Text

Annual Radiological Environmental Operating Report for Cy 2022
	ML23132A203
Person / Time
Site:	Quad Cities
Issue date:	05/31/2023
From:	; Constellation Energy Generation, Teledyne Brown Engineering Environmental Services
To:	; Office of Nuclear Reactor Regulation
Shared Package
ML23132A201	List: ML23132A202; ML23132A203; ML23132A204; SVP-23-022, Correction/Errata for the 2022 Annual Radioactive Effluent Release Report;
References
	SVP-23-022
	Download: ML23132A203 (1)
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Docket No: 50-254 50-265 QUAD CITIES NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2022 Prepared By Teledyne Brown Engineering Environmental Services Quad Cities Nuclear Power Station Cordova, IL 61242 May 2023

Intentionally left blank Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction...................................................................................................................... 3 A. Ojectives of the REMP......................................................................................... 3 B. Implementation of the Objectives ........................................................................ 3 C. Radiation and Radioactivity ................................................................................. 3 D. Sources of Radiation ........................................................................................... 4 III. Program Description....................................................................................................... 6 A. Sample Collection ................................................................................................ 6 B. Sample Analysis .................................................................................................. 7 C. Data Interpretation ............................................................................................... 8 D. Program Exceptions ............................................................................................ 9 E. Program Changes ............................................................................................. 10 IV. Results and Discussion ............................................................................................... 11 A. Aquatic Environment ......................................................................................... 11

1. Surface Water ......................................................................................... 11

2. Ground Water ......................................................................................... 11

3. Fish ......................................................................................................... 12

4. Sediment ................................................................................................. 12 B. Atmospheric Environment ................................................................................. 12

1. Airborne .................................................................................................. 12

a. Air Particulates ............................................................................. 12

b. Airborne Iodine............................................................................. 13

2. Terrestrial ................................................................................................ 13

a. Milk............................................................................................... 13

b. Food Products.............................................................................. 13 C. Ambient Gamma Radiation ............................................................................... 14 D. Independent Spent Fuel Storage ...................................................................... 14 E. Land Use Survey ............................................................................................... 14 F. Errata Data......................................................................................................... 15 G. Summary of Results - Inter-laboratory Comparison Program .......................... 15 i

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for Quad Cities Nuclear Power Station, 2022 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2022 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Quad Cities Nuclear Power Station, 2022 Figures Figure B-1 Quad Cities REMP Sampling Locations - 2 Mile Radius, 2022 Figure B-2 Quad Cities REMP Sampling Locations - 9.3 Mile Radius, 2022 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-I.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-I.2 Concentrations of Tritium, Iron-55 and Nickel-63 in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-I.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-II.1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-II.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 ii

Table C-III.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations In Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-VI.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-VII.1 Concentrations of I-131 in Milk Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-VIII.1 Concentrations of Gamma Emitters in Food Product Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table C-IX.1 Quarterly DLR Results for Quad Cities Nuclear Power Station, 2022 Table C-IX.2 Annual DLR Results Quad Cities Nuclear Power Station, 2022 Figures Figure C-1 Surface Water - Gross Beta - Stations Q-33 and Q-34 (C) Collected in the Vicinity of QCNPS, 2000 - 2022 Figure C-2 Surface Water - Tritium - Stations Q-33 and Q-34 (C) Collected in the Vicinity of QCNPS, 2000 - 2022 Figure C-3 Ground Water - Tritium - Stations Q-35 and Q-36 Collected in the Vicinity of QCNPS, 2000 - 2022 Figure C-4 Air Particulates - Gross Beta - Stations Q-01 and Q-02 Collected in the Vicinity of QCNPS, 2000 - 2022 Figure C-5 Air Particulates - Gross Beta - Stations Q-03 and Q-04 Collected in the Vicinity of QCNPS, 2000 - 2022.

Figure C-6 Air Particulates - Gross Beta - Station Q-07 (C) Collected in the Vicinity of QCNPS, 2000 - 2010 Figure C-7 Air Particulates - Gross Beta - Stations Q-13 and Q-16 Collected in the Vicinity of QCNPS, 2005 - 2022 iii

Figure C-8 Air Particulates - Gross Beta - Stations Q-37 and Q-38 Collected in the Vicinity of QCNPS, 2005 - 2022 Figure C-9 Air Particulates - Gross Beta - Stations Q-41 and Q-42 (C) Collected in the Vicinity of QCNPS, 2009 - 2022 Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2022 Table D-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2022 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2022 Appendix E Errata Data Appendix F Annual Radiological Groundwater Protection Program Report (ARGPPR) iv

I. Summary and Conclusions In 2022, the Quad Cities Generating Station released to the environment through the radioactive effluent gaseous pathways, approximately 61.1 curies of noble gas, 1.49E-03 curies of fission and activation products, 25.1 curies of Carbon-14 and approximately 72.4 curies of tritium. The dose from both gaseous effluents was conservatively calculated for the Maximum Exposed Member of the Public. In 2022, Quad Cities Generating Station released to the environment, through the radioactive liquid effluent pathway, approximately 5.35E-01 curies of tritium and 3.86E-03 curies of fission and activation products. The results of those calculations and their comparison to the allowable limits were as follows:

NOTE: Percent of applicable limits are for Unit 1 and Unit 2 combined (Site)

Gaseous and Liquid Radiation Doses to Members of the Public at Locations Location % Of Applicable Estimated Age Distance Direction Applicable Site Limit Unit Effluents Organ Dose Group (meters) (toward) Limit Noble Gas Gamma - Air Dose 9.61E-04 All 1029 NNE 4.81E-03 20 mRad Noble Gas Beta - Air Dose 2.47E-04 All 1029 NNE 6.18E-04 40 mRad Iodine, Particulate 4.05E-02 Child 1.62E-01 Total Body 1029 NNE 25 mrem C-14 & Tritium Iodine, Particulate 1.86E-01 Child Bone 1029 NNE 6.20E-01 30 mrem C-14 & Tritium Liquid Total Body 1.70E-02 Adult Mississippi River 2.83E-01 6 mrem Liquid Liver 2.87E-02 Teen Mississippi River 1.44E-01 20 mrem Skyshine Total Body 7.49E+00 All 800 N 3.00E+01 25 mrem Total Body (Gas + 7.53E+00 All 40CFR190 800 N 3.01E+01 25 mrem Liq+ Skyshine)

The doses as a result of the radiological effluents released from the Quad Cities Generating Station were a very small percentage of the allowable limits, with the exception of 40CFR190 whole body radiation which was calculated to be 30.1% of the 25 mrem/yr limit. The largest component of 40CFR190 dose is attributable to BWR skyshine from N-16. This value is conservatively calculated for the hypothetical maximum exposed member of the public.

Nitrogen-16 (N-16) is a byproduct of Hydrogen addition into the Reactor Coolant System (RCS). Hydrogen addition is performed to maintain RCS chemistry parameters that reduce corrosion potential. Due to its short half-life (7.13 seconds),

N-16 is not detectable as a plant effluent as it decays prior to reaching gaseous discharge pathways. Additionally, this dose is conservatively calculated instead of measured because an annual dose of 7.489E+00 mrem is too low to be reliably detected on the environmental dosimetry utilized by the station.

This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Quad Cities Nuclear Power Station (QCNPS) by Constellation covers the period 01 January 2022 through 31 December 2022. During that time period, 1,466 analyses were performed on 1,355 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of QCNPS had no adverse radiological impact on the environment.

Surface water samples were analyzed for concentrations of gross beta, tritium, iron, nickel and gamma emitting nuclides. Ground water samples were analyzed for concentrations of tritium and gamma emitting nuclides. No fission or activation products were detected. Gross beta activities detected were consistent with those detected in previous years and consistent with the control stations.

Fish (commercially and recreationally important species) and sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected above the required LLD in any fish or sediment samples.

Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides. No fission or activation products were detected.

High sensitivity iodine-131 (I-131) analyses were performed on air samples. No I-131 was detected.

Cow milk samples were analyzed for concentrations of I-131 and gamma emitting nuclides. No I-131 was detected. Concentrations of naturally occurring isotopes (K-40 averaging 1,096 pCi/L) were consistent with those detected in previous years.

No fission or activation products were detected.

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 Luminescence Dosimeters (OSLD). Beginning in 2012, Constellation (formerly Exelon) changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters were deployed and Thermoluminescent Dosimeters (TLD) were discontinued. The relative comparison to control locations remains valid.

OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

II. Introduction The Quad Cities Nuclear Power Station (QCNPS), consisting of two 2,957 MWth boiling water reactors owned and operated by Constellation Energy Corporation, is located in Cordova, Illinois along the Mississippi River. Unit No.1 went critical on 16 March 1972. Unit No. 2 went critical on 02 December 1973. The site is located in northwestern Illinois, approximately 182 miles west of Chicago, Illinois.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer on samples collected during the period 1 January 2022 through 31 December 2022.

A. Objectives of the REMP The objectives of the REMP are to:

1. Provide data on measurable levels of radiation and radioactive materials in the site environs

2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure B. Implementation of the Objectives The implementation of the objectives is accomplished by:

1. Identifying significant exposure pathways

2. Establishing baseline radiological data of media within those pathways

3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment C. Radiation and Radioactivity All matter is made of atoms. An atom is the smallest part into which matter can be broken down and still maintain all its chemical properties. Nuclear radiation is energy, in the form of waves or particles that is given off by unstable, radioactive atoms. Radioactive material exists naturally and has always been a part of our environment. The earth's crust, for example, contains radioactive uranium, radium, thorium and potassium. Some radioactivity is a result of nuclear weapons testing. Examples of radioactive fallout that is normally present in environmental samples are cesium-137 and strontium-90. Some examples of radioactive materials released from a nuclear power plant are cesium-137, iodine-131, strontium-90 and cobalt-60.

Radiation is measured in units of millirem; much like temperature is measured in degrees. A millirem is a measure of the biological effect of the energy deposited in tissue. The natural and man-made radiation dose received in one year by the average American is 300 to 400 mrem (References 2, 3, 4 in Table II.D-1 below). Radioactivity is measured in curies. A curie is that amount of radioactive material needed to produce 37,000,000,000 nuclear disintegrations per second. This is an extremely large amount of radioactivity in comparison to environmental radioactivity.

That is why radioactivity in the environment is measured in picocuries. One picocurie is equal to one trillionth of a curie.

D. Sources of Radiation As mentioned previously, naturally occurring radioactivity has always been a part of our environment. Table II D-1 shows the sources and doses of radiation from natural and man-made sources.

Table II.D-1 Radiation Sources and Corresponding Dose (1)

NATURAL MAN-MADE Radiation Dose Radiation Dose Source Source (millirem/year) (millirem/year)

Internal, inhalation (2) 228 Medical (3) 300 External, space 33 Consumer (4) 13 Internal, ingestion 29 Industrial(5) 0.3 External, terrestrial 21 Occupational 0.5 Weapons Fallout <1 Nuclear Power Plants <1 Approximate Total 311 Approximate Total 314 (1) Information from NCRP Reports 160 and 94 (2) Primarily from airborne radon and its radioactive progeny (3) Includes CT (147 mrem), nuclear medicine (77 mrem), interventional fluoroscopy (43 mrem) and conventional radiography and fluoroscopy (33 mrem)

(4) Primarily from cigarette smoking (4.6 mrem), commercial air travel (3.4 mrem), building materials (3.5 mrem), and mining and agriculture (0.8 mrem)

(5) Industrial, security, medical, educational, and research Cosmic radiation from the sun and outer space penetrates the earth's atmosphere and continuously bombards us with rays and charged particles.

Some of this cosmic radiation interacts with gases and particles in the atmosphere, making them radioactive in turn. These radioactive byproducts from cosmic ray bombardment are referred to as cosmogenic radionuclides.

Isotopes such as beryllium-7 and carbon-14 are formed in this way.

Exposure to cosmic and cosmogenic sources of radioactivity results in about 33 mrem of radiation dose per year.

Additionally, natural radioactivity is in our body and in the food we eat (about 29 millirem/yr), the ground we walk on (about 21 millirem/yr) and the air we breathe (about 228 millirem/yr). The majority of a person's annual dose results from exposure to radon and thoron in the air we breathe. These gases and their radioactive decay products arise from the decay of naturally occurring uranium, thorium and radium in the soil and building products such as brick, stone and concrete. Radon and thoron levels vary greatly with location, primarily due to changes in the concentration of uranium and thorium in the soil. Residents at some locations in Colorado, New York, Pennsylvania, and New Jersey have a higher annual dose as a result of higher levels of radon/thoron gases in these areas. In total, these various sources of naturally occurring radiation and radioactivity contribute to a total dose of about 311 mrem per year.

In addition to natural radiation, we are normally exposed to radiation from a number of man-made sources. The single largest doses from man-made sources result from therapeutic and diagnostic applications of x-rays and radiopharmaceuticals. The annual dose to an individual in the U.S. from medical and dental exposure is about 300 mrem. Consumer products, such as televisions and smoke detectors, contribute about 13 mrem/yr. Much smaller doses result from weapons fallout (less than 1 mrem/yr) and nuclear power plants. Typically, the average person in the United States receives about 314 mrem per year from man-made sources.

III. Program Description A. Sample Collection Samples for the QCNPS REMP were collected for Constellation by ATI Environmental Inc. (Midwest Labs). This section describes the general sampling methods used by Environmental Inc. to obtain environmental samples for the QCNPS REMP in 2022. Sample locations and descriptions can be found in Table B-1 and Figures B-1 and B-2, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground water, fish and sediment. Surface water samples were collected weekly from two locations, Q-33 and Q-34 (Control).

Ground water samples were collected quarterly from two locations, Q-35 and Q-36. All water samples were collected in new containers, which were rinsed with source water prior to collection.

Fish samples comprising the edible portions of commercially and recreationally important species were collected semiannually at two locations, Q-24 and Q-29 (Control). Sediment samples composed of recently-deposited substrate were collected at two locations semiannually, Q-39 and Q-40 (Control).

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, and airborne iodine. Airborne iodine and particulate samples were collected and analyzed at ten locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38, Q-41 and Q-42 (control)).

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 particulate filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on samples of milk and food product. Milk samples were collected biweekly at one location (Q-26) from May through October, and monthly from November through April. All samples were collected in new plastic containers from the bulk tank, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected annually in July at five locations (Q-Control, Q-Quad 1, Q-Quad 2, Q-Quad 3, and Q-Quad 4). Various types of broadleaf and root vegetables were collected and placed in new plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Beginning in 2012, Constellation (formerly Exelon) changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters (OSLD) were deployed and Thermoluminescent Dosimeters (TLD) were discontinued. The relative comparison to control locations remains valid. OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

Each location consisted of 2 OSLD sets. The OSLD locations were placed on and around the QCNPS site as follows:

An inner ring consisting of 15 locations (Q-101, Q-102, Q-103, Q-104, Q-105, Q-106, Q-107, Q-108, Q-109, Q-111, Q-112, Q-113, Q-114, Q-115 and Q-116). These OSLDs are located in 15 of the 16 meteorological sectors in the general area of the site boundary (approximately 0.1 - 3 miles from the site).

