RA24-011, 2023 Annual Radiological Environmental Operating Report
| ML24124A045 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/03/2024 |
| From: | Van Fleet J Constellation Energy Generation |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| RA24-011 | |
| Download: ML24124A045 (1) | |
Text
Constellation.
LaSalle County Station 2601 North 21 11 Road Marseilles. IL 61341 815-415-2000 Telephone RA24-011 May 3, 2024 10 CFR 50 Appendix I U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001
Subject:
LaSalle County Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374 2023 Annual Radiological Environmental Operating Report Enclosed is the Constellation Energy Generation, LLC, 2023 Annual Radiological Environmental Operating Report for LaSalle County Station, submitted in accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report." The enclosed report contains the results of groundwater monitoring conducted in accordance with Constellation's Radiological Groundwater Protection Program, which is a voluntary program implemented in 2006. This information is being reported in accordance with a nuclear industry initiative.
There are no regulatory commitments contained within this letter. Should you have any questions concerning this letter, please contact Ms. Laura Ekern, Regulatory Assurance Manager, at (815) 415-2800.
Respectfully, Jott~~
Site Vice President LaSalle County Station
Enclosures:
LaSalle County Station Units 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2023 cc:
Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - LaSalle County Station
Docket No:
50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2023 Prepared By Teledyne Brown Engineering Environmental Services
--....,* Constellation~
LaSalle County Station Marseilles, IL 61341 May 2024
Table Of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 3 A. Objectives of the REMP....................................................................................... 3 B. Implementation of the Objectives........................................................................ 3 Ill. Program Description....................................................................................................... 4 A. Sample Collection................................................................................................ 4 B. Sample Analysis.................................................................................................. 6 C. Data Interpretation............................................................................................... 6 D. Program Exceptions............................................................................................ 7 E. Program Changes............................................................................................... 8 IV. Results and Discussion................................................................................................. 9 A. Aquatic Environment........................................................................................... 9
- 1. Surface Water........................................................................................... 9
- 2. Ground/Well Water................................................................................... 9
- 3. Fish........................................................................................................... 9
- 4. Sediment................................................................................................. 10 B. Atmospheric Environment................................................................................. 10
- 1. Airborne.................................................................................................. 10
- a. Air Particulates............................................................................. 10
- b. Airborne Iodine............................................................................. 11
- 2. Terrestrial................................................................................................ 11
- a. Food Products.............................................................................. 11
- b. Vegetation.................................................................................... 11 C. Ambient Gamma Radiation............................................................................... 12 D. Land Use Census.............................................................................................. 12 E. Errata Data........................................................................................................ 13 F. Summary of Results - Inter-laboratory Comparison Program............................ 13
Appendix A Tables Table A-1 Appendix B Tables Table B-1 Table B-2 Figures Figure B-1 Figure B-2 Figure B-3 Appendix C Tables Table C-1.1 Table C-1.2 Table C-1.3 Table C-11.1 Table C-I1.2 Appendices Radiological Environmental Monitoring Report Annual Summary Radiological Environmental Monitoring Program Annual Summary for the LaSalle County Station, 2023 Location Designation, Distance & Direction, and Sample Collection &
Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2023 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2023 Inner Ring OSLD Locations of the LaSalle County Station, 2023 Outer Ring OSLD Locations and Fixed Air Sampling Locations of the LaSalle County Station, 2023 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2023 Data Tables and Figures - Primary Laboratory Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Tritium in Ground/Well Water Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Gamma Emitters in Ground/Well Water Samples Collected in the Vicinity of LaSalle County Station, 2023 ii
Table C-111.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-Vl.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-Vll.1 Concentrations of Gamma Emitters in Food Product Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-Vll.2 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of LaSalle County Station, 2023 Table C-Vlll.1 Quarterly DLR Results for LaSalle County Station, 2023 Figures Figure C-1 Figure C-2 Figure C-3 Figure C-4 Figure C-5 Figure C-6 Figure C-7 Figure C-8 Appendix D Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Station L-10 (C) Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Stations L-08 and L-11 Collected in the Vicinity of LSCS, 2005 - 2023 Air Particulate - Gross Beta - Station L-11A Collected in the Vicinity of LSCS, 2016 - 2023 Inter-Laboratory Comparison Program iii
Tables Table D-1 Table D-2 Table D-3 Appendix E Appendix F Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2023 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)
Teledyne Brown Engineering Environmental Services, 2023 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services, 2023 Errata Data Annual Radiological Groundwater Protection Program Report (ARGPPR) iv
I.
Summary and Conclusions In 2023, the LaSalle Generating Station released to the environment through the radioactive effluent gaseous pathways approximately 557 curies of noble gas, fission, and activation products and approximately 58.6 curies of tritium. There were no liquid effluent releases at the site in 2023. The solid and gaseous radioactive effluents from LAS were well below 40 CFR 190 regulatory limits and are summarized below:
Calculated Dose to Members of the Public Whole Body Thyroid Max Other Organ Gaseous 1*2 1.27E-02 5.70E-02 4.71E-02 Liquid 0.00E+00 0.00E+00 0.00E+00 Sky Shine 1.95E-01 Total Site Dose 2.08E-01 5.70E-02 4.71E-02 Total with Other 2.0SE-01 5.70E-02 4.71 E-02 Nearby Facility 3 Limit 25 mrem 75 mrem 25 mrem
% of Limit 8.31E-01 7.S0E-01 1.88E-01 1 Gaseous dose values include organ dose from Noble Gas, Iodine, Tritium, Carbon-14 and particulates with half-lives > 8 days 2 Individual groups with the highest dose are used:
Total Body: all age groups for Noble Gas; the Infant & Child for particulates Individual age group sum is lower 3 Other fuel cycle sources within 5 miles of the site do not exist This report on the Radiological Environmental Monitoring Program conducted for the LaSalle County Station (LSCS) by Constellation covers the period 1 January 2023 through 31 December 2023. During that time period, 1,325 analyses were performed on 1,245 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of LSCS had no adverse radiological impact on the environment.
Surface water samples were analyzed for concentrations of gross beta, tritium and gamma-emitting nuclides. Ground/well water samples were analyzed for concentrations of tritium and gamma-emitting nuclides. No fission or activation products were detected. Gross beta and tritium activities detected were consistent with those detected in previous years.
Commercially and recreationally important fish species were sampled and analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected in fish.
1
Sediment samples were analyzed for concentrations of gamma-emitting nuclides.
No fission or activation products were detected.
Air particulate samples were analyzed for concentrations of gross beta and gamma-emitting nuclides. No fission or activation products were detected.
High sensitivity iodine-131 (1-131) analyses were performed on weekly air samples.
All results were less than the minimum detectable activity for 1-131.
Food product samples were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected.
Vegetation samples were analyzed for concentrations of gamma-emitting nuclides.
No fission or activation products were detected.
Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescence Dosimeters (OSLO) for the Radiological Environmental Monitoring Program (REMP). The results from the environmental gamma radiation monitoring program were consistent with those detected in previous years.
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II.
Introduction The LaSalle County Station (LSCS), consists of two boiling water reactors, each rated for 3,546 MWt. Both units are owned and operated by Constellation Energy and are located in LaSalle County, Illinois. Unit 1 went critical on 16 March 1982.
Unit 2 went critical on 02 December 1983. The site is located in northern Illinois, approximately 75 miles southwest of Chicago, Illinois.
A Radiological Environmental Monitoring Program (REMP) for LSCS was initiated in 1982 (the preoperational period for most media covers the periods 1 January 1979 through 26 December 1981 and was summarized in a separate report.). This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer on samples collected during the period 1 January 2023 through 31 December 2023.
A Objectives of the REMP The objectives of the REMP are to:
- 1.
Provide data on measurable levels of radiation and radioactive materials in the site environs.
- 2.
Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.
B.
Implementation of the Objectives The implementation of the objectives is accomplished by:
- 1.
Identifying significant exposure pathways.
- 2.
Establishing baseline radiological data of media within those pathways.
- 3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment.
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Ill.
Program Description A.
Sample Collection Samples for the LSCS REMP were collected for Constellation by Microbac Laboratories Inc. This section describes the general collection methods used by Microbac Laboratories Inc. to obtain environmental samples for the LSCS REMP in 2023. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-3, Appendix B.
Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground/well water, fish and sediment. Two gallon water samples were collected weekly from two surface water locations (L-21 and L-40) and composited for monthly and quarterly required analyses.
Control location was L-21. Two ground/well water locations (L-27 and L-28) were also grab-sampled quarterly. Wells 4, 5 and 6 are associated with L-28.
L-27 and L-28 Well 6 could be affected by LaSalle's effluent releases. All samples were collected via grab sample. The samples were then transferred to new unused plastic containers. Both the grab container and the sample containers were rinsed with source water prior to actual sample collection.
Fish samples were collected semiannually at three locations, L-34, L-35 and L-36 (Control). Sediment samples composed of recently deposited substrate were collected at three locations semiannually, L-21 (Control), L-40 and L-41.
Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of airborne particulate and iodine. Airborne particulate and iodine samples were collected and analyzed weekly at nine locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-10, and L-11A). The control location was L-10. Airborne particulate and iodine samples were obtained at each location, using a vacuum pump to pull air through an iodine cartridge and a glass fiber particulate filter. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The particulate filters and iodine cartridges were replaced weekly and sent to the laboratory for analysis.
Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on samples of food products. Samples were collected during the growing season at four locations: L-42 (control), L-Quad 1, L-Quad 2, L-Quad 3 and L-Quad 4. Various types of samples were collected, placed in new unused plastic bags and sent to the laboratory for analysis.
Vegetation samples were collected monthly during the growing season from May through October at three locations: L-Veg C (control), L-ESE1, and 4
L-ESE2. Location L-Veg C is in the lowest deposition sector (ENE sector) surrounding LaSalle. The highest deposition sector surrounding LaSalle is ESE sector. These samples were collected, placed in new unused plastic bags and sent to the laboratory for analysis.
Ambient Gamma Radiation Beginning in the first quarter of 2012, the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP) was changed.
Optically Stimulated Luminescent Dosimetry (OSLO) were deployed and Thermo-luminescent Dosimetry (TLD) were discontinued. This change may cause step changes in readings, up or down, depending on site characteristics. However, the relative comparison to control locations remains valid. OSLO technology is different than that used in a TLD but has the same purpose (to measure direct radiation).
Each location consisted of 2 OSLO sets placed approximately six feet above ground level. The OSLDs were exchanged quarterly and sent to Landauer for analysis.
The OSLO locations were placed on and around the LSCS site as follows:
An inner ring consisting of 16 locations (L-101, L-102, L-103, L-104, L-105, L-106, L-107, L-108, L-109, L-110, L-111B, L-112, L-113A, L-114, L-115 and L-116) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses from LSCS releases).
An outer ring consisting of 17 locations (L-201, L-202, L-203, L-204, L-205A, L-205B, L-206, L-207, L-208, L-209, L-210, L-211, L-212, L-213, L-214, L-215 and L-216) extending to approximately 5 miles from the site designed to measure possible exposures to nearby population.
An other set consisting of eight locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, and L-11A).
The balance of one location (L-10) representing the control area.
The specific OSLO locations were determined by the following criteria:
- 1. The presence of relatively dense population;
- 2. Site meteorological data taking into account distance and elevation for each of the sixteen 22 1/2 degree sectors around the site, where estimated annual dose from LSCS, if any, would be most significant;
- 3.
On hills free from local obstructions and within sight of the vents (where practical);
- 4.
And near the closest dwelling to the vents in the prevailing downwind direction.
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B.
Sample Analysis This section describes the general analytical methodologies used by Microbac Laboratories Inc. and TBE to collect and analyze, respectively, the environmental samples for radioactivity for the LSCS REMP in 2023. The analytical procedures used by the laboratory are listed in Table B-2.
In order to achieve the stated objectives, the current program includes the following analyses:
- 1.
Concentrations of beta emitters in surface water and air particulates
- 2.
Concentrations of gamma emitters in ground/well and surface water, air particulates, fish, sediment and vegetation
- 3. Concentrations of tritium in ground/well and surface water
- 4. Ambient gamma radiation levels at various site environs C.
Data Interpretation The radiological and direct radiation data collected prior to LaSalle County Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, LaSalle County Station was considered operational at initial criticality. In addition, data were compared to previous years' operational data for consistency and trending. Several factors were important in the interpretation of the data:
- 1.
Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5%
probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as a before the fact (a priori) estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact (a posteriori) criteria for the presence of activity.
All analyses were designed to achieve the required LSCS detection capabilities for environmental sample analysis.
The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an after the fact estimate of the presence of activity.
- 2.
Net Activity Calculation and Reporting of Results Net activity for a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity effecting a negative number. An MDC was reported in all cases where positive activity was not detected.
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Gamma spectroscopy results for each type of sample were grouped as follows:
For surface water, food products and vegetation: 12 nuclides including Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, 1-131, Cs-134, Cs-137, Ba-140, and La-140were reported.
For ground/well water, fish, sediment and air particulates:
11 nuclides including Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, Cs-134, Cs-137, Ba-140, and La-140 were reported.
Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.
D.
Program Exceptions For 2023, the LSCS REMP had a sample recovery rate of >99%. Sample anomalies and missed samples are listed in the following tables:
Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date WN L-28-5 01/11/23 Well #5 that was due for sampling was out of service. Well #4 sampled.
Timer failure at the station. The filter appears to AP/Al L-08 03/01/23 be similar color to the other ones. Run time calculated & timer exchanged.
The timer indicated approximately 3.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> less than expected, possibly due to a short power AP/Al L-10 03/01/23 outage. NOTE: During the next collection period (3/9), the timer indicated an expected reading of 191.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> for an 8-day collection period.
AP/Al L-06 04/20/23 Pump found not running due to a burned fuse.
Fuse replaced & pump restarted.
The timer indicated approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> less than expected, possibly due to a short power AP/Al L-03 08/02/23 outage. NOTE: During the next collection period (8/10), the timer indicated an expected reading of 188.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> for an 8-day collection period.
The timer indicated approximately 1 O hours less than expected, possibly due to a short power AP/Al L-03 11/16/23 outage. NOTE: During the next collection period (11/22), the timer indicated an expected reading of 143.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> for the collection period.
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Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date(s)
AP/Al L-03 01/19/23 The sampler could not be reached due to road work.
Sample was collected after two-weeks' run.
SW L-21 02/01/23 No sample collected - river frozen L-40 AP/Al L-07 03/16/23 Pump broke down after 91.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />; pump exchanged.
Each program exception has been reviewed to understand the causes of the program exception. Occasional equipment breakdowns and power outages were unavoidable.
The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.
E.
Program Changes There were no program changes in 2023.
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IV.
Results and Discussion A.
Aquatic Environment
- 1.
Surface Water Samples were taken weekly and composited monthly at two locations (L-21 and L-40). Of these locations only L-40 located downstream, could be affected by LaSalle's effluent releases. The following analyses were performed:
Gross Beta Samples from all locations were analyzed for concentrations of gross beta. (Table C-1.1, Appendix C) Gross beta was detected in 24 out of 24 samples with a range of 4.3 to 9.8 pCi/L. (Figure C-1, Appendix C)
The required LLD was met for all samples.
Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-I.2, Appendix C). Tritium was detected in 5 of 8 samples with a range of 190 - 364 pCi/L. Concentrations detected were consistent with those detected in previous years.
(Figure C-2, Appendix C).
Gamma Spectrometry Samples from both locations were analyzed for gamma-emitting nuclides (Table C-1.3, Appendix C). No nuclides were detected, and all required LLDs were met.
- 2.
Ground/Well Water Quarterly grab samples were collected at two locations (L-27 and L-28).
Wells 4, 5 and 6 are associated with L-28. L-27 and L-28 Well 6 could be affected by LaSalle's effluent releases. The following analyses were performed:
Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-I1.1, Appendix C). No tritium was detected and the contractually-required 200 pCi/L LLDs were met.
Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-11.2, Appendix C). No nuclides were detected, and all required LLDs were met.
- 3.
Fish Fish samples were collected at three locations (L-34, L-35 and L-36) semiannually. Locations L-34 and L-35 could be affected by LaSalle's 9
effluent releases. The following analysis was performed:
Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma-emitting nuclides (Table C-111.1, Appendix C). Naturally occurring K-40 was found at all stations and ranged from 2,045 to 3,450 pCi/kg wet. No fission or activation products were found.
