SVPLTR 24-0018, Annual Radiological Environmental Operating Report
| ML24135A077 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/31/2024 |
| From: | Constellation Energy Generation, Teledyne Brown Engineering Environmental Services |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML24135A080 | List: |
| References | |
| SVPLTR#24-0018 | |
| Download: ML24135A077 (1) | |
Text
Docket No:
50-010 50-237 50-249 DRESDEN NUCLEAR POWER STATION UNITS 1, 2 and 3 Annual Radiological Environmental Operating Report 1 January through 31 December 2023 Prepared By Teledyne Brown Engineering Environmental Services
~
=:' Constellation Dresden Nuclear Power Station Morris, IL 60450 May 2024
Intentionally left blank
Table Of Contents I. Summary and Conclusions........ :.............................,................................................... :..... 1 II. Introduction.. :......*.. :.......................... ;:.............................................................................. 2 A. Opjectives of.the REMP......,....................................... :.......................................... 2 B. Implementation of the Objectives...................................................,.................... 2 Ill. Program Description..................................................... *.................................................. 3.
A. Sample Collection...................,.........................,.. :...... :.:....................................... 3 B. Sample Analysis.................................................................................................. 4 C. Data Interpretation............ :.........'....................................,...................................... 4 D. Program Exceptions............................ *............. ;............... ;.............,..................... 6 E. Program Changes.......................................... ;.................................................... 6 IV. Results and Discussion............................................. ;..................................................... 7 A. Aquatic Environment.................................................................... :...................... 7
- 1. Surface Water........................................................................................... 7
- 2. Ground Water........................................................................,.................. 7
- 3. Fish............ :....... :....................................................................................... 8
- 4. Sediment....... *.................................................................. :......................... 8 B. Atmospheric Environmerit.................... *.***:******'*.....,............................................. 8
- 1. Airborne.............................................. ;............................ '........................... 8
- a. Air Particulates...................... :................................................ :....... 8
- b. Airborne Iodine............................................................................... 9
- 2. Terrestrial............................................................... :.................................. 9
- a. Milk................................................................................................. 9 b; Food Products..........................................,...................................... 9 C. Ambient Gamma R~diation............................................................................,.. 1 O D. Land Use Survey.................................................................................................. 1 O E. Errata Data.......................................................,................................................ 1 O F. Summary of Results - Inter-lab.oratory Comparison Program........................... 11
Appendix A Tables Table A-1 Appendix B Tables Table B-1 Table B-2 Figures Figure B-1 Figure B-2 Appendix C Tables Table C-1.1 Table C-1.2 Table C-1..3 Table C-11.1 Appendices Radiological Environmental Monitoring Report Summary (Meets requirements of NUREG 1302)
Radiological Environmental Monitoring Program Annual Summary for the Dresden Nuclear Power Station, 2023 Location Designation, Distance & Direction, and Sample Collection &
Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2023 Radiological Environmental M'onitoring Program - Summary of Sample Collection and Analytical Methods, Dresden Nuclear Power Station, 2023 Dresden Station Inner Ring OSLO Locations, Fish, Water, and Sediment Locations, 2023 Dresden Station Fixed Air Sampling and OSLO Sites, Outer Ring OSLO Locations, 2023 Data Tables and Figures Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 ii
Table C-I1.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Table C-II1.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023
- Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Dresden Nuclear Power Station,_ 2023
- table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Table C.;.V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023.
Table C-Vl.1 Concentrations of 1-1_31 in Air Iodine Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Table C-Vll.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Table C-Vlll.1 Quarterly-DLR Results for Dresden Nuclear Power 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 Surface Water - Gross Beta - Station D-52 (C) Collected in.the Vicinity Of DNPS, 2000 - 2023 Surface Water - <;3ross Beta - Station D-57 (C) Collected in the Vicinity of DNPS, 2006 - 2023 Surface Water - Gross Beta - Station D-21 Collected in the Vicinity of DNPS, 2000 - 2023 Surface Water - Tritium - Station D--52 (C) Collected in the Vicinity of DNPS, 2000 - 2023 Surface Water - Tritium - Station D-57 (C) Collected in the Vicinity of DNPS, 2006 - 2023 Surface Water - Tritium - Station D-21 Collected in the Vicinity of DNPS, 2007 - 2023 Ground Water - Tritium - Station D-22 Collected in the Vicinity of DNPS, 2000 - 2023 Ground Water - Tritium - Station D-35 Collected in the Vicinity of DNPS, 2000 - 2023 iii
Figure C-9 Figure C-10 Figure C-11 Figure C-12 Figure C-13 Figur~ C-14 Figure C-15 Figure C-16 Figure C-17 Ground Water - Tritium - Station D-39 Collected in the Vicinity of DNPS, 2023 Air Particulate - Gross Beta - Stations D-01 and D-02 Collected in the Vicinity of DNPS, 2000 - 2023 Air Particuiate - Gross Beta - Stations* D-03 and D-04. Collected in the Vicinity of DNPS, 2000 - 2023 Air Particulate - Gross Beta - Stations 0-07 and D-12 (C) Collected in the Vicinity of DNPS, 2000 - 2023 Air Particulate - Gross Beta - Stations D-45 and 0-53 Collected in the Vicinity of DNPS, 2000 - 2023 Air Particulate - Gross Beta - Stations D-08 and D-10 Collected in the Vicinity of DNPS, 2005 - 2023 Air Particulate - Gross Beta - Station D-14 Collected in the Vicinity of DNPS, 2005 - 2023 Air Particulate - Gross Beta - Stations D-55 and D-56 Collected in the Vicinity of DNPS, 2006 - 2023 Air Particulate - Gross Beta - Station O'-58 Collected in the Vicinity of DNPS, 2011 - 2023.
Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2023 Table D-2 DO E's Mixed Analyte Performance Evaluation Program (MAPEP)
Teledyne Brown Engineering, 2023 Table D-3 ERA Environmental 'Radioactivity Cross Check Program Teledyne Brown Engineering, 2023 Appendix E Errata Data Appendix F Annual Radiological Groundwater Protection Program Report (ARGPPR) iv
I.
Summary and Conclusions There were no regulatory effluent limit exceedances in 2023 and the resultant calculated dose to a member of the public for 2023 due to the uranium fuel cycle was 8.13 mRem, which is 32.5% of the regulatory limit of 25 mRem/year.
The annual organ dose from all effluent sources is 8.17 mRem/yr which is 10.9% of the 75 mRem/yr (Thyroid) limit. Additionally, the Annual Radiological Environmental Operating Report (AREOR) supported the effluent dose calculation and indicates that Units 1, 2, and 3 of the Dresden Nuclear Power Station did not result in any adverse environmental impact.
Surface water samples were analyzed for concentrations of gross beta, tritium and gamma emitting nuclides. Ground water samples were analyzed for concentrations of tritium (H-3) and gamma emitting nuclides. No anthropogenic gamma-emitting nuclides were detected. Gross beta and tritium activities detected were consistent with those detected in previous years.
Fish (commercially and recreationally important species), and 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. Gross beta results at the indicator locations were consistent with those at the control location. 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.
Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescent Dosimetry (OSLO). The relative comparison to control locations remains valid.
This report on the Radiological Environmental Monitoring Program conducted for the Dresden Nuclear Power Station (DNPS) of Constellation Energy covers the period 1 January 2023 through 31 December 2023. During that time period, 1,752 analyses were performed on 1,640 samples. In assessing all the data gathered for this report it was concluded that the operation of DNPS had no adverse radiological impact on the environment.
1
\\
II.
Introduction The Dresden Nuclear Power Station (DNPS), consisting of one retired reactor and two operating boiling water reactors owned and operated by Constellation Energy Corporation, is located in Grundy County, Illinois. Unit No. 1 went critical in 1960 and was retired in 1978. Unit No. 2 went critical on 16 June 1970. Unit No. 3 went critical on 02 November 1971. The site is located in Northern lllino*is, approximately 12 miles southwest of Joliet, Illinois at the confluence of the Des Plaines and Kankakee Rivers where they form the Illinois River.
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.
An assessment for the station's radioactive effluent monitoring results for the calendar year are published in the station's Annual Radioactive Effluent Release Report. This report evaluates the station's radioactive effluent monitoring results and radiation dose via the principle pathways ofexposure resulting from plant emissions of radioactivity. It includes the maximum noble gas gamma and beta air doses in the unrestricted area, an annual summary of meteorological conditions includi_ng wind speed, wind direction and atmospheric stability and the result of the 40CFR190 uraniurri fuel cycle dose analysis.
A.
Objective of the Radiological Environmental Monitoring Program (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 exposure pathways.
- 3.
Continuously monitoring those! media before and during Station operation to assess Station radiological effects (if any) on man and the environment.
2
Ill.
Program Description A.
Sample Collection Samples for the DNPS REMP were collected for Constellation by Microbac Laboratories (formerly Environmental Incorporated Midwest Laboratory).
This section describes the general collection methods used by Microbac to obtain environmental samples for the DNPS REMP in 2023. Sample locations and descriptions can be found in Appendix B, Table B-1 and Figures B-1 and B-2. The collection methods used by Microbac are listed in Table B-2.
Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water (SW), grourid water (GW), fish (Fl) and sediment (SS). Samples were collected from three surface water locations
- (D-21, D-52 and D-57) and composited for analysis. Control locations were D-52 and D-57. Samples were collected quarterly from three well water locations (D-22, D-35 and D-39). All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of largemouth bass, common carp and smallmouth buffalo were collected semiannually at two lo'cations, D.:.28 and D-46 (Control). Sediment samples composed of recently deposited substrate were collected at one location semiannually, D-27. Dredging samples are collected if dredging was performed within 1 mile of the plant.
No dredging was performed in 2023 so no samples were taken.
Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate and airborne iodine (AP/Al). Airborne iodine and particulate samples were collected at fourteen locations (D-01, D-02, D-03, D-04, D".07, D-08, D-10, D-12, D-14, D-45, D-53, D-55, D-56 and D-58). The control location was D-12. Airborne iodine and particulate samples were obtained at each location using a vacuum pump with charcoal and glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The air filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.
Terrestrial Environment When a milk sample is available within 5 km (3.1 miles) from the Site, samples are collected biweekly from the indicator location and a control location (10 to 30 km from the Site) from May to October and monthly November through April. No milk samples were collected in 2023.
Broad leaf vegetation samples were collected in lieu of milk.
3
No food products were collected in 2023. Currently there are no crops irrigated by water in which liquid plant wastes have been discharged.
Broad leaf vegetation samples were collected July through October at five locations (D-25, 0-39, D-42, D-43 and D-44). The control location Was D-25.
Various types of samples were collected and placed in new unused plastic bags and sent to the laboratory for analysis.
Ambient Gamma Radiation Each location consisted of two OSLO sets. The OSLO locations were placed on and around the DNPS site as follows:
An inner ring consisting of 16 locations (D-101, D-102, D-103, D-104, D-105; D-106, 0-107, D-108, D-109, D-110, D-111, D-112a, D-113, D-114, D-115 and D-116) at or near the site boundary.
An outer ring consisting of 16 locations (D-201, D-202, D-203, D-204, D-205, D-206, 0-207, D-208, D-209, 0-210, 0-211, 0-212, 0-213, Q.,.214, D-215 and D-216) approximat~ly 5 to 1 O km (3.1 to 6.2 miles) from the site.
Other locations consisting of OSLO sets at the 13 air sampler locations (D-01, D-02, 0-03, 0-04, D-07, 0-08, D-10, D-14, 0-45, 0-53, D-"55, 0-56 and D-58).
The balance of one location (D-12) represents the control area OSLO set.
The OSLDs were exchanged quarterly and sent to Landauer for analysis.
B.
Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the DNPS REMP in 2023. The analytical procedures used by the laboratory are listed in Appendix B 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 and surface water, air particulates, fish, sediment and vegetation.
- 3.
Concentrations of tritium in ground and surface water.
- 4.
Concentrations of 1-131 in air.
- 5.
Ambient gamma radiation levels at various site environs.
C.
Data Interpretation For the purpose of this report, Dresden Nuclear Power 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:
4
- 1.
Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) was 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 was intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity. All analyses were designed to achieve the required DNPS detection capabilities for environmental sample analysis.
The minimum detectable concentration (MDC) is calculated the same as the LLD 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. A MDC was reported in all cases where positive activity was not detected. Gamma spectroscopy results for each type of sample were grouped as follows:
For groundwater, surface water, and vegetation twelve nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.
For fish, sediment and air particulate eleven nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-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.
5
D.
Program Exceptions For 2023 the DNPS REMP had a sample recovery rate greater than 93.8%
(1,640 of 1,749 samples collected). No ODCM-required samples were missed in 2023. Sample anomalies are listed in the following table:
Table 0-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date AP/Al D-03 12/30/22 No power due to ground with transformer
- 12/29/23 AP/Al D-01 02/03/23 Gate frozen - two week sample collected
- 02/10/23 02/17/23 AP/Al D-02 03/10/23 No power due to tripped circuit breaker OSLO D-04 1st Qtr, 2023 Sample became separated from the set and was lost in the mail.
Each program exception was reviewed to understand the causes of the program exception. No sampling or maintenance errors were identified during the reporting period. 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.
6
IV.
Results and Discussion A.
Aquatic Environment
- 1.
Surface Water Samples were composited or taken weekly and composited for analysis at three locations (D-21, D-52 and D-57). Of these locations only D-21, located downstream, could be affected by Dresden's effluent releases.
The following analyses were performed:
Gross Beta Monthly composites from all locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). Gross Beta was detected in 36 of 36 samples. The values ranged from 3.6 to 14.6 pCi/L.
Concentrations detected were consistent with those detected in previous years. (Figures C-1, C-2 and C-3, Appendix C)
Tritium Quarterly composites from all locations were analyzed for tritium activity (Table C-1.2, Appendix C). Three samples at indicator station D-21 were positive for tritium with a concentration range of 271 - 442 pCi/L.
Four samples at control station D-57 were positive for tritium with concentrations ranging from 639 to 1,140 pCi/L. No samples from station D-52 were positive for tritium. Concentrations detected were consistent with those detected in previous years.
(Figures C-4, C-5 and C-6, Appendix C)
Gamma Spectrometry Monthly composites from all locations were analyzed for gamma-emitting nuclides. No nuclides were detected and all required LLDs were met. (Table C-1.3, Appendix C)
- 2.
Ground Water Quarterly grab samples were collected at locations D-22, D-35 and D-39. These locations could be affected by Dresden's effluent releases and by sources upstream on the Kankakee River. The following analyses were performed:
Tritium All were analyzed for tritium activity (Table C-11.1, Appendix C). Tritium was not detected in any sample. Results were consistent with those in previous years. (Figures C-7 & C-8, Appendix C) 7
Gamma Spectrometry All samples were analyzed for gamma-emitting nuclides.' No nuclides were detected and all required LLDs were met.
(Table C-I1.2, Appendix C) 3.. Fish Fish samples comprised of largemouth bass, common carp and smallmouth buffalo were collected at two locations (D-28 and D-46) semiannually. Location D-28 could be affected by Dresden's 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-II1.1, Appendix C). Only naturally-occurring nuclides (not shown on tables) were found at both locations.
No fission or activation products were detected.
- 4.
Sediment Aquatic sediment samples were collected at one location (D-27) semiannually. This downstream location could be affected by Dresden's
. effluent releases. The following analysis was performed on the collected samples:
Gamma Spectrometry Sediment samples from the location were analyzed for gamma-emitting nuclides (Table C-IV.1, Appendix C). No fission or activation products were detected.
B.
Atmospheric Environment
- 1. Airborne
- a. Air Particulates Continuous air particulate samples were collected from fourteen locations on a weekly basis. The fourteen locations were separated into four groups: On-site samplers (D-01, D-02 and D-03), Near-field samplers within 3.1 miles of the site (D-04, D-07, D-45, D-53, D-56 and D-58), Far-field samplers between 5 and 10 km (3.1 and 6.2 miles) from the site (D-08, D-10, D-14 and D-55) and the Control sampler between 10 and 30 km (6.2 and 18.6 miles) from the site (D-12). 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) 8
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 DNPS. _ The results from the On-Site locations ranged from 6. 73E-3 to 3.90E-2 pCi/m3 with a mean of 1.0BE-2 pCi/m3. The results from the Near-Field locations ranged from 6.28E-3 to 4.35E-2 pCi/m3 with a mean of 1.87E-2 pCi/m3. The results from the Far-Field locations ranged from 6.42E-3 to 3.21 E-2 pCi/m3 with a mean of 1.84E-2 pCi/m3.
The results from the Control location ranged from 9.19E-3 to
- 3. 72E-2 pCi/m3 with a mean of 1.89E-2 pCi/m3. Comparison of the 2023 air particulate data with previous year's data indicate no effects from the operation of DNPS. In addition, a comparison of the weekly mean values for 2023 indicate no notable differences among the four groups. (Figures C-8 through C-14, Appendix C)
Gamma Spectrometry Samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-V.3, Appendix C). Only {laturally-occurring nuclides (not shown on the tables) were found in these composite samples. No anthropogenic nuclides were detected and all required LLDs were met. These samples were consistent with historical quarterly results. All other nuclides were less than the MDC.
- b. Airborne Iodine Continuous air samples were collected from fourteen locations (D-01, D-02, D-03, D-04, D-07, D-08, D-10, D-12, D-14, D-45, D-53, D-55, D-56 and D-58) and analyzed weekly for 1-131. All results were less than the MDC for 1-131.
(Table C-Vl.1, Appendix C)
- 2.
Terrestrial
- a. Milk No Milk (M) samples were analyzed in 2023.
- b. Broad leaf Vegetation Broad leaf vegetation samples were collected at five locations (D-25, 0-39, D-42 D-43 and D-44) when available. The Control location is D-25 and the other 4 locations could be affected by Dresden's effluent releases. The following analysis was performed:
Gamma Spectrometry Samples from six locations were analyzed for gamma-emitting nuclides. No nuclides were detected and all required LLDs were met.
(Table C-Vlll.1, Appendix C) 9
C.
Ambient Gamma Radiation Forty-six OSLO locations were established around the site. Results of
- OSLO measurements are listed in Table C-IX.1, Appendix C.
Most OSLO measurements were below 24 mrem/quarter, with a range of 7.6 to 24,0 mrem/quarter. Per NRC Regulatory Guide 4.13 Rev. 2, an historic 5-year average is calculated for each location and then compared to the quarterly result for statistical significance. If the *result is not statistically significant (>3 stdev), the dose is deemed non:..detectable (ND).
D.
Land Use Survey E.
A Land Use Survey conducted on August 19, 2023, around the Dresden Nuclear Power Station (DNPS) was performed by Microbac for Constellation Energy comply with Section 12.6.2 of the Dresden Offsite Dose Calculation Manual (ODCM). The purpose of the survey was to document the nearest resident or industrial facility, milk producing animal, and livestock in each of the sixteen 22 1/2 degree sectors within 10 km (6.2 miles) around the site.
