nb-95 < 0.006 Zr-95 < 0.013 Ru-103 < 0.007 Ru-106 < 0.078 Cs-134 < 0.009 Cs-137 < 0.005 Ce-141 < 0.022 Ce-144 < 0.048 27

KPS Table 13. Cattlefeed, analyses for gross beta, strontium-90, and gamma-emitting isotopes.

Collection: First Quarter Sample Description and Concentration (pCi/g wet)

Control Location K-3 K-35 K-3 K-35 Date Collected 01-04-21 01-04-21 01-04-21 01-04-21 Lab Code KCF- 5 KCF- 7 KCF- 9 KCF- 11 Type Hay Hay Silage Silage Gross beta 18.20 +/- 0.53 5.67 +/- 0.50 2.43 +/- 0.07 16.08 +/- 0.44 Sr-90 < 0.003 < 0.011 < 0.001 0.004 +/- 0.002 Be-7 0.64 +/- 0.124 1.98 +/- 0.456 0.27 +/- 0.104 < 0.112 K-40 13.43 +/- 0.52 5.87 +/- 0.77 3.05 +/- 0.25 10.76 +/- 0.52 Nb-95 < 0.012 < 0.034 < 0.012 < 0.013 Zr-95 < 0.020 < 0.042 < 0.015 < 0.027 Ru-103 < 0.007 < 0.028 < 0.006 < 0.011 Ru-106 < 0.092 < 0.226 < 0.075 < 0.117 Cs-134 < 0.010 < 0.032 < 0.010 < 0.014 Cs-137 < 0.011 < 0.030 < 0.006 < 0.011 Ce-141 < 0.018 < 0.038 < 0.020 < 0.021 Ce-144 < 0.084 < 0.251 < 0.066 < 0.083 Indicator Location K-34 K-34 K-38 K-38 Date Collected 01-04-21 01-04-21 01-04-21 01-04-21 Lab Code KCF- 6 KCF- 10 KCF- 8 KCF- 12 Type Hay Silage Hay Silage Gross beta 25.15 +/- 0.71 2.39 +/- 0.10 15.96 +/- 0.60 8.14 +/- 0.29 Sr-90 0.003 +/- 0.001 0.001 +/- 0.001 < 0.007 0.004 +/- 0.002 Be-7 1.21 +/- 0.175 0.53+/-0.112 < 0.223 < 0.182 K-40 6.08 +/- 0.39 2.42 +/- 0.25 11.80 +/- 1.13 6.83 +/- 0.49 Nb-95 < 0.016 < 0.009 < 0.040 < 0.014 Zr-95 < 0.012 < 0.017 < 0.048 < 0.026 Ru-103 < 0.009 < 0.009 < 0.037 < 0.011 Ru-106 < 0.097 < 0.082 < 0.316 < 0.086 Cs-134 < 0.012 < 0.011 < 0.042 < 0.015 Cs-137 < 0.014 < 0.008 < 0.036 < 0.014 Ce-141 < 0.025 < 0.021 < 0.066 < 0.025 Ce-144 < 0.081 < 0.057 < 0.313 < 0.063 28

KPS Table 13. Cattlefeed, analyses for gross beta, strontium-90, and gamma-emitting isotopes (continued).

Collection: First Quarter Sample Description and Concentration (pCi/g wet)

Indicator Location K-45 K-45 Date Collected 08-02-21 08-02-21 Lab Code KCF- 2452" KCF- 2453 a Type Hay Silage Gross beta 18.74 +/- 0.86 11.84 +/- 0.33 Sr-90 < 0.025 < 0.003 Be-7 < 0.278 0.43 +/- 0.120 K-40 14.91 +/- 0.83 9.65 +/- 0.47 Nb-95 < 0.018 < 0.019 Zr-95 < 0.033 < 0.018 Ru-103 < 0.024 < 0.011 Ru-106 < 0.251 < 0.134 Cs-134 < 0.024 < 0.014 Cs-137 < 0.023 < 0.012 Ce-141 < 0.042 < 0.025 Ce-144 < 0.194 < 0.103

  • Collection was delayed due to a suspension of dairy activities at both locations K-5 and and K-39.

Samples were collected at new location, K-45, close to locations K-5 and K-39 (CR#2182).

29

KPS Table 14. Grass, analyses for gross beta, strontium-90, and gamma-emitting isotopes.