- 4.
Sediment Aquatic sediment samples were collected at three locations (L-21, L-40 and L-41) semiannually. Location L-21 is located upstream and is not affected by LaSalle's liquid effluent releases. Locations L-40 and L-41, located downstream, could be affected by LaSalle's effluent releases.
The following analysis was performed:
Gamma Spectrometry Sediment samples from the three locations were analyzed for gamma-emitting nuclides (Table C-IV.1, Appendix C). Naturally occurring Be-7 was found at one station with a concentration of 1,677 pCi/kg dry.
Naturally occurring K-40 was found at all stations and ranged from 9,026 to 20,460 pCi/kg dry. No fission or activation products were found.
B.
Atmospheric Environment
- 1. Airborne
- a.
Air Particulates Continuous air particulate samples were collected from nine locations on a weekly basis. The nine locations were separated into four groups: Group I (onsite) represents locations within the LSCS site boundary (L-03 and L-05), Group II (near-site) represents the locations near the LSCS site (L-01 and L-06), Group Ill (far-field) represents the locations at an intermediate distance from LSCS (L-04, L-07, L-08, and L-11A) and Group IV (control) represents the control location at a remote distance (L-10). The following analyses were performed:
Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-V.1 and C-V.2, Appendix C). Detectable gross beta activity was observed at all locations. Comparison of results among the four groups aid in determining the effects, if any, resulting from the operation of LSCS. The results from the onsite locations (Group I) ranged from 5 to 35E-3 pCi/m3 with a mean of 19E-3 pCi/m3. The results from the near-site location (Group II) ranged from 8 to 35E-3 pCi/m3 with a mean of 20E-3 pCi/m3. The results from the far-field locations (Group Ill) ranged from 6 to 36E-3 10
pCi/m3 with a mean of 20E-3 pCi/m3. The results from the control location (Group IV) ranged from 10 to 37E-3 pCi/m3 with a mean of 21 E-3 pCi/m3. Comparison of the 2023 air particulate data with previous years' data indicate no effects from the operation of LSCS (Figures C-3 through C-8, Appendix C). In addition, comparisons of the weekly mean values for 2023 indicate no notable differences among the four groups.
Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma-emitting nuclides (Table C-V.3, Appendix C). Naturally occurring Be-7, due to cosmic ray activity, was detected in 36 of 36 samples. These values ranged from 57 to 191 E-3 pCi/m3. All other nuclides were less than the MDC.
- b.
Airborne Iodine Continuous air samples were collected from ten locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-10, and L-11A) and analyzed weekly for 1-131 (Table C-Vl.1, Appendix C). No 1-131 was detected.
- 2.
Terrestrial
- a.
Food Products Food product samples were collected at five locations (L42, L-Quad 1, L-Quad 2, L-Quad 3 and L-Quad 4) when available. All locations could be affected by LaSalle's effluent releases. The following analysis was performed:
Gamma Spectrometry Samples from all available locations were analyzed for gamma-emitting nuclides (Table C-Vlll.1, Appendix C). No nuclides were detected, and all required LLDs were met.
- b.
Vegetation Vegetation samples were collected monthly during the growing season from May through October at three locations (L-Veg C, L-ESE-1, and L-ESE-2). The control location was L-Veg C and was located in the lowest deposition sector (ENE sector) surrounding LaSalle. Various vegetation samples were also collected in the highest deposition sector (ESE sector) surrounding LaSalle. The following analyses were performed:
Gamma Spectrometry Samples from all available locations were analyzed for gamma-emitting nuclides (Table C-Vlll.2, Appendix C). No nuclides were detected, and all required LLDs were met.
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C.
Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Optically Stimulated Luminescence Dosimeters (OSLO). Forty-two OSLO locations were established around the site. Results of OSLO measurements are listed in Tables C-IX.1, Appendix C.
All OSLO measurements were below 22 mrem/std. quarter, with a range of 12.5 to 22.0 mrem/quarter. A comparison of the Normalized Annual Dose to the Baseline Background and Minimum Differential Dose indicates that there is no evidence of dose which could be attributed to facility-related direct radiation.
D.
Land Use Census A Land Use Census conducted August 8, 2023, around the LaSalle County Station (LSCS) was performed by Microbac Laboratories Inc. for Constellation Energy to comply with Radiological Effluent Control 12.5.2 of the LaSalle's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident and milk producing animal in each of the sixteen 22 1/2 degree sectors around the site within 10 km (6.2 miles).
The distance and direction of all locations from the LSCS reactor buildings were positioned using Global Positioning System (GPS) technology. Since there were no milk animals within 10 km of LSCS, beef cows were identified.
There were no changes required to the LSCS REMP as a result of this survey. The results of this survey are summarized below:
Distance in Miles from the LSCS Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles A
N 3.9 4.0 B
NNE 1.6 1.7 C
NE 2.1 3.5 D
ENE 3.3 3.8 E
E 3.2 14.2 F
ESE 1.4 G
SE 1.7 5.1 H
SSE 1.8 4.7 J
s 1.5 1.5 K
SSW 0.7 L
SW 1.0 5.8 M
WSW 1.5 N
w 1.7 3.0 p
WNW 0.9 3.0 Q
NW 1.7 3.3 R
NNW 1.7 4.5 12
E.
Errata Data There was no errata data for 2023.
F.
Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices that represent test & matrix combinations available for REMP programs. The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:
- 1.
Analytics Evaluation Criteria Analytics' evaluation report provides a ratio of TB E's result and Analytics' known value. Since flag values are not assigned by Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.
- 2.
ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.
- 3.
DOE Evaluation Criteria MAPEP's evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:
Acceptable (flag = "A") - result within +/- 20% of the reference value Acceptable with Warning (flag = "W') - result falls in the +/- 20% to +/-
30% of the reference value Not Acceptable (flag = "N") - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not always resemble typical environmental samples obtained at commercial nuclear power facilities.
13
For the TBE laboratory, laboratory, 124 out of 131 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria and were addressed through the TBE Corrective Action Program. A summary is found below:
- 1. The MAPEP February 2023 Soil Ni-63 result was evaluated as Not Acceptable. TBE's reported values was 294 Bq/kg and the known result was 1130 Bq/kg (range 791 - 1469). The sample was reprepped by a different (senior) lab technician with results of 1120 & 1250 Bq. It was determined that there was a difference between the two techs during the sample prep (technique) and the procedure was revised to reflect these differences including using a specific aliquot amount. (NCR 23-08)
- 2. The MAPEP February 2023 vegetation Sr-90 result was evaluated as Not Acceptable. The reported value was 0.05 Bq (not detected) and the known result was a "false positive". This was considered to be a statistical failure because TBE's reported result with 3 times the uncertainty resulted in a slightly positive net result (0.03194 Bq/kg). The reported result was significantly below TBE's average detection limit for vegetation samples.
(NCR 23-09)
- 3. The ERA RAD April 2023 water Ba-133 result was evaluated as Not Acceptable. The reported value was 26.0 pCi/L and the known was 22.3 (acceptance range 17.1 - 25.8 pCi) or 117% of the known (acceptable for TBE QC). The sample was used as the workgroup duplicate with a result of 25.4 (114%). The sample had also been counted on a different detector with a result of 21.9 (98%). This was TBE's first failure for Ba-133. (NCR 23-10)
- 4. The MAPEP August 2023 soil Fe-55 result was evaluated as Not Acceptable. The reported value was 346 Bq/kg and the known result was 1280 (acceptance range of 896-1664 Bq/kg). This was TBE's initial evaluation for Fe-55 in soils. The result was received at the end of December and the root cause is under investigation. No client samples were associated with this cross-check. (CAR 23-31)
- 5. The Analytics September 2023 milk Sr-90 result was evaluated as Not Acceptable. The reported result was 7.28 pCi/L and the known result was 12.8 (57% of known). This sample was used as the workgroup duplicate and the carrier yields for both samples were 107% and 75%. The LCS recovery for the workgroup was at 106%. The ERA drinking water Sr-90 cross check that was analyzed around the same time was acceptable at 108%. There was no explanation for the failure. This is the first low biased failure for Sr-90 milk. The last failure (high) was in 2016.
(NCR 23-24) 14
- 6. The ERA RAD October 2023 water Gross Alpha result was evaluated as Not Acceptable. The reported result was 53.2 pCi/L and the known result was 70.6 (acceptable range of 54.0 - 87.2 pCi/L). The reported result was the workgroup duplicate and was within 75% of the known value (within TBE QC range). The original result was 63.3 pCi/L (90% of the known). Because the LCS result was biased slightly high, the decision was made to report the lower value. (NCR 23-20)
- 7. The ERA RAD October 2023 water 1-131 result was evaluated as Not Acceptable. The reported value was 23.5 pCi/L and the known result was 29.7 (acceptable range of 25.8 - 33.6) The reported result was 79% of the known, which is within the acceptable TBE QC range. The workgroup was reviewed with no anomalies found. The LCS/LCSD results were 109% and 86.1 %. The sample was not processed in a timely manner as per the ERA instructions which stated to analyze shortly after receipt due to the short half-life. Going forward, the QA &/or Lab Mgr. will ensure that this analysis is started sooner. (NCR 23-21)
The Inter-Laboratory Comparison Program provides evidence of "in control" counting systems and methods, and that the laboratories are producing accurate and reliable data.
15
APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT ANNUAL
SUMMARY
TABLE A-1 RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM ANNUAL
SUMMARY
FOR THE LASALLE COUNTY STATION, 2023 NAME OF FACILITY:
LASALLE COUNTY STATION DOCKET NUMBER:
50-373 & 50-374 LOCATION OF FACILITY:
MARSEILLES, IL REPORTING PERIOD:
2023 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)
MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN(M)
MEAN(M)
MEAN (M)
STATION#
NONROUTINE (UNITOF ANALYSES ANALYSES OF DETECTION (F)
(F)
(F)
NAME REPORTED MEASUREMEN~
PERFORMED PERFORMED ILLD!
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS FISH GAMMA 12 (PCVKG WET)
K-40 NA 2851 3047 3047 L-36 CONTROL 0
(8/8)
(4/4)
(4/4)
ILLINOIS RIVER - UPSTREAM 2045 -3450 2797 -3438 2797
- 3438 4.3 MILES NE OF SITE MN-54 130
<LLD
<LLD 0
CO-58 130
<LLD
<LLD 0
FE-59 260
<LLD
<LLD 0
CO-60 130
<LLD
<LLD 0
ZN-65 260
<LLD
<LLD 0
NB-95 NA
<LLD
<LLD 0
ZR-95 NA
<LLD
<LLD 0
CS-134 130
<LLD
<LLD 0
I CS-137 150
<LLD
<LLD 0
N BA-140 NA
<LLD
<LLD 0
LA-140 NA
<LLD
<LLD 0
SEDIMENT GAMMA 6
(PCVKGDRY)
K-40 NA 15372 17825 17825 L-21 CONTROL 0
(4/4)
(2/2)
(2/2)
ILLINOIS RIVER - UPSTREAM 9026-20460 17310 - 18340 17310-18340 4.0 MILES NE OF SITE MN-54 NA
<LLD
<LLD 0
CO-58 NA
<LLD
<LLD 0
FE-59 NA
<LLD
<LLD 0
C0-60 NA
<LLD
<LLD 0
ZN-65 NA
<LLD
<LLD 0
NB-95 NA
<LLD
<LLD 0
ZR-95 NA
<LLD
<LLD 0
CS-134 150
<LLD
<LLD 0
CS-137 180
<LLD
<LLD 0
BA-140 NA
<LLD
<LLD 0
LA-140 NA
<LLD
<LLD 0
AIR PARTICULATE GR*B 475 10 19.8 20.8 20.8 L-10 CONTROL 0
(E-3 PC/ICU.METER)
(422/422)
(53/53)
(53/53)
STREATOR 5-36 10 -37 10-37 13.5 MILES SW OF SITE (M) The Mean Values are calculated using the positive values (values~ MDC). (F) Fradion of detectable measurement are indicated in parentheses.
TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL
SUMMARY
FOR THE LASALLE COUNTY STATION, 2023 NAME OF FACILITY:
LASALLE COUNTY STATION DOCKET NUMBER:
50-373 & 50-374 LOCATION OF FACILITY:
MARSEILLES, IL REPORTING PERIOD:
2023 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)
MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN(M)
MEAN(M)
MEAN(M)
STATION#
NONROUTINE (UNITOF ANALYSES ANALYSES OF DETECTION (F)
(F)
(F)
NAME REPORTED MEASUREMEN!J.
PERFORMED PERFORMED (LLD!
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR PARTICULATE GAMMA 36 (E-3 PC/ICU.METER)
Be-7 NA 109 111 113 L-11A INDICATOR 0
(32/32)
(4/4)
(4/4)
RANSOM 57 - 191 67 - 152 69-145 6.0 MILES S OF SITE CO-58 NA
<LLD
<LLD 0
FE-59 NA
<LLD
<LLD 0
CO-60 NA
<LLD
<LLD 0
ZN-65 NA
<LLD
<LLD 0
NB-95 NA
<LLD
<LLD 0
ZR-95 NA
<LLD
<LLD 0
CS-134 50
<LLD
<LLD 0
)>
CS-137 60
<LLD
<LLD 0
I BA-140 NA
<LLD
<LLD 0
c,.,
LA-140 NA
<LLD
<LLD 0
AIR IODINE GAMMA 475 (E-3 PC/ICU.METER) 1-131 70
<LLD
<LLD 0
FOOD PRODUCTS GAMMA 29 (PCIIKG WET}
MN-54 NA
<LLD
<LLD 0
C0-58 NA
<LLD
<LLD 0
FE-59 NA
<LLD
<LLD 0
CO-60 NA
<LLD
<LLD 0
ZN-65 NA
<LLD
<LLD 0
NB-95 NA
<LLD
<LLD 0
ZR-95 NA
<LLD
<LLD 0
1-131 60
<LLD
<LLD 0
CS-134 60
<LLD
<LLD 0
CS-137 80
<LLD
<LLD 0
BA-140 NA
<LLD
<LLD 0
LA-140 NA
<LLD
<LLD 0
(M) The Mean Values are calculated using the positive values (values<!: MDC). (F) Fraction of detectable measurement are indicated in parentheses.
TABLEA-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL
SUMMARY
FOR THE LASALLE COUNTY STATION, 2023 NAME OF FACILITY:
LASALLE COUNTY STATION DOCKET NUMBER:
50-373 & 50-374 LOCATION OF FACILITY:
MARSEILLES, IL REPORTING PERIOD:
2023 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)
MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN(M)
MEAN (M)
MEAN (M)
STATION#
NONROUTINE (UNIT OF ANALYSES ANALYSES OF DETECTION (F)
(F)
(F)
NAME REPORTED MEASUREMEN"!).
PERFORMED PERFORMED
!LLD!
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS VEGETATION GAMMA 44 (PCIIKG WE1)
MN-54 NA
<LLD
<LLD 0
CO-58 NA
<LLD
<LLD 0
FE-59 NA
<LLD
<LLD 0
CO-60 NA
<LLD
<LLD 0
ZN-65 NA
<LLD
<LLD 0
NB-95 NA
<LLD
<LLD 0
ZR-95 NA
<LLD
<LLD 0
1-131 60
<LLD
<LLD 0
CS-134 60
<LLD
<LLD 0
CS-137 BO
<LLD
<LLD 0
BA-140 NA
<LLD
<LLD 0
)>
LA-140 NA
<LLD
<LLD 0
DIRECT RADIATION OSLD-QUARTERL Y 168 NA 18.0 14.2 19.9 L-112 INDICATOR 0
(MILLI-ROENTGENIQTR.)
(1641164)
(414)
(414) 13.8 - 22.0 12.5 - 15.1 18.9-21.1 0.9 MILES WSW (M) The Mean Values are calculated using the positive values (values 2: MDC). (F) Fraction of detectable measurement are indicated in parentheses.
APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS
Intentionally left blank
TABLE B-1:
Location A.