There were no changes required to the DNPS REMP as a result of this survey. The results are summarized as follows:
- Distance in Miles from the DNPS Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles A
N 1.5 1.4 8
NNE 0.8 C
NE 0.8 D
ENE 0.7 1.7 E
E 1.1 F
ESE 1.0 G
SE 0.6 H
SSE 0.5 J
s 0.5 K
SSW 3.3 L
SW 3.6*
11.4 M
WSW 5.5 N
w 3.5 0.5 p
WNW 3.2 0.5 Q
NW 2.2 0.5 R
NNW
'1.5 1.0 Errata Data There was no errata data in 2023.
10
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., Environmenta.I Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:
A.
Analytics Evaluation Criteria B..
C.
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.
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 USE PA, 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.
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 founcJ. at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.
For the TBE laboratory, 124 out of 131 analyses performed met the specified acceptance criteria. Eight analyses did not meet the specified acceptance criteria and were addressed through the TBE Corrective Action Program. A summary is found below:
11
- 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 res.ult (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 ~t 108%. There was no explanation for the failure. This is the first low biased. failure for Sr-90. milk. The last fail Lire (high) was in 2016. (NCR 23-24)
- 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 12
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.
13
Intentionally left blank
APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT
SUMMARY
Intentionally left blank
TABLE A-1 RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM ANNUAL
SUMMARY
FOR DRESDEN NUCLEAR POWER STATION, 2023
- NAME OF FACILITY:
DRESDEN DOCKET NUMBER:
50-010, 50-237 & 50-249 LOCATION OF FACILITY:
MORRIS IL REPORTING PERIOD:
2023 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WiTH HIGHEST ANNUAL MEAN (M)
NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN(M)
MEAN(M)
MEAN(M)
STATION#
NON ROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)
(F)
(F)
NAME REPORTED MEASUREMEN7)
PERFORMED PERFORMED (LLD)
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER GR-B 36 4
9.7 8
9.7 D-21 INDICATOR 0
(PCIILITER)
(12112)
(24/24)
(12112)
IL RIVER AT EJ&E BRIDGE 5.9-14.6 3.6-14.1 5.9- _14.6 1.4 MILES WNW OF SITE H-3 12 2000 349 985 985 D-57 CONTROL
- 0 (314)
(4/8)
(414)
KANKAKEE RIVER AT WILL ROAD (CONTROL) 271-1442 639-1140 639-1140 2.0 MILES SE OF SITE GAMMA 36 MN-54 15
<LLD
<LLD 0
C0-58 15
<LLD
<LLD 0
FE-59 30
<LLD
<LLD 0
CO-60 15
<LLD
<LLD 0
ZN-65 30
<LLD
<LLD 0
)>
NB-95 15
<LLD
~LW
- o.
I ZR-95 30
<LLD
<LLD 0
~
1-131
.. 15
<LLD
<LLD 0
CS-134 15
<LLD
<LLD 0
CS-137 18
<LLD
<LLD 0
BA-140 60
<LLD
<LLD 0
LA-140 15
<LLD
<LLD 0
/
GROUND WATER H-3 12
.2000 NA NA NA 0
(PCIIUTER)
GAMMA 12 MN-54 15 *
<LLD NA 0
C0-58 15
<LLD NA 0
FE-59 30
<LLD NA 0
C0-60 15
<LLD NA 0
ZN-65 30
<LLD NA 0
NB-95
. 15
<LLD NA 0
ZR-95 30
<LLD NA 0
1-131
.15
<LLD NA 0
CS-134 15
<LLD NA 0
CS-137 18
<LLD NA 0
BA-140 60
<LLD NA 0
LA-140 15
<LLD NA 0
(M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses
TABLE A-1 RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM ANNUAL
SUMMARY
FOR DRESDEN NUCLEAR POWER STATION, 2023 NAME OF FACILITY:
DRESDEN DOCKET NUMBER:
50-010, 50-237 & 50-249 LOCATION OF FACILITY:
MORRIS IL REPORTING PERIOD:
2023 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M)
NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)
MEAN(M)
MEAN(M)
STATION#
NON ROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)
(F)
{F)
NAME REPORTED MEASUREMENT)
PERFORMED PERFORMED (LLD)
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS FISH GAMMA 8
(PCIIKG WET)
MN-54 130
<LLD NA 0
CO-58 130
<LLD NA 0
FE-59 260
<LLD NA 0
CO-60 130
<LLD NA 0
ZN-65 260
<LLD NA 0
NB-95 NA
<LLD NA 0
ZR-95 NA
<LLD NA 0
CS-134 130
<LLD NA 0
CS-137 150
<LLD NA 0
BA-140 NA
<LLD NA 0
LA-140 NA
<LLD NA 0
SEDIMENT GAMMA 2
(PCIIKG DRY)
MN-54 NA
<LLD NA 0
)>
CO-58 NA
<LLD NA 0
I I',,)
FE-59 NA
<LLD NA 0
CO-60 NA
<LLD NA 0
ZN-65 NA
<LLD NA 0
NB-95 NA
<LLD NA 0
ZR-95 NA
<LLD NA 0
CS-134 150
<LLD NA 0
CS-137 180
<LLD NA 0
BA-140 NA
<LLD NA 0
LA-140 NA
<LLD NA 0
AIR PARTICULATE GR-8 674 10 18.6 18.9 19.5 D-02 INDICATOR 0
(E-3 PCIICU.M)
(620/622)
(52/52)
(51/51)
ONSITE2 6-44 9-37 8-39 0.3 MILES NNE OF SITE GAMMA 52 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
CS-134 50
<LLD
<LLD 0
CS-137 60
<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. (F) Fraction of detectable measurement are indicated in parentheses
TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL
SUMMARY
FOR DRESDEN NUCLEAR POWER ST A TION; 2023 NAME OF FACILITY:
DRESDEN DOCKET NUMBER:
50-010, 50-237 & 50-249 LOCATION OF FACILITY:
MORRIS IL REPORTING PERIOD:
2023 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M)
NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN(M)
MEAN(M)
MEAN(M)
STATION#
NON ROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (F)
(F)
(F)
NAME REPORTED MEASUREMENT)
PERFORMED PERFORMED (LLD)
RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR IODINE GAMMA 674 (E-3 PCIICU.M) 1-131 70
<LLD
<LLD 0
VEGETATION GAMMA 51 *
(PCl!KG 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
l-131 60
<LLD
<LLD*
0 CS-134 60
<LLD
<LLD 0
)>
CS-137 80
<LLD
<LLD 0
I BA-140 NA
<LLD
<LLD 0
(IJ LA-140 NA
<LLD
<LLD 0
DIRECT RADIATION OSLD-QUARTERL Y 183 NA 15.4 14.3 19.6 D-116 INDICATOR 0
(MILL/-ROENTGENIQTR.)
(179/179)
(4/4)
(4/4) 7.6-24.0 11.5 -17.3 17.8-21.3 1.0 MILES NNW (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses
Intentionally left blank
APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION AND SAMPLE COLLECTION & ANALYTICAL METHODS
Intentionally left blank
TABLE B-1:
Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2023 Location Location Description A.
Surface Water D-21 D-52 D-57 Illinois River at EJ&E Bridge (indicator)
DesPlaines River at Will Road, Upstream (control)
Kankakee River at Will Road (control)
B.
Ground/Well Water D-35 D-39 Dresden Lock & Dam Morris, IL (indicator) 3985 Will Rd., Coal City, IL (indicator)
C.
Air Particulates/ Air Iodine D-01 D-02 D-03 D-04 D-07 D-08 D-10 D-12 D-14 D-45 D-53 D-55 D-56 D-58 D.
Fish D-28 D-46 E.
Sediment D-27 Onsite Station 1 (indicator)
Onsite Station 2 (indicator)
Onsite Station 3 (indicator)
Collins Road, on Station property(indicator)
Clay Products, Dresden Road (indicator)
Jugtown Road, Prairie Parks (indicator)
Goose Lake Road, Goose Lake Village (indicator)
Quarry Road, Lisbon (control)
Center Street, Channahon (indicator)
McKinley Woods Road, Channahon (indicator)
Will Road, Hollyhock (indicator)
Ridge Road, Minooka (indicator)
Will Road, Wildfeather (indicator)
Will Road, Marina (indicator)
Dresden Pool of Illinois River, Downstream (indicator)
DesPlaines River, Upstream (control)
Illinois River at Dresden Lock and Dam, Downstream (indicator)
F.
Broad leaf Vegetation D-25 D-39 D-42 D-43 D-44 Vince Biros Farm, Reed Road (control) 3985 Will Rd., Coal City, IL (indicator)
Dresden Site Garden 25158 W Elm St 9980 Ridge Road B-1 Distance & Direction from Site 1.4 miles WNW 1.1 miles ESE 2.0 miles SE 0.8 miles NW 3.2 miles SSE 0.8 miles NW 0.3 miles NNE 0.4 miles S 0.8 milesW 2.6 miles S 3.8 miles SW 3.5 miles SSW 10.5 miles NW 3.7 miles NE 1.7 miles ENE 2.1 miles SSE 4.3 miles N 1.7 miles SE 1.1 miles ESE 0.9 miles NNW 1.2 miles ESE 0.8 miles NW 11.3 miles SW 3.2 miles SSE 0.4 miles N 3.3 miles NE 3.0 miles N
TABLE 8-1:
Location Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2023 Location Description Distance & Direction from Site G.
Environmental Dosimetry - OSLO Inner Ring D-101 D-102 D-103 D-104 D-105 D-106 D-107 D-108 D-109 D-110 D-111 D-112 D-113 D-114 D-115 D-116 Outer Ring D-201 D-202 D-203 D-204 D-205 D-206 D-207 D-208 D-209 D-210 D-211 D-212 D-213 D-214 D-215 D-216 Other Locations D-01 D-02 D-03 D-04 D-07 D-08 D-10 D-14 D-45 D-53 D-55 D-56 D-58 Control D-12 Onsite 1 Onsite 2 Onsite 3 Collins Road, on Station property Clay Products, Dresden Road Jugtown Road, Prairie Parks Goose Lake Road, Goose Lake Village Center Street, Channahon McKinley Woods Road, Channahon Will Road, Hollyhock Ridge Road, Minooka Will Road, Wildfeather Will Road, Marina Lisbon B-2 1.0 miles N 1.4 miles NNE 1.2 miles NE
- 1. 7 miles ENE 1.5 miles E 1.1 miles ESE 1.4 miles SE 1.9 miles SSE 0.8 miles S 0.9 miles SSW 0.6 miles SW
- 0. 7 miles WSW 0.9 milesW 0.9 miles WNW 0.8 miles NW 1.0 miles NNW 4.8 miles N 5.1 miles NNE 4.7 miles NE 5.1 miles ENE 4.0 miles E 3.5 miles ESE 4.2 miles SE 4.9 miles SSE 4.1 miles S 4.9 miles SSW 4.8 miles SW 6.0 miles WSW 4.6 milesW 5.0 miles WNW 4.8 miles NW 4.9 miles NNW 0.8 miles NW 0.3 miles NNE 0.4 miles S 0.8 miles W 2.6 miles S 3.8 miles SW 3.5 miles SSW 3.7 miles NE 1.7 miles ENE 2.1 miles SSE 4.3 miles N 1.7 miles SE 1.1 miles ESE 10.5 miles NW
TABLE B-2:
Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Dresden Nuclear Power Station, 2023 Sample Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Medium EIML-SPM-1, Microbac Laboratory Sampling Monthly composite Procedures Manual TBE, TBE-2007 Gamma-Emitting Surface Water Gamma Spectroscopy sample or monthly TBE, TBE-2023 Compositing of samples 2 gallon Radioisotope Analysis composite from weekly grab samples EIML-COMP-01 procedure for compositing water and milk samples EIML-SPM-1, Microbac Laboratory Sampling Monthly composite Procedures Manual TBE, TBE-2008 Gross Alpha and/or Surface Water Gross Beta sample or monthly TBE, TBE-2023 Compositing of samples 2 gallon Gross Beta Activity in Various Matrices composite from weekly grab samples EIML-COMP-01 procedure for compositing water and milk samples CJ I (,l EIML-SPM-1, Microbac Laboratory Sampling Quarterly composite of Procedures Manual TBE, TBE-2011 Tritium Analysis in Surface Water Tritium monthly composite TBE, TBE-2023 Compositing of samples 500 ml Drinking Water by Liquid Scintillation samples EIML-COMP-01 procedure for compositing water and milk samples Ground Water Gamma Spectroscopy Quarterly grab samples EIML-SPM-1, Microbac Laboratory Sampling 2 gallon TBE, TBE-2007 Gamma-Emitting Procedures Manual Radioisotope Analysis Ground Water Tritium Quarterly grab samples EIML-SPM-1, Microbac Laboratory Sampling 500 ml TBE, TBE-2011 Tritium Analysis in Procedures Manual Drinking Water by Liquid Scintillation Samples collected twice Fish Gamma Spectroscopy annually via EIML-SPM-1, Microbac Laboratory Sampling 1000 grams (wet)
TBE, TBE-2007 Gamma-Emitting electroshocking or other Procedures Manual Radioisotope Analysis techniques Semi-annual grab EIML-SPM-1, Microbac Laboratory Sampling TBE, TBE-2007 Gamma-Emitting Sediment Gamma Spectroscopy samples Procedures Manual 500 grams (dry)
Radioisotope Analysis
TABLE B-2:
Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Dresden Nuclear Power Station, 2023 Sample Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Medium Annual grab samples if dredging occurred EIML-SPM-1, Microbac Laboratory Sampling TBE, TBE-2007 Gamma-Emitting Dredging Spoils Gamma Spectroscopy within 1 mile of Dresden Procedures Manual 500 grams (dry)
Radioisotope Analysis Station during the year.
One-week of continuous EIML-SPM-1, Microbac Laboratory Sampling 1 filter (approximately TBE, TBE-2008 Gross Alpha and/or Air Particulates Gross Beta air sampling through 280 cubic meters Gross Beta Activity in Various Matrices glass fiber filter paper Procedures Manual weekly)
TBE, TBE-2023 Compositing of samples Air Particulates Gamma Spectroscopy Quarterly composite of Env. Inc., AP-03 Procedure for compositing air 13 filters TBE, TBE-2007 Gamma-Emitting each station particulate filters for gamma spectroscopic Radioisotope Analysis analysis One-or two-week 1 filter (approximately Air Iodine Gamma Spectroscopy composite of continuous EIML-SPM-1, Microbac Laboratory Sampling 280 cubic meters TBE, TBE-2007 Gamma-Emitting air sampling through Procedures Manual weekly)
Radioisotope Analysis charcoal filter Broad leaf Grab samples July EIML-SPM-1, Microbac Laboratory Sampling TBE, TBE-2007 Gamma-Emitting Vegetation Gamma Spectroscopy 1000 grams (in lieu of milk) through October; Procedures Manual Radioisotope Analysis Optically Stimulated Quarterly OSLDs OSLO Luminescence comprised of two EIML-SPM-1, Microbac Laboratory Sampling 2 dosimeters at each Landauer Incorporated Al2O3:C Landauer Procedures Manual location Dosimetry Incorporated elements.
0
~
D-114 D-01 9 D-113 0 DRESDEN SITE 9 D-04 D-112 D-111 0-110 D-109 D-lOB 0
Figure B-1 Dresden Station Inner Ring OSLO Locations, Fish, Water, and Sediment Location, 2023 B-5
ft D-12 19
@)
47
,a 29 D-212 9
D-215 D-214
====~==© D-213 9
D-10 D-21 1 D-210 Figure 8-2 9
D-07 18 D-45 D-105 D-58 f1 0-56
,~
D-53 D-209 Dresden Station Fixed Air Sampling and OSLO Sites, Outer Ring OSLO Locations, 2023 8-6 0-203 iii D-206 D-207 D-208 Mill 0-204 D-205
APPENDIX C DATA TABLES AND FIGURES
Intentionally left blank
Table C-I.1 Table C-1.2 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD D-21 D-52 Da57 12/30/22 * - 01/27/23 11.8 +/- 2.6 11.9 +/- 2.6 5.7 +/- 2.0 01 /27 /23 - 02/24/23 7.4 +/- 2.7 10.1 +/- 3.0 6.7 +/- 2.4 02/24/23 C 03/31/23 9.2 +/- 2.7 9.1 +/- 2.7 6.3 +/- 2.2 03/31 /23 -,04/29/23 7.5 +/- 2.5 13.3 +/- 2.9 3.6 +/- 2.0 04/29/23 - 05/27 /23 14.6 +/- 3.1 9.6 +/- 2.7 5.0 +/- 2.2 05/27 /23 - 06/30/23 13.5 +/- 3.3
- 14.0 +/- 3.5 7.8 +/- 2.8 06/30/23 - 07 /28/23 7.7 +/- 2.3 7.0 +/- 2.2 8.0 +/- 2.3 07 /28/23 - 08/25/23 7.4 +/- 2.3 6.5 +/- 3.8 4.5 +/- 2.1 09/29/23 - 09/29/23 13.1+/-2.7 9.8 +/- 2.4 5.6 +/- 2.2 09/30/23 - 10/27 /23 7.9 +/- 2.3 9.4 +/- 2.4 5.3 +/- 2.1 10/27 /23 - 11/24/23 10.3 +/- 2.8 4.9 +/- 2.3 14.1 +/- 3.1 11 /24/23 - 12/29/23 5.9 +/- 2.2 9.5 +/- 2.5 3.9 +/- 2.0 MEAN +/- 2 STD DEV 9.7 +/- 5.8 9.6 +/- 5.3 6.4 +/- 5.6 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023.
RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD D-21 D-52 01/06/23 -
03/31/23 271 +/- 119
< 179 04/07/23 a 06/30/23 334 +/- 135
< 196 07/07/23 -
09/29/23
< 198
< 194 10/06/23 -
12/29/23 442 +/- 134
< 193 MEAN+/- 2 STD DEV 349 +/- 173 D-57 1060 +/- 178 1140 +/- 196 639 +/- 152 11,00 +/- 188 985 +/- 466 THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-1
Table C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEARPOWER STATION, 2023 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn°65 Nba95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 D-21 02/24/23 - 03/31/23
<4
< 6
< 5
< 6
< 10
< 6
< 10
< 7
< 6
< 6
< 23
< 8 03/31/23 -
04/29/23
< 5
< 5
< 9
< 5
< 11
<4
< 8
< 6
< 6
< 5
< 20
< 7 04/29/23 -
05/27/23
< 7
< 6
. < 14
< 9
< 11
< 6
< 11
< 11
< 5
- < 7
< 26.
< 9 05/27/23 -
06/30/23
< 5
< 6
< 10
< 7
< 10
< 6
< 9
< *12
< 5
< 6
< _26
< 8 06/30/23 07/28/23
< 6
< 5
< 9
< 5
< 12
< 6
< 9
< 9
< 5
< 4
< 24
< 5 07/28/23 -
08/25/23
< 7
< 8
< 11
< 8
< 15
< 8
< 13
< 14
< 8
< 8
< 33 *
< 10 08/25/23 09/30/23
< 6
< 7
< 16
< 7
< 17
< 7
< 13
< 10
< 8
< 7
< 28
< 9 09/30/23. -
10/27/23
< 6
< 7
< 14
< 7
< 14
< 8
< 12
< 10
< 8
< 7
< 26
< 7 10/27/23 -
11/24/23
< 5
< 5
< 10
< 7
< 13
< 5
< 10
.< 9
< 5
< 5
< 22
< 8 11/24/23 -
12/29/23
< 6
< 5
< 10
< 6
< 9
< 7
< 10
< 9
< 7
< 6
< 28
< 11 12/30/22 -
01/27/23
< 5.