Collection: Quarterly, April through December Units: pCi/g wet Sample Description and Concentration (pCi/g wet)

Indicator Location K-1b K-1f K-5 K-34 Date Collected 06-01-21 06-01-21 06-01-21 06-01-21 Lab Code KG- 1597 KG- 1598 KG- 1600 KG- 1601 Gross beta 7.26 +/- 0.21 8.02 +/- 0.23 8.76 +/- 0.24 7.93 +/- 0.22 Sr-90 < 0.002 < 0.002 < 0.002 0.001 +/- 0.001 Be-7 0.90 +/- 0.27 0.91 +/- 0.31 1.54 +/- 0.25 0.80 +/- 0.21 K-40 8.28 +/- 0.67 9.62 +/- 0.85 10.74 +/- 0.67 8.90 +/- 0.71 Mn-54 < 0.016 < 0.025 < 0.015 <0.019 Co-58 < 0.016 < 0.020 < 0.018 < 0.014 Co-60 < 0.020 < 0.024 < 0.014 < 0.010 Nb-95 <0.016 < 0.031 < 0.023 < 0.019 Zr-95 < 0.027 < 0.032 < 0.019 < 0.038 Ru-103 <0.019 < 0.028 < 0.016 < 0.021 Ru-106 < 0.141 < 0.302 < 0.114 < 0.139 Cs-134 < 0.024 < 0.034 <0.018 < 0.020 Cs-137 < 0.022 < 0.029 < 0.021 < 0.024 Ce-141 < 0.050 < 0.060 < 0.042 < 0.049 Ce-144 <0.134 < 0.267 < 0.103 <0.144 Indicator Control Location K-38 K-39 K-3 K-35 Date Collected 06-01-21 06-01-21 06-01-21 06-01-21 Lab Code KG- 1603 KG- 1604 KG- 1599 KG- 1602 Gross beta 9.88 +/- 0.27 4.21 +/- 0.18 9.02 +/- 0.24 8.12 +/- 0.23 Sr-90 < 0.002 < 0.002 < 0.003 < 0.002 Be-7 1:38 +/- 0.42 2.00 +/- 0.42 0.52 +/- 0.17 0.83 +/- 0.22 K-40 9.53 +/- 0.79 9.25 +/- 0.89 6.08 +/- 0.47 7.32 +/- 0.62 Mn-54 < 0.035 < 0.033 < 0.016 < 0.015 Co-58 < 0.032 < 0.042 < 0.018 < 0.009 Co-60 < 0.027 <0.015 < 0.016 < 0.019 Nb-95 < 0.029 < 0.033 < 0.019 < 0.014 Zr-95 < 0.050 < 0.040 < 0.027 < 0.037 Ru-103 < 0.032 < 0.045 < 0.016 < 0.021 Ru-106 < 0.323 < 0.278 < 0.194 < 0.155 Cs-134 < 0.028 < 0.033 < 0.016 < 0.020 Cs-137 < 0.035 < 0.049 < 0.010 < 0.015 Ce-141 < 0.043 < 0.075 < 0.037 < 0.032 Ce-144 < 0.194 < 0.253 <0.121 < 0.124 30

KPS Table 14. Grass, analyses for gross beta, strontium-90, and gamma-emitting isotopes (continued).

Collection: Quarterly, April through December Units: pCi/g wet Sample Description and Concentration (pCi/g wet)