Surface Water L-21 L-40 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2023 Location Description Illinois River at Seneca, Upstream (control)
Illinois River, Downstream (indicator)
Distance & Direction From Site 4.0 miles NE 5.2 miles NNW B.
Ground/Well Water L-27 L-28-W4 L-28-W5 L-28-W6 LSCS Onsite Well (indicator)
Marseilles Well (control)
Marseilles Well (control)
Marseilles Well (indicator)
C.
Air Particulates/ Air Iodine L-01 L-03 L-04 L-05 L-06 L-07 L-08 L-10 L-11A D.
Food Products Quadrant 1 Quadrant 2 Quadrant 3 Quadrant 4 Control G.
Vegetation L-Veg C L-ESE 1 L-ESE 2 Nearsite 1 (indicator)
Onsite 3 (indicator)
Rte. 170 (indicator)
Onsite 5 (indicator)
Nearsite 6 (indicator)
Seneca (indicator)
Marseilles (indicator)
Streator (control)
Ransom (indicator)
LaSalle Cooling Lake (indicator)
Marseilles Pool of Illinois River, Downstream (indicator)
Illinois River, Upstream of Discharge (control)
Illinois River at Seneca, Upstream (control)
Illinois River, Downstream (indicator)
Illinois River, Downstream (indicator) 171 Valley View, Seneca IL 106 W. Thomas, Ransom, IL 2260 N 21" Road, Marseilles IL 2507 N. 2553 Rd., Marseilles IL Biros Farm Control Indicator Indicator 8-1 O miles at station 7.0 miles NNW 6.7 miles NNW 4.1milesN 1.5 miles NNW 1.0 miles ENE 3.2 miles E 0.3 miles ESE 0.4 miles W 5.2 miles NNE 6.0 miles NNW 13.5 miles SW 6.0 miles S 2.0 miles E 6.5 miles NNW 4.3 miles NE 4.0 miles NE 5.2 miles NNW 4.6 miles N 5.2 miles NE 6.0 miles S 3.2 miles WSW 4.3 miles NNW 14.2 miles E 9.5 miles ENE 1.5 miles ESE 6.0 miles ESE
TABLE B-1 :
Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2023 Location Location Description H.
Environmental Dosimetry - OSLO Inner Ring L-101-1 and -2 L-102-1 and -2 L-103-1 and -2 L-104-1 and -2 L-105-1 and -2 L-106-1 and -2 L-107-1 and -2 L-108-1 and -2 L-109-1 and -2 L-110-1 and -2 L-111b-1 and-2 L-112-1 and -2 L-113a-1 and -2 L-114-1 and -2 L-115-1 and -2 L-116-1 and -2 Outer Ring L-201-3 and -4 L-202-3 and -4 L-203-1 and -2 L-204-1 and -2 L-205A-1 and -2 L-205B-3 and -4 L-206-1 and -2 L-207-1 and -2 L-208-1 and -2 L-209-1 and -2 L-210-1 and -2 L-211-1 and -2 L-212-1 and -2 L-213-3 and -4 L-214-3 and -4 L-215-3 and -4 L-216-3 and -4 L-01-1 and -2 L-03-1 and -2 L-04-1 and -2 L-05-1 and -2 L-06-1 and -2 L-07-1 and -2 L-08-1 and -2 L-11A-1 and -2 Nearsite 1 (indicator)
Onsite 3 (indicator)
Rte. 170 (indicator)
Onsite 5 (indicator)
Nearsite 6 (indicator)
Seneca (indicator)
Marseilles (indicator)
Ransom (indicator)
Control and Special Interest L-10-1 and -2 Streator B-2 Distance & Direction From Site 0.5 miles N 0.6 miles NNE 0.7 miles NE 0.8 miles ENE 0.7 miles E 1.4 miles ESE 0.8 miles SE 0.5 miles SSE 0.6 miles S 0.6 miles SSW 0.8miles SW 0.9milesWSW 0.8milesW 0.9 miles WNW 0.7miles NW 0.6 miles NNW 4.0 miles N 3.6 miles NNE 4.0 miles NE 3.2 miles ENE 3.2 miles ESE 5.1 miles E 4.3 miles SE 4.5 miles SSE 4.5 miles S 4,0 miles SSW 3.3 miles SW 4.5 miles WSW 4.0milesW 4.9milesW 5.1 miles WNW 5.0miles NW 5.0miles NNW 1.5 miles NNW 1.0 miles ENE 3.2 miles E 0.3 miles ESE 0.4 milesW 5.2 miles NNE 6.0 miles NNW 6.0 miles S 13.5 miles SW
TABLE 8-2:
Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2023 Sample Analysis Sampling Method Analytical Procedure Number Medium Surface Water Gamma Monthly composite from TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy weekly grab samples.
Surface Water Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices weekly grab samples.
Surface Water Tritium Quarterly composite from TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation weekly grab samples.
Ground/Well Gamma Quarterly grab samples.
TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Water Spectroscopy Ground/Well Tritium Quarterly grab samples.
TBE, TBE-2011 Tritium Analysis in Drinking Water by Liquid Scintillation Water Gamma Semi-annual samples TBE-2007 Gamma-Emitting Radioisotope Analysis Fish Spectroscopy collected via electroshocking or other techniques Sediment Gamma Semi-annual TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy grab samples Air One-week composite of TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices Gross Beta continuous air sampling Particulates through glass fiber filter paper Air Gamma Quarterly composite of each TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Particulates Spectroscopy station Gamma Bi-weekly composite of TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Air Iodine Spectroscopy continuous air sampling through charcoal filter Food Gamma Annual grab samples.
TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Products Spectroscopy Vegetation Gamma Monthly grab samples during TBE, TBE-2007 Gamma-Emitting Radioisotope Analysis Spectroscopy growing season Optically Quarterly OSLDs comprised Stimulated OSLO Luminescence of two Al2O3:C Landauer Landauer Incorporated Dosimetry Incorporated elements.
B-3
t0 I
~
Figure B-1 Inner Ring OSLO Locations of the LaSalle County Station, 2023
Grand Ridge
--s1reator
- ...;_L-1 0 1
,-\\.f.
Marseilles '. *\\
L-11:=:*
I
- \\ :
L-215-3
- - *.. L-215-4 **
I k
I I
I I
I i
I I
I I
/
I /
I I
I I I I
I I Senec,a' L-07,,../,,,
I 1,, L-201-:3,1.. s.
I * -,.,"I I.
'L ')C1**1 r,
,,-/
', L-201-4,' -.:,..:<*.
"L **11*1*'., 4/'
- L-~03-2_.-* -
I I
-~ -,._.
- I
/.
{
u-14.3 L-01 \\
/
II,/
i' L-214-4..
L-204-1
- L-204-2
\\ i '
L L-~11 =:*4).. l_,;;~;-~-;:05:'.~:;~.~~~:~~~~L---*L--~:~;-* **
.,. y L-';il *,_*,
:_--?,,*:* --~-------
L-205-3
- t I I
- L" *1c. --------1 -2JS-4
- -~------
i 1
1 I
I I
I L-205-1 L-211 -1...*
I I
I I
I I
I L-211-2_.----L-210-1..
I I
L-210-/ '
- i1
- L-20'~-1 '
L-2C9-2 L * * *
.11_1:::.1 **
L-11,111 L 111\\
Ransom Figure B-2 L-207-1'
,, L-207-2 I
L-205-2 L-20ti-1 *. *-.
L-20ti-2 Outer Ring OSLO Locations and Fixed Air Sampling Locations of the LaSalle County Station, 2023 B-5
Ottawa
- \\
I
~
I
\\
\\
/
Marseilles*\\
1
~-
- L-23 #5 *
- _ J 11
/
.. L:'.t:\\#4 I
I f I*
- 11~:...,
- ~
- i'
\\
1, I Se nee~**
,., ' :1 L-40
\\
- ~-, ~ I
,Y,
\\
I
~,
I I
i, I
11 L-23 #6 1 1
1
\\
\\,:,
I
,I
\\,.
I I
,..... -,~
.. ~--~*
\\ \\ /
---~-----::.:. __ ~: -
\\
\\\\
/
\\,. *. **1
- .*.\\., \\ \\ /
Gr,nd rudge --------------~-~~~~:~~=.~1*
\\~=.::!~'.~
~::~--------------~---
(i 4.2 ~~ o~,t)
I I
11 11
\\
l
\\
\\,
-*. *streator I
I I
I I
I I
I l
\\
I I
I I
I I
I 1
1 I
I I
I I
I I
I I
I I
I I
I
/
'1 I
II I
1, I
I I
I I
I
/
Ransom
\\
i II I
I I
I I
I I
I I
I I
I I
I I
I I
1, I
I Figure 8-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2023 B-6
APPENDIX C DATA TABLES AND FIGURES
Intentionally left blank
Table C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 Table C-I.2 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD L-21 L-40 01/05/23 - 01/26123 7.8 +/- 2.5 9.8 +/- 2.7 02/09/23 - 02/23123 9.0 +/- 2.6 8.1 +/- 2.6 03/01/23 - 03/29/23 4.3 +/- 2.2 5.9 +/- 2.3 04/06/23 - 04/28/23 6.1 +/- 2.3 7.0 +/- 2.4 05104/23 - 05/31/23 8.6 +/- 2.3 8.9 +/- 2.3 06/08/23 - 06/28/23 8.6 +/- 2.5 8.9 +/- 2.4 07 /06/23 - 07 /27 /23 6.9 +/- 2.5 6.8 +/- 2.5 08/02/23 - 08131 /23 5.7 +/- 2.2 5.8 +/- 2.3 09/06/23 - 09/27123 7.1 +/-2.2 9.8 +/- 2.4 10/04/23 - 10/26123 9.2 +/- 2.4 7.6 +/- 2.3 11/01/23 - 11/30/23 8.1 +/- 2.9 7.7 +/- 2.8 12/06/23 - 12/27/23 8.0 +/- 2.7 9.6 +/- 2.8 (1) MEAN+/- 2 STD DEV 7.4 +/- 3.0 8.0 +/- 2.9 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RES UL TS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD L-21 L-40 01105/23 - 03/29/23 325 +/- 133 305 +/- 128 01/05/23 - 03/29/23 Recount 364 +/- 136 340 +/- 133 01 /05/23 - 03/29/23 Reanalysis 339 +/- 134 364 +/- 131 04/06/23 - 06128/23 302 +/- 123 270 +/- 121 04/06/23 - 06/28/23 Recount
< 185 307 +/- 129 04/06/23 - 06/28123 Reanalysis 190 +/- 120 324 +/- 125 07/06/23 - 09/27/23
< 197 197 +/- 127 10/04/23 - 12/27 /23
< 197
< 199 (1) MEAN+/- 2 STD DEV 304 +/- 135 301 +/- 109 (1) THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (VALUES.? MDC)
C-1
Table C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 L-21 01/05/23 - 01/26/23
< 2
< 3
< 6
< 3
< 5
< 3
< 5
< 9
< 3
< 2
< 21
< 7 02/09/23 - 02/23/23
< 3
< 3
< 7
<4
< 6
< 3
< 6
< 10
< 3
< 3
< 21
<7 03/01/23 - 03/29/23
< 1
< 1
< 3
<2
< 3
< 1
< 3
< 7
< 1
< 1
< 13
<4 04/06/23 - 04/28/23
< 4
<4
< 10
< 4
< 6
<4
< 7
< 12
< 3
<4
< 28
< 11 05/04/23 - 05/31/23
< 2
< 2
< 5
< 2
< 4
< 2
<4
< 12
< 2
< 2
< 22
< 6 06/08/23 - 06/28/23
< 2
< 2
< 5
< 2
< 4
< 2
<4
< 14
< 2
< 2
< 21
< 7 07 /06/23 - 07127123
<2
< 2
< 5
< 2
< 4
< 2
<4
< 9
< 2
< 2
< 18
< 5 08/02/23 - 08/31 /23
< 2
< 2
< 5
< 2
<4
< 2
<4
< 11
< 2
< 2
< 18
< 7 09/06/23 - 09/27 /23
< 2
< 2
<4
< 2
<4
< 2
< 3
< 8
<2
< 2
< 15
<6 10/04/23 - 10/26/23
<4
<4
< 9
< 3
< 7
<4
< 6
< 14
<4
<4
< 31
< 11 11/01/23 - 11/30/23
< 2
< 2
< 5
< 2
< 4
< 2
< 4
< 10
< 2
< 2
< 20
< 6 12/06/23 - 12/27 /23
< 1
< 1
< 3
< 1
< 3
< 1
< 2
< 6
< 1
< 1
< 11
<4 MEAN 0
I N L-40 01 /05/23 - 01/26/23
<2
< 2
< 5
< 2
< 5
< 2
<4
< 8
< 2
< 2
< 18
< 5 02/09/23 - 02/23/23
< 4
<4
< 9
< 5
< 7
< 4
< 7
< 9
<4
<4
< 24
< 8 03/01/23 - 03/29/23
< 2
< 2
< 4
< 2
< 3
< 2
< 3
< 9
< 2
< 2
< 16
< 6 04/06/23 - 04/28/23
< 4
<4
< 9
<4
< 8
< 4
< 8
< 14
< 3
<4
< 26
< 10 05/04/23 - 05/31 /23
< 1
< 2
<4
< 2
< 3
< 2
< 3
< 9
< 2
< 2
< 16
< 5 06/08/23 - 06/28/23
<2
< 2
< 5
< 2
< 4
< 2
<4
< 13
< 2
< 2
< 20
< 7 07/06/23
- 07/27/23
<2
< 2
< 5
< 2
<4
< 2
<4
< 8
< 2
< 2
< 15
< 5 08/02/23 - 08/31 /23
< 1
< 2
<4
< 2
< 3
< 2
< 3
< 10
< 2
< 2
< 17
< 6 09/06/23 - 09/27 /23
<2
< 2
<4
< 2
<4
< 2
<4
< 8
< 2
< 2
< 15
< 6 10/04/23 - 10/26/23
< 3
<4
< 8
<4
< 8
< 4
< 6
< 14
< 4
< 2
< 29
< 10 11/01/23 - 11/30/23
<2
< 2
< 5
< 3
< 5
< 2
< 5
< 11
< 2
< 2
< 22
< 8 12/06/23 12/27/23
<2
<2
< 5
< 2
< 4
<2
<4
< 8
< 2
< 2
< 16
< 5 MEAN
Table C-11.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD L-27 L-28-W4 L-28-W5 L-28-W6 01/11/23 - 01/11/23
< 176
< 181
< 194 04/13/23 - 04/13/23
< 186
< 172
< 176 07/12/23 - 07/12/23
< 193
< 196
< 192 10/11/23 - 10/11/23
< 187
< 191
< 190 MEAN C-3
Table C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-27 01/11/23 - 01/11/23
< 7
< 5
< 11
<6
< 15
< 6
< 11
< 7
< 8
< 28
< 11 04/13/23 - 04/13/23
< 5
< 7
< 15