There are no OSLDs located in the SSW sector because this sector is located over water.

An outer ring consisting of 16 locations (Q-201, Q-202, Q-203, Q-204, Q-205, Q-206, Q-207, Q-208, Q-209, Q-210, Q-211, Q-212, Q-213, Q-214, Q-215 and Q-216). These OSLDs are located in each of the 16 meteorological sectors (approximately 6.0 - 8.0 km from the site).

An other set consisting of 9 locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38 and Q-41). The locations are at each of the air sample stations around the site.

The balance of one location (Q-42) is the control site.

The specific OSLD locations were determined by the following criteria:

1. The presence of relatively dense population;

2. Site meteorological data taking into account distance and elevation for each of the sixteen 22.5 degree sectors around the site, where estimated annual dose from QCNPS, if any, would be most significant;

3. On hills free from local obstructions and within sight of the stack (where practical);

4. Near the closest dwelling to the stack in the prevailing downwind direction.

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 QCNPS REMP in 2022 and the type of analyses. The analytical procedures used by the TBE laboratory are listed in Table B-2.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of beta emitters in surface water and air particulates

2. Concentrations of gamma emitters in ground and surface water, air particulates, milk, fish, sediment and vegetation

3. Concentrations of tritium (H-3) in ground and surface water

4. Concentrations of I-131 in air and milk

5. Ambient gamma radiation levels at various site environs

6. Concentrations of Iron-55 (Fe-55) and Nickel-63 (Ni-63) in surface water C. Data Interpretation The radiological and direct radiation data collected prior to Quad Cities Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Quad Cities 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:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5%

probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as an a priori (a before the fact) estimate of a system (including instrumentation, procedure and sample type) and not as an a posteriori (after the fact) criteria for the presence of activity. All analyses were designed to achieve the required QCNPS detection capabilities for environmental sample analysis.

The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an a posteriori (after the fact) estimate of the presence of activity.

2. Net Activity Calculation and Reporting of Results Net activity for a sample is calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity effecting a negative number. An MDC is reported in all cases where positive activity was not detected.

Gamma spectroscopy results for each type of sample were grouped as follows:

For surface water, groundwater and vegetation 12 nuclides, manganese-54 (Mn-54), cobalt-58 (Co-58), iron-59 (Fe-59),

colbalt-60 (Co-60), zinc-65 (Zn-65), zirconium-95 (Zr-95),

niobium-95 (Nb-95), I-131, cesium-134 (Cs-134), Cs-137, barium-140 (Ba-140), and lanthanum-140 (La-140) were reported.

For fish, sediment, air particulate and milk 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137 and Ba-140 and La-140 were reported.

For air iodine, one nuclide, I-131 was reported.

Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.

D. Program Exceptions For 2022 the QCNPS REMP had a sample recovery rate in excess of 97.7%.

Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code(s) Date Pump found not running; power outage caused by high winds.

AP/AI Q-02 04/15/22 Timer indicated 81.9 hrs, Fuse reset, pump back in operation.

Timer indicates approx. 5 hrs. less than expected due to a Q-13, Q-16 power outage caused by thunderstorms in the area. Timer AP/AI 05/06/22 Q-41, Q-42 indicated around 169 hrs (expected value for the collection period).

AP/AI Q-41 06/24/22 Intake hose found disconnected Samples mishandled by carrier and arrived late to lab. LLD VE Quad-2 07/20/22 unable to be met due to delay. Resampled on 08/05.

Timer indicates approx. 5 hrs less than expected due to a AP/AI Q-02 10/22/22 tripped fuse.

Timer indicates approx. 15 hrs less than expected due to a AP/AI Q-37, Q-38 12/02/22 power outage (the 12/09 collection timer indicated an expected value of 169.4 hrs)

Timer indicates approx. 221 hrs less than expected due to a AP/AI Q-37, Q-38 12/02/22 power outage (the 12/09 collection timer indicated an expected value of 169.4 hrs)

Pump restarted at an alternative location on 12/13 at 12:00.

AP/AI Q-03 12/16/22 Run time was calculated.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date(s) 01/01/22 SW Q-33, Q-34 No sample; water frozen

- 03/04/22 SW Q-33 03/11/22 No sample - ice flows blocked access to water No sample - pump found not running; power outage AP/AI Q-02 04/22/22 caused by thunderstorms.

Q-111-1/1A OSLDs missing in field; premises searched OSLD Q-202-1/1A 2nd Quarter unsuccessfully.

Q-214-1/1A Intake hose disengaged, filter very pale. Connector AP/AI Q-41 07/22/22 tested & lubricated.

08/05/22 AP/AI Q-03 No sample; no power at the station

- 12/23/22 10/29/22 Pump found not running due to tripped fuse; pump AP/AI Q-02

- 11/04/22 exchanged on 11/04 12/23/22 SW Q-33, Q-34 No sample; river frozen

- 12/30/22 Quad Cities onsite REMP Air Sampler, Q-03, was found tripped between sampling periods of August 5th and August 12th. The breaker feeding the air sampler was reset and the Q-03 air sampler pump restarted. The following sample period, the Q-03 REMP Air Sampler was found tripped again due to a plant breaker being tripped. Electrical maintenance further identified that there was a break in power somewhere between the feed from the breaker to the Q-03 Air Sampler.

During the time the Q-03 REMP Air Sampler was not running, permanent solutions for Q-03 power repair were explored. Quotes from multiple vendors resulted in unexpectedly high expenses for both permanent and temporary power solutions. To satisfy requirements of Quad Cities ODCM, Q-03 REMP Air Sampler was temporarily relocated. The relocation is within the same D/Q sector. Sampling was restarted at the temporary location between December 9th and December 16th sampling periods. Q-03 REMP Air Sampler is currently running at the temporary location while ongoing permanent power solutions are pursued.

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 2022.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at two locations (Q-33 and Q-34). Of these locations only Q-33, located downstream, could be affected by Quad Cities effluent releases. The following analyses were performed:

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-I.1, Appendix C). Gross beta activity was detected in 18 of 20 samples. The values ranged from 2.8 to 9.9 pCi/L. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C). The required LLD was met.

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-I.2, Appendix C). No tritium activity was detected (Figure C-2, Appendix C). The 2000 pCi/L OCDM and contractually-required 200 pCi/L LLDs were met.

Iron-55 and Nickel-63 Quarterly composites of monthly collections were analyzed for Fe-55 and Ni-63 (Table C-I.2, Appendix C). No Fe-55 or Ni-63 were detected. The required LLDs were met.

Gamma Spectrometry Samples from both locations were analyzed monthly for gamma emitting nuclides (Table C-I.3, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

2. Ground Water Quarterly grab samples were collected at two locations (Q-35 and Q-36).

Both locations could be affected by Quad Cities effluent releases. The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-II.1, Appendix C). No tritium activity was detected (Figure C-3, Appendix C). The 2000 pCi/L OCDM and contractually-required 200 pCi/L LLDs were met.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-II.2, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

3. Fish Fish samples comprised of various commercially and recreationally important species were collected at two locations (Q-24 and Q-29) semiannually. Location Q-24 could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations were analyzed for gamma emitting nuclides (Table C-III.1, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

4. Sediment Aquatic sediment samples were collected at two locations (Q-39 and Q-40) semiannually. The location Q-39, located downstream, could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from Q-39 and Q-40 were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). No nuclides potentially associated with QCNPS were detected and all required LLDs were met.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from ten locations on a weekly basis. The ten locations were separated into three groups: Near-field samplers within 4 km (2.5 miles) of the site (Q-01, Q-02, Q-03 and Q-04), far-field samplers between 4 and 10 km (2.5 - 6.2 miles) from the site (Q-13, Q-16, Q-37, Q-38 and Q-41) and the Control sampler between 10 and 30 km (6.2 - 18.6 miles) from the site (Q-42). 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)

Comparison of results among the four groups aid in determining the effects, if any, resulting from the operation of QCNPS. The results from the near-field locations (Group I) ranged from 6 to 53E-03 pCi/m3 with a mean of 20E-03 pCi/m3. The results from the far-field locations (Group II) ranged from 6 to 64E-03 pCi/m3 with a mean of 21E-03 pCi/m3. The results from the Control location (Group III) ranged from 7 to 55E-03 pCi/m3 with a mean of 21E-03 pCi/m3.

Comparison of the 2022 air particulate data with previous year's data indicate no effects from the operation of QCNPS.

In addition, comparisons of the weekly mean values for 2022 ndicate no notable differences among the three groups.

(Figures C-4 through C-9, Appendix C)

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-V.3, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from ten locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38, Q-41 and Q-42) and analyzed weekly for I-131 (Table C-VI.1, Appendix C). All results were less than the LLD for I-131.

2. Terrestrial

a. Milk Samples were collected from one location (Q-26) biweekly May through October and monthly November through April. The following analyses were performed:

Iodine-131 Milk samples from the location were analyzed for concentrations of I-131 (Table C-VII.1, Appendix C). No I-131 was detected and the LLD was met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VII.2, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

b. Food Products Food product samples were collected at four locations plus a control location (Q-Control, Q-Quad 1, Q-Quad 2, Q-Quad 3 and Q-Quad 4) annually during growing season. Four locations, (Q-Quad 1, Q-Quad 2, Q-Quad 3 and Q-Quad 4) could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-VIII.1, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing optically stimulated luminescence dosimeters. Forty-one OSLD locations were established around the site. Results of OSLD measurements are listed in Tables C-IX.1 and C-IX.2, Appendix C.

All of the OSLD measurements were < 20 mRem/quarter, with a range of 0.4 to 19.1 mRem/quarter. A comparison of the Inner Ring, Outer Ring and Other data to the Control Location data, indicate that the ambient gamma radiation levels from all the locations were comparable.

D. Independent Spent Fuel Storage Installation QCNPS commenced use of an Independent Spent Fuel Storage Installation (ISFSI) in Dec 2005. There are no measurable changes in ambient gamma radiation levels as a result of ISFSI operations.

E. Land Use Survey A Land Use Survey conducted during August 2022 around QCNPS was performed by ATI Environmental Inc. (Midwest Labs) for Constellation to comply with the Quad Cities Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident and milk producing animals in each of the sixteen 22.5 degree sectors around the site. The results from the land use census have not identified any locations, which yield a calculated dose or dose commitment, via the same pathway, that is at least 20% greater than at a location from which samples are currently being obtained. The results of this survey are summarized below:

Distance in Miles from QCNPS Residence Livestock Milk Farm Sector Miles Miles Miles A N 0.60 - -

B NNE 1.20 3.1 -

C NE 1.30 3.2 -

D ENE 2.90 2.9 -

E E 2.00 5.5 -

F ESE 2.80 3.1 3.1 G SE 1.70 5.3 -

H SSE 1.10 4.5 6.6 J S 0.75 - -

K SSW 3.20 3.5 -

L SW 2.90 3.3 -

M WSW 2.20 2.7 -

N W 2.60 4.3 -

P WNW 2.70 3.8 -

Q NW 2.60 4.7 -

R NNW 2.10 2.2 -

Of the above listed Milk Farms, only the farm located at 3.1 miles ESE of QCNPS, listed in the sample results section as Bill Stanley Dairy, has elected to participate in the QCNPS REMP program. Participation by local farmers is voluntary.

F. Errata Data There is no errata data for 2022.

G. Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate (AP), air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

A. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of TBEs 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.

B. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the US EPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERAs 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.

C. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:

Acceptable (flag = A) - result within +/- 20% of the reference value

Acceptable with Warning (flag = W) - result falls in the +/- 20%

to +/- 30% of the reference value

Not Acceptable (flag = N) - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

For the TBE laboratory, 142 out of 150 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.

NOTE: Two analyses (soil for Tc-99 and U-238) that did not meet acceptance criteria was performed for TBE information and is not on the list of required ICP analyses. A summary is found below:

1. The Analytics March 2022 AP Ce-141 result was evaluated as Not Acceptable. The reported value for Ce-141 was 60.9 pCi and the known result was 42.0 pCi/L (1.45 ratio of reported result vs. known; TBEs internal acceptance range is 0.70 - 1.30). This sample was used as the workgroup duplicate with a result of 45.7 (109% of known) and was also counted on a different detector with a result of 50.9 (121% of known).

This was TBEs first failure for AP Ce-141. (NCR 22-04)

2. The MAPEP February 2022 Urine U-234 & U-238 results were evaluated as Not Acceptable. TBEs reported values of 0.142 and 0.0254 were above the known upper ranges of 0.0096 and 0.0134 respectively for U-234 and U-238. These spiked values were below TBEs typical MDC for urine client samples. The samples were re-prepped using a larger sample aliquot and counted for 60 hours6.944444e-4 days 0.0167 hours 9.920635e-5 weeks 2.283e-5 months as opposed to 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months . The recount results were 0.00732 for U-234 and 0.0119 for U-238 (both within acceptable range). MAPEP urine samples will be flagged to use a larger sample aliquot and counting time than typical client samples. MAPEP did not include any urine cross-check samples in August. (NCR 22-05)

3. The ERA MRAD September 2022 AP Pu-238 was evaluated as Not Acceptable. The reported value was 38.8 pCi and the known result was 29.9 (acceptance range 22.6 - 36.7). The AP filter was cut in half prior to digestion (shared with Fe-55) but should have been complete digested together and aliquotted afterwards like typical client samples.

This is the first failure for AP Pu-238. (NCR 22-19)

4. The ERA October 2022 water Uranium result was evaluated as Not Acceptable. The reported value was 10.54 pCi/L and the known was 8.53 (acceptance range 6.60 - 9.88) or 124% of the known (acceptable for TBE QC). The 2-sigma error was 3.2, placing the reported result well within the acceptable range. This sample was used as the workgroup duplicate with a result of 8.2 +/- 2.9 pCi/L (also within the acceptable range). All other QA was reviewed with no anomalies.

(NCR 22-20)

5. The Analytics AP Co-60 result was evaluated as Not Acceptable. The reported value was 207 pCi and the known was 147 (141% of the known). TBEs internal QC acceptance is 70 - 130%. All QA was reviewed with no anomalies. This sample was used as the workgroup duplicate and counted on a different detector with a result of 167 pCi (114% of the known). This is the first failure for AP Co average result ratio compared to the known is 109%. (NCR 22-21)

6. The MAPEP August 2022 water Tc-99 result was evaluated as Not Acceptable. The reported value was 1.86 +/- 0.414 Bq/L for this false positive test. The evaluation of the submitted result to the 3 times the uncertainty indicated a slight positive. This sample was used as the workgroup duplicate with a result of 0.88 +/- 0.374 Bq/L. All QC was reviewed, and no anomalies found. This is the first unacceptable since the resumption of reporting water Tc-99 for the 3rd quarter of 2020. TBE to known ratios have ranged from 94-109% during this time.