Indicator Location K-1b K-1f K-5 K-34 Date Collected 08-02-21 08-02-21 08-02-21 08-02-21 Lab Code KG- 2443 KG- 2444 KG- 2447 KG- 2448 Gross beta 5.40 +/- 0.17 5.07 +/- 0.20 8.62 +/- 0.24 8.29 +/- 0.33 Sr-90 < 0.002 < 0.002 < 0.002 < 0.003 Be-7 2.51 +/- 0.24 2.46 +/- 0.24 1.03 +/- 0.23 7.89 +/- 0.30 K-40 4.29 +/- 0.40 4.29 +/- 0.38 6.74 +/- 0.48 6.53 +/- 0.36 Mn-54 < 0.011 < 0.010 <0.017 < 0.019 Co-58 < 0.012 < 0.010 < 0.015 < 0.012 Co-60 < 0.015 < 0.013 < 0.013 < 0.015 Nb-95 < 0.022 < 0.013 < 0.018 < 0.021 Zr-95 < 0.020 < 0.022 < 0.017 < 0.029 Ru-103 < 0.020 < 0.020 < 0.016 < 0.018 Ru-106 < 0.138 < 0.088 < 0.120 <0.160 Cs-134 < 0.017 < 0.016 < 0.017 < 0.017 Cs-137 < 0.018 < 0.013 < 0.016 < 0.021 Ce-141 < 0.022 < 0.034 < 0.036 < 0.025 Ce-144 < 0.140 < 0.085 < 0.136 < 0.094 Indicator Control Loc_ation K-38 K-39 K-3 K-35 Date Collected 08-02-21 08-02-21 08-02-21 08-02-21 Lab Code KG- 2450 KG- 2451 KG- 2445 KG- 2449 Gross beta 9.42 +/- 0.28 5.11 +/- 0.20 8.40 +/- 0.25 8.72 +/- 0.24 Sr-90 < 0.002 < 0.002 < 0.003 < 0.003 Be-7 2.92 +/- 0.35 5.64 +/- 0.24 1.91 +/- 0.24 1.12 +/- 0.29 K-40 7.74 +/- 0.59 6.42 +/- 0.30 7.06 +/- 0.50 8.43 +/- 0.70 Mn-54 < 0.023 < 0.014 < 0.010 < 0.021 Co-58 < 0.017 < 0.011 < 0.012 < 0.028 Co-60 < 0.011 < 0.013 < 0.018 < 0.023 Nb-95 < 0.015 < 0.014 < 0.020 < 0.018 Zr-95 < 0.030 < 0.021 < 0.021 < 0.028 Ru-103 < 0.023 <0.016 < 0.018 < 0.021 Ru-106 < 0.202 < 0.088 <0.114 < 0.221 Cs-134 < 0.024 < 0.015 < 0.017 < 0.031 Cs-137 < 0.020 < 0.013 < 0.020 < 0.017 Ce-141 < 0.054 < 0.023 < 0.023 < 0.037 Ce-144 < 0.167 < 0.128 < 0.107 < 0.186 31

KPS Table 14. Grass, analyses for gross beta, strontium-90, and gamma-emitting isotopes (continued).

Collection: Quarterly, April through December Units: pCi/g wet Sample Description and Concentration (pCi/g wet)

Indicator Location K-1b K-1f K-5 K-34 Date Collected 10-04-21 10-04-21 10-04-21 10-04-21 Lab Code KG- 3198 KG- 3199 KG- 3201 KG- 3202 Gross beta 6.69 +/- 0.21 5.32 +/- 0.27 3.85 +/- 0.15 3.72+/-0.15 Sr-90 < 0.004 < 0.005 < 0.001 0.003 +/- 0.001 Be-7 3.76 +/- 0.37 7.53 +/- 0.55 4.78 +/- 0.14 3.02 +/- 0.28 K-40 5.49 +/- 0.62 3.66 +/- 0.52 5.49 +/- 0.18 2.82 +/- 0.31 Mn-54 <0.015 < 0.015 < 0.006 < 0.013 Co-58 < 0.029 < 0.016 < 0.007 < 0.012 Co-60 < 0.014 <0.015 < 0.007 < 0.012 Nb-95 < 0.026 < 0.026 < 0.011 < 0.021 Zr-95 < 0.038 < 0.031 < 0.014 < 0.019 Ru-103 < 0.022 < 0.021 < 0.011 < 0.012 Ru-106 < 0.138 < 0.229 < 0.059 < 0.125 Cs-134 < 0.024 < 0.024 < 0.007 < 0.015 Cs-137 < 0.022 < 0.020 < 0.008 < 0.015 Ce-141 < 0.026 < 0.035 < 0.016 < 0.033 Ce-144 < 0.100 < 0.187 < 0.071 < 0.086 Indicator Control Location K-38 K-39 K-3 K-35 Date Collected 10-04-21 10-04-21 10-04-21 10-04-21 Lab Code KG- 3204 KG- 3205 KG- 3200 KG- 3203 Gross beta 3.37 +/- 0.14 9.99 +/- 0.67 4.08 +/- 0.15 5.74 +/- 0.19 Sr-90 < 0.003 < 0.006 < 0.002 < 0.003 Be-7 4.16 +/- 0.14 4.86 +/- 0.29 3.32 +/- 0.12 3.71 +/- 0.32 K-40 4.03 +/- 0.17 4.44 +/- 0.39 4.65 +/- 0.17 4.77 +/- 0.46 Mn-54 < 0.007 <0.013 < 0.006 < 0.020 Co-58 < 0.006 <0.013 < 0.006 < 0.016 Co-60 < 0.006 <0.012 < 0.006 < 0.016 Nb-95 < 0.009 <0.017 < 0.007 < 0.025 Zr-95 < 0.009 < 0.020 < 0.013 < 0.042 Ru-103 < 0.009 < 0.011 < 0.007 < 0.020 Ru-106 < 0.059 < 0.111 < 0.042 <0.136 Cs-134 < 0.006 < 0.013 < 0.005 < 0.018 Cs-137 < 0.007 < 0.020 < 0.006 < 0.015 Ce-141 < 0.014 < 0.031 <0.012 < 0.030 Ce-144 < 0.053 < 0.121 < 0.048 < 0.087 32

KPS Table 15. Soil samples, analyses for gross alpha, gross beta, strontium-90, and gamma-emitting isotopes.