< 10
< 16
< 8
< 14
< 9
< 10
< 33
< 8 07 /12/23 - 07 /12/23
< 6
< 5
< 12
< 6
< 13
< 8
< 10
< 6
<6
< 26
< 14 10/11/23 - 10/11/23
< 7
< 7
< 16
< 9
< 16
< 9
< 12
< 7
< 7
< 34
< 14 MEAN L-28-W4 01/11/23 - 01/11/23
< 7
< 9
< 16
< 6
< 16
< 5
< 10
< 7
< 6
< 34
< 7 07/12/23 - 07/12/23
< 7
< 7
< 12
< 6
< 5
< 8
< 13
< 8
< 7
< 30
< 8 MEAN L-28-W5 04/13/23 - 04/13/23
<6
< 6
< 12
< 10
< 16
< 7
< 11
< 7
< 7
< 35
< 11 10/11/23
- 10/11/23
< 7
< 7
< 11
< 7
< 18
< 10
< 8
< 8
< 7
< 34
< 12 0
MEAN I
~
L-28-W6 01/11/23 - 01/11/23
< 8
< 7
< 13
< 9
< 10
< 4
< 11
< 8
< 5
< 37
< 12 04/13/23
- 04/13/23
< 7
< 7
< 14
< 7
< 14
< 8
< 11
< 7
< 7
< 33
< 6 07/12/23 - 07/12/23
<6
< 7
< 13
< 7
< 11
< 8
< 14
<6
< 8
< 28
< 10 10/11/23 10/11/23
< 7
< 7
< 14
< 8
< 15
< 8
< 13
< 7
< 7
< 38
< 4 MEAN
Table C-111.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-34 Largemouth Bass 05/08/23
< 50
< 43
< 134
< 102
< 122
< 59
< 112
< 65
< 57
< 356
< 149 Channel Catfish 05108/23
< 64
< 54
< 107
< 71
< 115
< 57
< 99
< 51
< 59
< 392
< 147 Largemouth Bass 10/05123
< 31
< 39
< 93
< 31
< 63
< 37
< 64
< 32
< 36
< 233
< 85 Bluegill 10/05/23
< 33
< 36
< 70
< 38
< 69
< 33
< 58
< 37
< 31
< 205
< 69 MEAN L-35 Channel Catfish 05/09/23
< 61
< 92
< 162
< 96
< 174
< 83
< 151
< 77
< 75
< 632
< 160 Smallmouth Bass 05/09/23
< 78
< 76
< 187
< 90
< 138
< 77
< 150
< 82
< 71
< 628
< 188 Channel Catfish 10/05/23
< 46
< 44
< 96
< 45
< 96
< 49
< 74
< 50
< 46
< 315
< 97 Smallmouth Bass 10/05/23
< 33
< 33
< 89
< 37
< 68
< 35
< 58
< 38
< 29
< 200
< 67 0
MEAN I 01 L-36 Smallmouth Buffalo 05/09/23 42 53 159 52
< 117 64
< 118 63 49 438 131 Channel Catfish 05/09/23 57 65 157 56
< 151 60
< 122 70 63 431 171 Smallmouth Bass 10/05/23 44 41
< 96.7 49
< 103 50 84
< 44 43 305 92 Channel Catfish 10/05/23 32 33
< 73.5 37 68 35 50 34 30 203 71 MEAN
Table C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/KG DRY+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-21 05/17/23
< 97
< 93
< 170
< 104
< 244
< 91
< 174
< 116
< 124
< 428 152 10/28/23
< 96
< 65
< 207
< 132
< 213
< 108
< 195
< 117
< 129
< 453 160 MEAN L-40 05/17/23
< 78
< 100
< 202
< 97
< 223
< 88
< 160
< 104
< 111
< 420
< 114 10/28/23
< 78
< 77
< 181
< 84
< 163
< 79
< 145
< 76
< 94
< 286
< 127 MEAN L-41 05/09/23
< 49
< 42
< 131
< 61
< 137
< 60
< 93
< 68
< 54
< 342
< 159 10/05/23
< 88
< 71
< 184
< 81
< 174
< 109
< 116
< 93
< 72
< 505
< 156 0
MEAN I 0,
Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP Ill GROUP IV PERIOD L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-11A L-10 12128122 - 01105123 27 +/- 4 29 +/- 5 32 +/- 5 26 +/- 4 30 +/- 5 32 +/- 5 32 +/- 5 26 +/- 4 32 +/- 5 01105123 - 01111123 29 +/- 5 29 +/- 5 33 +/- 5 27 +/- 5 32 +/- 5 26 +/- 5 32 +/- 5 28 +/- 5 30 +/- 5 01111123 - 01119123 (1) 21 +/- 4 24 +/- 4 13 +/- 3 22 +/- 4 24 +/- 4 25 +/- 4 23 +/- 4 21 +/- 4 01119/23 - 01126123 18 +/- 3 13 +/- 4 14 +/- 4 17 +/- 4 19 +/- 4 19 +/- 5 18 +/- 4 18 +/- 4 17 +/- 4 01126123 - 02101123 22 +/- 5 21 +/- 5 24 +/- 6 25 +/- 6 19 +/- 5 25 +/- 6 21 +/- 5 20 +/- 5 18 +/- 5 02101123 - 02109123 26 +/- 5 22 +/- 5 29 +/- 5 25 +/- 5 25 +/- 5 24 +/- 5 20 +/- 4 27 +/- 5 24 +/- 5 02109123 - 02116123 16 +/- 4 13 +/- 4 15 +/- 4 15 +/- 4 16 +/- 4 14 +/- 4 14 +/- 4 19 +/- 5 14 +/- 4 02116123 - 02123123 12 +/- 4 15 +/- 4 20 +/- 4 13 +/- 4 18 +/- 4 19 +/- 4 10 +/- 4 15 +/- 4 11 +/- 4 02123123 - 03101123 20 +/- 5 16 +/- 4 15 +/- 4 15 +/- 5 16 +/- 5 15 +/- 5 19 +/- 5 16 +/- 5 19 +/- 5 03101123 - 03109123 11 +/- 3 21 +/- 4 17 +/- 4 11 +/- 3 14 +/- 4 12 +/- 4 10 +/- 3 14 +/- 4 15 +/- 4 03109123 - 03116123 12 +/- 4 14 +/- 4 14 +/- 4 16 +/- 4 12 +/- 4 (1) 11 +/- 4 15 +/- 4 12 +/- 4 03116123 - 03123123 20 +/- 4 23 +/- 5 9 +/- 4 22 +/- 5 22 +/- 5 15 +/- 4 18 +/- 4 10 +/- 4 21 +/- 4 03123/23 - 03129123 20 +/- 5 23 +/- 5 24 +/- 5 11 +/- 4 10 +/- 4 20 +/- 5 22 +/- 5 14 +/- 5 27 +/- 5 03129123 - 04106123 17 +/- 4 14 +/- 4 19 +/- 4 15 +/- 4 17 +/- 4 19 +/- 4 20 +/- 4 21 +/- 4 20 +/- 4 04106123 - 04113123 22 +/- 5 29 +/- 5 30 +/- 5 26 +/- 5 26 +/- 5 24 +/- 5 24 +/- 5 26 +/- 5 27 +/- 5 04113123 - 04120123 15 +/- 4 13 +/- 4 16 +/- 4 14 +/- 8 18 +/- 4 16 +/- 4 17 +/- 4 18 +/- 4 13 +/- 4 04120123 - 04128123 9 +/- 3 15 +/- 4 13 +/- 3 11 +/- 3 13 +/- 3 13 +/- 3 12 +/- 3 12 +/- 4 13 +/- 3 04128123 - 05104123 5+/-4 8 +/- 4 9 +/- 4 9 +/- 4 11 +/- 4 6 +/- 4 8+/-4 9 +/- 4 10 +/- 4 05104123 - 05111123 17 +/- 4 16 +/- 4 15 +/- 4 21 +/- 4 15 +/- 4 20 +/- 4 19 +/- 4 22 +/- 4 18 +/- 4 05/11123 - 05118123 15 +/- 4 16 +/- 4 18 +/- 4 14 +/- 4 15 +/- 4 14 +/- 4 18 +/- 4 15 +/- 4 19 +/- 4 05118/23 - 05125123 15 +/- 4 18 +/- 4 16 +/- 4 21 +/- 4 19 +/- 4 17 +/- 4 14 +/- 4 16 +/- 4 18 +/- 4 05125123 - 05131123 12 +/- 4 16 +/- 4 17 +/- 5 21 +/- 5 18 +/- 5 22 +/- 5 22 +/- 5 15 +/- 5 19 +/- 5 05131123 - 06108123 17 +/- 4 20 +/- 4 22 +/- 4 22 +/- 4 26 +/- 4 24 +/- 4 22 +/- 4 20 +/- 4 22 +/- 4 06108123 - 06115123 14 +/- 4 15 +/- 4 15 +/- 4 11 +/- 4 16 +/- 4 7 +/- 4 15 +/- 4 13 +/- 4 16 +/- 4 06115123 - 06122123 16 +/- 4 21 +/- 4 17 +/- 4 18 +/- 4 19 +/- 4 21 +/- 4 18 +/- 4 22 +/- 5 26 +/- 5 06122/23 - 06128123 20 +/- 5 19 +/- 4 15 +/- 4 19 +/- 5 18 +/- 4 20 +/- 5 16 +/- 4 17 +/- 4 18 +/- 4 06128123 - 07106123 24 +/- 4 24 +/- 4 28 +/- 4 25 +/- 4 23 +/- 4 24 +/- 4 25 +/- 4 22 +/- 4 22 +/- 4 07106123 - 07112123 17 +/- 5 14 +/- 5 8 +/- 4 19 +/- 5 7 +/- 4 21 +/- 5 14 +/- 5 13 +/- 5 21 +/- 5 07112123 - 07120123 18 +/- 4 21 +/- 4 16 +/- 4 16 +/- 4 14 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 13 +/- 3 07120123 - 07127123 22 +/- 4 21 +/- 4 23 +/- 4 27 +/- 5 23 +/- 4 24 +/- 4 25 +/- 5 24 +/- 5 25 +/- 5 07127/23 - 08102123 11 +/- 5 14 +/- 5 12 +/- 5 16 +/- 5 17 +/- 5 15 +/- 5 16 +/- 5 16 +/- 5 15 +/- 5 08102123 - 08110123 18 +/- 4 21 +/- 4 19 +/- 4 21 +/- 4 21 +/- 4 22 +/- 4 26 +/- 4 20 +/- 4 21 +/- 4 08110123 - 08117/23 17 +/- 4 16 +/- 4 14 +/- 4 19 +/- 4 22 +/- 4 18 +/- 4 16 +/- 4 16 +/- 4 16 +/- 4 08117123 - 08124123 27 +/- 5 30 +/- 5 26 +/- 5 31 +/- 5 30 +/- 5 27 +/- 5 28 +/- 5 30 +/- 5 24 +/- 5 08124/23 - 08131123 18 +/- 4 18 +/- 4 18 +/- 4 20 +/- 5 16 +/- 4 17 +/- 4 15 +/- 4 17 +/- 5 16 +/- 4 08131123 - 09106123 19 +/- 5 16 +/- 5 17 +/- 5 18 +/- 5 20 +/- 5 15 +/- 5 20 +/- 5 17 +/- 5 23 +/- 5 09106123 - 09114123 15 +/- 4 13 +/- 4 18 +/- 4 16 +/- 4 12 +/- 3 15 +/- 4 14 +/- 4 15 +/- 4 17 +/- 4 09114123 - 09121123 23 +/- 5 22 +/- 5 22 +/- 5 22 +/- 5 25 +/- 5 27 +/- 5 21 +/- 5 22 +/- 5 19 +/- 5 09121/23 - 09127123 30 +/- 5 35 +/- 6 31 +/- 6 30 +/- 6 32 +/- 6 35 +/- 6 31 +/- 5 29 +/- 6 35 +/- 6 09127123 - 10104123 33 +/- 5 33 +/- 5 35 +/- 5 33 +/- 5 33 +/- 5 36 +/- 5 34 +/- 5 36 +/- 5 36 +/- 5 10104123 - 10111123 14 +/- 4 17 +/- 4 20 +/- 4 16 +/- 4 13 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 15 +/- 4 10111123 - 10119123 21 +/- 4 19 +/- 4 22 +/- 4 25 +/- 4 21 +/- 4 24 +/- 4 25 +/- 4 22 +/- 4 23 +/- 4 10119123 - 10126123 28 +/- 5 24 +/- 5 22 +/- 5 28 +/- 5 24 +/- 5 27 +/- 5 26 +/- 5 22 +/- 5 29 +/- 5 10126123 - 11/01123 22 +/- 5 16 +/- 4 17 +/- 4 19 +/- 5 18 +/- 5 18 +/- 4 17 +/- 4 22 +/- 5 19 +/- 5 11101123 - 11109123 31 +/- 5 32 +/- 5 32 +/- 5 32 +/- 5 31 +/- 5 29 +/- 5 32 +/- 5 35 +/- 5 37 +/- 5 11109123 - 11116123 20 +/- 5 18 +/- 4 17 +/- 4 22 +/- 5 23 +/- 5 25 +/- 5 22 +/- 5 17 +/- 4 23 +/- 5 11116123 - 11122123 12 +/- 4 12 +/- 4 10 +/- 4 15 +/- 5 18 +/- 5 13 +/- 5 16 +/- 5 17 +/- 5 15 +/- 5 11122123 - 11130123 24 +/- 4 26 +/- 4 26 +/- 4 21 +/- 4 21 +/- 4 21 +/- 4 21 +/- 4 24 +/- 4 25 +/- 4 11130123 - 12106123 21 +/- 5 21 +/- 5 20 +/- 5 17 +/- 4 18 +/- 4 18 +/- 4 20 +/- 5 17 +/- 5 21 +/- 5 12106123 - 12114123 23 +/- 4 22 +/- 4 19 +/- 4 22 +/- 4 21 +/- 4 22 +/- 4 19 +/- 4 22 +/- 4 26 +/- 4 12114123 - 12121123 23 +/- 5 25 +/- 5 26 +/- 5 24 +/- 5 22 +/- 4 24 +/- 5 26 +/- 5 24 +/- 5 26 +/- 5 12121123 - 12127123 20 +/- 5 25 +/- 5 21 +/- 5 23 +/- 5 21 +/- 5 27 +/- 5 28 +/- 5 23 +/- 5 24 +/- 5 12127123 - 01/04124 16 +/- 4 17 +/- 4 15 +/- 4 17 +/- 4 19 +/- 4 18 +/- 4 18 +/- 4 19 +/- 4 19 +/- 4 (2) MEAN+/- 2 STD DEV 19 +/- 12 20 +/- 12 20 +/- 13 20 +/- 12 20 +/- 12 20 +/- 12 20 +/- 12 20 +/- 11 21 +/- 12 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION (2) THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (VALUES ;? MDC)
C-7
Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA GROUP 1-ONSITE LOCATIONS GROUP 11
- NEAR-SITE LOCATIONS GROUP 111 - FAR-FIELD LOCATIONS GROUP IV - CONTROL LOCATION COLLECTION MIN MAX MEAN +/-
COLLECTION MIN MAX MEAN+/-
COLLECTION MIN MAX MEAN +/-
COLLECTION MIi\\ MAX MEAN +/-
PERIOD 2SD PERIOD 2SD PERIOD 2SD PERIOD 2SD 12/28/22 - 02/01/23 13 29 23 +/- 11 12/28/22
- 02/01/23 13 33 24 +/- 14 12/28/22 - 02/01/23 18 32 24 +/- 10 12/28/22 - 02/01/23 17 32 24 +/- 14 02/01/23
- 03/01/23 12 26 18 +/- 9 02/01/23 - 03/01/23 13 29 18 +/- 11 02/01 /23
- 03/01 /23 10 27 18 +/- 9 02/01/23 - 03/01/23 11 24 17 +/- 11 03/01/23 - 03/29/23 11 23 18 +/- 9 03/01/23
- 03/29/23 9
24 16 +/- 11 03/01 /23
- 03/29/23 10 22 15 +/- 8 03/01/23
- 03/29/23 12 27 19 +/- 13 03/29/23
- 04/28/23 9
29 17 +/- 12 03/29/23 - 04/28/23 11 30 18 +/- 13 03/29/23
- 04/28/23 12 26 19 +/- 10 03/29/23
- 04/28/23 13 27 18 +/- 14 04/28/23 - 05/31/23 5
18 14 +/- 8 04/28/23 - 05/31/23 9
21 16 +/- 9 04/28/23 - 05/31 /23 6
22 16 +/- 9 04/28/23 - 05/31 /23 10 19 17 +/- 8 05/31 /23 - 06/28/23 14 21 18 +/- 5 05/31/23 - 06/28/23 11 22 17 +/- 7 05/31 /23 - 06/28/23 7
26 18 +/- 9 05/31 /23 - 06/28/23 16 26 20 +/- 9 06/28/23 - 08/02/23 11 24 19 +/- 9 06/28/23 - 08/02/23 8
28 19 +/- 13 06/28/23 - 08/02/23 7
25 18 +/- 10 06/28/23 - 08/02/23 13 25 19 +/- 10 08/02/23 -
08/31 /23 16 30 20 +/- 10 08/02/23
- 08/31 /23 14 31 21 +/- 11 08/02/23 - 08/31 /23 15 30 21 +/- 11 08/02/23 - 08/31 /23 16 24 19 +/- 8 08/31 /23 - 10/04/23 13 35 24 +/- 17 08/31 /23 - 10/04/23 16 35 24 +/- 15 08/31 /23 - 10/04/23 12 36 24 +/- 17 08/31 /23 - 10/04/23 17 36 26 +/- 18 10/04/23 - 11/01/23 14 28 20 +/- 9 10/04/23 - 11 /01 /23 16 28 21 +/- 8 10/04/23 - 11/01/23 13 27 20 +/- 8 10/04/23 - 11/01/23 15 29 21 +/- 12 11/01/23 - 11/30/23 12 32 22 +/- 15 11/01/23 - 11/30/23 10 32 22 +/- 16 11/01/23 - 11/30/23 13 35 23 +/- 13 11/01/23 - 11/30/23 15 37 25 +/- 18 0.