(NCR 22-22)

The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Intentionally left blank TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2022 NAME OF FACILITY: QUAD CITIES DOCKET NUMBER: 50-254 &50-265 LOCATION OF FACILITY: CORDOVA, IL REPORTING PERIOD: 2022 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER GR-B 20 4 4.8 4.4 4.8 Q-33 INDICATOR 0 (PCI/LITER) (9/10) (9/10) (9/10) CORDOVA 2.8 - 9.9 3.4 - 5.3 2.8 - 9.9 3.1 MILES SSW OF SITE H-3 8 2000 <LLD <LLD - 0 FE-55 8 200 <LLD <LLD - 0 NI-63 8 5 <LLD <LLD - 0 GAMMA 20 MN-54 15 <LLD <LLD - 0 CO-58 15 <LLD <LLD - 0 A-1 FE-59 30 <LLD <LLD - 0 CO-60 15 <LLD <LLD - 0 ZN-65 30 <LLD <LLD - 0 NB-95 15 <LLD <LLD - 0 ZR-95 30 <LLD <LLD - 0 I-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 8 2000 <LLD NA - 0 (PCI/LITER)

GAMMA 8 MN-54 15 <LLD NA - 0 CO-58 15 <LLD NA - 0 FE-59 30 <LLD NA - 0 CO-60 15 <LLD NA - 0 ZN-65 30 <LLD NA - 0 NB-95 15 <LLD NA - 0 ZR-95 30 <LLD NA - 0 I-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 ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2022 NAME OF FACILITY: QUAD CITIES DOCKET NUMBER: 50-254 &50-265 LOCATION OF FACILITY: CORDOVA, IL REPORTING PERIOD: 2022 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS FISH GAMMA 8 (PCI/KG WET) MN-54 130 <LLD <LLD - 0 CO-58 130 <LLD <LLD - 0 FE-59 260 <LLD <LLD - 0 CO-60 130 <LLD <LLD - 0 ZN-65 260 <LLD <LLD - 0 NB-95 NA <LLD <LLD - 0 ZR-95 NA <LLD <LLD - 0 CS-134 130 <LLD <LLD - 0 CS-137 150 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 A-2 SEDIMENT GAMMA 4 (PCI/KG DRY) 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-134 150 <LLD <LLD - 0 CS-137 180 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 AIR PARTICULATE GR-B 498 10 20.8 21.4 22.9 Q-38 INDICATOR 0 (E-3 PCI/CU.METER) (443/449) (52/52) (52/52) FULLER ROAD 5.8 - 64.3 6.7 - 54.6 7.3 - 64.3 4.7 MILES E OF SITE (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 QUAD CITIES NUCLEAR POWER STATION, 2022 NAME OF FACILITY: QUAD CITIES DOCKET NUMBER: 50-254 &50-265 LOCATION OF FACILITY: CORDOVA, IL REPORTING PERIOD: 2022 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR PARTICULATE GAMMA 40 (E-3 PCI/CU.METER) 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 A-3 AIR IODINE GAMMA 498 (E-3 PCI/CU.METER) I-131 70 <LLD <LLD - 0 MILK I-131 (LOW LVL) 19 1 <LLD NA - 0 (PCI/LITER)

GAMMA 19 MN-54 NA <LLD NA - 0 CO-58 NA <LLD NA - 0 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 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 ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2022 NAME OF FACILITY: QUAD CITIES DOCKET NUMBER: 50-254 &50-265 LOCATION OF FACILITY: CORDOVA, IL REPORTING PERIOD: 2022 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS VEGETATION GAMMA 11 (PCI/KG WET) 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 I-131 60 <LLD <LLD - 0 CS-134 60 <LLD <LLD - 0 CS-137 80 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 A-4 LA-140 NA <LLD <LLD - 0 DIRECT RADIATION OSLD-QUARTERLY 289 NA 12 13.3 16.9 Q-205-4 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (285/285) (4/4) (4/4) 0.4 - 19.1 8.4 - 15.5 13.3 - 19.1 4.8 MILES E (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2022 Location Location Description Distance & Direction From Site A. Surface Water Q-33 Cordova (indicator) 3.1 miles SSW Q-34 Camanche, Upstream (control) 4.4 miles NNE B. Ground/Well Water Q-35 McMillan Well (indicator) 1.5 miles S Q-36 Cordova Well (indicator) 3.3 miles SSW C. Milk - bi-weekly / monthly Q-26 Bill Stanley Dairy (indicator) 3.1 miles ESE D. Air Particulates / Air Iodine Q-01 Onsite 1 (indicator) 0.5 miles N Q-02 Onsite 2 (indicator) 0.4 miles ENE Q-03 Onsite 3 (indicator) 0.6 miles S Q-04 Nitrin (indicator) 1.7 miles NE Q-13 Princeton (indicator) 4.7 miles SW Q-16 Low Moor (indicator) 5.7 miles NNW Q-37 Meredosia Road (indicator) 4.4 miles ENE Q-38 Fuller Road (indicator) 4.7 miles E Q-41 Camanche, Upstream (control) 4.3 miles NNE Q-42 LeClaire (control) 8.7 miles SSW E. Fish Q-24 Pool #14 of Mississippi River, Downstream (indicator) 0.5 miles SW Q-29 Mississippi River, Upstream (control) 1.0 miles N F. Sediment Q-39 Cordova, Downstream on Mississippi River (indicator) 0.8 miles SSW North of Albany, Upstream on Mississippi River Q-40 8.9 miles NE (control)

G. Food Products Quadrant 1 Ken DeBaille 2.3 miles ENE Quadrant 2 Dale Nimmic 3.0 miles ESE Quadrant 3 Amy Johnston 1.8 miles S Quadrant 4 Mike Fawcett 4.5 miles NW Control Charles Leavens 9.5 miles NE H. Environmental Dosimetry - OSLD Inner Ring Q-101-1 / Q-101-1A 0.6 miles N Q-101-2 / Q-101-2A 0.9 miles N Q-102-1 / Q-102-1A 1.3 miles NNE Q-102-3 / Q-102-3A 1.4 miles NNE Q-103-1 / Q-103-1A 1.2 miles NE Q-103-2 / Q-103-2A 1.2 miles NE Q-104-1 / Q-104-1A 1.1 miles ENE Q-104-2 / Q-104-2A 0.9 miles ENE Q-105-1 / Q-105-1A 0.8 miles E Q-105-2 / Q-105-2A 0.8 miles E Q-106-2 / Q-106-2A 0.7 miles ESE Q-106-3 / Q-106-3A 0.7 miles ESE Q-107-2 / Q-107-2A 0.7 miles SE Q-107-3 / Q-107-3A 0.8 miles SE Q-108-1 / Q-108-1A 1.0 miles SSE Q-108-2 / Q-108-2A 0.9 miles SSE Q-109-1 / Q-109-1A 0.9 miles S Q-109-2 / Q-109-2A 1.2 miles S Q-111-1 / Q-111-1A 2.6 miles SW Q-111-2 / Q-111-2A 2.5 miles SW B-1

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2022 Location Location Description Distance & Direction From Site H. Environmental Dosimetry - OSLD (continued)

Inner Ring (continued)

Q-112-1 / Q-112-1A 2.5 miles WSW Q-112-2 / Q-112-2A 2.2 miles WSW Q-113-1 / Q-113-1A 2.5 miles W Q-113-2 / Q-113-2A 2.5 miles W Q-114-1 / Q-114-1A 2.1 miles WNW Q-114-2 / Q-114-2A 2.5 miles WNW Q-115-1 / Q-115-1A 2.6 miles NW Q-115-2 / Q-115-2A 2.3 miles NW Q-116-1 / Q-116-1A 2.3 miles NNW Q-116-3 / Q-116-3A 2.4 miles NNW Outer Ring Q-201-1 / Q-201-1A 4.2 miles N Q-201-2 / Q-201-2A 4.4 miles NNE Q-202-1 / Q-202-1A 4.8 miles NNE Q-203-1 / Q-203-1A 4.7 miles NE Q-203-2 / Q-203-2A 5.0 miles NE Q-204-1 / Q-204-1A 4.7 miles ENE Q-204-2 / Q-204-2A 4.5 miles ENE Q-205-1 / Q-205-1A 4.7 miles E Q-205-4 / Q-205-4A 4.8 miles E Q-206-1 / Q-206-1A 4.8 miles ESE Q-206-2 / Q-206-2A 4.8 miles ESE Q-207-1 / Q-207-1A 4.7 miles SE Q-207-4 / Q-207-4A 4.7 miles SE Q-208-1 / Q-208-1A 4.3 miles SSE Q-208-2 / Q-208-2A 4.9 miles SSE Q-209-1 / Q-209-1A 4.7 miles S Q-209-4 / Q-209-4A 4.7 miles S Q-210-1 / Q-210-1A 4.1 miles SWW Q-210-4* / Q-210-4A* 4.1 miles SSW Q-210-5 / Q-210-5A 3.3 miles SSW Q-211-1 / Q-211-1A 4.5 miles SW Q-211-2 / Q-211-2A 4.5 miles SW Q-212-1 / Q-212-1A 5.4 miles WSW Q-212-2 / Q-212-2A 4.4 miles WSW Q-213-1 / Q-213-1A 4.3 miles W Q-213-2 / Q-213-2A 4.8 miles W Q-214-1 / Q-214-1A 4.7 miles WNW Q-214-2 / Q-214-2A 4.4 miles WNW Q-215-1 / Q-215-1A 5.0 miles NW Q-215-2 / Q-215-2A 4.2 miles NW Q-216-1 / Q-216-1A 4.6 miles NNW Q-216-2 / Q-216-2A 4.3 miles NNW Other Q-01-1 / Q-01-2 Onsite 1 (indicator) 0.5 miles N Q-02-1 / Q-02-2 Onsite 2 (indicator) 0.4 miles ENE Q-03-1 / Q-03-2 Onsite 3 (indicator) 0.6 miles S Q-04-1 / Q-04-2 Nitrin (indicator) 1.7 miles NE Q-13-1 / Q-13-2 Princeton (indicator) 4.7 miles SW Q-16-1 / Q-16-2 Low Moor (indicator) 5.7 miles NNW Q-37-1 / Q-37-2 Meredosia (indicator) 4.4 miles ENE Q-38-1 / Q-38-2 Fuller Road (indicator) 4.7 miles E Q-41-1 / Q-41-2 Camanche (indicator) 4.3 miles NNE Control Q-42-1 / Q-42-2 LeClaire 8.7 miles SSW

Removed from ODCM in December 2006 and replaced by Q-210-5. Q-210-4 is for trending only B-2

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Quad Cities Nuclear Power Station, 2022 Sample Analysis Sampling Method Analytical Procedure Number Medium Gamma Monthly composite from Surface Water TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy weekly grab samples Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta activity in various Surface Water Gross Beta weekly grab samples matrices Quarterly composite from Surface Water Tritium TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation weekly grab samples Quarterly composite from TBE, TBE-2006 Iron-55 in various matrices Surface Water Iron and Nickel weekly grab samples TBE, TBE-2013 Radionickel in various matrices Gamma Ground Water Quarterly grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy Ground Water Tritium Quarterly grab samples TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation Semi-annual samples Gamma Fish collected via electroshocking TBE-2007 Gamma emitting radioisotope analysis Spectroscopy or other techniques Gamma Sediment Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy One-week composite of Air continuous air sampling TBE, TBE-2008 Gross Alpha and/or gross beta activity in various Gross Beta Particulates through glass fiber filter matrices paper Air Gamma Quarterly composite of each TBE, TBE-2007 Gamma emitting radioisotope analysis Particulates Spectroscopy station Weekly composite of Gamma Air Iodine continuous air sampling TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy through charcoal filter Bi-weekly grab sample when Milk I-131 cows are on pasture. TBE, TBE-2012 Radioiodine in various matrices Monthly all other times Bi-weekly grab sample when Gamma Milk cows are on pasture. TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy Monthly all other times Food Gamma Annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Products Spectroscopy Optically Quarterly OSLDs comprised Stimulated OSLD of two Al2O3:C Landauer Landauer Incorporated Luminescence Incorporated elements Dosimetry B-3

B-4 NOTE: All dosimeter locations contain two dosimeters, ex. numbering convention 102-1 / 102-1A Figure B-1 Map Quad Cities REMP Sampling Locations - 2 Mile Radius, 2022

o o 0

3 4 8 .7 North 11.2 5 5 o NNW NNE o

32

.7 5 6 .2 5 o 33 NW NE 30 o 3 .7 5 5 o

.2 56 WNW ENE o

o 2 8 1.2 5 7 8 .75 All dosimeter locations contain two dosimeters, ex. numbering convention B-5 102-1/102-1A West o

270 o 90 2mi East 5 mi 9.3 mi o

5 2 5 8 .7 10 1.2 5 o WSW ESE o

2 5 12

6. 3 .7 23 5 o SW SE o

5 6 21 14 3 .7 .2 5o 5o 16 8 .7 5

19 1.2 SSW o South SSE o

18 0 Figure B-2 Map Quad Cities REMP Sampling Locations - 9.3-Mile Radius, 2022

APPENDIX C DATA TABLES AND FIGURES

Intentionally left blank Table C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD Q-33 Q-34 01/01/22 - 01/31/22 (1) (1) 02/01/22 - 02/28/22 (1) (1) 03/04/22 - 03/26/22 5.4 +/- 1.9 3.6 +/- 1.8 04/01/22 - 04/29/22 4.2 +/- 1.8 5.2 +/- 1.9 05/06/22 - 05/27/22 2.8 +/- 1.6 3.7 +/- 1.7 06/03/22 - 06/24/22 4.9 +/- 2.0 5.0 +/- 2.1 07/01/22 - 07/29/22 < 2.2 < 2.3 08/05/22 - 08/26/22 9.9 +/- 2.9 4.4 +/- 2.5 09/02/22 - 09/30/22 4.6 +/- 1.9 5.3 +/- 2.0 10/08/22 - 10/29/22 3.4 +/- 1.8 4.6 +/- 1.9 11/04/22 - 11/25/22 4.5 +/- 2.0 3.4 +/- 1.9 12/02/22 - 12/16/22 3.5 +/- 2.0 4.2 +/- 2.1 MEAN +/- 2 STD DEV 4.8 +/- 4.2 4.4 +/- 1.4 Table C-I.2 CONCENTRATIONS OF TRITIUM, IRON AND NICKEL IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD H-3 Fe-55 Ni-63 Q-33 03/04/22 - 03/26/22 < 182 < 89 < 2.5 04/01/22 - 06/24/22 < 190 < 120 < 4.4 07/01/22 - 09/30/22 < 184 < 158 < 4.1 10/08/22 - 12/16/22 < 185 < 46 < 4.4 MEAN - - -