< 5
<_9
< 5
< 11
< 5
< 9
< 7
< 5
< 5
< 20
< 5 01/27/23 02/24/23
< 7
< 6
< 16
< 8
< 15
< 7
< 11
<9
< 6
< 7
< 20
< 10 MEAN D-52 03/03/23 -
03/31/23
< 5
< 6
- < 15
< 6
< 15
< 5
< 12
< 8
< 8
< 8
< 27
< 10
(")
04/07/23 -
04/29/23
< 5
< 5
. < 8
< 6
< 10
<4
< 8
< 8
< 5
< 6
< 25
< 7 I
05/06/23 -
05/27/23
< 5.
< 5
< 13
< 7
< 13
< 5
< 11
< 8
< 8
< 6
< 21
< 9 N
06/02/23 -
06/30/23
< 5
< 5
< 10
< 7
< 13
< 6
< 11
< 9
< 6
< 6
< 36
< 10 07/07/23 -
07/28/23
<4
< 5
< 13
< 5
< 9
< 5
< 9
< 6
< 5
< 6..
< 23
< 9 08/04/23 -
08/25/23
< 5
<4
< 9
< 6
< 9
< 4
< 8
< 7
< 5
< 4
< 20
< 7 09/01/23 -
09/30/23
< 7
< 6
< 16
< 7
< 11
< 8
< 13
< 11
< 8
< 7
< 30
< 10 10/06/23 -
10/27/23
.< 6
< 7
< 14
< 5
- < 16
<7
< 10
< 8
< 6
< 7
< 23
< 6 11/03/23 11/24/23
< 6
< 7
< 11
< 6
< 10
< 7
< 12
"< 9
< 7
< 7
< 24
< 12 12/01/23 12/29/23
< 7
< 7
< 16
< 8
< 15
< 7
< 12
< 11
< 8
< 8
< 36
< 12 01/06/23
- 01/27/23
<4
< 4
< 8
< 5
< 9
< 5
< 7.
< 6
< 5
< 5
< 22
< 7 02/10/23 -
02/24/23
< 6
< 8
< 11
< 5
< 10
< 8
< 10
< 9
< 9
< 8
< 34
< 9 MEAN D-57 03/31/23 -
03/31/23
< 5
< 6
< 13
< 7
< 15
< 7
< 12
< 10
< 7
< 7
< 28
< 10 04/29/23 -
04/29/23
<4
< 4
< 9
< 6
< 9
<4
< 8
< 6
<4
< 4
< 14
< 6 05/27/23 -
05/27/23
< 5
< 5
< 10
< 7
< 12
< 7
< 9
< 8
< 5
< 6
< 21
< 5 06/30/23 06/30/23
< 5
. < 5
< 10
< 7
< 12
< 5
< 9
< 12
< 7
< 6
< 28
< 11 07/28/23 07/28/23
< 4
< 5
< 9
< 6
< 12
< 5
< 8
< 7
< 6
'<. 5
< -23
< 7 08/25/23 -
08/25/23
< 8
< 6
< 14
< 6
< 15
< 6
< 11.
< 8
<-7
< 7.
< 30
< 9 09/29/23 -
09/29/23
< 6
< 5
< 12 *
< 8
< 14
< 7
< 9
< 9
< 6
< 5
< 30
< 10 10/27/23 -
10/27/23
< 7
<.7
< 14
< 8
< 12
< 6
< 14
< 10
< 7
< 8
< 34.
< 10 1.1/24/23 -
11/24/23
< 6
< 6
< 9
< 5
< 14
< 7
< 12
< 9
< 7'
< 5
< 23
< 8 12/29/23 -
12/29/23
< 4
< 6
< 14
< 8
< 17
< 7
< 13
< 11
< 8
< 8
< 33
< 10 01/27/23 -
01/27/23
< 4
< 5
< 10
<* 4
< 9
< 4
< 7
< 7
< 5
< 4
< 19
< 8
- 02/24/23 -
02/24/23
< 6
< 5
< 11
< 7
< 11
< 4
< 12
< 9
< 9
< 6
< 29
< 10 MEAN
Table C-I1.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD D-22 D-35 D-;39 01/13/23 - 01/13/23
< 185
< 175
< 180 04/14/23 - 04/14/23
< 165
< 183
< 173 07/14/23 - 07/14/23
< 191
< 193
< 189 10/13/23 - 10/13/23
< 177
< 173
< 176 MEAN C-3
Tables C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 D-22 01/13/23 - 01/13/23
< 7
< 7
< 14
< 6
< 14
< 7
< 11
< 12
< 7
< 7
< 30
< 13 04/14/23 - 04/14/23
< 8
< 5
< 14
< 10
< 12
< 6
< 10
< 11
< 7
< 7
< 32
< 12 07/14/23 - 07/14/23
< 6
< 6
< 11
< 9
< 19
< 8
< 8
< 13
< 9
< 8
< 35
< 14 10/13/23 - 10/13/23
< 8
< 8
< 17
< 8
< 19
< 8
< 17
< 10
< 10
< 8
< 37
< 10 MEAN D-35 01/13/23 - 01/13/23
< 7
< 6
< 13
< 6
< 12
< 8
< 12
< 10
< 8
< 7
< 31
< 8 04/14/23 - 04/14/23
< 8
< 7
< 16
< 7
< 18
< 8
< 11
< 10
< 7
< 6
< 30
< 12 07/14/23 - 07/14/23
< 8
< 6
< 13
< 11
< 13
< 7
< 13
< 10
< 8
< 8
< 25
< 12 10/13/23 - 10/13/23
< 8
< 9
< 13
< 9
< 14
< 11
< 16
< 12
< 10
< 8
< 41
< 13 MEAN C')
I
~
D-39 01/13/23 - 01/13/23
< 7
< 7
< 14
< 6
< 9
< 7
< 11
< 11
< 8
< 7
< 27
< 10 04/14/23 - 04/14/23
< 7
< 8
< 15
< 7
< 11
< 8
< 13
< 13
< 9
< 6
< 34
< 10 07/14/23 - 07/14/23
< 7
< 7
< 15
< 9
< 13
< 7
< 13
< 12
< 7
< 7
< 33
< 6 10/13/23 - 10/13/23
< 9
< 9
< 16
< 9
< 17
< 9
< 13
< 12
< 9
< 9
< 35
< 10 MEAN
Table C-111.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 D-28 PREDATOR Largemouth Bass 05/11/23.
< 52
< 52
< 117
< 75
< 103
< 63
< 93
< 54
< 62 *
< 316
< 139 Largemouth Bass 10/06/23
< 85
< 78
< 206
< 104
< 175
< 83
< 158
< 95
<.66
< 518
< 197
- MEAN D-28 BOTTOM FEEDER Smallmouth Buffalo 05/11123
< 67
< 88
< 130
< 72
< 170
< 84
< 126
< 89
< 70
< 443
< 108 Common Carp 10/06123
< 66
< 74
< 130
< 59
< 153
< 58
< 112*
< 64
< 62
< 390
< 141*
MEAN
(')
I C11 D-46 PREDATOR Largemouth Bass 05/11/23
< 51
< 58
< 101
< 68
< 115
< 48
< 93
< 61
< 44
< 398
< 84 Largemouth Bass 10/06123
< 59
< 69
< 103
< 71
< 139
<. 78
< 110
< 65
< 56
< 440
< 128 MEAN D-46 BOTTOM FEEDER Smallmouth Buffalo 05/11/23
< 55
< 65
< 105
< 70
< 60
< 48
<*99
< 54
< 45 *
< 363
< 113 Common Carp 10/06/23
< 81
< 84
< 185
< 74
< 149
< 92
< 139
< 91
< 70
- < 480
< 164
- MEAN
C')
I a, Table C-IV.1 SITE D-27 COLLECTION PERIOD 05/17/23 10/28/23 MEAN Mn-54
< 87
< 86 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 Co-58
< 56
< 75 Fe-59
< 217
< 155 RESULTS IN UNITS OF PCI/KG DRY+/- 2 SIGMA Co-60
< 112
< 105 Zn-65
< 212
< 141 Nb-95
< 116
< 94 Zr-95
< 172
< 155 Cs-134
< 126
< 106 Cs-137
< 141
< 108 Ba-140
< 421
< 344 La-140
< 180
< 107
Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP!
GROUP II PERIOD 0-01 D-02 0-03 <1)
D-04 0-07 0-45 0-53 0-56 D-58 12/30/22 - 01/06/23 28 +/- 5 29 +/- 5 33 +/- 5 31 +/- 5 31 +/- 5 24 +/- 5 28 +/- 5 29 +/- 5 01/06/23 - 01/13123 28 +/- 5 26 +/- 4 34 +/- 5 35 +/- 5 33 +/- 5 27 +/- 4 26 +/- 4 29 +/- 5 01113123 - 01/20123 16 +/- 4 12 +/- 4 17 +/- 4 16 +/- 4 18 +/- 4 17 +/- 4 16 +/- 4 14 +/- 4 01/20123 - 01/27/23 17 +/- 4 20 +/- 4 20 +/- 4 16 +/- 4 19 +/- 4 19 +/- 4 19 +/- 4 17 +/- 4 01127123 - 02/03/23 22 +/- 3 19 +/- 5 27 +/- 5 22 +/- 5 23 +/- 5 19 +/- 5 18 +/- 5 24 +/- 5 02103123 - 02/10/23 (1) 24 +/- 5 28 +/- 5 24 +/- 5 17 +/- 4 22 +/- 5 22 +/- 5 25 +/- 5 02110123 - 02/17/23 9 +/- 4 9 +/- 4 9 +/- 4 11 +/- 4 18 +/- 4 14 +/- 4 9 +/- 4 14 +/- 4 02/17123 - 02/24/23 8 +/- 4 13 +/- 4 17 +/-
0 4
8 +/- 4 6 +/- 4 13 +/- 4 7 +/- 4 8 +/- 4 02124123 - 03103123 13 +/- 4 13 +/- 4 8 +/- 4 11 +/- 4 15 +/- 4 11 +/- 4 13 +/- 4 12 +/- 4 03103123 - 03/10/23 7 +/- 3 (1) 8 +/- 4 8 +/- 4 14 +/- 4 16 +/- 4 9 +/- 4 12 +/- 4 03110123 - 03/17/23
< 5 8 +/- 4 7 +/- 4 8 +/- 4 10 +/- 4 6 +/- 4 7 +/- 4 13 +/- 4 03117123 - 03/24/23 21 +/- 4
' 24 +/- 5 23 +/- 4 24 +/- 5 24 +/- 5 20 +/- 4 26 +/- 5 22 +/- 4 03124123 - 03/31/23 21 +/- 4 27 +/- 4 28 +/- 4 29 +/- 4 23 +/- 4 26 +/- 4 28 +/- 4 24 +/- 4 03131123 - 04/07123 15 +/- 4 22 +/- 5 21 +/- 5 20 +/- 5 17 +/- 4 22 +/- 4 19 +/- 4 18 +/- 4 04/07123 - 04114/23 25 +/- 5 24 +/- 5 31 +/- 5 27 +/- 5 27 +/- 5 19 +/- 4 29 +/- 5 24 +/- 5 04114123 - 04121123 18 +/- 4 12 +/- 4 19 +/- 4 17 +/- 4 13 +/- 4 13 +/- 4 18 +/- 4 16 +/- 4 04121123 - 04129123 10 +/- 3 14 +/- 4 13 +/- 3 14 +/- 4 10 +/- 3 11 +/- 3 15 +/- 4 12 +/- 3 04129123 - 05106123 7 +/- 3 9 +/- 4 8 +/- 3 7 +/- 3 7 +/- 3 9 +/- 4 8 +/- 4 7 +/- 3 05/06123 - 05112123 17 +/- 5 20 +/- 5 20 +/- 5 22 +/- 5 19 +/- 5 16 +/- 5 19 +/- 5 16 +/- 5 05/12123 - 05/19123 18 +/- 4 19 +/- 4 17 +/- 4 20 +/- 4 16 +/- 4 17 +/- 4 17 +/- 4 18 +/- 4 05/19123 - 05127123 10 +/- 4 10 +/- 4
- 12 +/- 4 12 +/- 4 10 +/- 4 10 +/- 4 11 +/- 4 11 +/- 4 05/27123 - 06102123 15 +/- 5 15 +/- 5 16 +/- 5 15 +/- 5 17 +/- 5 16 +/- 5 17 +/- 5 16 +/- 5 06102123 - 06109123 18 +/- 4 22 +/- 5 20 +/- 4 21 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 20 +/- 4 06109/23 - 06116123 18 +/- 4 13 +/- 4 12 +/- 4 11 +/- 4 7 +/- 3 14 +/- 4 12 +/- 4 11 +/- 4 06/16123 - 06123123 17 +/- 4 14 +/- 4 20 +/- 5 16 +/- 4 13 +/- 4 14 +/- 4 12 +/- 4 9 +/- 4 06/23123 - 06130123 18 +/- 4 20 +/- 4 22 +/- 4 22 +/- 4 22 +/- 4 20 +/- 4 17 +/- 4 21 +/- 4 06/30/23 - 07107/23 18 +/- 4 19 +/- 4 22 +/- 5 20 +/- 4 9 +/- 4 10 +/- 4 9 +/- 4 13 +/- 4 07107123 - 07114123 19 +/- 4 17 +/- 4 17 +/- 4 18 +/- 4 18 +/- 4 12 +/- 4 16 +/- 4 16 +/- 4 07114123 - 07/21123 16 +/- 4 18 +/- 4 15 +/- 4 18 +/- 4 17 +/- 4 17 +/- 4 19 +/- 4 17 +/- 4 07121/23 - 07128123 24 +/- 5 25 +/- 5 23 +/- 5 25 +/- 5 32 +/- 5 20 +/- 4 21 +/- 4 23 +/- 5 07128/23 - 08104123 20 +/- 4 21 +/- 4 21 +/- 4 24 +/- 4 21 +/- 4 21 +/- 4 21 +/- 4 20 +/- 4 08104123 - 08111123 20 +/- 4 20 +/- 4 20 +/- 4 19 +/- 4 18 +/- 4 22 +/- 5 15 +/- 4 19 +/- 4 08/11123 - 08118123 18 +/- 4 16 +/- 4 11 +/- 3 17 +/- 4 16 +/- 4 14 +/- 4 15 +/- 4 14 +/- 4 08/18/23 - 08125123 28 +/- 5 33 +/- 5 32 +/- 5 31 +/- 5 29 +/- 5 29 +/- 5 27 +/- 5 27 +/- 5 08/25123 - 09101/23 15 +/- 4 14 +/- 4 13 +/- 4 20 +/- 4 17 +/- 4 11 +/- 4 14 +/- 4 14 +/- 4 09101/23 - 09108123 13 +/- 4 16 +/- 4 12 +/- 4 15 +/- 4 16 +/- 4 11 +/- 4 12 +/- 4 14 +/- 4 09108123 - 09115123 16 +/- 4 17 +/- 4 9 +/- 3 16 +/- 4 16 +/- 4 17 +/- 4 15 +/- 4 14 +/- 4 09/15123 - 09122123 28 +/- 5 27 +/- 5 27 +/- 5 28 +/- 5 27 +/- 5 29 +/- 5 20 +/- 4 22 +/- 5 09122123 - 09129123 19 +/- 4 22 +/- 4 20 +/- 4 22 +/- 4 22 +/- 5 20 +/- 4 20 +/- 4 21 +/- 4 09/29123 - 10106123 32 +/- 6 35 +/- 6 26 +/- 5 34 +/- 6 33 +/- 5 30 +/- 5 30 +/- 5 29 +/- 5 10106123 - 10113123 15 +/- 4 16 +/- 4 17 +/- 4 16 +/- 4 19 +/- 4 18 +/- 4 17 +/- 4 16 +/- 4 10/13123 - 10120123 16 +/- 4 18 +/- 4 16 +/- 4 13 +/- 4 23 +/- 5 18 +/- 4 19 +/- 4 17 +/- 4 10120123 - 10127123 24 +/- 5 25 +/- 5 17 +/- 4 17 +/- 4 24 +/- 5 20 +/- 4 17 +/- 4 25 +/- 5 10127123 - 11/03123 17 +/- 4 19 +/- 4 16 +/- 4 19 +/- 4 23 +/- 5 17 +/- 4 24 +/- 5 20 +/- 4 11103123 - 11110123 33 +/- 5 39 +/- 5 28 +/- 5 33 +/- 5 35 +/- 5 32 +/- 5 34 +/- 5 44 +/- 6 11110123 - 11117123 23 +/- 5 25 +/- 5 22 +/- 5 20 +/- 4 29 +/- 5 22 +/- 5 24 +/- 5 26 +/- 5 11117123 - 11124123 9 +/- 4 13 +/- 4 10 +/- 4 14 +/- 4 12 +/- 4 16 +/- 4 13 +/- 4 13 +/- 4 11124123 - 12/01123 22 +/- 4 23 +/- 5 15 +/- 4 21 +/- 4 21 +/- 4 20 +/- 4 24 +/- 5 25 +/- 5 12101123 - 12108123 15 +/- 4 18 +/- 4 16 +/- 4 19 +/- 4 21 +/- 4 18 +/- 4 22 +/- 4 22 +/- 4 12108123 - 12115123 17 +/- 4 23 +/- 4 19 +/- 4 20 +/- 4 26 +/- 5 20 +/- 4 25 +/- 5 22 +/- 4 12115123 - 12122123 20 +/- 4 23 +/- 4 19 +/- 4 23 +/- 4 28 +/- 5 26 +/- 5 26 +/- 5 26 +/- 5 12122123 - 12/29/23 17 +/- 4 17 +/- 4 16 +/- 4 13 +/- 4 20 +/- 4 17 +/- 4 15 +/- 4 20 +/- 4 MEAN +/- 2 STD DEV 18 +/- 12 20 +/- 13 19 +/- 14 19 +/- 14 19 +/- 14 18 +/- 11 18 +/- 13 19 +/- 13 THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7
Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RES UL TS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA COLLECTION GROUP Ill GROUP IV PERIOD D-08 0-10 0-14 D-55 0-12 12/30/22 - 01/06/23 29 +/- 5 32 +/- 5 29 +/- 5 28 +/- 5 27 +/- 5 01/06/23 - 01/13/23 29 +/- 5 32 +/- 5 31 +/- 5 32 +/- 5 37 +/- 5 01/13/23 - 01/20/23 13 +/- 4 17 +/- 4 15 +/- 4 17 +/- 4 20 +/- 4 01/20/23 - 01/27/23 16 +/- 4 18 +/- 4 16 +/- 4 19 +/- 4 19 +/- 4 01 /27 /23 - 02/03/23 22 +/- 5 23 +/- 5 21 +/- 5 23 +/- 5 28 +/- 5 02/03/23 - 02/10/23 22 +/- 5 27 +/- 5 14 +/- 4 21 +/- 5 25 +/- 5 02/10/23 - 02/17/23 8 +/- 3 13 +/- 4 12 +/- 4 15 +/- 4 13 +/- 4 02/17/23 - 02/24/23
< 5 7 +/- 4 10 +/- 4 12 +/- 4 10 +/- 4 02/24/23 - 03/03/23 11 +/- 4 13 +/- 4 12 +/- 4 14 +/- 4 14 +/- 4 03/03/23 - 03/10/23 6 +/- 3 14 +/- 4 16 +/- 4 17 +/- 4 9 +/- 4 03/10/23 - 03/17/23 7 +/- 4 8 +/- 4 8 +/- 4 10 +/- 4 11 +/- 4 03/17/23 - 03/24/23 25 +/- 5 25 +/- 5 26 +/- 5 25 +/- 5 24 +/- 5 03/24/23 - 03/31/23 32 +/- 5 29 +/- 4 25 +/- 4 20 +/- 4 26 +/- 5 03/31/23 - 04/07/23 19 +/- 4 17 +/- 4 21 +/- 4 20 +/- 4 19 +/- 4 04/07/23 - 04/14/23 29 +/- 5 27 +/- 5 26 +/- 5 30 +/- 5 25 +/- 5 04/14/23 - 04/21/23 18 +/- 4 13 +/- 4 13 +/- 4 18 +/- 4 15 +/- 4 04/21/23 - 04/29/23 18 +/- 4 14 +/- 4 12 +/- 4 14 +/- 4 14 +/- 4 04/29/23 - 05/06/23 6 +/- 3 7 +/- 3 8 +/- 4 9 +/- 4 12 +/- 4 05/06/23 - 05/12/23 16 +/- 5 20 +/- 5 18 +/- 5 20 +/- 5 20 +/- 5 05/12/23 - 05/19/23 20 +/- 4 19 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 05/19/23 - 05/27/23 12 +/- 4 12 +/- 4 15 +/- 4 9 +/- 4 12 +/- 4 05/27/23 - 06/02/23 15 +/- 5 17 +/- 5 10 +/- 4 15 +/- 5 16 +/- 5 06/02/23 - 06/09/23 22 +/- 5 21 :i: 4 17 +/- 4 17 +/- 4 18 +/- 4 06/09/23 - 06/16/23 11 +/- 4 14 +/- 4 9 +/- 3 11 +/- 4 12 +/- 4 06/16/23 - 06/23/23 17 +/- 4 16 +/- 4 24 +/- 5 14 +/- 4 17 +/- 4 06/23/23 - 06/30/23 17 +/- 4 18 +/- 4 14 +/- 4 18 +/- 4 20 +/- 4 06/30/23 - 07/07/23 9 +/- 4 12 +/- 4 18 +/- 4 15 +/- 4 13 +/- 4 07/07/23 - 07/14/23 15 +/- 4 17 +/- 4 15 +/- 4 16 +/- 4 19 +/- 4 07/14/23 - 07/21/23 15 +/- 4 20 +/- 4 16 +/- 4 23 +/- 4 16 +/- 4 07/21/23 - 07/28/23 21 +/- 4 24 +/- 5 21 +/- 4 25 +/- 5 24 +/- 5 07/28/23 - 08/04/23 16 +/- 4 22 +/- 4 17 +/- 4 19 +/- 4 18 +/- 4 08/04/23 - 08/11/23 18 +/- 4 18 +/- 4 17 +/- 4 20 +/- 4 20 +/- 4 08/11/23 - 08/18/23 16 +/- 4 14 +/- 4 15 +/- 4 17 +/- 4 16 +/- 4 08/18/23 - 08/25/23 23 +/- 5 26 +/- 5 30 +/- 5 27 +/- 5 29 +/- 5 08/25/23 - 09/01/23 16 +/- 4 15 +/- 4 14 +/- 4 16 +/- 4 15 +/- 4 09/01/23 - 09/08/23 15 +/- 4 15 +/- 4 15 +/- 4 17 +/- 4 16 +/- 4 09/08/23 - 09/15/23 16 +/- 4 14 +/- 4 13 +/- 4 12 +/- 4 14 +/- 4 09/15/23 - 09/22/23 25 +/- 5 29 +/- 5 26 +/- 5 24 +/- 5 25 +/- 5 09/22/23 - 09/29/23 16 +/- 4 20 +/- 5 22 +/- 5 20 +/- 5 21 +/- 5 09/29/23 - 10/06/23 31 +/- 5 25 +/- 5 32 +/- 5 30 +/- 5 35 +/- 5 10/06/23 - 10/13/23 15 +/- 4 14 +/- 4 15 +/- 4 13 +/- 4 20 +/- 4 10/13/23 - 10/20/23 15 +/- 4 16 +/- 4 16 +/- 4 18 +/- 4 15 +/- 4 10/20/23 - 10/27/23 19 +/- 4 21 +/- 5 21 +/- 5 28 +/- 5 18 +/- 4 10/27/23 - 11/03/23 13 +/- 4 20 +/- 4 17 +/- 4 16 +/- 4 17 +/- 4 11/03/23 - 11/10/23 32 +/- 5 29 +/- 5 31 +/- 5 30 +/- 5 25 +/- 5 11/10/23 - 11/17/23 24 +/- 5 23 +/- 5 22 +/- 4 21 +/- 4 24 +/- 5 11/17/23 - 11/24/23 12 +/- 4 15 +/- 4 14 +/- 4 12 +/- 4 11 +/- 4 11/24/23 - 12/01/23 18 +/- 4 18 +/- 4 21 +/- 4 18 +/- 4 18 +/- 4 12/01/23 - 12/08/23 19 +/- 4 17 +/- 4 18 +/- 4 15 +/- 4 18 +/- 4 12/08/23 - 12/15/23 18 +/- 4 19 +/- 4 20 +/- 4 20 +/- 4 17 +/- 4 12/15/23 - 12/22/23 18 +/- 4 25 +/- 5 20 +/- 4 23 +/- 4 23 +/- 4 12/22/23 - 12/29/23 19 +/- 4 14 +/- 4 21 +/- 4 17 +/- 4 20 +/- 4 MEAN +/- 2 STD DEV 18 +/- 13 19 +/- 12 18 +/- 12 19 +/- 11 19 +/- 12 THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-8
Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+/- 2 SIGMA GROUP I - ON-SITE LOCATIONS GROUP II - NEAR-FIELD LOCATIONS GROUP Ill - FAR-FIELD LOCATIONS GROUP IV-CONTROL LOCATION COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN PERIOD
+/- 2SD PERIOD
+/-2SD PERIOD
+/-2SD PERIOD
+/-2SD 12/30/22 - 01/27/23 12 29 22 +/- 13 12/30/22 - 01/27/23 14 35 24 +/- 14 12/30/22 - 01/27/23 13 32 23 +/- 15 12/30/22 - 01/27/23 19 37 26 +/- 17 01 /27 /23 - 03/03/23 8
24 14 +/- 12 01/27/23 - 03/03/23 6
28 16 +/- 13 01/27/23 - 03/03/23 7
27 16 +/- 12 01/27/23 - 03/03/23 10 28 18 +/- 16 03/03/23 - 04/01/23 7
27 18 +/- 17 03/03/23 - 04/01/23 6
29 17 +/- 16 03/03/23 - 04/01/23 6
32 18 +/- 17 03/03/23 - 03/31/23 9
26 17 +/- 17 04/01/23 - 04/29/23 10 25 17 +/- 11 03/31/23 - 04/29/23 10 31 18 +/- 12 03/31/23 - 04/29/23 12 30 19 +/- 12 03/31/23 - 04/29/23 14 25 18 +/- 10 04/29/23 - 06/02/23 7
20 14 +/- 9 04/29/23 - 06/02/23 7
22 14 +/- 9 04/29/23 - 06/02/23 6
20 14 +/- 9 04/29/23 - 06/02/23 12 20 15 +/- 7 06/02/23 - 06/30/23 13 22 17 +/- 6 06/02/23 - 06/30/23 7
22 16 +/- 9 06/02/23 - 06/30/23 9
24 16 +/- 8 06/02/23 - 06/30/23 12 20 17 +/- 7 06/30/23 - 07/28/23 16 25 19 +/- 6 06/30/23 - 07/28/23 9
32 18 +/- 10 06/30/23 - 07/28/23 9
25 18 +/- 9 06/30/23 - 07/28/23 13 24 18 +/- 10 07/28/23 - 09/01/23 14 33 20 +/- 12 07/28/23 - 09/01/23 11 32 20 +/- 12 07/28/23 - 09/01/23 14 30 19 +/- 9 07/28/23 - 09/01/23 15 29 20 +/- 11 09/01/23 - 09/30/23 13 28 20 +/- 10 09/01/23 - 09/30/23 9
29 19 +/- 11*
09/01/23 - 09/29/23 12 29 19 +/- 10 09/01/23 - 09/29/23 14 25 19 +/- 10 09/30/23 - 11/03/23 15 35 22 +/- 14 09/29/23 - 11/03/23 13 34 21 +/- 11 09/29/23 - 11/03/23 13 32 20 +/- 13 09/29/23 - 11/03/23 15 35 21 +/- 16 11/03/23 - 12/01/23 9
39 23 +/- 20 11/03/23 - 12/01/23 10 44 23 +/- 17 11/03/23 - 12/01/23 12 32 21 +/- 13 11/03/23 -
12/01/23 11 25 20 +/- 13 12/01/23 - 12/29/23 15 23 19 +/- 6 12/01/23 - 12/29/23 13 28 21 +/- 8 12/01/23 - 12/29/23 14 25 19 +/- 5 12/01/23 -
12/29/23 17 23 19 +/- 5 0
I 12/30/22 - 12/29/23 7
39 19 +/- 13 12/30/22 - 12/29/23 6
44 19 +/- 13 12/30/22 - 12/29/23 6
32 18 +/- 12 12/30/22 - 12/29/23 9
37 19 +/- 12 (C
Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 D-01 12130122 - 04101123
< 2
< 2
< 7
< 2
< 5
< 2
< 3
< 2
< 2
< 32
< 14 04101123 - 06130123
< 2
< 2
< 5
< 3
< 5
< 2
< 4
< 2
< 2
< 21
< 9 06130123 - 09130123
< 2
< 2
< 5
< 2
< 6
< 3
< 3
< 2
< 2
< 15
< 8 09130123 - 12129123
< 2
< 2
< 4
< 2
< 4
< 2
< 3
< 2
< 2
< 11
<4 MEAN D-02 12130122 - 04101123
< 2
< 2
< 7
< 3
< 5
<2
< 5
< 3
< 2
< 37
< *13 04101123 - 06130123
< 2
< 2
< 7
< 2
< 5
< 2
< 4
< 2
< 2
< 20
< 11 06130123 - 09130123
< 3
< 3
< 9
< 3
< 7
< 4
< 7
< 3
< 3
< 29
< 12 09130123 - 12129123
< 2
< 2
< 7
< 2
< 5
< 2
< 4
< 2
< 2
< 12
< 5 MEAN D-03 12130122 - 04101123 (1) 04101123 - 06130123 (1) 06130123 - 09130123 (1) 09130123 - 12129123 (1)
C)
I.....
D-04 12130122 - 04101123
< 2
< 2
< 7
< 3
< 5
< 2
< 2
< 2
< 1
< 32
< 11 0
04101123 - 06130123
< 3
< 3
< 7
< 2
< 7
< 4
< 5
< 3
< 3
< 27
< 12 06130123 - 09130123
< 2
< 2
< 6
< 2
< 5
< 2
< 3
< 2
< 2
< 17
< 5 09/30123 - 12129123
< 2
< 2
< 5
< 2
< 5
< 2
< 4
< 2
< 1
< 13
< 5 MEAN D-07 12130122 - 04101/23
< 3
< 3
< 8
< 2
< 6
< 3
< 5
<4
< 2
< 45
< 16 04101123 - 06/30123
< 2
< 2
< 4
< 2
< 5
< 2
< 4
< 2
<2
< 16
< 8 06130123 - 09/30/23
< 2
< 3
< 6
< 3
< 7
< 3
< 5
< 3
< 2
< 22
< 10 09130123 - 12129123
< 2
< 2
< 6
< 3
<4
< 2
< 5
< 3
< 2
< 16
< 7 MEAN D-08 12130122 -
03/31123
< 2
< 3
< 7
< 2
< 5
< 3
<4
< 2
< 2
< 35
< 7 03131123 -
06130/23
< 2
< 3
< 6
< 4
< 6
< 3
< 5
< 2
< 2
< 27
< 5 06130123 -
09/29123
< 2
< 2
< 6
< 3
< 6
< 3
<4
< 2
< 2
< 17
< 6 09129123 - 12/29123
< 1
< 2
< 5
< 2
<4
< 3
< 2
.< 2
< 2
< 11
< 5 MEAN D-10 12130122 - 04101123
< 2
< 2
< 7
< 3
<-5
< 2
< 4
< 2
< 2
< 28
< 8 04101123 - 06130123
< 3
< 2
< 6
< 2
< 5
< 3
< 4
< 3
< 2
< 22
< 6 06130123 - 09/29123
< 3
< 3
< 7
< 3
< 6
< 3
< 4
< 3
< 2
< 26
< 9 09129123 - 12129123
< 2
< 3
< 5
< 3
< 6
< 3
< 4
< 3
< 2
< 14
< 4 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION
Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF E-3PCI/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 Bac140 La-140 D-12 12/30/22 - 03/31/23
< 2
< 2
< 7
< 2
<4
< 3
< 4
< 1
< 2
<"30
< 18 03/31/23 - 06/30/23
< 3
< 2
< 6
< 3
< 6
< 3
< 4
< 3
< 3
< 30
< 10 06/30/23 - 09/29/23
<2
< 2
< 5
< 1
< 6
< 2
< 5
< 3
- < 2*
< 19
< 9 09/29/23 - 12/29/23
< 3
< 3.
< 8
< 5
< 8
< 3
< 6
< 3
< 3
< 26
< 8 MEAN D-14 12/30/22 - 03/31 /23
< 3
<4
< 8
<4
< 8
< 4
< 7
< 4
< 2
< 56
< 19 03/31 /23 - 06/30/23
< 2
< 2
<4
< 2
<4
< 2
< 4
< 2
< 2
< 21
< 9 06/30/23 - 09/29/23
<4
< 4
< 9
< 5
< 8
< 4
< 7
< 4
< 3
< 31
< 1b 09/29/23 - 12/29/23
< :3
< 3
< 6
< 3
< 5
<2
<4
< 2
< 3
< 12
< 6 MEAN D-45 12/30/22 - 03/31 /23
< 2
< 2
< 5
< 3
< 3
<2
<4
<2
<2
< 34
< 16 03/31 /23 - 06/30/23
< 2
< 2
< 5
< 2
<4
<2
<4
< 2
< 2
< 20
< 10 06/30/23 - 09/29/23
< 2
< 2
< 6
< 3
< 1
< 2
< 4
< 2
< 1
< 14
< 10 09/29/23 - 12/29/23
< 2
< 2
< 5
< 2
<4
< 2
< 3
< 2
< 2
< 11
< 6 C)
MEAN I.....
D-53 12/30/22 - 04/01 /23
< 3
< 3
< 7
< 3
< 7
< 3
< 6
-<3
< 3
< 40
< 16 04/01 /23 - 06/30/23
< 2
< 3
< 6
< 2
. < 4
< 3
<4
< 2
<2
< 16
< 10 06/30/23 - 09/29/23
< 2
< 2
< 5
< 3
<4
< 2
< 3
< 2
< 2
< _14
< 6 09/29/23 - 12/29/23
< 2
< 2
< 6
< 3
< 8
< 3
<4
< 2
< 2
< 13
< 6 MEAN D-55 12/30/22 - 03/31/23
< 3
< 3
< 5
< 3
< 6
< 3
<4
< 3
< 2
< 32
< 7 03/31 /23 - 06/30/23
< 3
<4
< 7
< 4
< 8
< 3
< 8
< 3
< 3
< 33
< 16 06/30/23_ - 09/29/23
< 2
< 2
<5
< 1
< 5
< 2
< 3
< 2
< 2
< 15
< 6 09/29/23 - 12/29/23
< 3
< 3
< 7
< 3
< 7.