11/30/23 - 01 /04/24 16 25 21 +/- 6 11/30/23
- 01/04/24 15 26 20 +/- 7 11/30/23 - 01/04/24 17 28 21 +/- 7 11/30/23 - 01/04/24 19 26 23 +/- 6 CCI 12/28/22
- 01/04/24 5
35 19 +/- 12 12/28/22
- 01/04/24 8
35 20 +/- 12 12/28/22 - 01/04/24 6
36 20 +/- 12 12/28/22 - 01 /04/24 10 37 21 +/- 12
Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-01 12/28/22 - 03/29/23
< 3
< 5
< 16
<4
< 8
<6
< 10
< 3
<4
< 660
< 276 03/29/23 - 06/28/23
<4
< 6
< 21
< 3
< 10
< 7
< 10
<4
< 3
< 374
< 150 06/28/23 - 10/04/23
< 2
< 2
< 10
< 2
< 5
< 4
<6
< 2
<2
< 140
< 88 10/04/23 - 01/04/24
< 3
< 5
< 14
< 2
<6
< 5
< 7
< 3
< 2
< 211
< 85 MEAN L-03 12/28/22 - 03/29/23
< 2
< 3
< 12
< 2
< 5
< 3
< 7
< 2
< 2
< 362
< 154 03/29/23 - 06/28/23
< 2
<4
< 8
< 2
< 7
< 3
<6
< 2
< 2
< 251
< 120 06/28/23 - 10/04/23
< 3
< 2
< 7
< 3
<4
< 3
< 5
< 2
< 2
< 172
< 92 10/04/23 - 01/04/24
< 3
< 3
< 10
< 3
< 7
<4
< 6
< 2
< 2
< 170
< 71 MEAN 0
L-04 12/28/22 - 03/29/23
< 3
< 3
< 15
< 1
< 3
<4
< 7
< 2
< 2
< 429
< 205 I
CD 03/29/23 - 06/28/23
< 2
< 3
< 11
< 3
<4
<4
<4
< 2
< 2
< 185
< 144 06/28/23 - 10/04/23
< 3
< 5
< 10
< 4
< 6
<4
< 7
< 3
< 2
< 208
< 98 10/04/23 - 01/04/24
< 2
< 3
< 10
< 2
< 6
<4
< 5
< 2
< 1
< 158
< 92 MEAN L-05 12/28/22 - 03/29/23
< 2
< 5
< 9
< 3
< 6
<4
< 7
< 2
< 2
< 393
< 153 03/29/23 - 06/28/23
< 3
< 5
< 10
< 4
< 8
< 5
< 9
< 3
< 3
< 404
< 175 06/28/23 - 10/04/23
< 2
< 3
< 8
< 1
< 6
<4
< 6
< 2
< 1
< 135
< 51 10/04/23 - 01/04/24
< 3
< 4
< 9
< 2
<6
<4
< 8
< 2
< 2
< 180
< 37 MEAN L-06 12/28/22 - 03/29/23
< 2
<4
< 12
< 2
< 5
<4
< 7
< 2
< 2
< 416
< 156 03/29/23 - 06/28/23
< 2
< 4
< 10
< 3
< 5
< 3
< 6
< 2
< 2
< 316
< 109 06/28/23 - 10/04/23
< 3
<4
< 11
< 3
< 7
<4
< 9
< 3
< 3
< 238
< 79 10/04/23 - 01/04/24
< 4
< 5
< 16
< 3
< 8
< 6
< 10
< 4
< 3
< 295
< 123 MEAN
Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-07 12/28/22 - 03/29/23
< 3
< 3
< 15
< 3
< 7
< 5
< 7
< 3
< 2
< 400
< 195 03/29/23 - 06/28/23
< 2
< 3
< 8
< 2
< 6
<4
< 8
< 3
< 2
< 293
< 169 06/28/23 - 10/04/23
< 2
< 3
< 10
< 2
< 6
<4
< 6
< 2
< 1
< 150
< 84 10/04/23 - 01/04/24
< 2
<4
< 12
< 2
< 5
< 5
< 5
< 3
< 2
< 161
< 57 MEAN L-08 12/28/22 - 03/29/23
<4
< 5
< 25
<5
< 7
< 5
< 13
< 3
< 2
< 645
< 267 03/29/23 - 06/28/23
< 3
<4
< 13
< 3
< 8
< 5
< 8
< 3
< 2
< 400
< 195 06/28/23 - 10/04/23
< 2
<4
< 8
< 2
< 6
< 3
< 5
<2
< 2
< 227
< 105 10/04/23 01/04/24
< 2
< 3
< 9
< 2
< 5
< 3
< 5
< 2
< 2
< 161
< 46 MEAN
(")
L-10 12/28/22 03/29/23
< 2
< 2
< 14
< 2
< 5
< 8 I
< 4
<2
< 1
< 378
< 198 0
03/29/23 - 06/28/23
< 2
< 3
< 7
< 2
<6
< 3
< 8
< 2
< 2
< 222
< 56 06/28/23 - 10/04/23
<4
< 7
< 15
<4
< 8
<6
< 8
< 3
< 3
< 227
< 115 10/04/23 - 01/04/24
< 1
< 3
< 8
< 2
< 5
<4
< 6
< 2
< 1
< 159
< 82 MEAN L-11A 12/28/22 03/29/23
< 2
<4
< 8
< 2
< 3
<4
< 9
< 2
< 2
< 406
< 150 03/29/23 06/28/23
< 3
<4
< 10
< 2
< 8
<4
< 8
< 2
< 2
< 307
< 59 06/28/23 10/04/23
< 1
<4
< 13
< 2
< 6
< 3
< 5
<2
< 2
< 210
< 103 10/04/23 - 01 /04/24
< 3
<4
< 11
< 3
< 8
< 5
< 9
< 3
< 3
< 244
< 95 MEAN
Table C-Vl.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP Ill GROUP IV PERIOD L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-11A L-10 12128122 - 01105123
< 53
< 26
< 52
< 47
< 52
< 49
< 49
< 24
< 48 01105123 - 01111123
< 56
< 57
< 56
< 39
< 55
< 41
< 41
< 17
< 39 01111123 - 01119123
< 11
< 42
< 41
< 48
< 42
< 52
< 35
< 51
< 49 01119123 - 01126123 (1)
< 38
< 35
< 38
< 36
< 24
< 50
< 50
< 48 01126123 - 02101123
< 63
< 63
< 65
< 34
< 31
< 34
< 34
< 14
< 33 02101123 - 02109123
< 48
< 25
< 47
< 48
< 46
< 54
< 54
< 26
< 53 02109123 - 02116123
< 45
< 23
< 47
< 46
< 45
< 60
< 60
< 29
< 58 02116123 - 02123123
< 50
< 50
< 50
< 28
< 50
< 57
< 58
< 56
< 56 02123123 - 03101123
< 58
< 57
< 59
< 57
< 58
< 59
< 58
< 28
< 58 03101123 - 03109123
< 29
< 28
< 28
< 24
< 27
< 49
< 50
< 49
< 47 03109123 - 03116123
< 55
< 28
< 55
< 44
< 54 (1)
< 22
< 46
< 43 03116123 - 03123123
< 48
< 25
< 47
< 48
< 48
< 49
< 49
< 24
< 47 03123123 - 03129123
< 52
< 26
< 51
< 30
< 54
< 30
< 13
< 31
< 30 03129123 - 04106123
< 35
< 36
< 35
< 17
< 34
< 31
< 32
< 31
< 31 04106123 - 04113123
< 68
< 34
< 66
< 47
< 65
< 50
< 25
< 50
< 49 04113123 - 04120123
< 46
< 48
< 48
< 65
< 23
< 51
< 49
< 51
< 49 04120123 - 04128123
< 47
< 47
< 46
< 28
< 46
< 28
< 27
< 12
< 27 04128123 - 05104123
< 60
< 59
< 60
< 47
< 61
< 48
< 48
< 21
< 49 05104123 - 05111123
< 41
< 60
< 61
< 27
< 61
< 55
< 54
< 56
< 54 05111123 - 05118123
< 27
< 27
< 28
< 12
< 28
< 46
< 45
< 45
< 45 05118123 - 05125123
< 56
< 54
< 55
< 65
< 55
< 65
< 65
< 32
< 64 05125123 - 05131123
< 39
< 38
< 40
< 40
< 17
< 37
< 37
< 16
< 36 05131123 - 06108123
< 56
< 27
< 53
< 12
< 55
< 27
< 27
< 27
< 27 06108123 - 06115123
< 53
< 54
< 52
< 19
< 53
< 19
< 18
< 8
< 18 06115123 - 06122123
< 25
< 25
< 25
< 24
< 25
< 23
< 23
< 24
< 11 06122123 - 06128123
< 40
< 40
< 40
< 35
< 40
< 34
< 34
< 35
< 13 06128123 - 07106123
< 31
< 31
< 31
< 27
< 31
< 62
< 62
< 63
< 60 07106123 - 07112123
< 61
< 60
< 60
< 28
< 29
< 57
< 56
< 57
< 56 07112123 - 07120123
< 53
< 53
< 51
< 54
< 23
< 32
< 32
< 34
< 30 07120123 - 07127123
< 57
< 26
< 57
< 57
< 57
< 59
< 59
< 41
< 61 07127123 - 08102123
< 17
< 40
< 40
< 35
< 40
< 36
< 36
< 16
< 37 08102123 - 08110123
< 28
< 27
< 27
< 12
< 27
< 36
< 36
< 36
< 36 08110123 - 08117123
< 45
< 44
< 45
< 47
< 45
< 46
< 45
< 23
< 45 08117123 - 08124123
< 61
< 29
< 60
< 41
< 61
< 41
< 40
< 41
< 19 08124123 - 08131123
< 53
< 36
< 53
< 29
< 52
< 12
< 30
< 30
< 30 08131123 - 09106123
< 58
< 56
< 57
< 63
< 28
< 63
< 62
< 62
< 30 09106123 - 09114123
< 55
< 27
< 54
< 41
< 54
< 40
< 40
< 32
< 40 09114123 - 09121123
< 43
< 43
< 43
< 25
< 43
< 37
< 36
< 37
< 36 09121123 - 09127123
< 47
< 47
< 49
< 23
< 48
< 50
< 49
< 33
< 49 09127123 - 10104123
< 17
< 39
< 38
< 39
< 38
< 67
< 66
< 29
< 66 10104123 - 10111123
< 35
< 35
< 35
< 53
< 34
< 52
< 52
< 26
< 51 10111123 - 10119123
< 39
< 38
< 39
< 19
< 39
< 57
< 58
< 58
< 57 10119123 - 10126123
< 33
< 33
< 33
< 39
< 34
< 38
< 38
< 19
< 38 1 0126123 - 11101123
< 65
< 64
< 66
< 65
< 30
< 63
< 62
< 28
< 64 11101123 - 11109123
< 46
< 46
< 44
< 22
< 42
< 53
< 53
< 28
< 53 11109123 - 11116123
< 30
< 66
< 66
< 58
< 66
< 58
< 58
< 31
< 57 11116123 - 11122123
< 62
< 62
< 62
< 30
< 58
< 51
< 51
< 24
< 50 11122123 - 11130123
< 49
< 49
< 49
< 34
< 48
< 55
< 54
< 27
< 54 11130123 - 12106123
< 67
< 66
< 66
< 46
< 66
< 59
< 59
< 28
< 57 12106123 12114123
< 19
< 36
< 35
< 36
< 35
< 24
< 24
< 17
< 24 12114123 - 12121123
< 51
< 51
< 51
< 26
< 49
< 37
< 37
< 25
< 36 12121123 - 12127123
< 36
< 36
< 42
< 38
< 37
< 38
< 39
< 19
< 38 12127123 - 01104124
< 29
< 30
< 28
< 20
< 29
< 41
< 41
< 21
< 41 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-11
Table C-Vll.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 L-42 Pasturage 01/05123
< 43
< 38
< 74
< 48
< 95
< 43
< 76
< 53
< 53
< 43
< 164
< 53 Pasturage 02101123
< 21
< 21
< 45
< 23
< 49
< 23
< 38
< 39
< 28
< 23
< 104
< 35 Pasturage 03101123
< 32
< 28
< 70
< 34
< 63
< 33
< 48
< 56
< 32
< 33
< 145
< 43 Pasturage 04106123
< 31
< 31
< 80
< 38
< 77
< 26
< 49
< 37
< 37
< 30
< 110
< 25 Pasturage 05104123
< 31
< 33
< 57
< 36
< 68
< 25
< 52
< 43
< 32
< 30
< 143
< 28 Pasturage 05118123
< 31
< 27
< 67
< 49
< 72
< 42
< 56
< 55
< 30
< 38
< 188
< 44 Pasturage 06101/23
< 36
< 30
< 90
< 42
< 89
< 34
< 59
< 55
< 44
< 41
< 159
< 27 Pasturage 06115123
< 41
< 42
< 79
< 42
< 66
\\ < 37
< 58
< 52
< 39
< 38
< 134
< 40 Pasturage 06129123
< 31
< 33
< 72
< 37
< 66
< 29
< 51
< 52
< 34
< 34
< 138
< 38 Pasturage 07113123
< 26
< 25
< 55
< 25
< 56
< 25
< 41
< 50
< 23
< 21
< 121
< 39 Pasturage 07128123
< 21
< 21
< 43
< 22
< 49
< 18
< 36
< 32
< 26
< 19
< 94
< 27 Pasturage 08110/23
< 30
< 27
< 83
< 29
< 73
< 33
< 42
< 44
< 33
< 28
< 127
< 38 Pasturage 08124123
< 36
< 33
< 98
< 44
< 94
< 45
< 73
< 51
< 42
< 43
< 173
< 45 Pasturage 09/07/23
< 24
< 30
< 75
< 30
< 99
< 38
< 38
< 40
< 36
< 36
< 168
< 38 Pasturage 09121123
< 43
< 38
< 82
< 41
< 81
< 43
< 69
< 53
< 46
< 37
< 144
< 42 Pasturage 10104123
< 23
< 28
< 64
< 31
< 68
< 35
< 52
< 48
< 28
< 35
< 143
< 32 C')
Pasturage 10119123
< 25
< 28
< 58
< 26
< 64
< 35
< 47
< 40
< 29
< 24
< 104
< 31 I
~
Pasturage 11101123
< 33
< 27
< 61
< 36
< 74
< 29
< 48
< 46
< 29
< 30
< 126
< 45 N
Pasturage 12/06123
< 25
< 28
< 51
< 13
< 67
< 33
< 52
< 48
< 33
< 31
< 130
< 40 MEAN L-QUAD 1 Cabbage 07/27123
< 23
< 30
< 56
< 29
< 65
< 25
< 50
< 39
< 27
< 29
< 114
< 47 Potato 07127123
< 28
< 19
< 61
< 28
< 63
< 29
< 42
< 35
< 25
< 23
< 109
< 30 MEAN L-QUAD 2 Horseradish 07127123
< 28
< 28
< 56
< 35
< 64
< 32
< 50
< 46
< 34
< 37
< 110
< 50 Cabbage 07/27123
< 29
< 29
< 49
< 31
< 51
< 31
< 55
< 37
< 26
< 20
< 116
< 46 Brussels sprouts 07127123
< 24
< 26
< 47
< 26
< 62
< 24
< 42
< 40
< 30
< 29
< 110
< 39 MEAN L-QUAD 3 Turnip 07127123
< 18
< 15
< 37
< 18
< 40
< 17
< 23
< 32
< 17
< 17
< 75
< 20 Lettuce 07127123
< 30
< 26
< 62
< 33
< 68
< 34
< 55
< 47
< 33
< 34
< 133
< 43 MEAN L-QUAD4 Kohlrabi 07/27/23
< 16
< 22
< 49
< 20
< 42
< 21
< 41
< 35
< 16
< 20
< 86
< 30 Red beets 07/27/23
< 31
< 30
< 61
< 26
< 70
< 26
< 49
< 51
< 28
< 29
< 139
< 31 Red beet leaves 07127123
< 25
< 23
< 61
< 46
< 73
< 31
< 59
< 42
< 35
< 30
< 142
< 28 MEAN
Table C-Vll.2 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/KG WET+/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 L-VEG C Dandelion 05/18/23
< 36
< 40
< 79
< 40
< 103
< 37
< 59
< 51
< 42
< 41
< 169
< 56 Clover 05/18/23
< 50
< 40
< 80
< 46
< 74
< 35
< 60
< 56
< 42
< 41
< 174
< 49 Milkweed 06115/23
< 38
< 31
< 57
< 38
< 75
< 29
< 63
< 41
< 41
< 36
< 132
< 42 Clover 06115/23
< 28
< 24
< 60
< 35
< 73
< 27
< 41
< 30
< 30
< 28
< 99
< 37 Collard 07113123
< 28
< 24
< 65
< 33
< 70
< 29
< 36
< 37
< 27
< 22
< 116
< 39 Mustard green 07113123
< 34
< 39
< 94
< 45
< 101
< 33
< 63
< 53
< 37
< 39
< 169
< 30 Swiss chard 07/13/23
< 21
< 21
< 50
< 30
< 51
< 26
< 33
< 30
< 26
< 19
< 76
< 29 Birds-foot trefoil 07/20/23
< 10
< 11
< 28
< 12
< 25
< 11
< 21
< 30
< 11
< 11
< 74
< 18 Clover 07120/23
< 13
< 13
< 29
< 14
< 26
< 13
< 23
< 35
< 13
< 12
< 80
< 23 Radish 07/27/23
< 24
< 25
< 52
< 30
< 55
< 27
< 40
< 45
< 27
< 26
< 107
< 50 Radish leaves 07/27/23
< 18
< 17
< 37
< 15
< 33
< 16
< 27
< 24
< 17
< 17
< 71
< 26 Birds-foot trefoil 08/17123
< 20
< 18
< 45
< 22
< 48
< 20
< 32
< 27
< 21
< 21
< 86
< 24 Clover 08/17/23
< 31
< 33
< 66
< 32
< 63
< 34
< 56
< 50
< 33
< 34
< 144
< 43 Milkweed 08/17/23
< 32
< 27
< 71
< 41
< 80
< 39
< 53
< 48
< 29
< 30
< 164
< 42 Birds-foot trefoil 09/21/23
< 17
< 17
< 34
< 18
< 36
< 17
< 27
< 26
< 19
< 18
< 76
< 23 Clover 09/21/23
< 27
< 36
< 60
< 52
< 83
< 29
< 48
< 40
< 33
< 34
< 145
< 27 Grass 09/21/23
< 17
< 17
< 37
< 20
< 39
< 17
< 32
< 25
< 20
< 19
< 79
< 22 Dandelion 10/11/23
< 27
< 28
< 58
< 34
< 63
< 33
< 53
< 43
< 31
< 32
< 110
< 41 Grass 10/11/23
< 19
< 19
< 38
< 22
< 40
< 22
< 32
< 29
< 23
< 19
< 85
< 26 MEAN 0
L-ESE-1 I.....