Q-34 03/04/22 - 03/26/22 < 174 < 180 < 2.6 04/01/22 - 06/24/22 < 187 < 140 < 4.3 07/01/22 - 09/30/22 < 170 < 104 < 3.8 10/08/22 - 12/16/22 < 183 < 124 < 4.4 MEAN - - -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-1

Table C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 I-131 Cs-134 Cs-137 Ba-140 La-140 Q-33 01/01/22 - 01/31/22 (1) 02/01/22 - 02/28/22 (1) 03/04/22 - 03/26/22 < 6 < 6 < 9 < 5 < 11 < 6 < 8 < 8 < 5 < 5 < 24 < 10 04/01/22 - 04/29/22 < 4 < 4 < 10 < 6 < 10 < 7 < 11 < 13 < 6 < 5 < 36 < 14 05/06/22 - 05/27/22 < 6 < 7 < 14 < 8 < 12 < 6 < 14 < 12 < 7 < 6 < 33 < 13 06/03/22 - 06/24/22 < 5 < 5 < 9 < 7 < 11 < 6 < 10 < 14 < 6 < 5 < 32 < 11 07/01/22 - 07/29/22 < 5 < 6 < 14 < 7 < 10 < 6 < 10 < 8 < 6 < 6 < 24 < 9 08/05/22 - 08/26/22 < 5 < 6 < 8 < 6 < 8 < 5 < 10 < 8 < 6 < 5 < 26 < 6 09/02/22 - 09/30/22 < 7 < 6 < 13 < 8 < 12 < 7 < 11 < 10 < 7 < 6 < 34 < 14 10/08/22 - 10/29/22 < 8 < 5 < 12 < 7 < 11 < 8 < 11 < 8 < 8 < 7 < 29 < 9 11/04/22 - 11/25/22 < 4 < 4 < 10 < 5 < 7 < 4 < 8 < 12 < 4 < 4 < 26 < 8 12/02/22 - 12/16/22 < 2 < 2 < 5 < 2 < 4 < 3 < 4 < 13 < 2 < 2 < 22 < 7 MEAN - - - - - - - - - - - -

C-2 Q-34 01/01/22 - 01/31/22 (1) 02/01/22 - 02/28/22 (1) 03/04/22 - 03/26/22 < 5 < 7 < 11 < 5 < 12 < 6 < 8 < 6 < 4 < 5 < 26 < 9 04/01/22 - 04/29/22 < 6 < 6 < 14 < 5 < 13 < 6 < 10 < 14 < 7 < 7 < 39 < 9 05/06/22 - 05/27/22 < 6 < 6 < 15 < 5 < 12 < 7 < 12 < 14 < 7 < 6 < 34 < 10 06/03/22 - 06/24/22 < 5 < 5 < 11 < 5 < 9 < 5 < 9 < 13 < 5 < 4 < 31 < 11 07/01/22 - 07/29/22 < 5 < 4 < 10 < 6 < 11 < 6 < 8 < 8 < 6 < 6 < 23 < 10 08/05/22 - 08/26/22 < 5 < 5 < 10 < 5 < 13 < 6 < 9 < 8 < 6 < 5 < 22 < 8 09/02/22 - 09/30/22 < 6 < 6 < 13 < 8 < 16 < 7 < 9 < 12 < 7 < 6 < 28 < 13 10/08/22 - 10/29/22 < 6 < 7 < 13 < 6 < 12 < 5 < 8 < 9 < 7 < 7 < 25 < 9 11/04/22 - 11/25/22 < 5 < 5 < 10 < 4 < 10 < 6 < 9 < 15 < 5 < 5 < 37 < 12 12/02/22 - 12/16/22 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 11 < 2 < 2 < 19 < 7 MEAN - - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-II.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD Q-35 Q-36 01/14/22 - 01/14/22 < 166 < 172 04/08/22 - 04/08/22 < 186 < 187 07/08/22 - 07/08/22 < 188 < 191 10/14/22 - 10/14/22 < 188 < 183 MEAN - -

C-3

Table C-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 I-131 Cs-134 Cs-137 Ba-140 La-140 Q-35 01/14/22 - 01/14/22 < 4 < 4 < 8 < 4 < 9 < 4 < 7 < 7 < 4 < 4 < 19 < 7 04/08/22 - 04/08/22 < 6 < 7 < 13 < 6 < 16 < 7 < 10 < 11 < 6 < 7 < 23 < 8 07/08/22 - 07/08/22 < 3 < 3 < 6 < 3 < 5 < 3 < 5 < 6 < 3 < 3 < 15 < 5 10/14/22 - 10/14/22 < 9 < 9 < 17 < 9 < 16 < 9 < 14 < 10 < 9 < 8 < 31 < 13 MEAN - - - - - - - - - - - -

Q-36 01/14/22 - 01/14/22 < 5 < 6 < 8 < 6 < 11 < 4 < 9 < 8 < 5 < 6 < 22 < 7 04/08/22 - 04/08/22 < 6 < 4 < 11 < 6 < 11 < 6 < 8 < 10 < 5 < 7 < 27 < 5 07/08/22 - 07/08/22 < 3 < 4 < 7 < 4 < 7 < 4 < 6 < 7 < 4 < 3 < 19 < 7 10/14/22 - 10/14/22 < 5 < 7 < 14 < 9 < 14 < 7 < 11 < 10 < 6 < 7 < 32 < 13 C-4 MEAN - - - - - - - - - - - -

Table C-III.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PC/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 Q-24 Common Carp 05/25/22 < 65 < 75 < 144 < 65 < 91 < 67 < 89 < 66 < 50 < 256 < 107 Freshwater Drum 05/25/22 < 60 < 70 < 112 < 51 < 83 < 56 < 96 < 60 < 48 < 306 < 96 Golden Redhorse 10/24/22 < 61 < 48 < 123 < 88 < 145 < 65 < 109 < 63 < 67 < 203 < 77 Largemouth Bass 10/24/22 < 57 < 64 < 95 < 46 < 114 < 50 < 87 < 62 < 56 < 194 < 57 MEAN - - - - - - - - - - -

Q-29 Smallmouth Buffalo 05/25/22 < 51 < 61 < 127 < 61 < 113 < 45 < 109 < 58 < 54 < 300 < 68 Walleye 05/25/22 < 66 < 66 < 156 < 92 < 145 < 73 < 126 < 72 < 86 < 416 < 123 C-5 Common Carp 10/24/22 < 62 < 53 < 146 < 64 < 115 < 57 < 77 < 56 < 68 < 201 < 65 Walleye 10/24/22 < 59 < 72 < 124 < 62 < 158 < 83 < 114 < 67 < 73 < 226 < 90 MEAN - - - - - - - - - - -

Table C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PC/KG DRY +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Q-39 05/13/22 < 62 < 68 < 138 < 95 < 179 < 76 < 137 < 98 < 99 < 309 < 108 10/22/22 < 64 < 54 < 120 < 78 < 151 < 66 < 107 < 75 < 69 < 241 < 78 MEAN - - - - - - - - - - -

Q-40 05/13/22 < 75 < 71 < 135 < 87 < 138 < 69 < 135 < 98 < 90 < 331 < 131 10/22/22 < 70 < 56 < 125 < 57 < 153 < 68 < 123 < 90 < 76 < 271 < 49 MEAN - - - - - - - - - - -

C-6

Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III PERIOD Q-01 Q-02 Q-03 Q-04 Q-13 Q-16 Q-37 Q-38 Q-41 Q-42 12/31/21 - 01/07/22 20 +/- 5 37 +/- 6 34 +/- 5 40 +/- 6 36 +/- 6 33 +/- 5 37 +/- 5 41 +/- 6 42 +/- 6 41 +/- 6 01/07/22 - 01/14/22 34 +/- 5 29 +/- 5 23 +/- 5 35 +/- 5 35 +/- 5 27 +/- 5 35 +/- 5 31 +/- 5 39 +/- 5 30 +/- 5 01/14/22 - 01/21/22 28 +/- 5 31 +/- 5 21 +/- 5 30 +/- 5 28 +/- 5 27 +/- 5 30 +/- 5 29 +/- 5 29 +/- 5 32 +/- 5 01/21/22 - 01/28/22 23 +/- 5 21 +/- 5 19 +/- 4 23 +/- 5 26 +/- 5 21 +/- 4 28 +/- 5 23 +/- 5 22 +/- 4 25 +/- 5 01/28/22 - 02/04/22 28 +/- 5 22 +/- 5 22 +/- 5 25 +/- 5 32 +/- 5 21 +/- 4 31 +/- 5 27 +/- 5 27 +/- 5 29 +/- 5 02/04/22 - 02/11/22 29 +/- 5 22 +/- 5 22 +/- 5 24 +/- 5 30 +/- 5 21 +/- 5 29 +/- 5 28 +/- 5 26 +/- 5 25 +/- 5 02/11/22 - 02/18/22 21 +/- 5 22 +/- 5 22 +/- 5 22 +/- 5 26 +/- 5 16 +/- 4 25 +/- 5 28 +/- 5 26 +/- 5 20 +/- 5 02/18/22 - 02/25/22 18 +/- 4 20 +/- 5 16 +/- 4 20 +/- 4 22 +/- 5 21 +/- 5 15 +/- 4 19 +/- 4 23 +/- 5 19 +/- 5 02/25/22 - 03/04/22 25 +/- 5 22 +/- 5 20 +/- 4 22 +/- 4 22 +/- 5 15 +/- 4 20 +/- 4 23 +/- 5 22 +/- 4 21 +/- 4 03/04/22 - 03/11/22 17 +/- 4 19 +/- 5 18 +/- 4 19 +/- 4 20 +/- 5 18 +/- 4 20 +/- 4 15 +/- 4 19 +/- 4 18 +/- 4 03/11/22 - 03/18/22 24 +/- 5 23 +/- 5 19 +/- 4 19 +/- 4 21 +/- 5 16 +/- 4 23 +/- 5 21 +/- 5 22 +/- 5 20 +/- 5 03/18/22 - 03/26/22 13 +/- 3 13 +/- 3 11 +/- 3 14 +/- 3 13 +/- 3 13 +/- 3 13 +/- 3 11 +/- 3 11 +/- 3 15 +/- 4 03/26/22 - 04/01/22 11 +/- 4 13 +/- 4 14 +/- 4 16 +/- 5 20 +/- 5 12 +/- 4 15 +/- 4 11 +/- 4 17 +/- 5 16 +/- 5 04/01/22 - 04/08/22 6 +/- 3 8 +/- 4 8 +/- 3 7 +/- 3 12 +/- 4 6 +/- 3 9 +/- 4 8 +/- 4 12 +/- 4 8 +/- 4 04/08/22 - 04/15/22 10 +/- 4 13 +/- 7 9 +/- 4 12 +/- 4 13 +/- 4 12 +/- 4 12 +/- 4 14 +/- 4 14 +/- 4 13 +/- 4 04/15/22 - 04/22/22 11 +/- 4 (1) 12 +/- 4 12 +/- 4 13 +/- 4 12 +/- 4 11 +/- 4 11 +/- 4 12 +/- 4 11 +/- 4 04/22/22 - 04/29/22 12 +/- 4 14 +/- 4 10 +/- 4 13 +/- 4 14 +/- 4 11 +/- 4 14 +/- 4 13 +/- 4 12 +/- 4 17 +/- 4 04/29/22 - 05/06/22 9 +/- 4 9 +/- 4 9 +/- 4 9 +/- 4 6 +/- 4 < 6 10 +/- 4 7 +/- 4 7 +/- 4 7 +/- 4 05/06/22 - 05/13/22 23 +/- 5 25 +/- 5 19 +/- 4 25 +/- 5 26 +/- 5 23 +/- 5 20 +/- 5 18 +/- 4 25 +/- 5 21 +/- 5 05/13/22 - 05/21/22 18 +/- 4 19 +/- 4 20 +/- 4 20 +/- 4 16 +/- 4 17 +/- 4 20 +/- 4 15 +/- 4 16 +/- 4 19 +/- 4 05/21/22 - 05/27/22 8 +/- 4 9 +/- 4 8 +/- 4 8 +/- 4 8 +/- 4 8 +/- 4 6 +/- 4 13 +/- 5 6 +/- 4 10 +/- 4 05/27/22 - 06/03/22 19 +/- 4 22 +/- 4 20 +/- 4 19 +/- 4 23 +/- 4 19 +/- 4 20 +/- 4 20 +/- 4 20 +/- 4 15 +/- 4 06/03/22 - 06/10/22 18 +/- 4 17 +/- 4 16 +/- 4 18 +/- 4 19 +/- 4 17 +/- 4 18 +/- 4 15 +/- 4 12 +/- 4 18 +/- 4 06/10/22 - 06/17/22 14 +/- 4 11 +/- 4 12 +/- 4 13 +/- 4 19 +/- 4 14 +/- 4 15 +/- 4 22 +/- 5 15 +/- 4 15 +/- 4 06/17/22 - 06/24/22 21 +/- 4 11 +/- 3 14 +/- 4 17 +/- 4 17 +/- 4 13 +/- 4 16 +/- 4 14 +/- 4 < 4 11 +/- 4 06/24/22 - 07/01/22 16 +/- 4 16 +/- 4 18 +/- 4 15 +/- 4 16 +/- 4 17 +/- 4 20 +/- 4 16 +/- 4 14 +/- 4 19 +/- 4 07/01/22 - 07/08/22 16 +/- 4 12 +/- 4 15 +/- 4 15 +/- 4 17 +/- 4 13 +/- 4 14 +/- 4 15 +/- 4 12 +/- 4 17 +/- 4 07/08/22 - 07/15/22 15 +/- 4 14 +/- 4 14 +/- 4 16 +/- 4 17 +/- 4 15 +/- 4 10 +/- 4 14 +/- 4 15 +/- 4 18 +/- 5 07/15/22 - 07/22/22 23 +/- 5 27 +/- 5 22 +/- 5 28 +/- 5 18 +/- 4 25 +/- 5 19 +/- 4 24 +/- 5 < 5 26 +/- 5 07/22/22 - 07/29/22 13 +/- 4 16 +/- 4 13 +/- 4 17 +/- 4 17 +/- 4 15 +/- 4 13 +/- 4 18 +/- 4 14 +/- 4 17 +/- 4 07/29/22 - 08/05/22 8 +/- 3 11 +/- 3 (1) 14 +/- 4 10 +/- 3 9 +/- 3 8 +/- 3 9 +/- 3 9 +/- 3 10 +/- 3 08/05/22 - 08/12/22 12 +/- 4 13 +/- 4 (1) 12 +/- 4 14 +/- 4 13 +/- 4 14 +/- 4 13 +/- 4 16 +/- 4 13 +/- 4 08/12/22 - 08/19/22 26 +/- 5 14 +/- 4 (1) 21 +/- 4 26 +/- 5 22 +/- 4 18 +/- 4 25 +/- 5 24 +/- 5 24 +/- 5 08/19/22 - 08/26/22 21 +/- 4 23 +/- 4 (1) 26 +/- 5 28 +/- 5 27 +/- 5 21 +/- 4 25 +/- 5 24 +/- 4 21 +/- 4 08/26/22 - 09/02/22 18 +/- 4 18 +/- 4 (1) 20 +/- 4 20 +/- 4 18 +/- 4 17 +/- 4 19 +/- 4 17 +/- 4 18 +/- 4 09/02/22 - 09/09/22 24 +/- 5 18 +/- 4 (1) 24 +/- 4 21 +/- 4 20 +/- 4 22 +/- 4 26 +/- 5 24 +/- 4 23 +/- 4 09/09/22 - 09/16/22 21 +/- 4 25 +/- 4 (1) 26 +/- 4 27 +/- 5 25 +/- 4 26 +/- 4 27 +/- 5 23 +/- 4 27 +/- 5 09/16/22 - 09/23/22 23 +/- 4 24 +/- 4 (1) 23 +/- 4 25 +/- 5 23 +/- 4 21 +/- 4 21 +/- 4 23 +/- 4 22 +/- 4 09/23/22 - 09/30/22 15 +/- 4 17 +/- 4 (1) 18 +/- 4 16 +/- 4 15 +/- 4 11 +/- 4 15 +/- 4 15 +/- 4 19 +/- 4 09/30/22 - 10/08/22 24 +/- 4 17 +/- 4 (1) 21 +/- 4 20 +/- 4 19 +/- 4 16 +/- 4 18 +/- 4 21 +/- 4 22 +/- 4 10/08/22 - 10/14/22 32 +/- 5 32 +/- 5 (1) 35 +/- 6 27 +/- 5 29 +/- 5 31 +/- 5 38 +/- 6 28 +/- 5 28 +/- 5 10/14/22 - 10/22/22 24 +/- 4 22 +/- 4 (1) 19 +/- 4 19 +/- 4 20 +/- 4 20 +/- 4 25 +/- 4 23 +/- 4 23 +/- 4 10/22/22 - 10/29/22 23 +/- 4 (1) (1) 24 +/- 4 27 +/- 5 21 +/- 4 23 +/- 4 24 +/- 4 26 +/- 4 24 +/- 4 10/29/22 - 11/04/22 47 +/- 6 (1) (1) 53 +/- 7 47 +/- 7 44 +/- 6 49 +/- 7 57 +/- 7 46 +/- 6 55 +/- 7 11/04/22 - 11/12/22 19 +/- 4 18 +/- 4 (1) 22 +/- 4 17 +/- 4 16 +/- 4 19 +/- 4 23 +/- 4 14 +/- 3 19 +/- 4 11/12/22 - 11/19/22 12 +/- 4 14 +/- 4 (1) 14 +/- 4 15 +/- 4 14 +/- 4 16 +/- 4 24 +/- 5 16 +/- 4 17 +/- 4 11/19/22 - 11/25/22 40 +/- 6 47 +/- 6 (1) 41 +/- 6 35 +/- 6 38 +/- 6 38 +/- 6 64 +/- 7 41 +/- 6 40 +/- 6 11/25/22 - 12/02/22 27 +/- 5 31 +/- 5 (1) 28 +/- 5 22 +/- 4 26 +/- 5 29 +/- 5 40 +/- 6 27 +/- 5 26 +/- 5 12/02/22 - 12/09/22 35 +/- 5 48 +/- 6 (1) 41 +/- 6 35 +/- 5 37 +/- 5 43 +/- 6 48 +/- 6 39 +/- 5 41 +/- 6 12/09/22 - 12/16/22 22 +/- 4 19 +/- 4 31 +/- 9 24 +/- 5 22 +/- 5 22 +/- 4 24 +/- 5 30 +/- 6 21 +/- 4 23 +/- 5 12/16/22 - 12/23/22 26 +/- 5 29 +/- 5 26 +/- 5 29 +/- 5 23 +/- 5 28 +/- 5 14 +/- 4 30 +/- 5 26 +/- 5 27 +/- 5 12/23/22 - 12/30/22 21 +/- 4 23 +/- 5 21 +/- 5 28 +/- 5 24 +/- 5 22 +/- 5 25 +/- 5 27 +/- 5 22 +/- 5 23 +/- 5 MEAN +/- 2 STD DEV 20 +/- 16 20 +/- 17 17 +/- 13 22 +/- 18 22 +/- 16 20 +/- 15 21 +/- 18 23 +/- 23 21 +/- 18 21 +/- 18 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7

Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEAR-SITE LOCATIONS GROUP II - FAR-FIELD LOCATIONS GROUP III - CONTROL LOCATION COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN PERIOD +/- 2SD PERIOD +/- 2SD PERIOD +/- 2SD 12/31/21 - 02/04/22 19 40 27 +/- 13 12/31/21 - 02/04/22 21 42 30 +/- 12 12/31/21 - 02/04/22 25 41 31 +/- 12 02/04/22 - 03/04/22 16 29 22 +/- 6 02/04/22 - 03/04/22 15 30 23 +/- 9 02/04/22 - 03/04/22 19 25 21 +/- 5 03/04/22 - 04/01/22 11 24 16 +/- 8 03/04/22 - 04/01/22 11 23 16 +/- 8 03/04/22 - 04/01/22 15 20 17 +/- 5 04/01/22 - 04/29/22 6 14 10 +/- 5 04/01/22 - 04/29/22 6 14 12 +/- 4 04/01/22 - 04/29/22 8 17 12 +/- 7 04/29/22 - 06/03/22 8 25 16 +/- 13 04/29/22 - 06/03/22 6 26 15 +/- 13 04/29/22 - 06/03/22 7 21 14 +/- 12 06/03/22 - 07/01/22 11 21 15 +/- 5 06/03/22 - 07/01/22 12 22 16 +/- 5 06/03/22 - 07/01/22 11 19 16 +/- 8 07/01/22 - 07/29/22 12 28 17 +/- 10 07/01/22 - 07/29/22 10 25 16 +/- 8 07/01/22 - 07/29/22 17 26 19 +/- 9 07/29/22 - 09/02/22 8 26 17 +/- 11 07/29/22 - 09/02/22 8 28 18 +/- 13 07/29/22 - 09/02/22 10 24 17 +/- 12 09/02/22 - 09/30/22 15 26 21 +/- 7 09/02/22 - 09/30/22 11 27 21 +/- 9 09/02/22 - 09/30/22 19 27 23 +/- 7 09/30/22 - 10/29/22 17 35 25 +/- 11 09/30/22 - 10/29/22 16 38 24 +/- 10 09/30/22 - 10/29/22 22 28 24 +/- 5 10/29/22 - 12/02/22 12 53 29 +/- 28 10/29/22 - 12/02/22 14 64 31 +/- 29 10/29/22 - 12/02/22 17 55 31 +/- 32 12/02/22 - 12/30/22 19 48 28 +/- 16 12/02/22 - 12/30/22 14 48 28 +/- 17 12/02/22 - 12/30/22 23 41 29 +/- 17 C-8 12/31/21 - 12/30/22 6 53 20 +/- 17 12/31/21 - 12/30/22 6 64 21 +/- 18 12/31/21 - 12/30/22 7 55 21 +/- 18

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 Q-01 12/31/21 - 04/01/22 < 3 < 4 < 7 < 3 < 8 < 4 < 5 < 3 < 2 < 36 < 14 04/01/22 - 07/01/22 < 2 < 3 < 5 < 2 < 3 < 3 < 4 < 2 < 2 < 23 < 10 07/01/22 - 09/30/22 < 1 < 2 < 6 < 2 < 5 < 2 < 4 < 2 < 2 < 18 < 11 09/30/22 - 12/30/22 < 2 < 2 < 3 < 2 < 5 < 2 < 3 < 2 < 1 < 16 < 4 MEAN - - - - - - - - - - -

Q-02 12/31/21 - 04/01/22 < 3 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 22 < 10 04/01/22 - 07/01/22 < 2 < 3 < 5 < 3 < 4 < 2 < 5 < 2 < 2 < 24 < 10 07/01/22 - 09/30/22 < 2 < 3 < 5 < 1 < 3 < 2 < 4 < 2 < 2 < 28 < 11 09/30/22 - 12/30/22 < 2 < 2 < 6 < 3 < 5 < 3 < 4 < 2 < 2 < 16 < 9 MEAN - - - - - - - - - - -

C-9 Q-03 12/31/21 - 04/01/22 < 2 < 2 < 4 < 3 < 4 < 2 < 3 < 2 < 2 < 22 < 8 04/01/22 - 07/01/22 < 2 < 2 < 6 < 3 < 4 < 3 < 4 < 1 < 2 < 26 < 11 07/01/22 - 08/19/22 < 4 < 10 < 30 < 6 < 20 < 12 < 17 < 7 < 6 < 433 < 371 12/13/22 - 12/30/22 < 7 < 7 < 15 < 8 < 17 < 7 < 12 < 7 < 6 < 49 < 20 MEAN - - - - - - - - - - -

Q-04 12/31/21 - 04/01/22 < 3 < 3 < 6 < 3 < 5 < 3 < 5 < 2 < 2 < 26 < 12 04/01/22 - 07/01/22 < 2 < 3 < 8 < 2 < 7 < 3 < 5 < 2 < 2 < 31 < 10 07/01/22 - 09/30/22 < 2 < 1 < 6 < 3 < 6 < 3 < 4 < 2 < 1 < 27 < 11 09/30/22 - 12/30/22 < 2 < 3 < 7 < 3 < 6 < 3 < 6 < 3 < 2 < 18 < 6 MEAN - - - - - - - - - - -

Q-13 12/31/21 - 04/01/22 < 3 < 4 < 10 < 3 < 8 < 4 < 7 < 3 < 3 < 35 < 18 04/01/22 - 07/01/22 < 3 < 4 < 9 < 4 < 9 < 4 < 8 < 4 < 3 < 42 < 22 07/01/22 - 09/30/22 < 2 < 3 < 7 < 3 < 5 < 2 < 5 < 1 < 2 < 22 < 12 09/30/22 - 12/30/22 < 2 < 2 < 3 < 2 < 2 < 2 < 4 < 3 < 2 < 13 < 8 MEAN - - - - - - - - - - -

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 Q-16 12/31/21 - 04/01/22 < 2 < 3 < 7 < 3 < 4 < 2 < 4 < 2 < 2 < 24 < 11 04/01/22 - 07/01/22 < 3 < 2 < 6 < 2 < 5 < 2 < 5 < 2 < 2 < 24 < 13 07/01/22 - 09/30/22 < 2 < 3 < 4 < 3 < 8 < 3 < 5 < 2 < 3 < 24 < 11 09/30/22 - 12/30/22 < 2 < 2 < 5 < 2 < 6 < 2 < 3 < 2 < 2 < 13 < 8 MEAN - - - - - - - - - - -

Q-37 12/31/21 - 04/01/22 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 2 < 2 < 15 < 8 04/01/22 - 07/01/22 < 3 < 4 < 9 < 3 < 5 < 2 < 7 < 3 < 2 < 32 < 17 07/01/22 - 09/30/22 < 2 < 2 < 6 < 2 < 4 < 2 < 3 < 2 < 2 < 22 < 11 09/30/22 - 12/30/22 < 2 < 2 < 6 < 2 < 5 < 2 < 4 < 2 < 2 < 16 < 5 MEAN - - - - - - - - - - -

C-10 Q-38 12/31/21 - 04/01/22 < 2 < 1 < 4 < 1 < 3 < 2 < 3 < 1 < 1 < 14 < 6 04/01/22 - 07/01/22 < 2 < 3 < 7 < 2 < 7 < 2 < 4 < 2 < 2 < 29 < 4 07/01/22 - 09/30/22 < 2 < 2 < 5 < 3 < 5 < 2 < 4 < 3 < 2 < 19 < 7 09/30/22 - 12/30/22 < 3 < 2 < 7 < 4 < 6 < 3 < 5 < 3 < 3 < 27 < 6 MEAN - - - - - - - - - - -

Q-41 12/31/21 - 04/01/22 < 1 < 2 < 3 < 2 < 3 < 2 < 3 < 1 < 1 < 17 < 7 04/01/22 - 07/01/22 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 2 < 2 < 26 < 9 07/01/22 - 09/30/22 < 2 < 2 < 4 < 2 < 6 < 3 < 5 < 2 < 2 < 26 < 7 09/30/22 - 12/30/22 < 3 < 3 < 6 < 3 < 5 < 4 < 6 < 3 < 3 < 21 < 9 MEAN - - - - - - - - - - -

Q-42 12/31/21 - 04/01/22 < 2 < 2 < 4 < 2 < 4 < 2 < 4 < 2 < 2 < 22 < 8 04/01/22 - 07/01/22 < 4 < 3 < 9 < 4 < 9 < 5 < 7 < 4 < 4 < 53 < 9 07/01/22 - 09/30/22 < 2 < 3 < 7 < 3 < 8 < 4 < 6 < 3 < 3 < 30 < 15 09/30/22 - 12/30/22 < 2 < 2 < 4 < 3 < 7 < 2 < 5 < 2 < 2 < 12 < 6 MEAN - - - - - - - - - - -