< 3
< 5
< 3
< 3
< 19
< 6 MEAN D-56 12/30/22 - 04/01/23
< 2
< 3
< 7
< 3
< 5
< 2
< 4
<2
< 1
< 29
< 12 04/01/23. - 06/30/23
< 2 *
< 2
< 5
< 2
< 6
<2
< 4
<2
< 2*
< 20
< 4 06/30/23 " 09/30/23
< 3
<4
< 6
< 2
< 6
< 3
< 6
< 3
<2
< 25
< 9 09/30/23 - 12/29/23
< 3
< 3
< 6
< 3
< 7
< 3
< 5
< 3
< 3
< 16
< 6 MEAN D-58 12/30/22 - 04/01/23
< 2
< 3
< 5
< 3
< 5
< 3
< 5
< 2
< 2
< 26
< 13 04/01/23 - 06/30/23
< 2
< 3
< 5
< 3
< 7
< 3
< 4
<2
< 2
< 20
<4 06/30/23 - 09/30/23
< 2
< 2
< 6
< 2
< 4
<2
<3
< 2
< 2
< 18
< 7 09/30/23 - 12/29/23
< 2
< 2
< 6
< 2
< 6
.< 3
<"3
< 2
< 2
< 11
< 8 MEAN
Table C-Vl.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+ 2 SIGMA COLLECTION GROUP I GROUP II PERIOD 0-01 0-02 0-03(1) 0-04 0-07 0-45 0-53 0-56 0-58 12/30/22 - 01/06/23
< 42
< 18
< 42
< 43
< 37
< 37
< 28
< 28 01/06/23 - 01/13/23
< 42
< 42
< 42
< 43
< 34
< 22
< 27
< 27 01/13/23 - 01/20/23
< 18
< 43
< 43
< 43
< 35
< 36
< 32
< 32 01/20/23 - 01/27/23
< 26
< 31
< 31
< 31
< 34
< 33
< 47
< 47 01/27/23 - 02/03/23
< 25
< 36
< 36
< 24
< 48
< 45
< 21
< 20 02/03/23 - 02/10/23 (1)
< 50
< 21
< 50
< 53
< 24
< 29
< 29 02/10/23 - 02/17/23
< 18
< 42
< 42
< 42
< 32
< 32
< 45
< 45 02/17/23 - 02/24/23
< 38
< 38
< 38
< 51
< 42
< 42
< 20
< 41 02/24/23 - 03/03/23
< 35
< 17
< 35
< 35
< 35
< 33
< 30
< 30 03/03/23 - 03/10/23
< 28 (1)
< 28
< 28
< 27
< 26
< 26
< 26 03/10/23 - 03/17/23
< 33
< 15
< 33
< 33
< 28
< 23
< 39
< 39 03/17/23 - 03/24/23
< 33
< 15
< 33
< 33
< 31
< 30
< 29
< 29 03/24/23 - 03/31/23
< 27
< 26
< 27
< 27
< 36
< 30
< 27
< 27 03/31/23 - 04/07/23
< 28
< 28
< 28
< 12
< 31
< 32
< 34
< 23 04/07/23 - 04/14/23
< 35
< 35
< 35
< 35
< 42
< 39
< 30
< 30 04/14/23 - 04/21/23
< 44
< 45
< 44
< 41
< 41
< 16
< 40
< 40 04/21/23 - 04/29/23
< 38
< 38
< 38
< 38
< 23
< 22
< 24
< 24 04/29/23 - 05/06/23
< 35
< 35
< 17
< 35
< 53
< 22
< 39
< 39 05/06/23 - 05/12/23
< 31
< 32
< 15
< 32
< 34
< 18
< 44
< 44 05/12/23 - 05/19/23
< 44
< 44
< 44
< 44
< 31
< 29
< 19
< 19 05/19/23 - 05/27/23
< 38
< 16
< 38
< 39
< 31
< 14
< 40
< 40 05/27/23 - 06/02/23
< 45
< 46
< 45
< 46
< 52
< 49
< 44
< 44 06/02/23 - 06/09/23
< 63
< 64
< 27
< 64
< 51
< 22
< 34
< 34 06/09/23 - 06/16/23
< 42
< 42
< 42
< 40
< 33
< 33
< 14
< 32 06/16/23 - 06/23/23
< 17
< 20
< 20
< 20
< 20
< 19
< 41
< 41 06/23/23 - 06/30/23
< 48
< 20
< 48
< 48
< 46
< 20
< 22
< 23 06/30/23 - 07/07/23
< 34
< 34
< 10
< 20
< 45
< 18
< 44
< 44 07/07/23 - 07/14/23
< 37
< 37
< 37
< 37
< 39
< 17
< 48
< 48 07/14/23 - 07/21/23
< 36
< 36
< 15
< 36
< 36
< 16
< 58
< 58 07/21/23 - 07/28/23
< 53
< 53
< 53
< 53
< 60
< 26
< 44
< 44 07/28/23 - 08/04/23
< 27
< 27
< 27
< 45
< 47
< 49
< 47
< 48 08/04/23 - 08/11/23
< 40
< 40
< 17
< 40
< 47
< 20
< 31
< 31 08/11/23 - 08/18/23
< 33
< 33
< 37
< 33
< 45
< 19
< 35
< 35 08/18/23 - 08/25/23
< 19
< 20
< 13
< 20
< 34
< 37
< 31
< 31 08/25/23 - 09/01/23
< 19
< 45
< 45
< 45
< 39
< 36
< 41
< 41 09/01/23 - 09/08/23
< 33
< 33
< 22
< 33
< 42
< 17
< 37
< 37 09/08/23 - 09/15/23
< 19
< 45
< 45
< 46
< 33
< 14
< 31
< 31 09/15/23 - 09/22/23
< 36
< 36
< 36
< 36
< 34
< 26
< 37
< 37 09/22/23 - 09/29/23
< 32
< 15
< 33
< 33
< 42
< 39
< 26
< 26 09/29/23 - 10/06/23
< 50
< 21
< 50
< 50
< 40
< 38
< 41
< 41 10/06/23 - 10/13/23
< 46
< 46
< 46
< 47
< 18
< 41
< 26
< 26 10/13/23 - 10/20/23
< 41
< 37
< 37
< 37
< 42
< 18
< 34
< 34 10/20/23 - 10/27/23
< 25
< 25
< 19
< 25
< 25
< 25
< 39
< 39 10/27/23 - 11/03/23
< 44
< 45
< 42
< 45
< 39
< 41
< 32
< 31 11/03/23 - 11/10/23
< 35
< 32
< 30
< 32
< 36
< 15
< 41
< 41 11/10/23 - 11/17/23
< 37
< 37
< 28
< 37
< 31
< 30
< 44
< 44 11/17/23 - 11/24/23
< 31
< 31
< 15
< 31
< 34
< 33
< 39
< 39 11/24/23 - 12/01/23
< 33
< 33
< 34
< 15
< 38
< 41
< 30
< 30 12/01/23 - 12/08/23
< 20
< 47
< 46
< 47
< 33
< 25
< 37
< 37 12/08/23 - 12/15/23
< 28
< 28
< 20
< 28
< 13
< 26
< 45
< 45 12/15/23 - 12/22/23
< 46
< 19
< 46
< 46
< 53
< 22
< 40
< 40 12/22/23 - 12/29/23
< 38
< 37
< 38
< 37
< 62
< 25
< 47
< 47 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-12
Table C-Vl.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF E-3 PCI/CU METER+ 2 SIGMA COLLECTION GROUP Ill GROUP IV PERIOD D-08 D-10 D-14 D-55 D-12 12/30/22 - 01/06/23
< 42
< 37
< 25
< 28
<*37 01/06/23 - 01/13/23
< 14
< 34
< 34
< 28
<.34, 01/13/23 - 01/20/23
< 43
< 35
< 36
< 32
< ~4
- 01/20/23 - 01/27/23
< 31
< 34
< 34
<-48
<*29 01/27/23 - 02/03/23
< 36
< 36
< 20
< 47
< 47 02/03/23 - 02/10/23
< 50
< 53
< 53
< 29
< 53 02/10/23 - 02/17/23
< 42
< 32
< 15
< 46
< 32 02/17/23 - 02/24/23
< 51
< 51
< 22
< 42
< 51 02/24/23 - 03/03/23
< 35
< 34
< 35
- < 31
< 24
- 03/03/23 - 03/10/23
< 28
< 27
< 27
< 12
< 27.
03/10/23 - 03/17/23
< 33
< z'8
< 28
< 40
< 28 03/17/23 - 03/24/23
< 34
< 31
< 14
< 30
< 31 03/24/23 - 03/31/23
< 14
< 29
< 15
< 32
< 35 03/31/23 - 04/07/23
< 22
< 25
< 22
< 31
< 23 04/07/23 - 04/14/23
<-18
< 41
< 42
.< 31
< 42 04/14/23 - 04/21/23
< 40
< 40
< 17
< 41
< 42 04/21/23 - 04/29/23
< 16
< 23
< 23
< 25
< 10 04/29/23 *- 05/06/23
< 35
< 52
< 53
<'40
< 52 05/06/23 C 05/12/23
< 32
< 34
< 34
< 44
- < 34 05/12/23 - 05/19/23
< 19
< 15
< 31
< 19
< 31 05/19/23 - 05/27/23
< 39
< 31
< 31
< 41
< 31 05/27/23 - 06/02/23
< 19
< 51
< 22
< 45
< 51 06/02/23 - 06/09/23
< 64
< 51
< 51
< 35
< 52 06/09/23 - 06/16/23
< 40
< 40
< 40
< 33
< 17 06/16/23 - 06/23/23
< 20
< 20
< 9
< 42
< 20 06/23/23 - 06/30/23
< 50
< 45
< 46
< 18
< 46 06/30/23 - 07/07/23
< 47
< 47
< 47
< 45
< 48 07/07/23 - 07/14/23
< 25
< 38
< 39
< 49
< 38 07/14/23 - 07/21/23
< 36
< 36
< 36
< 60
< 36 07/21/23 - 07/28/23
< 22
< 60
< 61
< 45
< 60 07/28/23 - 08/04/23
< 45
< 45
< 19
< 20
< 45 08/04/23 - 08/11/23
< 40
< 47
< 47
< 31
< 48 08/11/23 - 08/18/23
< 33
< 44
< 45
< 36
< 45 08/18/23 - 08/25/23
< 20
< 33
< 34
< 32
< 34 08/25/23 - 09/01/23
< 45
< 38
< 30
< 42
< 38 09/01/23 - 09/08/23
< 33
< 42
< 42
< 37
< 42 09/08/23 - 09/15/23
< 46
< 33
< 34
< 32
< 33 09/15/23 - 09/22/23
< 17
< 34
< 34
< 37
< 34 09/22/23 - 09/29/23
< 40
< 40
< 17
< 32
< 41 09/29/23 - 10/06/23
< 44
< 17
< 40
< 37
< 40 10/06/23 - 10/13/23
< 20
< 41
< 42
- < 27
< 42 10/13/23 - 10/20/23
< 37
< 42
< 42
< 34
< 42 10/20/23 - 10/27/23
< 25
< 25
< 11
< 40
< 25 10/27/23 - 11/03/23
< 19
< 38
< 39
< 32,
< 38 11/03/23 - 11/10/23
< 32
< 36
< 36
< 42
< 36 11/10/23 - 11/17/23
< 37
< 31
< 31
< 45
< 14 11/17/23 - 11/24/23
< 31
< 15
< 34
< 39
< 34 11/24/23 12/01/23
< 34
< 38
< 39
< 31
< 38 12/01/23 - 12/08/23
< 48
< 33
< 33
< 37
< 34 12/08/23 - 12/15/23
< 28
< 26
< 26
< 46
< 26 12/15/23 12/22/23
< 46
< 53
< 53
< 40
< 53 12/22/23 - 12/29/23
< 20
< 60
< 62
< 47
< 60 MEAN C-13
Table C-Vll.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 D-25 Swiss chard 07113123
< 21
< 21
< 50
< 30
< 51
< 26
< 33
< 30
< 26
< 19
< 76
< 29 Mustard greens 07113123
< 34
< 39
< 94
< 45
< 101
< 33
< 63
< 53
< 37
< 39
< 169
< 30 Collard greens 07114123
< 28
< 24
< 64
< 33
< 70
< 28
< 36
< 34
< 27
< 22
< 110
< 37 Radish 08117123
< 40
< 27
< 83
< 49
< 80
< 42
< 62
< 51
< 38
< 35
< 126
< 30 Mustard greens 08117123
< 29
< 26
< 46
< 28
< 71
< 31
< 49
< 40
< 28
< 32
< 119
< 28 Kale 08117123
< 29
< 29
< 77
< 33
< 70
< 36
< 53
< 35
< 41
< 34
< 128
< 41 Collard greens 08117123
< 21
< 23
< 57
< 30
< 59
< 29
< 43
< 41
< 29
< 24
< 93
< 38 Kale 09115123
< 30
< 35
< 87
< 40
< 85
< 44
< 57
< 43
< 37
< 33
< 114
< 38 Turnip 09115123
< 21
< 23
< 46
< 29
< 39
< 17
< 41
< 35
< 24
< 32
< 75
< 33 Collard greens 09115123
< 27
< 19
< 57
< 29
< 51
< 28
< 53
< 42
< 31
< 27
< 106
< 25 Kale 10113123
< 25
< 27
< 50
< 32
< 59
< 26
< 48
< 33
< 24
< 30
< 123
< 33 Turnip 10113123
< 22
< 24
< 49
< 24
< 53
< 28
< 42
< 33
< 27
< 26
< 110
< 35 0
Swiss chard 10113123
< 31
< 28
< 52
< 39
< 76
< 25
< 47
< 42
< 25
< 33
< 147
< 34 I
Red beets 10113123
< 13
< 12
< 31
< 14
< 37
< 13
< 21
< 21
< 16
< 16
< 61
< 11 MEAN 0-39 Kohlrabi 07114/23
< 36
< 32
< 77
< 30
< 58
< 38
< 55
< 39
< 32
< 44
< 143
< 34 Broccoli 07/14/23
< 37
< 37
< 84
< 41
< 91
< 48
< 59
< 47
< 42
< 53
< 154
< 41 Cabbage 07/14/23
< 18
< 18
< 40
< 23
< 42
< 19
< 33
< 26
< 24
< 21
< 80
< 30 MEAN D-42 Turnip 07/14/23
< 24
< 21
< 43
< 20
< 50
< 25
< 35
< 32
< 23
< 24
< 106
< 29 Collard greens 08/18/23
< 42
< 26
< 72
< 27
< 87
< 35
< 76
< 49
< 56
< 34
< 138
< 46 Radish 08/18/23
< 20
< 25
< 51
< 25
< 52
< 21
< 46
< 29
< 23
< 27
< 89
< 33 Kale 08/18/23
< 33
< 30
< 59
< 41
< 79
< 37
< 46
< 37
< 32
< 40
< 123
< 41 Swiss chard 09/15/23
< 23
< 22
< 45
< 15
< 46
< 22
< 35
< 31
< 22
< 24
< 88
< 39 Turnip 09/15/23
< 22
< 25
< 49
< 30
< 57
< 23
< 54
< 38
< 22
< 34
< 124
< 22 Collard greens 09115123
< 39
< 37
< 80
< 41
< 79
< 40
< 70
< 47
< 39
< 49
< 179
< 40 Collard greens 10113123
< 33
< 31
< 65
< 45
< 75
< 35
< 60
< 51
< 32
< 36
< 123
< 41 Swiss chard 10113123
< 28
< 20
< 56
< 34
< 55
< 26
< 44
< 34
< 27
< 34
< 109
< 34 Radish 10113123
< 18
< 20
< 34
< 27
< 44
< 17
< 34
< 27
< 22
< 18
< 72
< 25 MEAN
Table C-Vll.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 D-43 Turnip 07/14/23
< 22
< 22
< 57
< 28
< 64
< 27
< 46
< 45
< 28
< 29
< 109
< 39 Kale 07/14/23
< 34
< 38
< 89
< 50
< 92
< 32
< 73
< 52
< 48
< 35
< 152
< 34 Collard greens 07/14123
< 21
< 17
< 43
< 26
< 54
< 23
< 29
< 26
< 25
< 21
< 67
< 26 Turnip 08/18/23
< 21
< 22
< 48
< 21
< 52
< 21
< 40
< 29
< 23
< 22
< 104
< 29 Kale 08/18/23
< 34
< 36
< 58
< 39
< 77
< 27
< 54
< 39
< 38
< 35
< 135
< 31 Collard greens 08/18/23
< 25
< 30
< 45
< 35
< 57
< 32
< 49
< 43
< 27
< 26
< 121
< 24 Turnip 09115123
< 16
< 16
< 43
< 22
< 45
< 19
< 28
< 27
< 20
< 17
< 71
< 21 Kale 09/15/23
< 28
< 29
< 74
< 31
< 70
< 30
< 44
< 42
< 21
< 32
< 142
< 35 Swiss chard 09/15/23
< 36
< 29
< 84
< 50
< 84
< 33
< 61
< 48
< 40
< 32
< 139
< 54 Turnip 10/06/23
< 28
< 35
< 57
< 36
< 65
< 27
< 42
< 38
< 39
< 29
< 114
< 32 Kale 10106123
< 31
< 36
< 64
< 46
< 66
< 29
< 67
< 47
< 37
< 42 0
< 162
< 33 Collard greens 10/06/23
< 23
< 23
< 78
< 39
< 92
< 33
< 49
< 45
< 36
< 35
< 120
< 47
()
MEAN I.....
01 D-44 Kale 07/14/23
< 32
< 30
< 62
< 43
< 79
< 33
< 57
< 46
< 43
< 33
< 136
< 45 Spinach 07/14/23
< 29
< 23
< 65
< 36
< 61
< 26
< 40
< 44
< 33
< 32
< 134
< 43 Collard greens 07/14/23
< 31
< 32
< 52
< 26
< 65
< 27
< 42
< 36
< 30
< 26
< 114
< 36 Kale 08118123
< 42
< 34
< 63
< 38
< 81
< 35
< 55
< 50
< 46
< 39
< 121
< 59 Mustard greens 08/18123
< 34
< 23
< 68
< 36
< 28
< 28
< 61
< 40
< 36
< 30
< 102
< 40 Collard greens 08/18/23
< 24
< 28
< 54
< 33
< 72
< 32
< 45
< 44
< 33
< 32
< 103
< 42 Kale 09/15/23
< 38
< 32
< 73
< 45
< 65
< 30
< 50
< 46
< 30
< 36
< 131
< 37 Turnip 09115/23
< 30
< 29
< 62
< 37
< 73
< 43
< 64
< 47
< 38
< 35
< 124
< 34 Collard greens 09/15/23
< 33
< 30
< 59
< 42
< 70
< 29
< 63
< 49
< 36
< 24
< 123
< 44 Kale 10/13/23
< 30
< 29
< 65
< 38
< 72
< 37
< 56
< 37
< 30
< 32
< 125
< 21 Turnip 10/13/23
< 14
< 17
< 34
< 17
< 37
< 17
< 26
< 25
< 19
< 17
< 71
< 20 Collard greens 10/13/23
< 28
< 29
< 63
< 27
< 63
< 31
< 47
< 43
< 37
< 30
< 122
< 31 MEAN
Table C-V111.1 QUARTERLY DLR RESULTS FOR DRESDEN NUCLEAR POWER STATION, 2023 Location Ba+
Normalized Net Dose, Annual BA+
Annual Qtrly
- Baseline, Normalized Facility Location
- Baseline, MDDa Max (mrem/std. Qtr.)