Collection: Semiannually Sample Description and Concentration (pCi/g dry)

Indicator Location K-1f K-34 K-38 Date Collected 05-03-21 05-03-21 05-03-21 Lab Code KSO- 1325 KSO- 1327 KSO- 1329 Gross alpha 6.01 +/- 1.49 7.06 +/- 1.63 6.68 +/- 2.25 Gross beta 15.63 +/- 1.03 26.00 +/- 1.66 30.85 +/- 1.72 Sr-90 < 0.052 < 0.045 < 0.041 Be-7 < 0.46 < 0.38 < 0.34 K-40 20.15 +/- 0.83 18.77 +/- 1.15 22.72 +/- 1.37 Nb-95 < 0.088 < 0.062 < 0.063 Zr-95 < 0.070 < 0.086 < 0.094 Ru-103 < 0.067 < 0.048 < 0.065 Ru-106 < 0.178 < 0.255 < 0.323 Cs-134 < 0.018 < 0.025 < 0.036 Cs-137 0.05 +/- 0.02 0.10 +/- 0.05 0.14 +/- 0.06 Ce-141 < 0.128 < 0.075 < 0.097 Ce-144 < 0.172 < 0.194 < 0.178 Date Collected 10-04-21 10-04-21 10-04-21 Lab Code KSO- 3192 KSO- 3195 KSO- 3197 Gross alpha 6.87 +/- 1.92 6.87 +/- 1.96 6.60 +/- 1.63 Gross beta 24.32 +/- 1.60 23.39 +/- 1.72 28.12 +/- 1.60 Sr-90 < 0.043 < 0.028 0.029 +/- 0.017 Be-7 < 0.39 < 0.42 < 0.41 K-40 19.12 +/- 0.99 17.93 +/- 0.96 23.10 +/- 1.12 Nb-95 < 0.040 < 0.053 < 0.084 Zr-95 < 0.074 < 0.056 < 0.102 Ru-103 < 0.046 < 0.031 < 0.047 Ru-106 < 0.248 < 0.205 < 0.276 Cs-134 < 0.025 < 0.034 < 0.031 Cs-137 0.10 +/- 0.04 0.12 +/- 0.03 0.10 +/- 0.04 Ce-141 < 0.099 < 0.085 < 0.123 Ce-144 < 0.217 < 0.168 < 0.257 33

KPS Table 15. Soil samples, analyses for gross alpha, gross beta, strontium-90, and gamma-emitting isotopes (continued).

Collection: Semiannually Sample Description and C_oncentration (pCi/g dry)

Control Location K-3 K~35 Date Collected 05-03-21 05-03-21 Lab Code KSO- 1326 KSO- 1328 Gross alpha 8.13 +/- 1.85 7.55 +/- 1.96 Gross beta 30.13+/- 1.77 21.11 +/- 1.68 Sr-90 < 0.056 < 0.045 Be-7 < 0.43 < 0.46 K-40 20.16 +/- 1.30 16.16 +/- 1.19 Nb-95 < 0.045 < 0.046 Zr-95 < 0.109 < 0.075 Ru-103 < 0.050 < 0.049 Ru-106 < 0.325 < 0.377 Cs-134 < 0.029 < 0.026

. Cs-137 0.11 +/- 0.04 0.06 +/- 0.03 Ce-141 < 0.088 < 0.078 Ce-144 < 0.173 < 0.178 Date Colleded 10-04-21 10-04-21 Lab Code KSO- 3193 KSO- 3196 Gross alpha 7.52 +/- 1.91 5.78 +/- 2.20 Gross beta 28.03 +/- 1.73 17.77 +/- 1.53 Sr-90 < 0.046 < 0.028 Be-7 < 0.38 < 0.48 K-40 21.65 +/- 1.04 13.73 +/- 0.95 Nb-95 < 0.037 < 0.076 Zr-95 < 0.041 < 0.095 Ru-103 < 0.031 < 0.035 Ru-106 < 0.288 < 0.178 Cs-134 < 0.030 < 0.035 Cs-137 0.13 +/- 0.05 0.12 +/- 0.043 Ce-141 < 0.073 < 0.103 Ce-144 < 0.127 < 0.150 34

KPS

  • Table 16. Surface water samples, analyses for gross beta, potassium-40 and gamma-emitting isotopes.