Ct,)
Clover 05/18/23
< 21
< 20
< 40
< 28
< 45
< 22
< 39
< 33
< 26
< 22
< 99
< 27 Dandelion 05/18/23
< 24
< 24
< 48
< 29
< 51
< 24
< 44
< 38
< 26
< 26
< 109
< 30 Clover 06/15/23
< 21
< 25
< 68
< 30
< 72
< 41
< 45
< 44
< 38
< 34
< 107
< 32 Dandelion 06/15/23
< 35
< 37
< 71
< 43
< 74
< 35
< 62
< 50
< 38
< 38
< 148
< 41 Clover 07/20/23
< 11
< 12
< 28
< 12
< 25
< 11
< 18
< 28
< 12
< 11
< 66
< 20 Dandelion 07/20/23
< 17
< 19
< 41
< 18
< 42
< 20
< 32
< 52
< 19
< 19
< 118
< 28 Clover 08/17/23
< 22
< 27
< 50
< 28
< 50
< 28
< 41
< 39
< 30
< 25
< 107
< 36 Dandelion 08/17/23
< 29
< 29
< 64
< 33
< 79
< 29
< 55
< 39
< 39
< 28
< 132
< 42 Clover 09/21/23
< 30
< 31
< 64
< 41
< 72
< 40
< 61
< 46
< 39
< 34
< 137
< 36 Dandelion 09/21/23
< 35
< 36
< 79
< 26
< 89
< 43
< 49
< 48
< 37
< 37
< 156
< 56 Clover 10/11/23
< 18
< 17
< 39
< 19
< 43
< 18
< 32
< 30
< 19
< 19
< 85
< 21 Dandelion 10/11/23
< 30
< 27
< 62
< 41
< 72
< 28
< 40
< 44
< 30
< 30
< 127
< 39 MEAN L-ESE-2 Dandelion 05/18/23
< 41
< 42
< 84
< 39
< 94
< 44
< 82
< 49
< 50
< 45
< 153
< 50 Clover 05/18/23
< 27
< 29
< 65
< 43
< 89
< 32
< 68
< 54
< 38
< 35
< 167
< 45 Plantain 06/15/23
< 31
< 30
< 63
< 30
< 65
< 27
< 61
< 47
< 36
< 35
< 148
< 32 Clover 06/15/23
< 36
< 31
< 68
< 39
< 78
< 36
< 53
< 40
< 35
< 35
< 149
< 51 Milkweed 07/20/23
< 24
< 22
< 54
< 29
< 53
< 25
< 41
< 54
< 21
< 23
< 133
< 39 Clover 07/20/23
< 20
< 20
< 45
< 23
< 45
< 21
< 33
< 53
< 20
< 19
< 107
< 26 Velvetleaf 08/17/23
< 28
< 30
< 59
< 28
< 59
< 25
< 48
< 39
< 29
< 29
< 117
< 30 Grass 08/17/23
< 30
< 33
< 69
< 31
< 80
< 29
< 47
< 41
< 37
< 30
< 132
< 41 Dandelion 09/21/23
< 33
< 30
< 67
< 41
< 74
< 37
< 54
< 48
< 35
< 33
< 144
< 47 Dandelion 09/21/23
< 32
< 34
< 69
< 39
< 76
< 29
< 63
< 48
< 40
< 30
< 128
< 22 Grass 09/27/23
< 22
< 21
< 64
< 34
< 70
< 34
< 52
< 44
< 30
< 28
< 134
< 43 Clover 10/11/23
< 16
< 15
< 37
< 18
< 36
< 17
< 28
< 24
< 18
< 17
< 70
< 19 Dandelion 10/11/23
< 31
< 42
< 73
< 34
< 82
< 40
< 56
< 49
< 34
< 35
< 141
< 58 MEAN
Table C-Vlll.1 QUARTERLY DLR RESULTS FOR LASALLE COUNTY STATION, 2023 Location Ba+
2023 Normalized Net Dose, Annual BA+
Normalized Annual Location Qtrly MDDa MQx (mrem/std. Qtr.)
Baseline MDDA121 Annual Facility
- Baseline, BA(1)
Dose, MA
- Dose, Ba (mrem) (mrem) 1 I 2 I 3 I 4 (mrem)
(mrem/yr)
FA L-01 18.2 22.9 18.8 19.2 20.7 17.5 72.8 85.9 76.2 ND L-03 17.8 22.4 17.6 18.4 18.4 16.9 71.0 84.1 71.3 ND L-04 16.9 21.6 16.4 17.6 17.9 15.4 67.6 80.7 67.3 ND l -05 17.1 21.8 17.1 18.6 18.5 17.2 68.5 81.6 71.4 ND L-06 17.9 22.6 18.7 18.2 21.1 16.2 71.8 84.9 74.0 ND L-07 17.7 22.3 17.2 18.0 17.3 17.6 70.7 83.8 70.0 ND l -08 16.4 21.1 15.9 15.7 15.7 15.0 65.7 78.7 62.3 ND l-10 15.1 19.8 15.1 14.7 14.5 12.5 60.5 73.5 56.8 ND L-101 18.2 22.9 18.2 17.4 20.2 18.7 72.9 86.0 74.6 ND L-102 19.8 24.4 20.1 18.1 20.9 17.6 79.0 92.1 76.7 ND l-103 17.5 22.2 18.7 19.1 18.7 17.5 70.0 83.1 73.9 ND l-104 17.4 22.1 17.3 16.6 18.5 15.9 69.7 82.8 68.3 ND L-105 19.0 23.7 18.7 18.0 20.1 18.3 76.1 89.2 75.1 ND L-106 17.5 22.1 18.3 19.7 17.9 16.4 69.8 82.9 72.3 ND l -107 18.5 23.1 19.2 18.7 19.5 17.1 74.0 87.1 74.3 ND l-108 18.8 23.4 18.3 18.5 19.6 17.8 75.1 88.2 74.1 ND l-109 17.4 22.0 18.1 19.1 19.2 18.5 69.4 82.5 74.8 ND L-110 18.2 22.8 18.6 18.4 18.0 15.8 72.6 85.7 70.7 ND L-111 B 19.0 23.7 18.5 18.9 19.4 17.4 76.1 89.2 74.2 ND l -112 17.8 22.4 16.0 16.7 18.7 16.5 71.0 84.1 67.7 ND l-113A 19.3 24.0 19.6 18.9 21.1 20.2 77.2 90.3 79.8 ND l-114 18.2 22.9 19.5 18.6 18.9 16.6 73.0 86.0 73.6 ND l-115 17.5 22.1 17.2 15.9 16.5 16.3 69.9 83.0 65.8 ND L-116 17.1 21.7 16.7 18.9 18.0 16.3 68.4 81.5 69.8 ND L-11A 16.9 21.6 17.0 17.7 17.8 15.9 67.7 80.8 68.5 ND L-201 14.4 19.1 14.3 14.6 15.7 15,3 57.7 70.8 59.8 ND l-202 15.6 20.3 14.8 17.1 16.0 13.8 62.6 75.7 61.7 ND L-203 17.6 22.2 18.1 18.5 18.1 16.7 70.2 83.3 71.5 ND L-204 18.7 23.4 18.6 22.0 20.5 16.7 75.0 88.1 77.8 ND l-205A 18.3 23.0 17.7 19.7 17.4 17.6 73,3 86.4 72.4 ND L-205B 16.8 21.4 19.7 19.0 18.6 16.0 67.2 80.3 73.4 ND l-206 18.3 22.9 19.1 20.1 19.0 15.9 73.1 86.2 74.1 ND L-207 17.6 22.3 19.2 20.2 19.0 17.6 70.6 83.7 76.0 ND L-208 18.5 23.1 19.8 19.6 20.5 17.8 73.9 87.0 77.5 ND L-209 17.9 22.6 17.9 17.8 19.1 15.9 71.6 84.7 70.7 ND L-210 19.4 24.0 18.8 20,1 20.7 19.7 77.5 90.6 79.4 ND L-211 18.3 23.0 18.3 21.1 19.2 16.8 73,4 86.4 75.4 ND L-212 18.9 23.5 19.0 21.0 20.1 17.1 75.4 88.5 77.1 ND L-213 17.4 22.1 16.8 17.1 18.6 15.1 69.7 82.8 67.5 ND L-214 17.5 22.2 17.6 17.9 18.4 15.9 70.1 83.1 69.7 ND L-215 18.7 23.4 17.7 19.9 19.2 17.2 74.8 87.9 74.0 ND L-216 18.1 22.7 18.4 17.5 19.2 17.2 72.2 85.3 72,2 ND 111 Baseline background dose (BA): The estimated mean background radiation dose at each field monitoring location annually based on historical measurements. excluding any dose contribution from the monitored facility 121 Minimum differential dose (MOD Al: The smallest amount of facility relaled dose at each monitored location annually above the baseline background dose that can be reliably detected by an environmental dosimetry system C-14
FIGURE C-1 Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023 5
0 Q.
.J 14.0 12.0 10.0 8.0 6.0 4.0 2.0 L-21 (C) Illinois River at Seneca 0.0 +-------+-------i-----------1 01-27-05 16.0 14.0 12.0 10.0 05-20-11 09-09-17 12-31-23 L-40 Illinois River Downstream i3 8.0 Q.
6.0 4.0 2.0 0.0 +--------1--------t,--------1 01-27-05 05-20-11 09-09-17 12-31-23 C-15
FIGURE C-2 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023 L-21 Illinois River at Seneca 2000 1600 1200 0
CL 800 400 0
03-31-05 12-07-09 08-15-14 04-23-19 12-30-23 L-40 Illinois River Downstream 2000 1600 1200
.J
[>
CL 800 400 0
03-31-05 12-07-09 08-15-14 04-23-19 12-30-23 C-16
FIGURE C-3 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LSCS, 2005 - 2023
.E
~
c;,
w 0...
60.0 50.0 40.0
.E u
- 0. 30.0 c;,
~ 20.0 10.0 L-01 Nearsite No. 1 0.0 -------------------
01/06/05 60.0 50.0 40.0 30.0 20.0 10.0 10/06/09 07/06/14 04/05/19 01/03/24 L-03 Onsite No. 3 0.0 +-------+-----+--------+-----t 01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 C-17
FIGURE C-4 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LSCS, 2005 - 2023 60.0 50.0 e 4o.o 0 a. 30.0 I') :
o 20.0 10.0 L-05 Onsite No. 5 0.0 +-------+-----+-----'-+------i 01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 L-06 Nearsite No. 6 70.0 60.0 50.0 I')
~ 40.0 0 a.
I')
30.0 9
w C) 20.0 10.0 0.0 01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 C-18
FIGURE C-5 Air Particulate - Gross Beta - Station L-10 (C)
Collected in the Vicinity of LSCS, 2005 - 2023 60.0 50.0 e 4o.o
~ 30.0 M q
~ 20.0 10.0 L-10 (C) Streator 0.0 +----------------+-----
01/06/05 10/06/09 07/06114 04/05/19 01/03/24 C-19
FIGURE C-6 Air Particulate - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LSCS, 2005 - 2023 C')
.§ 0
C.
C')
9 w
0 -
60.0 50.0 40.0 30.0 20.0 10.0 0.0 07/07/05 60.0 50.0 e 4o.o
- , u
- c. 30.0 C')
9
~ 20.0 10.0 L-04 Rte. 170 02/20/10 10/06/14 05/22/19 01/05/24 L-07 Seneca 0.0 +------t------+------+--------4 07/07/05 02/20/10 10/06/14 05/22/19 01/05/24 C-20
FIGURE C-7 Air Particulate - Gross Beta - Stations L-08 and L-11 Collected in the Vicinity of LSCS, 2005 - 2023 M
..e u Q,
M c;,
w c:,
~
60.0 50.0 40.0 30.0 20.0 10.0 0.0 07/07/05 60.0 50.0 e 4o.o
~
- c. 30.0 M
c:, w 0
20.0
~
10.0 L-08 Marseilles 02/20/10 10/06/14 05/22/19 01/05/24 L-11 Ransom (1J 0.0 +--------+-------+---------<
07-07-05 01-14-09 07-24-12 02-01-16 (1) Air monitoring station L-11 was retired on 01121/16 C-21
FIGURE C-8 Air Particulate - Gross Beta - Station L-11 A Collected in the Vicinity of LSCS, 2016 - 2023 40.0 30.0 C')
E
~
c.. 20.0 C')
Ci' w
0 10.0 L-11 A Ransom <1J 0.0 +--------------+----------I 01/07/16 09/06/18 05/06/21 01/04/24 (1) Air monitoring station L-11A was placed in service on 01114/16 C-22
FIGURE C-1 Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023
- ! u Cl.