Bli MDDA(Z)
Dose, MA Dose,FA Ba (mrem) (mrem) 1 I 2 I 3 I 4 (mrem)
(mrem)
(mrem/yr)
(mrem)
D-01 27.7 40.5 15.5 15.8 19.8 17.3 110.7 155.1 68.4 ND D-02 28.8 41.6 13.7 12.2 17.2 16.1 115.4 159.8 59.2 ND D-03 23.9 36.7 14.8 12.3 17.8 14.8 95.6 140.0 59.7 ND D-04 27.4 40.2 (3) 14.1 19.4 16.0 109.7 154.1 49.5 ND D-07 26.7 39.5 15.0 13.8 20.1 17.0 106.6 151.0 65.9 ND D-08 24.4 37.2 16.7 13.0 17.8 17.4 97.8 142.2 64.8 ND D-10 28.6 41.4 15.1 12.4 19.3 17.0 114.5 158.9 63.7 ND D-12 23.7 36.5 11.5 12.7 16.6 17.3 90.2 134.6 58.1 ND D-14 23.5 36.3 13.2 12.6 14.6 16.2 93.8 138.2 56.7 ND 0-45 23.2 36.0 17.7 14.2 20.2 18.5 92.9 137.3 70.6 ND 0-53 27.5 40.3 13.7 12.3 15.3 14.8 110.0 154.4 56.1 ND D-55 27.2 40.0 14.0 14.5 15.8 14.6 108.8 153.2 58.9 ND 0-56 25.3 38.1 12.5 7.7 12.9 14.6 101.1 145.5 47.7 ND D-58 26.5 39.3 10.2 7.6 11.4 12.5 105.9 150.3 41.7 ND 0-101 26.6 39.4 14.7 14.8 24.0 17.8 106.5 150.9 71.3 ND D-102 28.6 41.4 16.3 18.4 20.0 19.0 114.3 158.7 73.7 ND 0-103 26.4 39.2 14.8 12.1 15.2 15.5 105.6 150.0 57.6 ND 0-104 28.3 41.1 18.5 16.9 19.1 16.2 107.4 151.8 70.8 ND D-105 27.1 39.9 18.6 15.2 15.6 17.0 108.6 153.0 66.3 ND D-106 24.1 36.9 10.5 10.0 14.6 12.7 91.7 136.1 47.8 ND D-107 23.8 36.6 12.0 10.9 16.8 12.5 95.3 139.7 52.2 ND 0-108 26.8 39.6 13.7 12.8 13.8 15.2 107.3 151.7 55.5 ND 0-109 27.0 39.8 16.0 13.2 20.0 17.7 108.2 152.6 66.9 ND D-110 31.1 43.9 19.2 17.8 20.4 23.5 124.6 169.0 81.0 ND D-111 28.6 41.4 17.6 14.1 16.7 17.5 103.1 147.5 66.0 ND D-112A 25.3 38.1 11.5 11.9 16.2 15.5 101.2 145.6 55.2 ND D-113 25.1 37.9 14.5 11.3 16.0 16.0 95.5 139.9 57.8 ND 0-114 24.6 37.4 12.8 11.1 14.3 12.8 98.2 142.6 51.0 ND D-115 27.5 40.3 16.4 14.4 17.1 16.0 110.2 154.6 63.9 ND D-116 29.4 42.2 21.3 17.8 20.3 20.6 117.7 162.1 80.1 ND D-201 30.8 43.6 17.7 16.5 21.6 20.8 110.8 155.2 76.5 ND 0-202 27.6 40.4 17.3 13.7 21.1 17.4 104.9 149.3 69.5 ND 0-203 26.2 39.0 13.1 10.9 17.0 17.0 94.4 138.8 58.1 ND D-204 24.4 37.2 11.7 8.3 16.4 13.8 97.8 142.2 50.3 ND D-205 24.6 36.1 15.1 14.6 16.9 15.2 93.4 137.8 61.9 ND D-206 26.6 39.4 16.0 13.3 17.9 14.6 101.1 145.5 61.7 ND 0-207 24.8 37.6 12.0 11.1 15.9 13.1 99.1 143.5 52.2 ND D-208 23.0 35.8 11.6 12.3 16.0 12.6 91.9 136.3 52.5 ND D-209 23.1 35.9 12.4 8.7 15.4 15.6 92.4 136.8 52.1 ND D-210 26.1 38.9 16.5 15.0 19.9 15.7 104.6 149.0 67.1 ND D-211 27.7 40.5 16.1 17.1 19.0 17.5 111.0 155.4 69.7 ND D-212 24.5 37.3 12.3 12.4 15.4 12.6 98.0 142.4 52.8 ND 0-213 23.1 35.9 11.6 10.1 14.7 11.5 92.6 137.0 47.9 ND 0-214 31.0 43.8 14.8 13.8 18.7 16.8 123.8 168.2 64.1 ND D-215 29.9 42.7 18.4 15.2 23.5 19.0 119.8 164.2 76.1 ND D-216 28.0 40.8 15.9 11.1 19.0 14.5 106.3 150.7 60.5 ND 111 Baseline background dose (BB,J: The estimated mean background radiation dose at each field monitoring location annually based on historical measurements, excluding any dose contribution from the monitored facility 1"1 Minimum differential dose (MDD,J: The smallest amount of facility related dose at each monitored location annually above the baseline background dose that can be reliably detected by an environmental dosimetry system (3) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANA T/ON C-16
- ! 0 C.
FIGURE C-1 SURFACE WATER - GROSS BETA - STATION D-52 (C)
COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 D-52 (C) DesPlaines River at Will Road 16 14 12 10 8
6 4
2 0
01-28-00 01-20-06 01-13-12 01-05-18 12-29-23 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 C-17
- ! 0 FIGURE C-2 SURFACE WATER - GROSS BETA - STATION D-57 (C)
COLLECTED IN THE VICINITY OF DNPS, 2006 - 2023 D-57 (C) Kankakee River at Will Road 32 28 24 20 C.
16 12 8
4 0
07-28-06 12-05-10 04-14-15 08-22-19 12-30-23 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 0-54 LOCATION REMOVED FROM PROGRAM JUNE 28, 2007 AND REPLACED WITH 0-57 C-18
FIGURE C-3 SURFACE WATER - GROSS BETA - STATION D-21 COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 D-21 Illinois River at EJ&E Bridge 30 25 20 15 u
C.
10 5
0 04-27-07 06-28-11 08-29-15 10-30-19 12-31-23 D-21 PLACED INTO SERVICE ON MARCH 30, 2007, REPLACED 0-51 C-19
0 FIGURE C-4 SURFACE WATER -TRITIUM - STATION D-52 (C)
COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 D-52 (C) Des Plaines River at Will Road 600 500 400 300 C.
200 100 0+---~~~---------~------~
03-31-00 03-09-06 02-15-12 01-23-18 01-01-24 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 C-20
FIGURE C-5 *,
I SURFACE WATER -TRITIUM - SljATION D-57 (C)
COLLECTED IN THE VICINITY OF DNPS, 2006 - 2023 7000 6000 5000 4000 u
C.
3000 2000 1000 0
12-20-06 D-57 (C) Kankakee River at Will Road i
i 03-24-11 06-26-15 09-28-19 I
12-31-23 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 i
AND MDC VALUES AFTER JULY 2005 i
C-21
FIGURE C-6 SURFACE WATER - TRITIUM - STATION D-21 COLLECT.ED IN THE-VICINITY OF DNPS, 2007 - 2023 D-21 Illinois River at EJ&E Bridge 1600 1400 1200 1000
.J i3 800 C.
600 400 200 0
06-29-07 08-14-11
, 09-29-15 11-14-19 12-30-23 0-21 REPLACED D-51 JUNE 29, 2007 C-22
FIGURE C-7 GROUND WATER-TRITIUM -STATION D-22 COLLECTED IN THE VICINITY OF DNPS, 2020 - 2023 D-22 Thorsen Road Well 400
~
200 l:>---9---0--o--O--O--o--o-------o.......
0+------~---------~
01-01-20 05-02-21 09-01-22 01-01-24 C-23
FIGURE C-8 GROUND WATER-TRITIUM - STATION D-35 COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 i3 C.
D-35 Dresden Lock and Dam 400 350 300 250 200 150 100 50 0
01-01-00 12-31-05 12-31-11 12-30-17 12-30-23 FIGURE C-9 GROUND WATER-TRITIUM - STATION D-39 COLLECTED IN THE VICINITY OF DNPS, 2023 D-39 Will Road Well 400
- ! u 200 C.
0+-----~----...-----~------,
01-01-22 07-01-22 01-01-23 07-01-23 01-01-24 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MCD VALUES AFTER JULY 2005 C-24
FIGURE C-10 AIR PARTICULATES - GROSS BETA - STATIONS D-01 and D-02 COLLECTED IN THE VICINITY OF DNPS, 2000 - 2022
-E u c..
0 UJ 0....
50.0 40.0
-E 0
30.0 c..
~ 20.0 0....
10.0 D-01 Onsite Station 1 0.0 -+-----~---~----~----~
01-08-00 01-05-06 01-03-12 12-31-17 12-29-23 D-02 Onsite Station 2 50.0 40.0 30.0 20.0 10.0 0.0 -+------.-------r------r------,
01-08-00 01-05-06 01-03-12 12-31-17 12-29-23 0-02 No samples; power was restored on 09-16-05.
C-25
FIGURE C-11 AIR PARTICULATES - GROSS BETA - STATIONS D-03 and D-04 COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 60.0 50.0 M
40.0 E 5
- c. 30.0 M
0 UJ 0
20.0 10.0 D-03 Onsite Station 3 0.0 +----------------------1 01-08-00 60.0 50.0 E
4o.o 5
- c.
30.0 M
0 UJ o
20.0 10.0 01-05-06 01-03-12 12-31-17 12-29-23 D-04 Collins Road on Station Property 0.0 -----------------1------1 01-08-00 01-05-06 01-03-12 12-31-17 12-29-23 0-03 No samples; power was restored on 07-04-14.
C-26
FIGURE C-12 AIR PARTICULATES - GROSS BETA - STATIONS D-07 and D-12 (C)
COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 120.0 100.0
_§ 80.0 i:3 C.
60.0 q
w 0
T"'
40.0 20.0 D-07 Clay Products, Dresden Road 0.0 -------+------t-------+--------1 M
.§ i3 01-08-00 80.0 60.0
- c. 40.0 M
0 UJ 0.....
20.0 01-05-06 01-03-12 12-31-17 12-29-23 D-12 (C), Quarry Road, Lisbon 0.0...,___----------+--------4------
01-08-00 01-05-06 01-03-12 12-31-17 12-29-23 C-27
FIGURE C-13 AIR PARTICULATES - GROSS BETA - STATIONS D-45 and D-53 COLLECTED IN THE VICINITY OF DNPS, 2000 - 2023 70.0 60.0 M
50.0
.§ u 40.0 Cl.
8 30.0 w
~ 20.0 10.0 D-45 McKinley Woods Road, Channahon 0.0 -----'--'-----+------+------+--------1 01-08-00 50.0 40.0 M
-E 30.0 u
Cl.
M
~ 20.0 0...
10.0 01-05-06 01-03-12 12-31-17 12-29-23 D-53 Will Road, Hollyhock 0.0 __.....__ __ --+------+------+----------4 01-08-00 01-05-06 01-03-12 12-31-17 12-29-23 C-28
FIGURE C-14 AIR PARTICULATES - GROSS BETA-STATIONS D-08 and D-10 COLLECTED IN THE VICINITY OF DNPS, 2005 - 2023 M
70.0 60.0 50.0
.§ U 40.0
- a.
g 30.0 LU 0.....
20.0 10.0 D-08 Jugtown Road, Prairie Parks 0.0 --------------------
01-07-05 60.0 50.0 M
40.0
.§ u
- a. 30.0 M
0 LU 0
20.0 10.0 10-06-09 07-05-14 04-03-19 12-31-23 D-10 Goose Lake Road, Goose Lake Village 0.0......_ __________________
01-07-05 10-06-09 07-05-14 04-03-19 12-31-23 C-29
FIGURE C-15 AIR PARTICULATES - GROSS BETA-STATION D-14 COLLECTED IN THE VICINITY OF DNPS, 2005 - 2023 50.0 40.0 M
.§ 30.0 u
Cl.
M 0 w 20.0 0.....
10.0 D-14 Center Street, Channahon 0.0 ----------------------1 01-07-05 10-06-09 07-05-14 04-03-19 12-31-23 C-30
FIGURE C-16 AIR PARTICULATES - GROSS BETA - STATIONS D-55 and D-56 COLLECTED IN THE VICINITY OF DNPS, 2006 - 2023 70.0 60.0 50.0 M
.§ 40.0 u
C.
M 30.0 0
UJ 0
20.0 10.0 0.0 01-06-06 50.0 40.0 M
.§ 30.0 u
C.
M 0 w 20.0 0...
10.0 D-55 Ridge Road, Minooka 04-06-10 07-05-14 10-03-18 01-01-23 D-56 Will Road, Wildfeather 0.0 +-------------1-----------1 07-25-06 09-03-10 10-13-14 11-22-18 0-55 NEW STATION DECEMBER 30, 2005 REPLACED 0-13 JUNE 29, 2007 0-56 NEW STATION JULY 25, 2006 C-31 01-01-23
FIGURE C-17 AIR PARTICULATES - GROSS BETA - STATION D-58 COLLECTED IN THE VICINITY OF DNPS, 2011 - 2022 60.0 50.0 M
40.0
.§ u
- c. 30.0 M
0 w 0
20.0 10.0 D-58 Will Road Marina 0.0 --------+-----+------
06-03-11 05-03-14 04-02-17 03-02-20 01-31-23 0-58 NEW STATION IN MAY OF 2011 C-32
APPENDIX D INTER-LABORATORY COMPARISON PROGRAM
Intentionally left blank
Analytics Environmental Radioactivity Cross Check Program Table D.1 Teled~ne Brown En51ineerin51 Environmental Services Identification TBE Known Ratio of TBE to Month/Year Number Matrix Nuclide Units Reported Value (a)
Analytics Result Evaluation (b)
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 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 (Page 1 of 2)
Analytics Environmental Radioactivity Cross Check Program Table D.1 Teled:it'.ne Brown En9ineerin9 Environmental Services Identification TBE Known Ratio of TBE to Month/Year Number Matrix Nuclide Units Reported Value (a)
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 (Page 2 of 2)
DOE's Mixed Analyte Performance Evaluation Program (MAPEP)
Table D.2 Teledyne Brown Engineering Environmental Services Identification TBE Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)
Number Value Value (a)
Range February 2023 23-MaS48 Soil Ni-63 Bq/kg 294 1130 791 - 1469 N(3) 23-MaSU48 Urine Cs-134 Bq/L 9.92 10 6.7 - 12.4 A
Cs-137 Bq/L 0.0994 (1)
A Co-57 Bq/L 9.35 8.67 6.07 - 11.27 A
Co-60 Bq/L 9.03 8.13 5.69 - 10.57 A
Mn-54 Bq/L 11.80 10.0 7.0 - 13.0 A
U-234 Bq/L 0.01 Not spiked U-238 Bq/L 0.01 Not spiked Zn-65 Bq/L 10.60 9.29 6.50 - 12.08 A
23-MaW48 Water Ni-63 Bq/L 23.1 27.3 19.1 - 35.5 A
23-RdV48 Vegetation Cs-134 Bq/sample 5.6 7.6 5.32 - 9.88 w
Cs-137 Bq/sample 0.03 (1)
A Co-57 Bq/sample 5.9 6.9 4.85 - 9.01 A
Co-60 Bq/sample 5.00 6.51 4.56 - 8.46 w
Mn-54 Bq/sample 6.08 8.03 5.62 - 10.44 w
Sr-90 Bq/sample 0.05 (1)
N(4)
Zn-65 Bq/sample 5.49 7.43 5.20- 9.66 w
August2023 23-MaS49 Soil Fe-55 Bq/kg 346 1280 896 -1664 N(s)
Ni-63 Bq/kg 1260 1370 959 - 1781 A
23-MaW49 Water Ni-63 Bq/L 1.0 (2)
A 23-RdV49 Vegetation Cs-134 Bq/sample 3.860 4.98 3.49 - 6.47 w
Cs-137 Bq/sample 0.027 (1)
A Co-57 Bq/sample 3.88 4.24 2.97 - 5.51 A
Co-60 Bq/sample 2.37 2.79 1.95 - 3.63 A
Mn-54 Bq/sample 2.04 2.56 1.79 - 3.33 w
Sr-90 Bq/sample 0.96 1.17 0.82 - 1.52 A
Zn-65 Bq/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) DOEIMAPEP 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 (Page 1 of 1)
ERA Environmental Radioactivity Cross Check Program Table D.3 Teledyne Brown Engineering Environmental Services Month/Year Identification Matrix Units TBE Reported Known Acceptance Evaluation (bJ Number Nuclide Value Value<*J 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 Nc1J 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
LI-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 Nc2J GR-B pCi/L 46.9 42.2 30.5 - 53.9 A
LI-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(3J (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 - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 23-10 (2) See NCR 23-20 (3) See NCR 23-21 (Page 1 of 1)
APPENDIX E ERRATA DATA
Intentionally left blank
There was no errata data for 2023.
E-1
Intentionally left blank
APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)
Intentionally left blank
Docket No:
50-010 50-237 50-249 DRESDEN NUCLEAR POWER STATION UNITS 1, 2 and 3 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2023 Prepared By Teledyne Brown Engineering Environmental Services Constellation Dresden Nuclear Power Station Morris, IL 60450 May 2024
Intentionally left blank
Table of Contents I. Summary and Conclusions.*............................................................................................... 1 II. Introduction......................,............................................................................................... 2 A. Objectives of the RGPP............................................. :.......................................... 3 B. Implementation of the Objectives........................................................................... 3 C. Program Description............................................................................................. 4 D. Characteristics of Tritium (H-3).................................................,........................ :.. 4 Ill. Program Description.............................. ;......................................................................... 6 A. Sample Analysis.................................................................................................... 6 B. Data Interpretation................................................................................................. 6 C. Background Analysis.......................................................................................... 7
- 1. Background Concentrations of Tritium....................................................... 7 IV. Results and Discussion...................................................................................... ;............. 9 A. Groundwater Results............................................................................................. 9 B. Surface Water Results........................... ;........................................................... 10 C. Precipitation Water Results................................................................................. 1 O D. Drinking Water Well Survey................................................................................ 1 O E. Summary of Results - Inter-laboratory Comparison Program........................... 1 O F. Leaks, SpiUs, and Releases................................................................................ 10 G. Trends............................................................................................. ;................... 10 H. Investigations...................................................................... :............................... 10 I. Actions Taken......................................................... _.......................... :.................... 11
-i-
Appendices ARGPPR Appendix A Tables Table A-1 Figures ARGPPR Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 Table B-I1.1 Location Designation Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2023 Security-Related Information: Maps of the Dresden Nuclear Power Station have been withheld from public disclosure under 1 0CFR2.390 and N.J.S.A. 47:1A-1.1 Data Tables Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023 Concentrations of Tritium in Precipitation Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2023
- ii -
I.
Summary and Conclusions
- Dresden Station is situated on approximately 600 acres of land that borders the Illinois River to the North and the Kankakee River to the East. This land is referred to as the owner-controlled area. The Dresden power plant itself takes up 'a small parcel of the owner-controlled area and is surrounded by a security fence. the security fence defines what is known as the Protected Area (PA).
The Dresden power plant has experienced leaks from underground lines and spills from systems containing radioactive water over its 50-year history. These incidents have created a number of areas of localized contamination within the PA. The liquid scintillation analyses of groundwater in many of these ar~as show measurable concentrations of tritium (H-3).
Dresden participated in a fleetwide hydrogeologic investigation during the summer of 2006 in an effort to characterize groundwater movement at each site. This investigation also compiled a list of the historic spills and leaks, as well as a detailed analysis on groundwater hydrology for Dresden Nuclear Generation Station. Combining the tritium concentration in a locally contaminated area with the speed and direction of groundwater in the vicinity can prodµce a contaminated groundwater plume projection. If the plume of contaminated groundwater passes through the path of a groundwater monitoring well, it can be anticipated that the tritium concentration in this well will increase to some maximum concentration, then decrease over time.
The fleetwide 5-Year Hydrogeologic Investigation Report (HIR) was generated in 2020 by AECOM. It shows that groundwater movement on the Dresden site is very slow. In addition, there is a confining rock layer, the Maquoketa Shale layer, about 55 feet below the surface that impedes groundwater movement below this depth.
Dresden has a domestic water system that is supplied by two deep wells (1500 feet deep) that were installed about 50 years ago South of the PA. Samples taken from domestic water supply have never shown any detectable tritium concentration.
Tritium has a half-life of 12.3 years. This means that 40 years from now 90% of the tritium on site today will have decayed away to more stable elements. Given the limited volume of contaminated groundwater on site, radioactive decay, slow groundwater movement, and dilution effects, the conclusion of the HIR is that the operation of Dresden Nuclear Power Station has no adverse radiological impact on the environment. As a result, there is little potential for contaminated groundwater on site to affect off-site drinking water.
II.
Introduction Radiological Groundwater Monitoring Program (RGPP):
Dresden has a Radiological Groundwater Monitoring Program (RGPP) that provides long-term monitoring intended to verify the fleet-wide hydrogeologic study conclusions. Dresden uses developed groundwater wells and surface water sample points in the RGPP.
The Dresden RGPP was established in 2006 and there have been no significant changes to this program. This program does not impact the operation of the plant and is independent of the REMP.