Collection: Quarterly Sample Description and Concentration (pCi/L)

Indicator K-1b Date Collected 03-01-21 06-01-21 08-02-21 Lab Code KSW- 480 KSW- 1592 KSW- 2438 Gross beta Suspended Solids < 0.7 < 0.7 < 0.7 Dissolved Solids 5.1 +/- 1.0 1.7 +/- 0.8 2.9 +/- 0.8 Total Residue 5.1 +/- 1.0 1.7 +/- 0.8 2.9 +/- 0.8 K-40 (ICP) 5.00 < 2.30 3.77 Mn-54 <.2.8 < 1.8 < 3.0 Fe-59 < 4.9 < 3.6 < 4.0 Co-58 < 3.2 < 2.7 < 4.2 Co-60 < 2.8 < 1.9 < 3.7 Zn-65 < 3.8 < 4.9 < 2.6 Zr-Nb-95 < 2.8 < 2.6 < 2.9 Cs-134 < 3.7 < 3.3 < 3.4 Cs-137 < 2.8 < 2.8 < 2.5 Ba-La-140 < 2.3 < 4.4 < 4.0 K-1d Date Collected 03-01-21 06-01-21 08-02-21 Lab Code KSW- 481 KSW- 1593 KSW- 2439 Gross beta Suspended Solids < 0.8 < 0.8 < 0.8 Dissolved Solids 1.5 +/- 0.4 1.2 +/- 0.4 1.3 +/- 0.4 Total Residue 1.5 +/- 0.4 1.2 +/- 0.4 1.3 +/- 0.4 K-40 (ICP) 1.80 1.23 1.39 Mn-54* < 4.1 < 3.3 < 3.0 Fe-59 < 4.9 < 7.3 < 8.0 Co-58 < 2.6 < 2.7 < 3.5 Co-60 < 2.1 < 2.7 < 3.0 Zn-65 < 8.0 < 4.3 < 5.6 Zr-Nb-95 < 2.6 < 2.3 < 4.2 Cs-134 < 4.3 < 4.2 < 4.6 Cs-137 < 4.2 < 4.2 < 5.9 Ba-La-140 < 5.2 < 3.3 < 4.7 35

KPS Table 16. -Surface water samples, analyses for gross beta, potassium-40, and gamma-emitting isotopes (continued).

Collection: Quarterly Sample Description and Concentration (pCi/L)

Indicator K-1b Date Collected 11-01-21 Lab Code KSW- 3661 Gross beta Suspended Solids < 0.7 Dissolved Solids 2.5 +/- 0.7 Total Residue 2.5 +/- 0.7 K-40 (ICP) 3.36 Mn-54 < 2.8 Fe-59 < 3.9 Co-58 < 1.7 Co-60 < 1.7 Zn-65 < 4.3 Zr-Nb-95 < 2.1 Cs-134 < 3.7 Cs-137 < 2.4 Ba-La-140 < 3.5 K-1d Date Collected 11-01-21 Lab Code KSW- 3662 Gross beta Suspended Solids < 0.8 Dissolved Solids 1.6 +/- 0.8 Total Residue 1.6 +/- 0.8 K-40 (ICP) 1.39 Mn-54 < 2.0 Fe-59 < 3.9 Co-58 < 2.1 Co-60 < 1.9 Zn-65 < 5.8 Zr-Nb-95 < 2.4 Cs-134 < 3.3 Cs-137 < 3.7 Ba-La-140 < 3.3 36

KPS Table 16. Surface water samples, analyses for gross beta, potassium-40 and gamma-emitting isotopes (continued).

Collection: Quarterly Sample Description and Concentration (pCi/L)

Indicator K-1e Date Collected 03-01-21 06-01-21 08-02-21 Lab Code KSW- 482 KSW- 1594 KSW- 2440 Gross beta Suspended Solids < 0.7 < 0.7 < 0.7 Dissolved Solids 3.3 +/- 0.9 2.1 +/- 0.8 2.8 +/- 0.9 Total Residue 3.3 +/- 0.9 2.1 +/- 0.8 2.8 +/- 0.9 K-40 (ICP) 4.43 2.05. 3.44