14.0 12.0 10.0 8.0 6.0 4.0 2.0 L-21 (C) Illinois River at Seneca 0.0 ------------------
01-27-05 05-20-11 09-09-17 12-31-23 L-40 Illinois River Downstream 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 01-27-05 05-20-11 09-09-17 12-31-23 C-15
FIGURE C-2 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2023 L-21 Illinois River at Seneca 2000 1600 1200 800 400 0+----------------------
03-31-05 12-07-09 08-15-14 04-23-19 12-30-23 L-40 Illinois River Downstream 2000 1600 1200
..J
~
- 0.
800 400 0+----------------------
03-31-05 12-07-09 08-15-14 04-23-19 12-30-23 NOTE: Any increases in tritium at the indicator location wre also observed at the control location. Therefore, a source upstream of LaSalle to the Illinois River is determined to be the cause of the elevated tritium results.
C-16
FIGURE C-3 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LSCS, 2005 - 2023 M
E
~
Cl.
M q w
c:,...
M E
~
Cl.
M q w
c:,...
60.0 50.0 40.0 30.0 20.0 10.0 0.0 01/06/05 60.0 50.0 40.0 30.0 20.0 10.0 L-01 Nearsite No. 1 10/06/09 07/06/14 04/05/19 01/03/24 L-03 Onsite No. 3 0.0 +-------- ------------~
01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 C-17
FIGURE C-4 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LSCS, 2005 - 2023 60.0 50.0
.., 40.0 1
0 a. 30.0 9
~ 20.0 10.0 L-05 Onsite No. 5 0.0 ----------------------
01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 L-06 Nearsite No. 6 70.0 60.0 50.0 1 40.0 0
Cl.
30.0 9
w Cl 20.0 10.0 0.0 01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 C-18
FIGURE C-5 Air Particulate - Gross Beta - Station L-1 0 (C)
Collected in the Vicinity of LSCS, 2005 - 2023 60.0 50.0 E 4o.o l3
- 0. 30.0 M
9
~ 20.0 10.0 L-10 (C) Streator 0.0 +------+------+------+--------4 01/06/05 10/06/09 07/06/14 04/05/19 01/03/24 C-19
FIGURE C-6 Air Particulate - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LSCS, 2005 - 2023 L-04 Rte. 170 60,0 50.0 M
40.0
.e u Cl. 30.0 M
9 w
20.0 C -
10.0 0.0 07/07/05 02/20/10 10/06/14 05/22/19 01/05/24 L-07 Seneca 60.0 50.0 M
40.0
~
0 30.0 Cl.
M 9
w 20.0 C -
10.0 0.0 07/07/05 02/20/10 10/06/14 05/22/19 01/05/24 C-20
FIGURE C-7 Air Particulate - Gross Beta - Stations L-08 and L-11 Collected in the Vicinity of LSCS, 2005 - 2023 E r,
- 0.
9 w
0...
60.0 50.0 40.0 30.0 20.0 10.0 0.0 07/07/05 60.0 50.0 40.0
-E u
- 0. 30.0 9
~ 20.0 10.0 L-08 Marseilles 02/20/10 10/06/14 05/22/19 01/05/24 L-11 Ransom (1J 0.0...... -------+------+---------4 07-07-05 01-14-09 07-24-12 02-01-16 (1) Air monitoring station L-11 was retired on 01121/16 C-21
FIGURE C-8 Air Particulate - Gross Beta - Station L-11 A Collected in the Vicinity of LSCS, 2016 - 2023 40.0 30.0 E
~
- a. 20.0 9
w 0
10.0 L-11 A Ransom <1J 0.0..,__ _____
---4-_____
~
01/07/16 09/06/18 05/06/21 01/04/24 (1) Air monitoring station L-11A was placed in seNice on 01/14116 C-22
APPENDIX D INTER-LABORATORY COMPARISON PROGRAM
Intentionally left blank
Analytics Environmental Radioactivity Cross Check Program Table D.1 Teled~ne Brown Engineering Environmental Services Identification TBE Known Ratio of TBE to Month/Year Number Matrix Nuclide Units Reported Value (al Analytics Result Evaluation lb)
Value March 2023 E13826 Milk Sr-89 pCi/L 70.5 93.1 0.76 w
Sr-90 pCi/L 12.3 14.7 0.84 A
E13827 Milk Ce-141 pCi/L 127 139 0.91 A
Co-58 pCi/L 119 131 0.91 A
Co-60 pCi/L 250 279 0.90 A
Cr-51 pCi/L 246 302 0.82 A
Cs-134 pCi/L 172 200 0.86 A
Cs-137 pCi/L 125 140 0.89 A
Fe-59 pCi/L 122 122 1.00 A
1-131 pCi/L 70.2 82.0 0.86 A
Mn-54 pCi/L 165 180 0.92 A
Zn-65 pCi/L 306 306 1.00 A
E13828 Charcoal 1-131 pCi 79.0 89.9 0.88 A
E13829 AP Ce-141 pCi 91.9 87.8 1.05 A
Co-58 pCi 87.5 82.5 1.06 A
Co-60 pCi 199 176 1.13 A
Cr-51 pCi 218 191 1.14 A
Cs-134 pCi 119 126 0.94 A
Cs-137 pCi 92.4 88.7 1.04 A
Fe-59 pCi 95.5 76.9 1.24 w
Mn-54 pCi 120 113 1.06 A
Zn-65 pCi 179 193 0.93 A
E13830 Soil Ce-141 pCi/g 0.224 0.220 1.02 A
Co-58 pCi/g 0.193 0.207 0.93 A
Co-60 pCi/g 0.406 0.441 0.92 A
Cr-51 pCi/g 0.464 0.477 0.97 A
Cs-134 pCi/g 0.334 0.316 1.06 A
Cs-137 pCi/g 0.270 0.288 0.94 A
Fe-59 pCi/g 0.183 0.193 0.95 A
Mn-54 pCi/g 0.263 0.284 0.93 A
Zn-65 pCi/g 0.475 0.484 0.98 A
E13831 AP Sr-89 pCi 99.4 90.8 1.09 A
Sr-90 pCi 14.6 14.3 1.02 A
(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:
A= Acceptable - reported result falls within ratio limits of0.80-1.20 W = Acceptable with warning - reported result falls within 0. 70-0. BO or 1. 20-1. 30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and> 1.30 D-1 (Page 1 of 2)
Analytics Environmental Radioactivity Cross Check Program Table D.1 Teled:tne Brown Engineering Environmental Services Identification TBE Known Ratio of TB E to Month/Year Number Matrix Nuclide Units Reported Value iaJ Analytics Result Evaluation (bl Value September 2023 E13832 Milk Sr-89 pCi/L 49.8 71.4 0.70 w
Sr-90 pCi/L 7.28 12.8 0.57 N(1l E13833 Milk Ce-141 pCi/L 93.4 104 0.90 A
Co-58 pCi/L 58.2 65.8 0.88 A
Co-60 pCi/L 190 223 0.85 A
Cr-51 pCi/L 207 205 1.01 A
Cs-134 pCi/L 96.0 114 0.84 A
Cs-137 pCi/L 121 141 0.86 A
Fe-59 pCi/L 78.8 78.8 1.00 A
1-131 pCi/L 27.9 37.4 0.75 w
Mn-54 pCi/L 128 146 0.88 A
Zn-65 pCi/L 185 203 0.91 A
E13834 Charcoal 1-131 pCi 76.9 78.7 0.98 A
E13835 AP Ce-141 pCi 91.9 87.1 1.05 A
Co-58 pCi 58.7 55.2 1.06 A
Co-60 pCi 200 187 1.07 A
Cr-51 pCi 192 172 1.12 A
Cs-134 pCi 89.6 96 0.94 A
Cs-137 pCi 109 119 0.92 A
Fe-59 pCi 68.3 66.1 1.03 A
Mn-54 pCi 129 123 1.05 A
Zn-65 pCi 163 171 0.96 A
E13836 Soil Ce-141 pCi/g 0.228 0.184 1.24 w
Co-58 pCi/g 0.103 0.116 0.89 A
Co-60 pCi/g 0.364 0.394 0.92 A
Cr-51 pCi/g 0.371 0.362 1.02 A
Cs-134 pCi/g 0.176 0.202 0.87 A
Cs-137 pCi/g 0.285 0.315 0.90 A
Fe-59 pCi/g 0.140 0.139 1.00 A
Mn-54 pCi/g 0.237 0.259 0.92 A
Zn-65 pCi/g 0.349 0.359 0.97 A
E13837 AP Sr-89 pCi 74.6 80.2 0.93 A
Sr-90 pCi 13.9 14.4 0.96 A
(a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:
A= Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning-reported result falls within 0. 70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and > 1.30 (1) See NCR 23-24 D-2 (Page 2 of 2)
DOE's Mixed Analyte Performance Evaluation Program (MAPEP)
Table 0.2 Teled~ne Brown EnsineerinS Environmental Services Identification TSE Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value Value (al Range February 2023 23-MaS48 Soil Ni-63 Sq/kg 294 1130 791 - 1469 N(3l 23-MaSU48 Urine Cs-134 Sq/L 9.92 10 6.7-12.4 A
Cs-137 Sq/L 0.0994 (1)
A Co-57 Sq/L 9.35 8.67 6.07 - 11.27 A
Co-60 Sq/L 9.03 8.13 5.69 - 10.57 A
Mn-54 Sq/L 11.80 10.0 7.0 - 13.0 A
U-234 Sq/L 0.01 Not spiked U-238 Sq/L 0.01 Not spiked Zn-65 Sq/L 10.60 9.29 6.50 - 12.08 A
23-MaW48 Water Ni-63 Sq/L 23.1 27.3 19.1 - 35.5 A
23-RdV48 Vegetation Cs-134 Sq/sample 5.6 7.6 5.32 - 9.88 w
Cs-137 Sq/sample 0.03 (1)
A Co-57 Sq/sample 5.9 6.9 4.85 - 9.01 A
Co-60 Sq/sample 5.00 6.51 4.56 - 8.46 w
Mn-54 Sq/sample 6.08 8.03 5.62 - 10.44 w
Sr-90 Sq/sample 0.05 (1)
Nl4I Zn-65 Sq/sample 5.49 7.43 5.20- 9.66 w
August2023 23-MaS49 Soil Fe-55 Sq/kg 346 1280 896 - 1664
- Ncs, Ni-63 Sq/kg 1260 1370 959 - 1781 A
23-MaW49 Water Ni-63 Sq/L 1.0 (2)
A 23-RdV49 Vegetation Cs-134 Sq/sample 3.860 4.98 3.49 - 6.47 w
Cs-137 Sq/sample 0.027 (1)
A Co-57 Sq/sample 3.88 4.24 2.97 - 5.51 A
Co-60 Sq/sample 2.37 2.79 1.95-3.63 A
Mn-54 Sq/sample 2.04 2.56 1.79-3.33 w
Sr-90 Sq/sample 0.96 1.17 0.82 -1.52 A
Zn-65 Sq/sample
-0.514 (1)
A (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOEJMAPEP evaluation:
A = Acceptable - reported result falls within ratio limits of 0. 80-1.20 W = Acceptable with warning-reported result falls within 0. 70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and> 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 23-08 (4) See NCR 23-09 (5) Initial evaluation - See CAR 23-31 0-3 (Page 1 of 1)
ERA Environmental Radioactivity Cross Check Program Table D.3 Teledyne Brown Engineering Environmental Services Month/Year Identification Nuclide Units TBE Reported Known Acceptance Evaluation !bl Number Matrix Value Value la)
Limits March 2023 MRAD-38 Water Am-241 pCi/L 28.1 32.1 22.0-41.0 A
Fe-55 pCi/L 1180 1380 811-2010 A
Pu-238 pCi/L 65.6 70.7 42.5 - 91.6 A
Pu-239 pCi/L 82.9 92.4 57.2 - 114 A
Soil Sr-90 pCi/kg 2630 2580 803 - 4020 A
AP GR-A pCi/filter 69.6 76.8 40.1 - 127 A
GR-B pCi/filter 36.8 32.8 19.9 - 49.6 A
April 2023 RAD-133 Water Ba-133 pCi/L 26.0 22,3 17.1 - 25.8 N111 Cs-134 pCi/L 72.1 77.6 63.4 - 85.4 A
Cs-137 pCi/L 62.1 63.1 56.8 - 72.2 A
Co-60 pCi/L 32.6 30.3 26.7-36.1 A
Zn-65 pCi/L 253 242 218 - 283 A
GR-A pCi/L 34.2 29.2 14.9 - 38.2 A
GR-B pCi/L 64.3 60.7 41.8-67.4 A
U-Nat pCi/L 61.75 62.7 51.2-69.0 A
H-3 pCi/L 13,300 12700 11,100 - 14,000 A
Sr-89 pCi/L 67.0 61.1 49.2 -69.0 A
Sr-90 pCi/L 36.5 36.0 26.4-41.5 A
1-131 pCi/L 24.3 28.7 23.9 - 33.6 A
September 2023 MRAD-39 Water Am-241 pCi/L 54.0 71.0 48.7 - 90.8 A
Fe-55 pCi/L 2430 2630 1550 - 3830 A
Pu-238 pCi/L 172 177 106 - 229 A
Pu-239 pCi/L 171 182 113 - 224 A
Soil Sr-90 pCi/kg 9580 6800 2120 - 10,600 A
AP GR-A pCi/filter 82.2 79.8 41.7-131 A
GR-B pCi/filter 54.3 42.6 25.8 - 64.4 A
October 2023 RAD-135 Water Ba-133 pCi/L 86.3 92.2 73.8-111 A
Cs-134 pCi/L 38.4 41.2 27.9 - 54.5 A
Cs-137 pCi/L 194 199 161 - 237 A
Co-60 pCi/L 49.5 47.8 33.8 - 61.8 A
Zn-65 pCi/L 59.7 57.0 23.7 - 90.3 A
GR-A pCi/L 53.2 70.6 54.0 - 87.2 N121 GR-8 pCi/L 46,9 42.2 30.5 - 53.9 A
U-Nat pCi/L 51.26 51.7 45,9-57.5 A
H-3 pCi/L 20,100 22,900 19,700 - 26,100 A
Sr-89 pCi/L 51.1 38.2 25.2 - 51.2 A
Sr-90 pCi/L 31.7 35.7 30.3-41.1 A
1-131 pCi/L 23.5 29.7 25.8 - 33.6 N<Ji (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.
(b) ERA evaluation:
A = Acceptable - Reporled value falls within the Acceptance Limits N = Not Acceptable - Reporled value falls outside of the Acceptance Limits (1) See NCR 23-10 (2) See NCR 23-20 (3) See NCR 23-21 D-4 (Page 1 of 1)
APPENDIX E ERRATA DATA
Intentionally left blank
There is no errata data for 2023.
E-1
Intentionally left blank
APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)
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Docket No:
50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2023 Prepared By Teledyne Brown Engineering Environmental Services Constellation.
LaSalle County Station Marseilles, IL 61341 May 2024
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Table Of Contents I. Summary and Conclusions......................................................................................... 1 II. Introduction................................................................................................................ 2 A. Objectives of the RGPP........................................................................................ 2 B. Implementation of the Objectives......................................................................... 2 C. Program Description............................................................................................. 3 D. Characteristics of Tritium (H-3)............................................................................. 3 Ill. Program Description.................................................................................................. 4 A. Sample Analysis.................................................................................................. 4 B. Data Interpretation.............................................................................................. 4 C. Background Analysis.......................................................................................... 5
- 1. Background Concentrations of Tritium........................................................... 5 IV. Results and Discussion............................................................................................. 7 A. Groundwater Results.......................................................................................... 7 B. Surface Water Results........................................................................................ 8 C. Drinking Water Well Survey................................................................................ 8 D. Summary of Results - Inter-laboratory Comparison Program............................... 8 E. Leaks, Spills, and Releases.................................................................................. 8 F. Trends.................................................................................................................. 8 G. Investigations....................................................................................................... 8 H. Actions Taken...................................................................................................... 8
Appendix A Tables Table A-1 Figures Figure A-1 Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 Appendices Location Designation LaSalle County Station Groundwater Monitoring Sample Point List, 2023 LaSalle County Station Map of Groundwater Monitoring Sampling Locations,2023 Data Tables Concentrations of Tritium, Strontium, Gross Alpha, and Gross Beta in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2023 Concentrations of Hard-to-Detects in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, LaSalle County Station, 2023 ii
I.