Developed groundwater wells are wells that were installed specifically for monitoring groundwater. These wells are equipped with screens and are properly sealed near the surface to avoid surface.water intrusion. The wells were designed in accordance with appropriate codes and developed in accordance with appropriate standards and procedures. Dresden has groundwater monitoring wells identified as "shallow" (depths from 15 to 35 feet), "Intermediate" (depths from 35 to 55 feet) and "deep" (depths beyond 100 feet). Alf wells installed to a depth greate.r than 100 feet ("deep" wells) were found to be dry and removed from the RGPP. Surface water sample points are identified sample locations in the station's canals and cooling pond.
There are 87 sampling points in the RGPP:
Dresden has 49 developed groundwater monitoring wells within the Protected Area (PA). Some of these wells form a ring just inside the security fence and the remaining wells were installed near underground plant system piping that contains radioactive water.
Dresden has 21 developed groundwater monitoring wells outside the PA the majority of which form a ring just within the perimeter of the property.
Dresden has 9 surface water monitoring locations on the owner-controlled area sampled as part of the Dresden RGPP. Three of these locations are monitored for level only and have no analyses in the accompanying tables.
Dresden has 8 precipitation water monitoring locations sampled as part of the Dresden RGPP. An additional 4 locations were studied in 2011 through 2012, but 8 locations are permanently a part of the RGPP program.
Dresden has 1 sentinel well and 2 CST leak detection valves. These 3 sampling points are not constructed to code or developed to a standard. These sampling points are idle and only used for qualitative troubleshooting.
The Dresden site-specific RGPP procedure identifies the historic events that would affect the individual RGPP sample results. This procedure identifies threshold values for each sample point, which if exceeded, could be an indication of a new spill from an above ground system or a new leak in an underground pipe containing tritiated water.
The RGPP sample points are currently sampled on a frequency determined by the well detection category in accordance with site document EN-DR-408-4160, Dresden RGPP Reference Material. During 2023, there were 264 analyses that were performed on 182 samples from 63 sampling points.
Sentinel Wells, sometimes referred to as .baby wells", are wells that were installed to monitor local shallow groundwater; typically associated with an historic underground pipe leak. These wells are not constructed to code or developed to a standard. Most sentinel wells are from 6 to 12 feet deep and
. consist of 2" PVC pipe without screens. These wells are categorized as idle wells and are used only for troubleshooting purposes.
Dresden has two basic storm water runoff sewer systems within the P.A. One storm-system routes to the East, then North and discharges into the Unit 1 intake canal. The second storm-system routes to the West, then North, through a large oil/water separator and discharges to the hot canal. Both the Unit 1
- intake canal and the hot canal eventually route to the cooling pond. The Dresden Station RGPP has twelve RGPP surface water sampling points to monitor these systems.
A.
Objectives of the RGPP The objective of the RGPP is to provide long-term monitoring intended to verify the fleet-wide hydrogeologic study conclusions. The objective of the site-specific RGPP is to provide indication of short-term changes to groundwater tritium concentrations within the PA.
If isotopic results of groundwater samples exceed the thresholds specified in this procedure, it could be an indication of a new spill from an above ground system or a new leak in an underground pipe containing tritiated water.
Specific Objectives include:
- 1.
Perform routine water sampling and radiological analysis of water from selected locations.
- 2.
Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.
- 3.
Regularly assess analytical results to identify adverse trends.
- 4.
Take necessary corrective actions *to protect groundwater resources.
B.
Implementation of the Objectives
- 1.
Dresden Nuclear Power Station will continue to perform routine sampling and radio.logical analysis of water from selected locations.
- 2.
Dresden Nuclear Power Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.
3.. Dresden Nuclear Power Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.
- 4.
If an adverse trend in groundwater monitoring analytica_l results is identified, further investigation will be undertaken. If th_e investigation identifies a leak or unidentified spill, corrective actions will be implemented.
C.
Program Description Dresden has a Radiological Groundwater Monitoring Program (RGPP) that provides long-term monitoring i_ntended to verify the fleet-wide hydrogeologic study conclusions. Dresden uses 89 developed groundwater wells and surface water sample points in the RGPP.
Sample locations can be found in Table A-1, Appendix A. Water samples are collected in accordance with the schedule delineated in the Dresden site-specific RGPP procedures. Analytical laboratories are subject to internal quality assurance programs, industry crosscheck programs, as well as nuclear industry audits. Station personnel review and evaluate the analytical results.
D.
Characteristics of Tritium (H-3)
Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most conimon 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, breathing air, eating food, 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. Similar to 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 (He-3). 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 emits very Weak radiation and leaves the body relatively quickly. 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.
111.
Program Description A.
Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineering (TBE) to analyze the environmental samples for radioactivity for the Dresden Nuclear Power Station RGPP in 2023.
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 and precipitation water.
- 4.
Concentrations of gross alpha 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-233/234, 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 Dresden Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Dresden Nuclear Power 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 the 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 uncertainty and other factors. Constellation Energy, LLC 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 Energy, LLC 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.
When required, gamma spectroscopy includes the following 14 nuclides: 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 and La-140.
C.
Background Analysis A pre-operational radiological environmental monitoring program (pre-operational 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, marine life, and food stuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Dresden Nuclear Power Nuclear Power Station, Commonwealth Edison Company, Annual Report 1986, May 1987.
- 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 9f 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.
- b.
Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium a'nd other radionuclides. Two publicly available databases that provide tritium concentrations in predpitation 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 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.
Tritium concentrations in wells may still be above the 200-pCi/L detection limit from the external causes described above. Water from previous years 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.
The radio-analytical laboratory counts tritium results to an Constellation Energy, LLC 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. These sample results cannot be distinguished as different from background at this concentration.
IV.
Results and Discussion Dresden Station initiated a Radiological Groundwater Protection Program (RGPP) in 2006.
A.
Groundwater Results Samples were collected from on-site wells throughout the year in accordance with Dresden's RGPP. Analytical results and anomalies are discussed below:
Tritium Following historic ground tritium-contamination events at Dresden Station routine sampling and analyses continue, both inside and outs.ide the protected area, in accordance with site procedure EN-DR-408-4160, Dresden Station RGPP Reference Material.
Low level tritium was detected from January through December 2023 in several sampling and testing locations (Table B-1.1, Appendix B);
however, overall tritium concentrations have been trending down.
The vast majority of these locations showed a range of tritium contamination from LLD to values less than 20,000 pCi/L.
It is important to note that in prior years, wells that exceeded the United States Environmental Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L were due to the 2014 2/3B CST Leak. The exceedances are located within Station property, and do not serve as a drinking water source.
Strontium Samples were collected and analyzed for Sr-89 and Sr-90 activity (Table B-1.1, Appendix B). Sr-89 was not detected in any of the samples. Sr-90 was detected in 1 sample at location MW-DN-105S with a concentration of 3.1 +/- 0. 7 pCi/L and 1 sample at location DSP 108 with a concentration of 2.7 +/- 0.7 pCi/L Gross Alpha (dissolved and suspended)
Gross Alpha in the dissolved and suspended fractions were performed on groundwater samples during the second quarter of 2023 (Table B-1.1, Appendix B). Gross Alpha (dissolved) was detected in 1 sample at a concentration of 8.1 +/- 0.7 pCi/L. Gross Alpha (suspended) was detected in 5 groundwater locations with concentrations ranging from 1.8 to 21.1 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.
Gamma Emitters Naturally-occurring K-40 (potassium-40) was detected in 9 locations with concentrations ranging from 40 to 336 pCi/L. No other gamma-emitting nuclides were detected in any sample. (Table B-1.2, Appendix B).
Hard-To-Detects Hard-To-Detect analyses were performed on 3 groundwater locations.
The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-233/234, U-235 and U-238. No hard-to-detect nuclides were detected at concentrations greater than their respective MDCs. (Table B-1.3, Appendix B).
B.
Surface Water Results No surface water samples were collected in 2023.
C.
Precipitation Water Results Precipitation Water Samples were collected from 8 precipitation water locations throughout the year in accordance with the station radiological groundwater protection progr~m. Analytical results and anomalies are discussed below.
Tritium Samples from 8 locations were analyzed for tritium activity. Tritium was detected in 10 of 15 samples from 5 locations. The concentrations ranged from 212 to 914 pCi/L. (Table B-I1.1, Appendix B).
D.
Drinking Water Well Survey No drinking water well surveys were conducted in 2023.
E.
Summary of Results - Inter-Laboratory C.omparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.
F.
Leaks, Spills, and Releases No leaks, spills, and releases occurred in 2023.
G.
Trends Overall, tritium concentrations are decreasing across the Station. The Station continued to implement the tritium monitoring plan with monthly/quarterly sampling of a subset of shallow and intermediate aquifer wells, sewage treatment plant water, and storm sewer water.
An elevated concentration persists in the area of the Condensate Storage Tanks (Event 20 in EN-DR-408-4160, Revision 6, Attachment 3). As of December 2015, active remediation was implemented. Two remediation wells were installed in August 2015; however, the West remediation well is capable of enough recharge for active remediation.
Investigations No investigations performed in 2023.
I.
Actions Taken 1. Compensatory Actions None.
- 2.
Actions to Recover/Reverse Plumes None.
Intentionally left blank
APPENDIX A LOCATION DESIGNATIONS
Intentionally left blank
TABLE A-1:
Radiological Groundwater Protection Program - Sampling Locations, Dresden Nuclear Power Station, 2023 Site CBG Domestic Water North Well Domestic Water South Well DSP-105 DSP-106 DSP-107 DSP-108 DSP-122 DSP-123 DSP-124 DSP-125 DSP-126 DSP-131 DSP-132 DSP-133 DSP-147 DSP-148 DSP-149R DSP-150 DSP-151 DSP-154 DSP-156 DSP-157-M DSP-157-S DSP-159-M DSP-159-S FW-1 FW-2 FW-3 FW-4 FW-5 FW-10 FW-11 FW-12 MD-11 MW-DN-101-I MW-DN-101-S MW-DN-102-S MW-DN-103-I MW-DN-103-S MW-DN-104-S MW-DN-105-S MW-DN-107-S Site Type Location Monitoring Well 150 feet west of the P.A.F., just south of security fence Monitoring Well 200 feet west of old vehicle checkpoint, 100 feet east of hot canal Monitoring Well 30 feet east of east wall of EM Shop Monitoring Well 65 feet east of east wall of EM Shop Monitoring Well 9 feet east of the east Unit 1 Fuel Pool wall Monitoring Well 40 ft east of the Unit 1 Sphere Monitoring Well 50 feet north of the Radwaste Tank Farm Monitoring Well Northeast corner of the Unit 1 Off-gas Building Monitoring Well 9 feet south of Floor Drain Collector Tank Monitoring Well Northeast corner of the Unit 2/3A CST Monitoring Well 21 feet northwest of the northwest bend in road behind Training Building Monitoring Well 35 feet NE of U2/3 Heating Boiler 150k gallon diesel tank Monitoring Well 150 feet NE of U1 Sphere; sewer in middle of road with solid cover Monitoring Well Ditch that runs N of PAF easterly to Kankakee River; sample at side access W of PA Monitoring Well 325 feet west of Telemetry Bridge Monitoring Well 130 feet southeast of the Flow_ Regulating Station building Monitoring Well 35 feet south by southwest of the 138 KV yard fence Monitoring Well 85 feet east of the northeast corner of the Unit 1 Spent Fuel Pool pad Monitoring Well 65 feet N of NE corner of Storeroom Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well 33 feet west of the track; 165 feet east of the Security Checkpoint 70 feet E-NE of NW corner of 138 KV fence 25 feet S of S edge of employee parking lot 25 feet S of S edge of employee parking lot 250 feet west of the Thorsen house; 450 ft south of the plant access gate 251 feet west of the Thorsen house; 450 ft south of the plant access gate 40 feet southwest of Unit 2/3 Off-gas Filter Building access door; north end of guardrail 15 feet south of the U 2/3 Intake Canal 100 feet north of the security fence, north part of switchyard 10 feet east of the U 2/3 Trackway, adjacent to the TB south wall 20 feet west of the concrete be on the north side of the gravel before ii forks At the fence at the northwest corner of the SBO Building 30 feet east of the east wall of the EM shop; at the stanchion for RGPP well DSP-105 60 feet southeast of the southwest corner of the Admin Building; on the security fence Piping located between Condensate Storage Tanks.
60 feet north of the Unit 1 Diesel Fuel Storage 60 feet north of the Unit 1 Diesel Fuel Storage 13 feet south of the southeast corner of the MUDS Building 280 feet west of the northwest corner of N-GET Building, 50 feet S of S PA fence 281 feet west of the northwest corner of N-GET Building, 50 feet S of SPA fense 50 feet north of Radwaste Tank Farm 65 feet north of the northeast corner of the Storeroom 15 feet west by southwest of the Unit 1 CST A-1
TABLE A-1:
Site MW-DN-109-I MW-DN-109-S MW-DN-110-S MW-DN-111-S MW-DN-112-I MW-DN-112-S MW-DN-113-S MW-DN-114-I MW-DN-114-S MW-DN-115-I MW-DN-115-S MW-DN-116-I MW-DN-116-S MW-DN-118-S MW-DN-119-I MW-DN-119-S MW-DN-122-I MW-DN-122-S MW-DN-124-I MW-DN-124-S MW-DN-125-S MW-DN-126-S MW-DN-127-S MW-DN-134-S MW-DN-135-S MW-DN-136-S MW-DN-137-S MW-DN-140-S MW-DN-141-S MW-DN-142-S MW-DN-143-S MW-DN-144-S RW-DN-100-S RW-DN-101-S Radiological Groundwater Protection Program - Sampling Locations, Dresden Nuclear Power Station, 2023 Site Type Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Recovery Well Recovery Well Location 8 feet north of Chemistry Building 8 feet north of Chemistry Building 25 feet west of the Waste Water Treatment 0,NWT) Building 9 feet east of the Floor Drain Collector Tank 100 feet south of the Chemistry Building 100 feet south of the Chemistry Building 91 feet west of the southwest corner of the Administration Building 50 feet east of the Unit 1 Clean Demineralized Water Tank 8 feet southwest of the Radiation protection Dept west access doors 11 feet south of Instrument Maintenance Shop 12 feet south of Instrument Maintenance Shop 75 feet south of the Calgon Building roll-up door 75 feet south of the Calgon Building roll-up door Southeast corner of the Unit 1 Fuel Pool 20 feet east by northeast of the Unit 1 Sewage Ejector Building 21 feet east by northeast of the Unit 1 Sewage Ejector Building 150 feet north of Collins Road; northeast of the G.E. Fuel Storage Facility 150 feet north of Collins Road; northeast of the G.E. Fuel Storage Facility 11 feet south of the liquid nitrogen tanks 12 feet south of the liquid nitrogen tanks 40 feet east of 2/3 B CST 15 feet south of fence around Unit 2/3 A CST and B CST (outside of fence) 20 feet south of Unit 3 HRSS 20 feet North of Mausoleum Building 20 feet East of Mausoleum Building 14.5 feet South of Mausoleum Building 20 feet West of Mausoleum Building East of MW-DN-104S at SW corner outside of 2/3 crib house North of 'A' Waste Tank next to 2/3 main chimney 338 feet NW of Mausoleum Building 408 feet NW of Mausoleum Building 458 feet NW of Mausoleum Building 50 feet W of MD-11 50 feet E of MD-11 A-2
APPENDIX B.