. Mn-54 < 2.9 < 1.8 < 1.5 Fe-59 < 2.9 < 4.5 < 4.8 Co-58 < 1.6 < 2.2 < 2.0 Co-60 < 3.1 < 2.4 < 2.0 Zn-65 < 4.5 < 4.1 < 2.9 Zr-Nb-95 < 3.0 < 2.4 < 2.8 Cs-134 < 2.8 < 3.0 < 2.8 Cs-137 < 3.2 < 2.8 < 1.8 Ba-La-140 < 2.7 < 1.8 < 6.5 Date Collected 11-01-21 Lab Code KSW- 3663 Gross beta Suspended Solids < 0.7 Dissolved Solids 0.9 +/- 0.4 Total Residue 0.9 +/- 0.4 K-40 (ICP) 3.12 Mn-54 < 4.8 Fe-59 < 9.0 Co-58 < 5.5 Co-60 < 3.8 Zn-65 < 3.9 Zr-Nb-95 < 5.5 Cs-134 < 4.8 Cs-137 < 4.4 Ba-La-140 < 2.7 37

KPS Table 16. Surface water samples, analyses for gross beta, potassium-40 and gamma-emitting isotopes (continued).

Collection: Quarterly Sample Description and Concentration (pCi/L)

Control K-9 {Raw)

Date Collected 03-01-21 06-01-21 08-02-21 Lab Code KSW- 483 KSW- 1595 KSW- 2441 Gross beta Suspended Solids < 0.8 < 0.8 < 0.8 Dissolved Solids 1.2 +/- 0.4 1.2 +/- 0.4 1.5 +/- 0.4 Total Residue 1.2 +/- 0.4 1.2 +/- 0.4 1.5 +/- 0.4 K-40 (ICP) 1.31 1.15 1.23 Mn-54 < 2.2 < 3.8 < 1.8 Fe-59 < 3.4 < 4.4 < 6.2 Co-58 < 3.3 < 2.8 < 2.3 Co-60 < 3.5 < 2.1 < 2.1 Zn-65 < 7.5 < 3.5 < 1.3 Zr-Nb-95 < 4.7 < 2.8 < 3.2 Cs-134 < 4.2 < 4.3 < 2.6 Cs-137 < 3.2 < 2.3 < 2.9 Ba-La-140 < 4.6 < 2.4 < 5.7 K-9 {Tap)

Date Collected 03-01-21 06-01-21 08-02-21 Lab Code KSW- 484 KSW- 1596 KSW- 2442 Gross beta Suspended Solids < 0.7 < 0.7 < 0.7 Dissolved Solids 1.1 +/- 0.4 0.9 +/- 0.4 1.0 +/- 0.4 Total Residue 1.1 +/- 0.4 0.9 +/- 0.4 1.0 +/- 0.4 K-40 (ICP) 1.31 1.15 1.48 Mn-54 < 1.9 < 1.9 < 2.6 Fe-59 < 5.9 < 6.5 < 5.3 Co-58 < 1.6 < 2.2 < 2.6 Co-60 < 3.9 < 2.1 < 2.5 Zn-65 < 7.8 < 1.8 < 4.4 Zr-Nb-95 < 5.8 < 3.4 < 3.6 Cs-134 < 4.4 < 3.5 < 2.8 Cs-137 < 2.6 < 3.1 < 1.9 Ba-La-140 < 4.6 < 4.2 < 6.5 38

KPS Table 16. Surface water samples, analyses for gross beta, potassium-40, and gamma-emitting isotopes (continued).

Collection: Quarterly Sample Description and Concentration (pCi/L)

Control K-9 {Rawl Date Collected 11-01-21 Lab Code KSW- 3664 Gross beta Suspended Solids < 0.8 Dissolved Solids 1.0 +/- 0.4 Total Residue 1.0 +/- 0.4 K-40 (ICP) 1.23 Mn-54 < 3.0 Fe-59 < 5.6 Co-58 < 2.1 Co-60 < 2.3 Zn-65 < 4.1 Zr-Nb-95 < 3.9 Cs-134 < 2.7 Cs-137 < 2.7 Ba-La-140 < 4.4 K-9 {Tap)

Date Collected 11-01-21 Lab Code KSW- 3665 Gross beta Suspended Solids < 0.7 Dissolved Solids 0.7 +/- 0.4 Total Residue 0.7 +/- 0.4 K-40 (ICP) 1.23 Mn-54 < 3.4 Fe-59 < 4.8 Co-58 < 2.9 Co-60 < 2.1 Zn-65 < 6.2 Zr-Nb-95 < 5.4 Cs-134 < 4.3 Cs-137 < 2.9 Ba-La-140 < 3.5 39

KPS Table 17. Surface water, analyses for tritium and strontium-90.