TABLE C-VI.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III PERIOD Q-01 Q-02 Q-03 Q-04 Q-13 Q-16 Q-37 Q-38 Q-41 Q-42 12/31/21 - 01/07/22 < 57 < 57 < 55 < 55 < 24 < 55 < 56 < 23 < 55 < 57 01/07/22 - 01/14/22 < 17 < 25 < 24 < 24 < 25 < 60 < 61 < 61 < 60 < 26 01/14/22 - 01/21/22 < 34 < 34 < 33 < 28 < 34 < 32 < 32 < 32 < 32 < 14 01/21/22 - 01/28/22 < 22 < 34 < 32 < 32 < 33 < 22 < 43 < 43 < 43 < 44 01/28/22 - 02/04/22 < 53 < 53 < 52 < 51 < 22 < 36 < 30 < 36 < 36 < 37 02/04/22 - 02/11/22 < 43 < 22 < 42 < 41 < 43 < 57 < 57 < 28 < 57 < 59 02/11/22 - 02/18/22 < 27 < 27 < 12 < 26 < 27 < 29 < 29 < 29 < 29 < 20 02/18/22 - 02/25/22 < 42 < 18 < 40 < 40 < 42 < 30 < 31 < 31 < 20 < 31 02/25/22 - 03/04/22 < 27 < 14 < 26 < 26 < 26 < 23 < 24 < 24 < 20 < 24 03/04/22 - 03/11/22 < 36 < 36 < 16 < 35 < 36 < 34 < 34 < 35 < 34 < 23 03/11/22 - 03/18/22 < 36 < 36 < 35 < 17 < 36 < 38 < 38 < 38 < 38 < 20 03/18/22 - 03/26/22 < 35 < 35 < 34 < 15 < 35 < 28 < 28 < 28 < 28 < 24 03/26/22 - 04/01/22 < 20 < 39 < 39 < 39 < 40 < 43 < 43 < 43 < 36 < 44 04/01/22 - 04/08/22 < 19 < 27 < 27 < 27 < 28 < 30 < 30 < 30 < 30 < 14 04/08/22 - 04/15/22 < 26 < 22 < 25 < 25 < 26 < 27 < 27 < 13 < 27 < 28 04/15/22 - 04/22/22 < 40 (1) < 39 < 38 < 40 < 49 < 49 < 49 < 49 < 21 04/22/22 - 04/29/22 < 25 < 58 < 58 < 58 < 60 < 33 < 33 < 33 < 33 < 29 04/29/22 - 05/06/22 < 65 < 63 < 63 < 26 < 67 < 49 < 49 < 48 < 49 < 26 05/06/22 - 05/13/22 < 30 < 29 < 12 < 29 < 30 < 55 < 56 < 56 < 55 < 24 05/13/22 - 05/21/22 < 13 < 31 < 31 < 31 < 31 < 50 < 21 < 50 < 49 < 50 05/21/22 - 05/27/22 < 26 < 60 < 60 < 60 < 61 < 66 < 67 < 67 < 66 < 29 05/27/22 - 06/03/22 < 34 < 33 < 22 < 33 < 34 < 31 < 31 < 31 < 31 < 15 06/03/22 - 06/10/22 < 24 < 49 < 49 < 49 < 51 < 49 < 50 < 50 < 41 < 51 06/10/22 - 06/17/22 < 66 < 64 < 64 < 64 < 31 < 38 < 32 < 39 < 38 < 40 06/17/22 - 06/24/22 < 56 < 65 < 65 < 65 < 67 < 66 < 34 < 68 < 66 < 68 06/24/22 - 07/01/22 < 30 < 29 < 29 < 12 < 30 < 53 < 54 < 27 < 53 < 55 07/01/22 - 07/08/22 < 26 < 60 < 60 < 60 < 61 < 48 < 48 < 50 < 20 < 50 07/08/22 - 07/15/22 < 26 < 59 < 59 < 59 < 60 < 29 < 30 < 15 < 29 < 30 07/15/22 - 07/22/22 < 51 < 49 < 49 < 49 < 24 < 46 < 46 < 48 < 46 < 32 07/22/22 - 07/29/22 < 13 < 30 < 30 < 30 < 31 < 45 < 46 < 22 < 45 < 47 07/29/22 - 08/05/22 < 21 < 49 (1) < 49 < 50 < 38 < 38 < 40 < 17 < 39 08/05/22 - 08/12/22 < 44 < 42 (1) < 42 < 18 < 33 < 14 < 35 < 33 < 34 08/12/22 - 08/19/22 < 29 < 33 (1) < 33 < 34 < 47 < 20 < 48 < 47 < 48 08/19/22 - 08/26/22 < 14 < 32 (1) < 32 < 33 < 39 < 40 < 41 < 16 < 41 08/26/22 - 09/02/22 < 28 < 65 (1) < 65 < 67 < 66 < 67 < 69 < 66 < 29 09/02/22 - 09/09/22 < 51 < 49 (1) < 21 < 51 < 57 < 58 < 60 < 57 < 25 09/09/22 - 09/16/22 < 37 < 24 (1) < 36 < 38 < 54 < 53 < 55 < 54 < 24 09/16/22 - 09/23/22 < 22 < 51 (1) < 51 < 51 < 49 < 50 < 22 < 49 < 51 09/23/22 - 09/30/22 < 53 < 52 (1) < 52 < 22 < 54 < 54 < 56 < 54 < 24 09/30/22 - 10/08/22 < 11 < 13 (1) < 13 < 13 < 14 < 14 < 14 < 9 < 14 10/08/22 - 10/14/22 < 56 < 54 (1) < 54 < 24 < 33 < 33 < 35 < 33 < 16 10/14/22 - 10/22/22 < 37 < 37 (1) < 36 < 15 < 23 < 10 < 24 < 23 < 24 10/22/22 - 10/29/22 < 44 (1) (1) < 43 < 44 < 32 < 14 < 34 < 32 < 33 10/29/22 - 11/04/22 < 61 (1) (1) < 26 < 63 < 64 < 65 < 67 < 64 < 28 11/04/22 - 11/12/22 < 41 < 41 (1) < 41 < 18 < 40 < 40 < 18 < 40 < 40 11/12/22 - 11/19/22 < 54 < 54 (1) < 54 < 23 < 22 < 47 < 48 < 46 < 46 11/19/22 - 11/25/22 < 46 < 46 (1) < 46 < 23 < 51 < 51 < 35 < 51 < 51 11/25/22 - 12/02/22 < 40 < 40 (1) < 40 < 17 < 28 < 31 < 32 < 28 < 12 12/02/22 - 12/09/22 < 32 < 32 (1) < 32 < 16 < 29 < 14 < 30 < 29 < 29 12/09/22 - 12/16/22 < 48 < 48 < 48 < 48 < 49 < 24 < 66 < 68 < 57 < 57 12/16/22 - 12/23/22 < 60 < 60 < 29 < 60 < 62 < 31 < 31 < 14 < 31 < 31 12/23/22 - 12/30/22 < 65 < 65 < 68 < 65 < 28 < 64 < 65 < 28 < 64 < 65 MEAN - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-11

Table C-VII.1 CONCENTRATIONS OF I-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION INDICATOR FARM PERIOD Q-26 01/07/22 < 0.8 02/04/22 < 0.7 03/04/22 < 0.8 04/01/22 < 0.7 05/06/22 < 0.6 05/21/22 < 0.9 06/03/22 < 0.9 06/17/22 < 0.9 07/01/22 < 0.9 07/15/22 < 0.8 07/29/22 < 0.7 08/12/22 < 0.8 08/26/22 < 0.9 09/09/22 < 0.9 09/23/22 < 0.8 10/08/22 < 0.9 10/22/22 < 0.9 11/04/22 < 1.0 12/02/22 < 0.7 MEAN -

C-12

Table C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Q-26 01/07/22 < 8 < 8 < 15 < 9 < 14 < 6 < 14 < 9 < 9 < 40 < 7 02/04/22 < 7 < 5 < 15 < 7 < 13 < 6 < 12 < 8 < 6 < 31 < 10 03/04/22 < 5 < 6 < 9 < 6 < 10 < 5 < 9 < 6 < 6 < 26 < 8 04/01/22 < 6 < 6 < 17 < 6 < 19 < 8 < 11 < 8 < 8 < 33 < 9 05/06/22 < 7 < 6 < 16 < 9 < 16 < 7 < 12 < 8 < 7 < 36 < 13 05/21/22 < 5 < 7 < 16 < 8 < 16 < 7 < 11 < 7 < 7 < 19 < 8 06/03/22 < 5 < 5 < 10 < 7 < 12 < 6 < 9 < 5 < 6 < 26 < 7 06/17/22 < 8 < 7 < 15 < 8 < 15 < 7 < 12 < 8 < 7 < 36 < 11 07/01/22 < 6 < 7 < 19 < 8 < 17 < 7 < 10 < 7 < 7 < 41 < 14 07/15/22 < 8 < 8 < 20 < 12 < 18 < 11 < 14 < 9 < 9 < 29 < 12 07/29/22 < 6 < 9 < 18 < 14 < 15 < 8 < 13 < 9 < 7 < 32 < 10 08/12/22 < 7 < 6 < 18 < 9 < 18 < 8 < 12 < 9 < 8 < 41 < 9 C-13 08/26/22 < 6 < 8 < 17 < 10 < 16 < 8 < 13 < 7 < 9 < 35 < 8 09/09/22 < 8 < 7 < 17 < 6 < 20 < 7 < 13 < 7 < 6 < 35 < 15 09/23/22 < 7 < 7 < 13 < 10 < 15 < 7 < 14 < 8 < 7 < 25 < 8 10/08/22 < 7 < 8 < 16 < 10 < 16 < 9 < 13 < 9 < 7 < 32 < 10 10/22/22 < 7 < 9 < 18 < 9 < 19 < 8 < 11 < 6 < 7 < 20 < 8 11/04/22 < 7 < 6 < 14 < 8 < 14 < 7 < 12 < 7 < 5 < 33 < 9 12/02/22 < 8 < 8 < 15 < 9 < 15 < 8 < 14 < 9 < 8 < 31 < 12 MEAN - - - - - - - - - - -

Table C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 I-131 Cs-134 Cs-137 Ba-140 La-140 Q-CONTROL Broccoli 07/20/22 < 16 < 16 < 36 < 14 < 43 < 16 < 34 < 43 < 20 < 17 < 87 < 48 Onions 07/20/22 < 12 < 11 < 27 < 13 < 25 < 13 < 23 < 34 < 13 < 12 < 81 < 21 MEAN - - - - - - - - - - - -

Q-QUAD 1 Cabbage 07/20/22 < 11 < 12 < 27 < 14 < 25 < 11 < 21 < 33 < 12 < 12 < 75 < 23 Potato 07/20/22 < 13 < 15 < 38 < 19 < 30 < 17 < 26 < 54 < 16 < 16 < 92 < 28 MEAN - - - - - - - - - - - -

Q-QUAD 2 Zucchini 07/20/22 < 10 < 11 < 25 < 12 < 25 < 12 < 20 < 34 < 11 < 12 < 71 < 20 Peppers/Carrots 07/20/22 < 82 < 83 < 161 < 80 < 153 < 92 < 155 < 232 < 81 < 79 < 546 < 161 Tomato 08/05/22 < 23 < 21 < 40 < 29 < 57 < 24 < 45 < 40 < 25 < 23 < 134 < 42 C-14 MEAN - - - - - - - - - - - -

Q-QUAD 3 Turnip 07/20/22 < 22 < 18 < 55 < 23 < 46 < 20 < 40 < 44 < 28 < 22 < 119 < 29 Cabbage 07/20/22 < 19 < 15 < 39 < 18 < 41 < 17 < 32 < 53 < 15 < 18 < 119 < 24 MEAN - - - - - - - - - - - -

Q-QUAD 4 Kale 07/20/22 < 14 < 14 < 38 < 18 < 32 < 17 < 25 < 43 < 18 < 17 < 86 < 24 Beet 07/20/22 < 9 < 10 < 25 < 13 < 24 < 12 < 18 < 31 < 10 < 11 < 65 < 20 MEAN - - - - - - - - - - - -

Table C-IX.1 QUARTERLY DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2022 Location 2022 Normalized Net Dose, MQX Monitoring Quarterly BQ + MDDQ Quarterly Facility Dose, FQ (mrem)

(mrem/std. Qtr.)

Location Baseline, BQ (mrem)

(mrem) 1 2 3 4 1 2 3 4 Other Q-01 11.8 17.1 11.3 14.5 15.5 11.9 ND ND ND ND Q-02 11.7 17.0 11.0 11.7 13.6 11.7 ND ND ND ND Q-03 10.7 16.0 10.0 11.9 12.8 11.7 ND ND ND ND Q-04 11.8 17.1 11.3 11.9 13.7 15.7 ND ND ND ND Q-13 13.1 18.4 10.1 12.6 17.1 4.1 ND ND ND ND Q-16 10.8 16.1 11.4 12.7 14.1 1.3 ND ND ND ND Q-37 13.8 19.1 12.0 14.2 15.5 17.4 ND ND ND ND Q-38 14.4 19.7 13.8 16.1 16.9 18.2 ND ND ND ND Q-41 13.7 19.0 12.4 13.5 14.4 1.7 ND ND ND ND Q-42 14.3 19.6 12.9 15.5 16.3 8.4 ND ND ND ND Inner Q-101-1 12.1 17.4 10.3 11.4 13.4 14.0 ND ND ND ND Q-101-2 12.1 17.4 11.5 12.4 13.5 14.7 ND ND ND ND Q-102-1 13.1 18.4 12.7 14.0 15.2 16.5 ND ND ND ND Q-102-3 12.8 18.1 12.6 12.2 14.3 13.5 ND ND ND ND Q-103-1 11.3 16.6 11.2 10.0 12.9 15.8 ND ND ND ND Q-103-2 11.7 17.0 11.9 11.1 12.3 12.6 ND ND ND ND Q-104-1 11.3 16.6 10.0 10.5 13.0 10.7 ND ND ND ND Q-104-2 11.8 17.1 11.6 10.7 11.5 11.3 ND ND ND ND Q-105-1 11.5 16.8 11.2 11.4 12.0 12.9 ND ND ND ND Q-105-2 11.7 17.0 11.2 10.4 13.9 11.9 ND ND ND ND Q-106-2 11.9 17.2 10.5 12.1 13.7 14.1 ND ND ND ND Q-106-3 11.4 16.7 11.4 10.4 12.7 12.3 ND ND ND ND Q-107-2 11.5 16.8 10.9 9.7 13.4 12.1 ND ND ND ND Q-107-3 11.6 16.9 10.6 11.1 12.1 14.5 ND ND ND ND Q-108-1 12 17.3 11.7 11.9 13.7 12.1 ND ND ND ND Q-108-2 11.5 16.8 10.6 9.2 12.7 13.2 ND ND ND ND Q-109-1 11.9 17.2 11.1 11.1 14.3 14.8 ND ND ND ND Q-109-2 11.8 17.1 9.8 11.3 14.0 12.6 ND ND ND ND Q-111-1 12.3 17.6 10.5 (1) 15.0 3.9 ND (1) ND ND Q-111-2 12.4 17.7 10.5 13.4 14.4 3.8 ND ND ND ND Q-112-1 11.9 17.2 9.5 11.4 13.2 3.5 ND ND ND ND Q-112-2 11.3 16.6 9.1 10.7 12.8 1.3 ND ND ND ND Q-113-1 11.5 16.8 11.3 12.2 13.4 2.5 ND ND ND ND Q-113-2 10.8 16.1 9.4 10.1 12.2 1.3 ND ND ND ND Q-114-1 11.1 16.4 11.0 11.8 12.9 2.7 ND ND ND ND Q-114-2 12.8 18.1 11.8 13.2 15.9 3.8 ND ND ND ND Q-115-1 12.1 17.4 13.0 12.1 13.7 1.7 ND ND ND ND Q-115-2 11.5 16.8 10.3 11.7 13.4 3.2 ND ND ND ND Q-116-1 13.1 18.4 11.5 13.1 15.5 4.8 ND ND ND ND Q-116-3 12 17.3 10.7 11.1 12.6 3.3 ND ND ND ND Outer Q-201-1 12.7 18.0 13.0 12.8 15.0 3.4 ND ND ND ND Q-201-2 13.2 18.5 14.0 12.3 16.3 2.6 ND ND ND ND Q-202-1 12.1 17.4 11.4 (1) 12.9 1.5 ND (1) ND ND Q-202-2 12.8 18.1 11.1 10.7 12.6 1.5 ND ND ND ND Q-203-1 13.2 18.5 10.9 13.1 15.9 4.7 ND ND ND ND Q-203-2 15.5 20.8 14.0 14.6 17.6 17.7 ND ND ND ND Q-204-1 13.8 19.1 12.1 13.4 15.2 14.1 ND ND ND ND Q-204-2 15.2 20.5 14.1 14.9 16.6 17.6 ND ND ND ND Q-205-1 13.7 19.0 12.4 13.3 16.8 15.3 ND ND ND ND Q-205-4 15.3 20.6 13.3 16.9 18.2 19.1 ND ND ND ND C-15

Table C-IX.1 QUARTERLY DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2022 Location 2022 Normalized Net Dose, MQX Monitoring Quarterly BQ + MDDQ Quarterly Facility Dose, FQ (mrem)

(mrem/std. Qtr.)