DATA TABLES
Intentionally left blank
TABLE 8-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 CBG 03/15/23 638 +/- 144 CBG 06/21/23 681 +/- 157 CBG 09/21/23 1210 +/- 197 CBG 12/05/23 350 +/- 134 DSP-106 03/16/23 1020 +/- 182 DSP-106 06/21/23 989 +/- 181
< 5.8
< 0.7
< 2.2
< 0.3 DSP-106 09/21/23 1070 +/- 179 DSP-106 12/07/23 885 +/- 170 DSP-107 03/16/23 1520 +/- 231 DSP-107 06/22/23 1300 +/- 210
< 7.4
< 0.9
< 2.1
< 0.3 DSP-107 09/21/23 1320 +/- 201 DSP-107 12/07/23 1280 +/- 207 DSP-108 03/16/23 212 +/- 136 DSP-108 06/22/23 223 +/- 129
< 9.4 2.7 +/- 0.7
< 3.7
< 0.4 DSP-108 09/21/23 273 +/- 125 DSP-108 12/07/23 274 +/- 131 DSP-122 03/16/23 1720 +/- 246 DSP-122 06/22/23 802 +/- 159
< 3.3
< 0.5
< 4.3 3.6 +/- 1.4 DSP-122 09/22/23 1250 +/- 198 DSP-122 12/06/23 1680 +/- 241 DSP-123 03/16/23
< 196 DSP-123 06/22/23
< 183
< 5.2
< 0.8
< 11.4
< 1.7 DSP-123 09/22/23
< 185 DSP-123 12/07/23
< 191 DSP-124 03/14/23 345 +/- 139 DSP-124 06/20/23
< 185
< 4.2
< 0.7
< 5.6
< 0.9 DSP-124 09/20/23 187 +/- 120 DSP-124 12/06/23 206 +/- 126 DSP-125 03/15/23
< 186 DSP-125 06/20/23
< 180
< 7.0
< 0.7
< 11.4
< 1.8 DSP-125 09/19/23
< 180 DSP-125 12/05/23
< 195 DSP-126 06/19/23
< 183 DSP-147 06/20/23
< 183 DSP-148 06/19/23 192 +/- 120 DSP-149 06/19/23 391 +/- 126 DSP-150 06/21/23
< 182 DSP-154 06/19/23
< 180 DSP-159-M 06/20/23 217 +/- 121 DSP-159-S 06/20/23
< 183 MD-11 03/15/23 12700 +/- 1330 MD-11 06/20/23 8140 +/- 880
< 6.5
< 0.8
< 1.2
< 0.6 MD-11 09/19/23 6320 +/- 695 MD-11 12/05/23 4330 +/- 504 MW-DN-101-I 03/16/23 275 +/- 126 MW-DN-101-I 06/22/23 269 +/- 123
< 5.2
< 0.7
< 3.6
< 0.3 MW-DN-101-I 09/21 /23 279 +/- 125 MW-DN-101-I 12/07/23
< 193 MW-DN-101-S 03/16/23
< 187 MW-DN-101-S 06/22/23
< 181
< 6.8
< 0.8
< 1.8 1.8 +/- 0.8 MW-DN-101-S 09/21/23
< 184 MW-DN-101-S 12/07/23
< 193 MW-DN-102-S 06/20/23
< 185 B-1 BOLD values= Unable to meet detection limit due to high solids content
TABLE 8-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 MW-DN-103-I 06/20/23
< 184 MW-DN-103-S 06/20/23
< 183 MW-DN-104-S 03/16/23
< 184 MW-DN-104-S 06/22/23
< 184
< 2.6
< 0.6
< 9.2
< 6.1 MW-DN-104-S 09/22/23 511 +/- 138 MW-DN-104-S 12/06/23 307 +/- 132 MW-DN-105-S 03/16/23
< 182 MW-DN-105-S 06/21/23
< 184
< 8.9 3.1 +/- 0.7
< 4.6 10.1 +/- 3.0 MW-DN-105-S 09/21/23
< 185 MW-DN-105-S 12/07/23
< 192 MW-DN-107-S 03/15/23
< 190 MW-DN-107-S 06/23/23
< 182
< 7.0
< 0.8
< 1.5
< 2.0 MW-DN-107-S 09/21/23 323 +/- 127 MW-DN-107-S 12/06/23
< 195 MW-DN-109-I 03/14/23 212 +/- 121 MW-DN-109-I 06/19/23
< 199
< 6.4
< 0.5
< 5.1
< 1.5 MW-DN-109-I 09/21/23 335 +/- 129 MW-DN-109-I 12/06/23 205 +/- 126 MW-DN-109-S 03/14/23
< 185 MW-DN-109-S 06/19/23
< 193
< 9.1
< 0.9
< 9.2
< 3.0 MW-DN-109-S 09/21/23
< 183 MW-DN-109-S 12/06/23
< 190 MW-DN-110-S 06/19/23 234 +/- 133 MW-DN-111-S 02/08/23 5170 +/- 586 MW-DN-111-S 03/14/23 7380 +/- 797 MW-DN-111-S 06/20/23 5380 +/- 607
< 8.5
< 0.8
< 1.1
< 0.6 MW-DN-111-S 09/20/23 7240 +/- 781 MW-DN-111-S 12/06/23 6280 +/- 691 MW-DN-112-I 06/20/23
< 193 MW-DN-112-I 12/06/23 373 +/- 131 MW-DN-112-S 06/20/23
< 197 MW-DN-113-S 06/23/23
< 197 MW-DN-114-I 06/21/23 2170 +/- 294 MW-DN-114-I 12/06/23 1770 +/- 251 MW-DN-114-S 03/15/23 1150 +/- 188 MW-DN-114-S 06/21/23 1400 +/- 216
< 8.4
< 0.9
< 2.3
< 0.6 MW-DN-114-S 09/21/23 1030 +/- 177 MW-DN-114-S 12/06/23
< 193 MW-DN-115-I 06/21/23 239 +/- 124 MW-DN-115-I 12/05/23 429 +/- 142 MW-DN-115-S 03/15/23
< 181 MW-DN-115-S 06/21/23
< 187
< 8.7
< 0.8
< 2.8
< 0.6 MW-DN-115-S 09/21/23 187 +/- 119 MW-DN-115-S 12/05/23
< 194 MW-DN-116-I 06/22/23 504 +/- 138 MW-DN-116-S 03/16/23
< 179 MW-DN-116-S 06/22/23
< 186
< 5.2
< 0.9
< 2.8
< 0.6 MW-DN-116-S 09/22/23
< 187 MW-DN-116-S 12/07/23
< 196 MW-DN-118-S 03/16/23
< 181 MW-DN-118-S 06/21/23
< 188
< 3.7
< 0.3
< 4.0
< 0.6 MW-DN-118-S 09/21/23
< 183 MW-DN-118-S 12/07/23
< 196 B-2 BOLD values= Unable to meet detection limit due to high solids content
TABLE 8-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RES UL TS IN UNITS OF PC I/LITER+/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Disl Gr-A (Susi MW-DN-119-I 03/16/23
< 180 MW-DN-119-I 06/22/23
< 186
< 7.7
< 1.0
< 4.0
< 1.2 MW-DN-119-I 09/21/23
< 183 MW-DN-119-I 12/07/23
< 193 MW-DN-119-S 03/16/23
< 181 MW-DN-119-S 06/22/23
< 185
< 8.8
< 0.9
< 2.9
< 0.6 MW-DN-119-S 09/21/23
< 188 MW-DN-119-S 12/07/23
< 200 MW-DN-122-I 06/20/23
< 187 MW-DN-122-S 06/20/23
< 189 MW-DN-124-I 03/15/23 3100 +/- 375 MW-DN-124-I 06/21/23 290 +/- 128
< 8.4
< 0.8
< 1.1
< 0.6 MW-DN-124-I 09/20/23 713 +/- 154 MW-DN-124-I 12/06/23 390 +/- 136 MW-DN-124-S 03/15/23
< 185 MW-DN-124-S 06/21/23 330 +/- 135
< 9.5
< 1.0
< 2.8
< 0.9 MW-DN-124-S 09/20/23 458 +/- 131 MW-DN-124-S 12/06/23 289 +/- 132 MW-DN-125-S 06/23/23
< 194 MW-DN-125-S 12/06/23
< 194 MW-DN-126-S 03/15/23
< 187 MW-DN-126-S 06/20/23
< 197
< 7.4
< 0.9
< 2.2 2.3 +/- 1.1 MW-DN-126-S 09/20/23
< 182 MW-DN-126-S 12/05/23
< 196 MW-DN-127-S 06/21/23
< 193 MW-DN-127-S 12/05/23
< 196 MW-DN-134-S 06/20/23
< 192 MW-DN-135-S 06/20/23
< 199 MW-DN-136-S 03/17/23
< 177 MW-DN-136-S 06/20/23
< 196
< 7.8
< 0.9 8.1 +/- 5.3
< 3.0 MW-DN-136-S 09/20/23
< 184 MW-DN-136-S 12/04/23
< 198 MW-DN-137-S 06/20/23
< 195 MW-DN-140-S 03/16/23
< 178 MW-DN-140-S 06/22/23
< 197
< 7.8
< 0.9
< 2.6
< 1.2 MW-DN-140-S 09/22/23
< 186 MW-DN-140-S 12/07/23
< 195 MW-DN-141-S 02/08/23 4870 +/- 554 MW-DN-141-S 03/15/23 3760 +/- 443 MW-DN-141-S 06/22/23 4720 +/- 538
< 7.9
< 0.8
< 1.9
< 0.6 MW-DN-141-S 09/22/23 618 +/- 145 MW-DN-141-S 12/06/23 3140 +/- 382 MW-DN-142-S 06/20/23
< 194 MW-DN-143-S 06/20/23
< 197 MW-DN-144-S 06/20/23
< 196 RW-DN-100-S 03/15/23 880 +/- 165 RW-DN-100-S 06/21/23 1000 +/- 182
< 8.0
< 0.8
< 6.3 21.1 +/- 5.6 RW-DN-100-S 09/20/23 1430 +/- 218 RW-DN-100-S 12/05/23 1200 +/- 198 RW-DN-101-S 03/15/23 1990 +/- 266 RW-DN-101-S 06/21/23 241 +/- 127
< 8.4 0.8
< 5.5
< 1.2 RW-DN-101-S 09/20/23 19000 +/- 1960 RW-DN-101-S 12/05/23 1200 +/- 202 B-3 BOLD values= Unable to meet detection limit due to high solids content
TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RES UL TS 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 CBG 06/21/23
< 19 73 +/- 43
< 2
< 2
< 5
< 3
<4
< 2
<4
< 8
< 2
< 2
< 17
< 6 DSP-106 06/21/23
< 12 63 +/- 21
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 9
< 1
< 1
< 14
< 5 DSP-107 06/22/23
< 13
< 27
< 1
< 1
< 3
< 2
< 3
< 1
< 2
< 9
< 1
< 1
< 15
<4 DSP-108 06/22/23
< 13
< 11
< 1
< 1
<4
< 1
< 2
< 1
< 2
< 9
< 1
< 1
< 14
<4 DSP-122 06/22/23
< 13 50 +/- 22
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 9
< 1
< 1
< 15
< 5 DSP-123 06/22/23
< 14
< 13
< 1
< 2
< 3
< 2
< 3
< 2
< 3
< 10
< 1
< 1
< 15
< 6 DSP-124 06/20/23
< 13
< 11
< 1
< 1
< 3
< 1
< 2
< 2
< 3
< 9
< 1
< 1
< 14
< 5 DSP-125 06/20/23
< 13
< 30
< 1
< 1
< 3
< 1
< 3
< 2
< 3
< 8
< 1
< 1
< 15
<4 DSP-126 06/19/23
< 16
< 17
< 2
< 2
<4
< 2
< 3
< 2
< 3
< 8
<2
< 2
< 14
<6 DSP-147 06/20/23
< 17
< 40
< 2
< 2
< 4
< 2
< 3
< 2
< 3
< 8
< 2
< 2
< 14
<4 DSP-148 06/19/23
< 15
< 13
< 1
< 2
<4
< 2
< 3
< 2
< 3
< 8
< 2
< 1
< 14
< 5 DSP-149 06/19/23
< 15
< 13
< 1
< 2
< 4
< 2
< 3
< 2
< 3
< 7
< 2
< 1
< 15
< 5 DSP-150 06/21/23
< 13
< 11
< 1
< 1
< 3
< 1
< 3
< 2
< 2
< 9
< 1
< 1
< 14
<5 DSP-154 06/19/23
< 13 41 +/- 25
< 1
< 1
<4
< 2
< 3
< 1
< 3
< 7
<2
< 1
< 13
<5 co DSP-159-M 06/20/23
< 14
< 15
< 1
< 1
< 3
< 2
< 3
< 2
< 3
< 9
< 1
< 1
< 14
< 5 I
DSP-159-S 06/20/23
< 13
< 26
< 1
< 1
< 3
< 1
< 2
< 1
< 3
< 10
< 1
< 1
< 15
< 5
~
MD-11 06/20/23
< 16
< 40
< 2
<2
< 4
<2
< 3
< 2
< 3
< 7
<2
< 2
< 15
<4 MW-DN-101-I 06/22/23
< 13 76 +/- 25
< 1
< 2
< 3
< 1
< 3
< 1
< 2
< 9
< 1
< 1
< 15
<5 MW-DN-101-S 06/22/23
< 13
< 13
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 11
< 1
< 1
< 15
< 5 MW-DN-102-S 06/20/23
< 13
< 12
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 9
< 1
< 1
< 15
< 5 MW-DN-103-I 06/20/23
< 13
< 32
< 1
< 1
< 3
< 2
< 2
< 1
< 2
< 10
< 1
< 1
< 15
< 5 MW-DN-103-S 06/20/23
< 14
< 23
< 1
< 1
<4
< 1
< 2
< 2
< 3
< 9
< 1
< 1
< 15
< 6 MW-DN-104-S 06/22/23
< 13 50 +/- 26
< 1
< 1
< 3
< 1
< 3
< 1
< 3
< 9
< 1
< 1
< 15
<4 MW-DN-105-S 06/21/23
< 13
< 24
< 1
< 1
< 3
< 1
< 3
< 1
< 3
< 9
< 1
< 1
< 14
<4 MW-DN-107-S 06/23/23
< 18
< 18
< 2
< 2
<4
< 2
< 3
< 2
<4
< 6
< 2
< 2
< 15
< 5 MW-DN-109-I 06/19/23
< 15
< 13
< 1
< 2
<4
< 2
< 3
< 2
< 3
< 7
< 2
< 2
< 14
< 5 MW-DN-109-S 06/19/23
< 14
< 30
< 1
< 2
<4
< 2
< 3
< 2
< 3
< 7
< 2
< 1
< 13
< 4 MW-DN-110-S 06/19/23
< 15
< 12
< 1
< 2
< 3
< 2
< 3
< 2
< 3
< 9
< 2
< 1
< 15
<4 MW-DN-111-S 06/20/23
< 15 47 +/- 28
< 1
< 1
< 3
< 2
< 3
< 1
< 2
< 8
< 1
< 1
< 14
< 5 MW-DN-112-I 06/20/23
< 12 40 +/- 25
< 1
< 1
< 3
< 1
<2
< 1
< 2
< 9
< 1
< 1
< 14
< 5 MW-DN-112-S 06/20/23
< 13
< 12
< 1
< 1
< 3
< 1
< 3
< 2
< 3
< 9
< 1
< 1
< 14
< 5 MW-DN-113-S 06/23/23
< 31 336 +/- 70
< 3
< 3
<6
<4
< 5
< 3
< 5
< 9
<4
< 3
< 20
< 6 MW-DN-114-I 06/21/23
< 12
< 12
< 1
< 2
< 3
<2
< 2
< 1
< 3
< 8
< 2
< 2
< 15
< 4 MW-DN-114-S 06/21/23
< 14
< 11
< 1
< 2
< 3
< 1
<.2
< 2
< 3
< 9
< 1
< 1
< 14
<4 BOLD values= Unable to meet detection limit due to high solids content
TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER 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 MW-DN-115-I 06/21/23
< 13
< 14
< 1
< 1
< 3
< 1
< 3
< 1
< 2
< 9
< 1
< 1
< 14
< 5 MW-DN-115-S 06/21/23
< 13
< 13
< 1
< 1
< 3.
< 1
< 3
< 1
< 3
< 9
< 1
< 1
< 14
< 5 MW-DN-116-I 06/22/23
< 13
< 31
< 1
< 1
< 3
< 1
< 2
<2
< 2
< 10
< 1
< 1
< 14
<4 MW-DN-116-S 06/22/23
< 12
< 11
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 8
< 1
< 1
< 14
<4 MW-DN-118-S 06/21/23
< 14
< 26
< 1
< 2
<4
< 1
< 3
< 2
< 3
< 8
< 1
< 1
< 15
< 5 MW-DN-119-I 06/22/23
< 15
< 33
< 1
< 1
< 3
< 1
< 3
< 2
< 3
< 10
< 1
< 1
< 15
< 5 MW-DN-119-S 06/22/23
< 13
< 11
< 1
< 1
< 3
< 1
< 2
< 1
< 3
< 8
< 1
< 1
< 15
<4 MW-DN-122-I 06/20/23
< 17
< 15
< 2
< 2
<4
<2
<4
<2
< 3
< 8
< 2
< 2
< 15
< 5 MW-DN-122-S 06/20/23
< 15
< 37
< 2
< 1
<4
<2
< 3
< 2
< 3
< 8
< 2
< 2
< 15
<4 MW-DN-124-I 06/21/23
< 17
< 31
< 2
< 2
< 5
< 2
< 4
< 2
< 3
< 7
< 2
< 2
< 15
< 5 MW-DN-124-S 06/21/23
< 19
< 39
<2
< 2
<4
<2
< 4
<2
< 3
< 8
< 2
< 2
< 15
< 5 MW-DN-125-S 06/23/23
< 13
< 10
< 1
< 1
< 3
<2
< 2
< 1
< 2
< 8
< 1
< 1
< 14
<4 MW-DN-126-S 06/20/23
< 13
< 29
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 10
< 1
< 1
< 15
<4 MW-DN-127-S 06/21/23
< 16
< 12
< 1
< 2
< 3
< 2
< 3
< 1
< 3
< 9
< 1
< 1
< 14
< 5 OJ MW-DN-134-S 06/20/23
< 12
< 22
< 1
< 1
< 3
< 1
< 3
< 1
< 3
< 8
< 1
< 1
< 14
< 5 I
MW-DN-135-S 06/20/23
< 13
< 31
< 1
< 1
< 3
<2
< 2
< 1
< 3
< 8
< 1
< 1
< 15
<4 01 MW-DN-136-S 06/20/23
< 14
< 11
< 1
< 1
< 3
< 2
< 2
< 2
< 2
< 8
< 1
< 1
< 14
< 5 MW-DN-137-S 06/20/23
< 13
< 13
< 1
< 2
< 3
< 2
< 3
< 2
< 3
< 8
< 2
< 1
< 15
< 5 MW-DN-140-S 06/22/23
< 12
< 13
< 1
< 1
< 3
< 1
< 3
< 1
< 2
< 8
< 1
< 1
< 14
< 3 MW-DN-141-S 06/22/23
< 13
< 35
< 1
< 1
<4
< 2
< 3
< 2
< 2
< 9
< 1
< 1
< 15
<4 MW-DN-142-S 06/20/23
< 12
< 11
< 1
< 1
< 3
< 1
<2
< 1
< 2
< 9
< 1
< 1
< 15
<4 MW-DN-143-S 06/20/23
< 13
< 13
< 1
< 2
<4
< 1
< 2
< 1
< 3
< 8
< 1
< 1
< 15
< 5 MW-DN-144-S 06/20/23
< 13
< 10
< 1
< 1
< 3
< 1
< 3
< 1
< 2
< 7
< 1
< 1
< 14
< 5 RW-DN-100-S 06/21/23
< 14
< 11
< 1
< 1
< 3
< 1
< 3
< 2
< 3
< 9
< 2
< 1
< 15
<4 RW-DN-101-S 06/21/23
< 13
< 27
< 1
< 1
< 3
< 1
< 2
< 1
< 2
< 9
< 1
< 1
< 15
< 5
TABLE B-1.3 CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RES UL TS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-233/234 U-235 U-238 Fe-55 Ni-63 DSP-107 06/22/23
< 163
< 4.6 DSP-108 06/22/23
< 65
< 4.7 DSP-123 06/22/23
< 76
< 4.2 MD-11 06/20/23
< 0.04
< 0.12
< 0.04
< 0.19
< 0.14
< 0.07
< 0.03
< 0.06
< 100
< 4.6 MW-DN-101-I 06/22/23
< 152
< 4.1 MW-DN-101-S 06/22/23
< 182
< 4.8 MW-DN-105-S 06/21/23
< 125
< 4.7 MW-DN-116-S 06/22/23
< 116
< 4.8 MW-DN-119-I 06/22/23
< 117
< 4.4 MW-DN-119-S 06/22/23
< 87
< 4.6 MW-DN-124-I 06/21/23
< 0.13
< 0.16
< 0.05
< 0.13
< 0.04
< 0.15
< 0.10
< 0.15
< 98
< 4.1 MW-DN-124-S 06/21/23
< 0.19
< 0.05
< 0.12
< 0.12
< 0.20
< 0.08
< 0.16
< 0.18
< 90
< 4.7 CJ I
O")
TABLE B-I1.1 CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2023 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION DIRECTIONAL SITE DATE SECTOR H-3 Qual FW-1 03/15/23 NW 332 +/- 138
+
FW-1 09/22/23 NW 369 +/- 132
+
FW-1 12/06/23 NW 619 +/- 150
+
FW-2 03/15/23 NNE 218 +/- 135
+
FW-2 09/22/23 NNE
< 189 u
FW-2 12/07/23 NNE 524 +/- 139
+
FW-3 03/15/23 NNW 422 +/- 134
+
FW-3 09/22/23 NNW
< 188 u
FW-3 12/07/23 NNW 914 +/- 176
+
FW-4 03/15/23 SW 212 +/- 131
+
FW-4 09/20/23 SW 264 +/- 132
+
FW-4 12/06/23 SW
< 191 u
FW-5 03/15/23 NE
< 198 u
FW-5 09/18/23 NE
< 197 u
FW-5 12/05/23 NE
< 190 u
FW-10 03/15/23 E
< 196 u
FW-10 09/21/23 E
< 198 u
FW-10 12/07/23 E
< 184 u
FW-11 03/16/23 ESE
< 193 u
FW-11 09/21/23 ESE
< 195 u
FW-11 12/07/23 ESE
< 189 u
FW-12 03/15/23 SSE 281 +/- 145
+
FW-12 09/21/23 SSE
< 197 u
FW-12 12/07/23 SSE
< 191 u
Explanation:
U - Tritium not detected at a concentration greater than the laboratory detection limit.
+ - Tritium detected at a concentration greater than the laboratory detection limit.
B-7
Intentionally left blank