Location and Concentration pCi/L Collection Period H-3 Sr-90 Indicator K-1b 1st Quarter KSW -480 < 160 < 0.7 2nd Quarter KSW -1592 < 161 < 0.4 3rd Quarter KSW -2438 < 161 < 0.6 4th Quarter KSW -3661 < 163 < 0.5 K-1d 1st Quarter KSW -481 < 160 < 0.6 2nd Quarter KSW -1593 < 161 < 0.4 3rd Quarter KSW -2439 < 161 < 0.5 4th Quarter KSW -3662 < 163 < 0.6 K-1e 1st Quarter KSW -482 < 160 < 0.8 2nd Quarter KSW -1594 < 161 < 0.4 3rd Quarter KSW -2440 < 161 < 0.6 4th Quarter KSW -3663 < 163 < 0.5 Control K-9 1st Quarter KSW -483 (Raw) < 160 < 0.7 KSW -484 (Tap) < 160 < 0.6 2nd Quarter KSW -1595 (Raw) < 161 < 0.5 KSW -1596 (Tap) < 161 < 0.4 3rd Quarter KSW -2441 (Raw) < 161 < 0.5 KSW -2442 (Tap) < 161 < 0.5 4th Quarter KSW -3664 (Raw) < 163 < 0.5 KSW -3665 (Tap) < 163 < 0.5 40

KPS Table 18. Fish, collected at K-1 d, analyses for gross beta, strontium-90 and gamma-emitting isotopes.

Collection: Annually Sample Description and Concentration (pCi/g wet)

Collected 08-25-21 Lab Code KF- 3186 Type Chinook Salmon Portion Bones Gross beta 5:29 +/- 0.29 4.52 +/- 0.78 Sr-90 NAa < 0.07 K-40 3.71 +/- 0.46 NAa Mn-54 < 0.020 NA" Fe-59 < 0.046 NAa Co-58 < 0.022 NAa Co-60 < 0.018 NA" Cs-134 < 0.017 NA" Cs-137 < 0.018 NA"

  • NA= Not analyzed; analyses not required.

41

KPS Table 19. Shoreline sediment samples, analyses for gross beta and strontium-90, and gamma-emitting isotopes.

Collection: May and November Sample Description and Concentration (pCi/g dry)

Indicator Control Location K-1c K-1j K-9 Collection Date 05-03-21 05-03-21 05-03-21 Lab Code KSS- 1322 KSS- 1323 KSS- 1324 Gross beta 8.11 +/- 0.89 8.20 +/- 0.93 9.50 +/- 0.90 Sr-90 < 0.039 < 0.037 < 0.042 K-40 3.91 +/- 0.49 5.31 +/- 0.51 7.70 +/- 0.64 Co-58 < 0.023 < 0.014 < 0.023 Co-60 < 0.016 < 0.017 < 0.017 Cs-134 < 0.019 < 0.021 < 0.017 Cs-137 < 0.030 < 0.019 < 0.020 Location Collection Date 11-01-21 11-01-21 11-01-21 Lab Code KSS- 3666 KSS- 3668 KSS- 3669 Gross beta 9.12 +/- 0.92 12.12 +/- 0.98 13.59 +/- 1.05 Sr-90 < 0.067 < 0.062 < 0.052 K-40 6.28 +/- 0.44 8.44 +/- 0.55 9.78 +/- 0.55 Co-58 < 0.012 < 0.017 < 0.019 Co-60 < 0.011 < 0.009 < 0.011 Cs-134 < 0.014 < 0.014 < 0.013 Cs-137 < 0.017 < 0.019 < 0.015 42

This page intentionally left blank a Dominion

~ Energy 2021 Annual Radiological EnvironIDental Operating Report Kewaunee Power Station Part Ill Corrective Actions written during reporting period Dominion Energy *Kewaunee, Inc.

This page intentionally left blank CA842 (Peroutka/Shannon) to evaluate the changes at sampling locations K-5 and K-39 and initiate actions needed to revise the REMM in accordance with RP-KW-280 CA843 (Peroutka/Shannon) to include the revision of the REMM in the Annual Effluent Release Report Work Order#

Comments Status Pending Attachments 2020-Kewaunee-Land-Use-Census.pdf Content Type: Item Version: 6.0 Close Created at 3/25/2021 2:01 PM by[] Dan J Shannon (Dom Nuclear Projects, Inc - 4)

Last modified at 6/16/2021 7:16 AM by[] Timothy P Olson (Dom Nuclear Projects, Inc - 4)

locations were collected and analyzed in 2020.