Location Baseline, BQ (mrem)

(mrem) 1 2 3 4 1 2 3 4 Outer Q-206-1 13 18.3 11.3 12.3 15.2 15.1 ND ND ND ND (cont'd) Q-206-2 12.7 18.0 11.9 10.4 13.4 13.0 ND ND ND ND Q-207-1 13.3 18.6 11.8 12.9 15.4 13.6 ND ND ND ND Q-207-4 14.1 19.4 12.8 12.9 15.1 14.7 ND ND ND ND Q-208-1 13 18.3 12.4 12.5 15.8 14.4 ND ND ND ND Q-208-2 14.2 19.5 13.4 13.4 15.8 17.4 ND ND ND ND Q-209-1 14.3 19.6 13.4 14.9 17.6 14.9 ND ND ND ND Q-209-4 13.4 18.7 12.1 13.7 14.8 15.9 ND ND ND ND Q-210-1 14.5 19.8 12.2 14.1 16.3 4.0 ND ND ND ND Q-210-4 14.7 20.0 13.6 15.9 17.4 5.4 ND ND ND ND Q-210-5 10.8 16.1 8.9 7.8 10.6 12.2 ND ND ND ND Q-211-1 15.5 20.8 15.5 16.4 17.9 6.0 ND ND ND ND Q-211-2 16.1 21.4 15.4 16.5 16.7 6.7 ND ND ND ND Q-212-1 13.1 18.4 10.6 13.9 16.0 2.9 ND ND ND ND Q-212-2 10.7 16.0 9.6 10.6 11.3 3.3 ND ND ND ND Q-213-1 12.4 17.7 9.9 12.0 14.7 0.4 ND ND ND ND Q-213-2 12.1 17.4 10.3 10.7 14.5 2.5 ND ND ND ND Q-214-1 12.7 18.0 12.8 (1) 16.3 5.4 ND (1) ND ND Q-214-2 13.2 18.5 11.8 13.0 16.5 7.1 ND ND ND ND Q-215-1 12.6 17.9 13.4 13.1 13.9 4.4 ND ND ND ND Q-215-2 13.8 19.1 15.5 17.2 18.3 7.2 ND ND ND ND Q-216-1 15.1 20.4 13.3 14.3 16.6 6.8 ND ND ND ND Q-216-2 14.2 19.5 12.9 15.5 17.2 5.1 ND ND ND ND ND = Not Detected (1) Environmental Dosimetry lost for this period - see Program Exceptions, table D-2 for details C-16

Table C-IX.2 ANNUAL DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2022 Normalized Annual Baseline, Annual Monitoring Location BA + MDDA (mrem) Annual Dose, MA BA (mrem) Facility Dose, FA (mrem/yr)

Other Q-01 49.1 66.1 53.2 ND Q-02 44.7 61.7 48.0 ND Q-03 41.8 58.8 46.4 ND Q-04 42.7 59.7 52.6 ND Q-13 45.7 62.7 43.9 ND Q-16 51.9 68.9 39.5 ND Q-37 57.2 74.2 59.1 ND Q-38 58.0 75.0 65.0 ND Q-41 64.0 81.0 42.0 ND Q-42 62.0 79.0 53.1 ND Inner Q-101-1 55.0 72.0 49.1 ND Q-101-2 43.8 60.8 52.1 ND Q-102-1 54.8 71.8 58.4 ND Q-102-3 61.3 78.3 52.6 ND Q-103-1 52.1 69.1 49.9 ND Q-103-2 59.4 76.4 47.9 ND Q-104-1 50.2 67.2 44.2 ND Q-104-2 50.4 67.4 45.1 ND Q-105-1 56.3 73.3 47.5 ND Q-105-2 49.8 66.8 47.4 ND Q-106-2 48.6 65.6 50.4 ND Q-106-3 43.8 60.8 46.8 ND Q-107-2 44.9 61.9 46.1 ND Q-107-3 45.9 62.9 48.3 ND Q-108-1 49.3 66.3 49.4 ND Q-108-2 46.1 63.1 45.7 ND Q-109-1 46.3 63.3 51.3 ND Q-109-2 47.6 64.6 47.7 ND Q-111-1 51.5 68.5 39.2 ND Q-111-2 49.0 66.0 42.1 ND Q-112-1 47.4 64.4 37.6 ND Q-112-2 48.7 65.7 33.9 ND Q-113-1 47.5 64.5 39.4 ND Q-113-2 48.7 65.7 42.3 ND Q-114-1 49.6 66.6 38.4 ND Q-114-2 50.0 67.0 44.7 ND Q-115-1 47.7 64.7 40.5 ND Q-115-2 48.5 65.5 38.6 ND Q-116-1 46.7 63.7 44.9 ND Q-116-3 43.0 60.0 37.7 ND Outer Q-201-1 50.5 67.5 44.2 ND Q-201-2 47.3 64.3 45.2 ND Q-202-1 56.9 73.9 34.4 ND Q-202-2 52.6 69.6 31.1 ND Q-203-1 53.2 70.2 44.6 ND Q-203-2 56.8 73.8 63.9 ND Q-204-1 48.5 65.5 54.8 ND Q-204-2 54.5 71.5 63.2 ND Q-205-1 53.5 70.5 57.8 ND Q-205-4 66.0 83.0 67.5 ND C-17

Table C-IX.2 ANNUAL DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2022 Normalized Annual Baseline, Annual Monitoring Location BA + MDDA (mrem) Annual Dose, MA BA (mrem) Facility Dose, FA (mrem/yr)

Outer Q-206-1 56.4 73.4 53.9 ND (cont'd) Q-206-2 65.2 82.2 48.7 ND Q-207-1 57.7 74.7 53.7 ND Q-207-4 62.1 79.1 55.5 ND Q-208-1 53.9 70.9 55.1 ND Q-208-2 49.2 66.2 60.0 ND Q-209-1 54.9 71.9 60.8 ND Q-209-4 55.5 72.5 56.5 ND Q-210-1 55.1 72.1 46.6 ND Q-210-4 60.4 77.4 52.3 ND Q-210-5 59.7 76.7 39.5 ND Q-211-1 56.2 73.2 55.8 ND Q-211-2 60.5 77.5 55.3 ND Q-212-1 60.3 77.3 43.4 ND Q-212-2 42.7 59.7 34.8 ND Q-213-1 64.8 81.8 37.0 ND Q-213-2 67.8 84.8 38.0 ND Q-214-1 52.1 69.1 46.0 ND Q-214-2 42.1 59.1 48.4 ND Q-215-1 49.3 66.3 44.8 ND Q-215-2 48.1 65.1 58.2 ND Q-216-1 54.5 71.5 51.0 ND Q-216-2 57.4 74.4 50.7 ND ND = Not Detected C-18

FIGURE C-1 Surface Water - Gross Beta - Stations Q-33 and Q-34 (C)

Collected in the Vicinity of QCNPS, 2000 - 2022 Q-33 Cordova 12.0 10.0 8.0 pCi/L 6.0 4.0 2.0 0.0 01-01-00 10-01-05 07-02-11 04-01-17 12-31-22 Q-34 (C) Camanche 12.0 10.0 8.0 pCi/L 6.0 4.0 2.0 0.0 01-01-00 10-01-05 07-02-11 04-01-17 12-31-22 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 C-19

FIGURE C-2 Surface Water - Tritium - Stations Q-33 and Q-34 (C)

Collected in the Vicinity of QCNPS, 2000 - 2022 Q-33 Cordova 500 400 300 pCi/L 200 100 0

01-01-00 10-01-05 07-02-11 04-01-17 12-31-22 Q-34 (C) Camanche 500 400 300 pCi/L 200 100 0

01-01-00 10-01-05 07-02-11 04-01-17 12-31-22 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 C-20

FIGURE C-3 Ground Water - Tritium - Stations Q-35 and Q-36 Collected in the Vicinity of QCNPS, 2000 - 2022 Q-35 McMillan Well 500 400 300 pCi/L 200 100 0

12-31-99 09-30-05 07-01-11 03-31-17 12-30-22 Q-36 Cordova Well 500 400 300 pCi/L 200 100 0

12-31-99 09-30-05 07-01-11 03-31-17 12-30-22 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 C-21

FIGURE C-4 Air Particulates - Gross Beta- Stations Q-01 and Q-02 Collected in the Vicinity of QCNPS, 2000 - 2022 Q-01 Onsite No. 1 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 10-06-05 07-06-11 04-04-17 01-02-23 Q-02 Onsite No. 2 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 10-06-05 07-06-11 04-04-17 01-02-23 C-22

FIGURE C-5 Air Particulates - Gross Beta- Stations Q-03 and Q-04 Collected in the Vicinity of QCNPS, 2000 - 2022 Q-03 Onsite No. 3 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 01-07-00 10-06-05 07-06-11 04-04-17 01-02-23 Q-04 Nitrin 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 01-07-00 10-06-05 07-06-11 04-04-17 01-02-23 C-23

FIGURE C-6 Air Particulates - Gross Beta- Station Q-07 (C)

Collected in the Vicinity of QCNPS, 2000 - 2010 Q-07 (C) Clinton 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 03-19-02 05-29-04 08-09-06 10-19-08 12-30-10 This location was removed from the program in January 2011 due to updated annual average meteorology.

This data is retained in the report for historical comparision.

C-24

FIGURE C-7 Air Particulates - Gross Beta- Stations Q-13 and Q-16 Collected in the Vicinity of QCNPS, 2005 - 2022 Q-13 Princeton 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 07-08-05 05-06-11 03-03-17 12-30-22 Q-16 Low Moor 60.0 50.0 40.0 30.0 20.0 10.0 0.0 07-08-05 05-06-11 03-03-17 12-30-22 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 C-25

FIGURE C-8 Air Particulates - Gross Beta- Stations Q-37 and Q-38 Collected in the Vicinity of QCNPS, 2005 - 2022 Q-37 Meredosia Q-13 Road Princeton 60.0 60.0 50.0 50.0 10E-03 pCi/m3 40.0 40.0 10E-03 pCi/m3 30.0 30.0 20.0 20.0 10.0 10.0 0.0 07-08-05 0.0 05-06-11 03-03-17 12-30-22 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 Q-13 Princeton Q-38 Fuller Road 60.0 70.0 50.0 60.0 40.0 50.0 10E-03 pCi/m3 30.0 40.0 20.0 30.0 10.0 20.0 0.0 10.0 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 0.0 07-01-05 05-02-11 03-02-17 01-01-23 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 C-26

FIGURE C-9 Air Particulates - Gross Beta- Station Q-41 Collected in the Vicinity of QCNPS, 2009 - 2022 Q-41 Camanche 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 01-03-09 09-02-13 05-02-18 12-30-22 Air Particulates - Gross Beta- Station Q-42 (C)

Collected in the Vicinity of QCNPS, 2010 - 2022 Q-42 LeClaire (Control) 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 12-31-10 12-31-14 12-31-18 12-31-22 C-27

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

Intentionally left blank Analytics Environmental Radioactivity Cross Check Program Table D.1 Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value March 2022 E13706 Milk Sr-89 pCi/L 80.3 96.8 0.83 A Sr-90 pCi/L 12.7 12.6 1.01 A E13707 Milk Ce-141 pCi/L 62.3 65 0.96 A Co-58 pCi/L 158 164 0.96 A Co-60 pCi/L 286 302 0.95 A Cr-51 pCi/L 314 339 0.93 A Cs-134 pCi/L 155 182 0.85 A Cs-137 pCi/L 210 223 0.94 A Fe-59 pCi/L 211 185 1.14 A I-131 pCi/L 88.0 96.7 0.91 A Mn-54 pCi/L 169 164 1.03 A Zn-65 pCi/L 238 246 0.97 A E13708 Charcoal I-131 pCi 79.9 87.1 0.92 A E13709 AP Ce-141 pCi 60.9 42.0 1.45 N(1)

Co-58 pCi 118 107 1.11 A Co-60 pCi 218 196 1.11 A Cr-51 pCi 251 221 1.14 A Cs-134 pCi 129 118 1.09 A Cs-137 pCi 156 145.0 1.07 A Fe-59 pCi 124 120.0 1.03 A Mn-54 pCi 120 107 1.12 A Zn-65 pCi 162 160 1.01 A E13710 Soil Ce-141 pCi/g 0.123 0.103 1.19 A Co-58 pCi/g 0.254 0.263 0.97 A Co-60 pCi/g 0.493 0.483 1.02 A Cr-51 pCi/g 0.603 0.543 1.11 A Cs-134 pCi/g 0.268 0.292 0.92 A Cs-137 pCi/g 0.399 0.431 0.93 A Fe-59 pCi/g 0.320 0.296 1.08 A Mn-54 pCi/g 0.263 0.263 1.00 A Zn-65 pCi/g 0.407 0.395 1.03 A E13711 AP Sr-89 pCi 83.2 97.4 0.85 A Sr-90 pCi 12.7 12.7 1.00 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 22-04 (Page 1 of 2)

Analytics Environmental Radioactivity Cross Check Program Table D.1 Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value September 2022 E13712 Milk Sr-89 pCi/L 71.1 89.1 0.80 A Sr-90 pCi/L 12.0 13.6 0.88 A E13713 Milk Ce-141 pCi/L 148 161 0.92 A Co-58 pCi/L 178 189 0.94 A Co-60 pCi/L 229 260 0.88 A Cr-51 pCi/L 486 456 1.07 A Cs-134 pCi/L 220 252 0.87 A Cs-137 pCi/L 203 222 0.92 A Fe-59 pCi/L 174 173 1.01 A I-131 pCi/L 75.9 94.2 0.81 A Mn-54 pCi/L 269 282 0.95 A Zn-65 pCi/L 364 373 0.97 A E13714 Charcoal I-131 pCi 81.4 83.6 0.97 A E13715 AP Ce-141 pCi 102 91 1.12 A Co-58 pCi 118 107 1.11 A Co-60 pCi 207 147 1.41 N(2)