Summary and Conclusions In 2006, Constellation (formerly Exelon) instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of LaSalle County Station. This evaluation involved numerous station personnel and contractor support personnel. Following baseline sampling and subsequent recommendations, LaSalle's Radiological Groundwater Protection Program (RGPP) program now consists of the six surface water and twenty-seven groundwater well sampling locations. The results for LaSalle's RGPP sampling efforts in 2023 are included in this report.
This is the seventeenth in a series of annual reports on the status of the RGPP conducted at LaSalle County Station. This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2023. During that time period, 113 analyses were performed on 48 samples from 17 groundwater locations. The monitoring was conducted by station personnel.
In assessing all the data gathered for this report, it was concluded that the operation of LaSalle County Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at LaSalle County Station.
Strontium-89 (Sr-89) and strontium-90 (Sr-90) were not detected in any groundwater samples during 2023.
No gamma-emitting radionuclides attributable to licensed plant operations were detected in any of the groundwater or surface water samples.
In the case of tritium, Constellation specified that its laboratories achieve a lower limit of detection (LLD) 100 times lower than that required by federal regulation.
The United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) is 20,000 pCi/L.
Tritium levels were detected at concentrations greater than the LLD of 200 pCi/L in 19 of 44 groundwater samples analyzed. The tritium concentrations ranged from
<LLD to 3,940 +/- 463 pCi/L. The elevated tritium levels (>200 pCi/L) being observed in groundwater are associated with the U1 CY tank leak that occurred in the June/
July 2010 timeframe, as documented in the Station's 10 CFR 50.75(g) report.
Gross alpha analysis in the dissolved and suspended fractions was performed for 8 locations during 2023. Gross alpha (dissolved) was detected in 2 of 8 samples with a concentration range of 2.7 to 7.6 pCi/L. Gross alpha (suspended) was detected in 3 of 8 samples. The concentrations ranged from 2.5 to 10.4 pCi/L. The concentrations of gross alpha analysis are considered to be background and are not the result of plant effluents.
Hard-to-detect analyses Fe-55 and Ni-63 were performed on 8 of the groundwater sampling locations in accordance with the LaSalle RGPP and to aid in establishing background levels. No Fe-55 or Ni-63 was detected in any sample.
1
II.
Introduction The LaSalle County Station (LSCS), consisting of two boiling water reactors, each rated for 3,546 MWt, owned and operated by Constellation, is located in LaSalle County, Illinois. Unit 1 went critical on March 16, 1982. Unit 2 went critical on December 2, 1983. The site is located in northern Illinois, approximately 75 miles southwest of Chicago, Illinois.
This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2023.
A Objectives of the RGPP The long-term objectives of the RGPP are as follows:
- 1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.
- 2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.
- 3. Perform routine water sampling and radiological analysis of water from selected locations.
- 4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.
- 5. Regularly assess analytical results to identify adverse trends.
- 6. Take necessary corrective actions to protect groundwater resources.
B.
Implementation of the Objectives The objectives identified have been implemented at LaSalle County Station as discussed below:
- 1. Constellation and its consultant identified locations as described in the 2006 Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators.
- 2. The LaSalle County Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.
- 3. LaSalle County Station will continue to perform routine sampling and radiological analysis of water from selected locations.
- 4.
LaSalle County Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.
- 5.
LaSalle County Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.
2
C.
Program Description Sample Collection Sample locations can be found in Figure A-1, Appendix A.
Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Both groundwater and surface samples water are collected. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events.
Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.
Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.
D.
Characteristics of Tritium (H-3)
Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water."
The chemical properties of tritium are essentially those of ordinary hydrogen.
Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, eating food, breathing air, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.
Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-? and/or boron-10 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.
Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly.
3
Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.
Ill.
Program Description A.
Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the LaSalle County Station RGPP in 2023. Sample and analysis and frequency is based upon well location, assessed risk and site hydrogeology as described in the RGPP.
In order to achieve the stated objectives, the current program includes the following analyses:
- 1.
Concentrations of gamma emitters in groundwater
- 2.
Concentrations of strontium in groundwater
- 3.
Concentrations of tritium in groundwater
- 4. Concentrations of gross alpha (dissolved and suspended) in groundwater
- 5.
Concentrations of Am-241 in groundwater
- 6.
Concentrations of Cm-242 and Cm-243/244 in groundwater
- 7.
Concentrations of Pu-238 and Pu-239/240 in groundwater
- 8.
Concentrations of U-234, U-235 and U-238 in groundwater
- 9. Concentrations of Fe-55 in groundwater
- 10. Concentrations of Ni-63 in groundwater B.
Data Interpretation The radiological data collected prior to LaSalle County Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, LaSalle County Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:
1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.
- 2.
Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.
Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling 4
uncertainty and other factors. Constellation reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Constellation reports the TPU by following the result with plus or minus+/- the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.
Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.
C.
Background Analysis A pre-operational radiological environmental monitoring program (REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, precipitation, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled Environmental Radiological Monitoring for LaSalle County Nuclear Power Station, Commonwealth Edison Company, Annual Reports for the years 1979 and 1981. The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.
- 1.
Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.
Additional detail may be found by consulting references (CRA 2006).
- a.
Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.
A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons.
Levels of tritium in precipitation increased significantly during the 1950s and early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.
5
- b.
Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected worldwide from 1960 to 2006. RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons.
Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. LaSalle's 1979 or 1981 pre-operational REMP showed precipitation tritium concentrations >300 pCi/L. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above.
Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.
- c.
Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L. Illinois River H-3 results have shown >200 pCi/L, as evidenced in LaSalle's REMP program sample results. This is attributable to sources upstream as measured by the control location.
The USEPA RadNet surface water data typically has a reported Combined Standard Uncertainty' of 35 to 50 pCi/L. According to USEPA, this corresponds to a+/- 70 to 100 pCi/L 95% confidence bound on each given measurement. Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.
The radio-analytical laboratory is counting tritium results to a Constellation-specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 - 240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.
6
IV.
Results and Discussion A.
Groundwater Results Samples were collected from onsite wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.
Tritium Samples from 17 locations were analyzed for tritium activity. Tritium values ranged from <LLD to 3,940 pCi/L. The highest tritium activity was found at well TW-LS-118S. The well is located predominantly in clay till. Based on the hydrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply. Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit. (Table 8-1.1, Appendix B)
Strontium A total of 8 samples from 8 groundwater locations were analyzed for Sr-89 and Sr-90. The results were less than the required detection limit of 10 pCi/L for Sr-89 and less than the required detection limit of 1.0 pCi/L for Sr-90.
(Table B-1.1, Appendix B)
Gross Alpha (dissolved and suspended)
Gross alpha in the dissolved and suspended fractions were performed on groundwater samples in 2023. Gross alpha (dissolved) was detected in 2 of 8 samples affecting 2 of 8 groundwater locations analyzed. The concentrations ranged from 2.7 to 7.6 pCi/L. Gross alpha (suspended) was detected in 3 of 8 samples affecting 3 of 8 groundwater locations analyzed.
The concentrations ranged from 2.5 to 10.4 pCi/L.
The concentrations of gross alpha which are slightly above detectable levels are considered to be background and are not the result of plant effluents.
(Table B-1.1, Appendix B)
Gamma Emitters No gamma-emitting nuclides were detected in any of the samples analyzed in 2023. (Table 8-1.2, Appendix B)
Hard-To-Detect Hard-to-detect analyses Fe-55 and Ni-63 were performed on 8 of the groundwater sampling locations in accordance with the LaSalle RGPP and to aid in establishing background levels. These nuclides were not detected at concentrations greater than their respective detection limits.
(Table 8-1.3, Appendix B) 7
- 8.
Surface Water Results No surface water samples were collected in 2023.
C.
Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the LaSalle County Station. This survey concluded that no residents in the vicinity of the plant utilize the shallow water aquifer as a drinking water supply. Site hydrological studies of aquifer flow and permeation rates from the shallow aquifer to the deep aquifer concluded that there is no feasible dose receptor via a ground water pathway at LaSalle.
D.
Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.
E.
Leaks, Spills, and Releases There were no new leaks identified at LaSalle Station during the reporting period.
F.
Trends Analysis results from samples continue to be trended in order to assess impact to groundwater at LaSalle Station. There were no new leaks identified in the reporting period. Sample data from the plume arising from the historic 2010 U1 CY tank leak is being trended per the LaSalle RGPP. The plume had been dispersing with groundwater flow, and extraction wells have been installed to provide additional control of the plume migration (see Section H.3. below). Currently, no tritium has migrated offsite, and tritium migration offsite is not expected.
G.
Investigations No new investigations were carried out during the reporting period.
H.
Actions Taken
- 1. Compensatory Actions No compensatory actions were taken during the reporting period.
- 2. Installation of Monitoring Wells No new monitoring wells have been installed during the reporting period.
- 3. Actions to Recover/Reverse Plumes Two (2) extraction wells (RW-LS-1 00S and RW-LS-101 S) were installed to control the migration of the tritium plume near U1 CY tank. RW-LS-1 00S became operational in October 2012. RW-LS-101 S became operational in April 2014.
8
APPENDIX A LOCATION DESIGNATION
Intentionally left blank
TABLE A-1 LaSalle County Station Groundwater Monitoring Sample Point List, 2023 Site HP-2 HP-5 HP-7 HP-10 MW-LS-104S MW-LS-105S MW-LS-106S MW-LS-107S MW-LS-111S RW-LS-100S TW-LS-114S TW-LS-116S TW-LS-117S TW-LS-118S TW-LS-119S TW-LS-120S TW-LS-121S A-1 Site Type Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Extraction Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well
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APPENDIX B DATA TABLES
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TABLE B-1.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A,Disl Gr-A,susi HP-2 06/15/23
< 187 HP-5 06/15/23
< 194 HP-7 03/21/23
< 174 HP-7 06/15/23
< 187
< 9.3
< 0.8
< 1.8 2.5 +/- 1.2 HP-7 08/21/23
< 197 HP-7 10/17/23
< 180 HP-10 06/15/23
< 184 MW-LS-104S 03/21/23 458 +/- 130
< 8.6
< 0.9
< 2.2
< 1.2 MW-LS-104S 06/16/23 872 +/- 173 MW-LS-104S 08/21/23 653 +/- 160 MW-LS-104S 10/17/23 386 +/- 125 MW-LS-105S 03/21/23
< 179 MW-LS-105S 06/15/23
< 194
< 3.8
< 0.9 2.7 +/- 1.2 2.5 +/- 1.3 MW-LS-105S 08/21/23 251 +/- 131 MW-LS-105S 10/17/23
< 175 MW-LS-106S 06/14/23
< 194 MW-LS-107S 03/14/23
< 185 MW-LS-107S 06/16/23
< 188
< 8.1
< 0.9
< 4.8
< 1.0 MW-LS-107S 08/21/23
< 197 MW-LS-107S 10/17/23
< 196 MW-LS-111S 06/14/23
< 188 RW-LS-100S 03/14/23 664 +/- 149
< 9.3
< 0.9
< 1.4
< 0.7 RW-LS-100S 06/15/23 220 +/- 127 RW-LS-100S 08/22/23 2710 +/- 343 RW-LS-100S Recount 08/22/23 2680 +/- 340 RW-LS-100S Reanalysis 08/22/23 2470 +/- 319 RW-LS-100S 10/17/23 550 +/- 143 1W-LS-114S 03/21/23
< 173 TW-LS-114S 08/21/23
< 194 TW-LS-116S 03/14/23 3700 +/- 437
< 9.7
< 0.9
< 1.9
< 0.7 1W-LS-116S 06/16/23 2220 +/- 296 1W-LS-116S 08/21/23 2230 +/- 295 1W-LS-116S 10/17/23 2550 +/- 324 1W-LS-117S 03/21/23 180 +/- 116 1W-LS-117S 06/15/23
< 194
< 8.2
< 0.9 7.6 +/- 1.8
< 0.8 1W-LS-117S 08/21/23
< 195 TW-LS-117S 10/17/23
< 189 TW-LS-118S 03/14/23 3940 +/- 463 TW-LS-118S 08/21/23 1010 +/- 180 1W-LS-118S Recount 08/21/23 926 +/- 176 TW-LS-118S Reanalysis 08/21/23 1060 +/- 187 1W-LS-119S 06/16/23
< 188 1W-LS-120S 03/21/23
< 192 TW-LS-120S 06/16/23
< 196
< 7.7
< 0.8
< 1.1 10.4 +/- 3.0 TW-LS-120S 08/21/23
< 197 TW-LS-120S 10/17/23
< 194 1W-LS-121S 03/14/23
< 192 1W-LS-121S 08/21/23
< 197 B-1
TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 HP-2 06/15/23
< 15
< 12
< 2
< 2
<4
<2
< 3
< 2
< 3
< 9
< 2
< 2
< 15
< 5 HP-5 06/15/23
< 16
< 19
< 2
< 2
<4
< 2
<4
< 2
< 3
< 4
< 2
< 2
< 10
<4 HP-7 06/15/23
< 15
< 28
< 1
< 2
< 3
< 2
< 3
<2
< 3
< 9
< 1
< 1
< 15
< 5 HP-10 06/15/23
< 15
< 12
< 1
<2
<3
<2
< 3
< 2
< 3
<8
< 1
< 1
< 14
< 5 MW-LS-104S 03/21/23
< 20
< 41
<2
<2
<4
< 2
<4
< 2
<4
< 5
<2
<2
< 11
<4 MW-LS-105S 06/15/23
< 17
< 33
<2
<2
<4
< 2
<4
< 2
< 3
< 4
<2
<2
< 10
< 3 MW-LS-106S 06/14/23
< 14
< 13
< 1
< 1
< 3
< 2
<3
<2
< 3
< 3
<2
<2
< 9
< 3 MW-LS-107S 06/16/23
< 14
< 21
< 1
< 2
< 3
<2
< 3
< 2
< 3
< 8
< 2
< 1
< 15
< 5 MW-LS-111S 06/14/23
< 13
< 13
< 1
< 2
< 3
< 1
< 3
< 2
< 3
< 9
< 1
< 1
< 15
< 5 RW-LS-100S 03/14/23
< 11
< 10
< 1
< 1
< 3
< 1
< 2
< 1
< 2
<4
< 1
< 1
< 8
< 3 TW-LS-114S 03/21/23
< 13
< 26
<2
< 1
< 3
< 2
< 3
< 2
< 3
< 3
< 2
< 2
<8
< 3 TW-LS-116S 03/14/23
< 8
< 22
< 1
< 1
< 2
< 1
< 1
< 1
< 1
< 3
< 1
< 1
<6
< 2 TW-LS-117S 06/15/23
< 15
< 34
< 2
<2
<4
< 2
<3
< 2
< 3
< 3
<2
<2
< 8
< 3 CJ TW-LS-118S 03/14/23
< 17
< 32
< 2
< 2
<4
<2
<4
< 2
<4
< 6
<2
<2
< 13
< 5 I
N TW-LS-119S 06/16/23
< 10
< 9
< 1
< 1
< 2
<2
<2
< 1
< 2
< 5
< 1
< 1
<9
<3 TW-LS-120S 06/16/23
< 15
< 27
<2
< 2
< 3
< 2
< 3
< 2
< 3
< 3
< 2
< 2
<9
<3 TW-LS-121S 03/14/23
< 13
< 14
< 1
< 1
< 3
< 2
<3
< 2
< 3
< 5
< 1
< 1
< 11
<4 B-2
TABLE B-1.3 SITE HP-7 MW-LS-104S MW-LS-105S MW-LS-107S RW-LS-100S TW-LS-116S TW-LS-117S TW-LS-120S OJ I
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CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE GROUNDWATER PROTECTION PROGRAM, LASALLE COUNTY STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 06/15/23
< 83 03/21/23
< 156 06/15/23
< 51 06/16/23
< 142 03/14/23
< 143 03/14/23
< 99 06/15/23
< 68 06/16/23
< 127 B-3 Ni-63
< 4.7
< 4.9
< 4.5
< 4.1
< 4.7
< 4.9
< 4.3
< 4.6
Intentionally left blank