ATI-Environmental, the vendor who is also contracted to perform sampling and analysis for the REMM, stated that the quarterly Grass sampling and TLD monitoring could still be performed, but that there is no Cattle feed available for sampling at these locations.

Initial Actions Initiated CR to evaluate the changes to sampling locations K-5 and K-39 and revise the REMM per RP-KW-280 Recom Actions: Assign action to RP (Peroutka/Shannon) to evaluate the changes at sampling locations K-5 and K-39 and initiate actions needed to revise the REMM in accordance with RP-KW-280 (5/27/21)

Assign action to RP (Peroutka/Shannon) to includ the revision of the REMM in the Annual Effluent Release Report (5/12/22) additional Contacts Tag#:

Equipment Location Equipment Description Plant System OP-AA-102 Review Reqd? No Operability Assesment N/A Operability Comments Functionality Assessment N/A Reportable Condition No Reportability Comments Is Equipment Important to Emergency Response WM-KW-100 values No O/R Comments Significance (screening) 3 Potential Repeat (screening) No Previous Issue No history identifed CRT Comments

Print CR_ID 2182 Short description REMM Revision Required Due to Changes Identified by 2020 Annual Land Use Census Site Kewaunee Discovery Date/Time 3/25/2021 12:00 PM Submitter [1 Dan J Shannon (Dom Nuclear Projects, Inc - 4)

Submitters Dept 2. Radiation Protection Supervisor CJ Bradly J McMahon (Dom Nuclear Projects, Inc - 4)

Unit 1 Mode Unit ISFSI? No Revision#

Long Description The 2020 annual Land Use Census performed by the contracted vendor ATI-Environmental, as required by the Radiological Environmental Monitoring Manual and RP-KW-001-014, identified changes at two indicator sampling locations, K-5 and K-39:

K Paplham Farm located 3.2 miles from KPS in sector NNW. Samples required at this indicator location include Grass and TLD (quarterly), and Cattle feed (annually) per REMM Table 2.2.1-B.

As of November 2020, this farm has been foreclosed and all farming operations have ceased.

K-39, Wotja Farm located 3.46 miles from KPS in sector N. Samples required at this indicator location include Grass and TLD (quarterly), and Cattle feed (annually) per REMM Table 2.2.1-B.

All the cows at this location have been sold and the owner is no longer in the milk production business.

All required REMM samples at these two

Print CR_ID 2217 Short description K-8 Environmental air sampler found off due to an open breaker. Most likely the breaker opened due to recent lighting storms.

Kewaunee Discovery Date/Time 8/10/2021 11 :20 AM i-1 Mark A Peroutka (Dom Nuclear Projects, Inc - 4).

2. Radiation Protection

[} Dan J Shannon (Dom Nuclear Projects, Inc - 4)

No 0

K-8 Environmental air sampler found off due to an open breaker. Most likely the breaker opened due to recent lighting storms earlier this week. Breaker located on the pole was reset/closed and sampler started running. The airs ampler had operated for 117.49 hours5.671296e-4 days <br />0.0136 hours <br />8.101852e-5 weeks <br />1.86445e-5 months <br />. The air sample filter was changed out and sent to vendor for analysis with reduce volume.

In tial Actions Reset Breaker on pole. Verified Sampler was working properly. Collected reduced volume sample and sent to vendor.

com Actions: None Taf #:

Eq~ipment Location Eq\ipment. Descriotion Plant System OP AA-102 Review Reqd? No

. Operability Assesment N/A Operability Comments None Fur1ctionality Assessment N/A Reportable Condition No

Reportability Comments Is Equipment Important to Emergency Response WM-KW-100 values O/R Comments None Significance (screening) 3 Potential Repeat (screening) Yes Previous Issue CR784 K-8 REMP ENVIRONMENTAL AIR SAMPLERS FOUND NOT RUNNING CR1285 K-8 ENVIROMENTAL AIR SAMPLER FOUND NOT RUNNING CR1940 Environmental air sample pump found off at location K-8 CR1974 K-8 Location environmental air sample pump found not running due to breaker being open CR2025 K-8 Environmental air sampler found off with blown fuse CRT Comments CA847 (Peroutka/Shannon) to include this CR in th 2021 Annual Radiological Environmental Operatic Report.

Work Order#

Comments Status Pending Content Type: Item Version: 5.0 Close Created at 8/10/2021 4:17 PM by[] Mark A Peroutka (Dom Nuclear Projects, Inc - 4)

Last modified at 8/12/2021 1:00 PM byU Timothy P Olson (Dom Nuclear Projects, Inc - 4)