Cr-51 pCi 310 257 1.21 W Cs-134 pCi 148 142 1.04 A Cs-137 pCi 137 125 1.10 A Fe-59 pCi 115 98 1.18 A Mn-54 pCi 168 159 1.05 A Zn-65 pCi 240 211 1.14 A E13716 Soil Ce-141 pCi/g 0.288 0.284 1.01 A Co-58 pCi/g 0.320 0.334 0.96 A Co-60 pCi/g 0.445 0.459 0.97 A Cr-51 pCi/g 0.883 0.805 1.10 A Cs-134 pCi/g 0.410 0.446 0.92 A Cs-137 pCi/g 0.447 0.465 0.96 A Fe-59 pCi/g 0.314 0.305 1.03 A Mn-54 pCi/g 0.489 0.499 0.98 A Zn-65 pCi/g 0.666 0.660 1.01 A E13717 AP Sr-89 pCi 87.5 98.3 0.89 A Sr-90 pCi 12.6 15.0 0.84 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 (2) See NCR 22-21 (Page 2 of 2)

DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Table D.2 Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Range Value February 2022 22-GrF46 AP Gross Alpha Bq/sample 0.402 1.20 0.36 - 2.04 A Gross Beta Bq/sample 0.669 0.68 0.341 - 1.022 A 22-MaS46 Soil Ni-63 Bq/kg 645 780 546 - 1014 A Tc-99 Bq/kg 526 778 545 - 1011 N(3) 22-MaSU46 Urine Cs-134 Bq/L 1.67 1.77 1.24 - 2.30 A Cs-137 Bq/L 1.50 1.56 1.09 - 2.03 A Co-57 Bq/L 4.93 5.39 3.77 - 7.01 A Co-60 Bq/L 2.13 2.06 1.44 - 2.68 A Mn-54 Bq/L 4.83 5.08 3.56 - 6.60 A U-234 Bq/L 0.142 0.0074 0.0052 - 0.0096 N(4)

U-238 Bq/L 0.0254 0.0103 0.0072 - 0.0134 N(4)

Zn-65 Bq/L 4.71 4.48 3.14 - 5.82 A 22-MaW46 Water Ni-63 Bq/L 28.6 34.0 23.8 - 44.2 A Tc-99 Bq/L 8.59 7.90 5.5 - 10.3 A 22-RdV46 Vegetation Cs-134 Bq/sample 6.61 7.61 5.33 - 9.89 A Cs-137 Bq/sample 1.50 1.52 1.06 - 1.98 A Co-57 Bq/sample 5.11 5.09 3.56 - 6.62 A Co-60 Bq/sample 0.0162 (1) A Mn-54 Bq/sample 2.42 2.59 1.81 - 3.37 A Sr-90 Bq/sample 0.684 0.789 0.552 - 1.026 A Zn-65 Bq/sample 1.44 1.47 1.03 - 1.91 A August 2022 22-MaS47 Soil Ni-63 Bq/kg 14.6 (1) A Tc-99 Bq/kg 994 1000 700 - 1300 A 22-MaW47 Water Ni-63 Bq/L 24.4 32.9 23.0 - 42.8 A Tc-99 Bq/L 1.9 (1) N(5) 25-RdV47 Vegetation Cs-134 Bq/sample 0.032 (1) A Cs-137 Bq/sample 0.891 1.08 0.758 - 1.408 A Co-57 Bq/sample 0.006 (1) A Co-60 Bq/sample 4.04 4.62 3.23 - 6.01 A Mn-54 Bq/sample 2.01 2.43 1.70 - 3.16 A Sr-90 Bq/sample 1.25 1.60 1.12 - 2.08 W Zn-65 Bq/sample 6.16 7.49 5.24 - 9.74 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) DOE/MAPEP 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) Tc-99 soil cross-checks done for TBE information only - not required (4) See NCR 22-05 (5) See NCR 22-22 (Page 1 of 1)

ERA Environmental Radioactivity Cross Check Program Table D.3 Teledyne Brown Engineering Environmental Services Identification TBE Reported Known Acceptance Month/Year Matrix Nuclide Units (a) Evaluation (b)

Number Value Value Limits March 2022 MRAD-36 Water Am-241 pCi/L 68.3 74.6 51.2 - 95.4 A Fe-55 pCi/L 797 1140 670 - 1660 A Pu-238 pCi/L 146 147 88.4 - 190 A Pu-239 pCi/L 69.9 71.9 44.5 - 88.6 A Soil Sr-90 pCi/kg 8050 6720 2090 - 10500 A AP Fe-55 pCi/filter 148 127 46.4 - 203 A Pu-238 pCi/filter 29.9 29.6 22.3 - 36.4 A Pu-239 pCi/filter 51.6 49.7 37.2 - 60.0 A U-234 pCi/filter 59.9 67.3 49.9 - 78.9 A U-238 pCi/filter 59.0 66.7 50.4 - 79.6 A GR-A pCi/filter 95.6 94.2 49.2 - 155 A GR-B pCi/filter 71.2 66.8 40.5 - 101 A April 2022 RAD-129 Water Ba-133 pCi/L 61.7 62.9 52.3 - 69.2 A Cs-134 pCi/L 80.9 81.6 68.8 - 89.8 A Cs-137 pCi/L 37.4 36.6 32.1 - 43.3 A Co-60 pCi/L 103 97.4 87.7 - 109 A Zn-65 pCi/L 318 302 272 - 353 A GR-A pCi/L 26.9 20.8 10.4 - 28.3 A GR-B pCi/L 49.7 51.0 34.7 - 58.1 A U-Nat pCi/L 56.3 68.9 56.3 - 75.8 A H-3 pCi/L 17,000 18,100 15,800 - 19,000 A Sr-89 pCi/L 65.3 67.9 55.3 - 76.1 A Sr-90 pCi/L 42.1 42.7 31.5 - 49.0 A I-131 pCi/L 25.7 26.2 21.8 - 30.9 A September 2022 MRAD-37 Water Am-241 pCi/L 111 96.2 66.0 - 123 A Fe-55 pCi/L 850 926 544 - 1350 A Pu-238 pCi/L 62.1 52.6 31.6 - 68.2 A Pu-239 pCi/L 139.5 117 72.5 - 144 A Soil Sr-90 pCi/kg 3350 6270 1950 - 9770 A U-234 pCi/kg 1684 3350 1570 - 4390 A (2)

U-238 pCi/kg 1658 3320 1820 - 4460 N AP Fe-55 pCi/filter 71.9 122 44.5 - 195 A Pu-238 pCi/filter 38.8 29.9 22.6 - 36.7 N(1)

Pu-239 pCi/filter 14.5 13.0 9.73 - 15.7 A U-234 pCi/filter 78.0 71.5 53.0 - 83.8 A U-238 pCi/filter 79.7 70.9 53.5 - 84.6 A GR-A pCi/filter 62.8 55.5 29.0 - 91.4 A GR-B pCi/filter 70.9 64.8 39.3 - 97.9 A October 2022 RAD-131 Water Ba-133 pCi/L 76.2 79.4 66.6 - 87.3 A Cs-134 pCi/L 28.0 30.5 23.9 - 33.6 A Cs-137 pCi/L 202 212 191 - 235 A Co-60 pCi/L 52.4 51.4 46.3 - 59.1 A Zn-65 pCi/L 216 216 194 - 253 A GR-A pCi/L 19.7 16.9 8.28 - 23.7 A GR-B pCi/L 49.8 53.0 36.1 - 60.0 A (3)

U-Nat pCi/L 10.54 8.53 6.60 - 9.88 N H-3 pCi/L 13,900 15,100 13,200 - 16,600 A Sr-89 pCi/L 59.7 64.5 52.3 - 72.5 A Sr-90 pCi/L 32.9 37.3 27.4 - 43.0 A I-131 pCi/L 26.9 24.4 20.2 - 28.9 A (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 22-19 (2) U soil cross-checks done for TBE information only - not required (3) See NCR 22-20 (Page 1 of 1)

APPENDIX E ERRATA DATA

There is no errata data for 2022.

APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Intentionally left blank Docket No: 50-254 50-265 QUAD CITIES NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2022 Prepared By Teledyne Brown Engineering Environmental Services Quad Cities Nuclear Power Station Cordova, IL 61242 April 2023

Intentionally left blank Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction...................................................................................................................... 4 A. Objectives of the RGPP ....................................................................................... 4 B. Implementation of the Objectives ........................................................................ 4 C. Program Description ............................................................................................ 5 III. Program Description....................................................................................................... 6 A. Sample Analysis .................................................................................................. 6 B. Data Interpretation ............................................................................................... 6 IV. Results and Discussion ................................................................................................. 8 A. Groundwater Results ........................................................................................... 8 B. Summary of Results - Inter-laboratory Comparison Program............................. 9 C. Leaks, Spills, and Releases ................................................................................ 9 C. Trends ................................................................................................................. 9 E. Investigations ....................................................................................................... 9 F. Actions Taken ...................................................................................................... 9 i

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Quad Cities Nuclear Power Station, 2022 Figures Figure A-1 Sampling Locations Near the Site Boundary of the Quad Cities Nuclear Power Station, 2022 Figure A-2 Sentinel Monitoring Point Locations, Quad Cities Nuclear Power Station, 2022 Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium, Strontium and Gross Alpha in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table B-I.3 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2022 Table B-II.1 Concentrations of Tritium in Groundwater Samples Collected and Analyzed by Quad Cities Station Personnel, 2022 ii

I. Summary and Conclusions In 2006, Constellation undertook a Fleetwide Assessment of groundwater at and in the vicinity of its nuclear power generating facilities for the presence of radionuclides. The data collected from the Quad Cities Station as part of the Fleetwide Assessment was summarized in a report entitled "Hydrogeologic Investigation Report, Fleetwide Assessment, Quad Cities Generation Station, Cordova, Illinois", dated September 2006. This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Quad Cities Nuclear Power Station (QCNPS) by Constellation Nuclear covers the period 01 January 2022 through 31 December 2022.

The Quad Cities Nuclear Power Station (QCNPS) has experienced leaks from underground piping and spills from systems containing radioactive water over its 40+ year history. These incidents have created a few areas of localized contamination within the owner-controlled area. The liquid scintillation analyses of groundwater in some of these areas show measurable concentrations of tritium (H-3).

On March 28, 2018, approximately three to four feet of water was observed in a Radwaste Piping Vault, located adjacent to monitoring well QC-GP-18. Samples were collected from the water in the vault as well as the groundwater in QC-GP-18. Both samples had tritium concentration of approximately 4.5 million pCi/L. Approximately 5,000 gallons of water was pumped from the vault and processed through the Stations Radwaste System on March 28, 2018.

Remediation of the groundwater near the RW Pipe Vault began on March 29, 2018 via pumping from monitoring well QC-GP-18 and processing through the Stations Radwaste System.

On March 29, 2018, the station contacted the Illinois Environmental Protection Agency (IEPA) and Illinois Emergency Management Agency (IEMA) to report a release of a radionuclide pursuant to 35 Ill. Adm. Code 1010.202. The station also notified the Nuclear Regulatory Commission (NRC) of these reports to state agencies to satisfy 10CFR50.72(b)(2)(xi), notification of the NRC for any event related to the health and safety of the public for which a notification to other government agencies has been or will be made (EN #53299).

The cause of release into the vault and QC-GP-18 was determined to be a leaking pipe clamp located within the RW Pipe Vault and degraded seams in the concrete vault which allowed water to seep from the vault into the surrounding groundwater. The pipe clamp was repaired and the concrete/degraded seams in the vault sealed.

On April 2, 2018, a remediation well (RW-1) was installed near the vault and QC-GP-18 to assist in remediating the tritium activity in groundwater. The remediation well began pumping groundwater on April 10, 2018 for processing through the Stations Radwaste System. On May 2, 2018 effluent from RW-1 was routed to the Discharge bay for release. On May 7, 2018 effluent from QC-GP-18 was routed to the Discharge Bay for release. On November 24, 2018, both well remediation pumps were shut down for the winter season.

Between April 16, 2019 and November 6, 2019, approximately 1.1 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes. Between March 12, 2020 and December 22, 2020, approximately 1.8 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes. There was no active pumping for remediation in the vicinity of the RW Pipe Vault in 2021 and 2022 due to an underground Fire Protection modification in the vicinity of the RW Pipe Vault.

On March 10, 2021, groundwater sample results from well QC-GP-12 showed a tritium concentration of 2.8 million pCi/L. Sample results from nearby well QC-GP-16 showed a tritium concentration of 1.9 million pCi/L. QC-GP-12 and QC-GP-16 are located in the Condensate Storage Tank and ancillary piping area.

Five additional groundwater monitoring wells were installed (Stick wells #1, #2,

4, and #5, and groundwater monitoring well MW-QC-117S) for assistance with leak detection location and groundwater monitoring. A new remediation well was installed (MW-R-2D2) and remediation commenced on March 15, 2021.

On March 10, 2021, the station contacted the Illinois Environmental Protection Agency (IEPA) and Illinois Emergency Management Agency (IEMA) to report a release of a radionuclide pursuant to 35 Ill. Adm. Code 1010.202. The station also notified the Nuclear Regulatory Commission (NRC) of the report to state agencies to satisfy 10CFR50.72(b)(2)(xi), notification of the NRC for any event related to the health and safety of the public for which a notification to other government agencies has been or will be made (EN #55132).

As part of the investigation to identify the source, the B Condensate Storage Tank was drained and inspected. During the inspection a hole measuring 1/4 x 5/16 (approximately the width of a pencil) was discovered on the tank floor which allowed water to seep into the surrounding groundwater. The hole was repaired prior to returning to service. In October 2021 the B Condensate Storage Tank floor was restored to original tank floor thickness and A Condensate Storage Tank floor was returned to original tank floor thickness in January 2022.

On March 12, 2021, an extraction well (MW-R-2D2) was installed near the Contaminated Condensate Storage Tank area to assist in remediating the tritium activity in groundwater. The extraction well began pumping groundwater on March 15, 2021, with effluent routed to Quad Cities Stations permitted outfall 001/002.

Between March 15, 2021, and December 19, 2022, approximately 29.2 million gallons of groundwater was pumped from the vicinity of the Condensate Storage Tank and ancillary piping area for remediation purposes. Remediation out of MW-R-2D2 is on-going. Prior to remediation QC-GP-12 tritium concentration was 3.2 million pCi/L. As of October 28, 2022, QC-GP-12 tritium concentration was 10,300 pCi/L.

The RGPP designates wells into categories. Well designation categories include background, mid-field, perimeter, source and idle.

This report covers groundwater samples collected from the environment on station property in 2022. During that period, RGPP samples were collected from 37 locations.

2022 sample locations included 31 designated monitoring wells and 4 production wells (two of which are used for site drinking water), and 2 remediation wells.

Sample frequency and analysis varies with well designation. Typical frequency/analysis include quarterly for tritium, annual for strontium, biennial for gamma, gross alpha, and every five years for iron-55 (Fe-55) and nickel-63 (Ni-63), depending on the designated well category. Samples from 19 of the designated monitoring wells were collected by a contractor (Environmental Inc.)

and analyzed by a contract lab (Teledyne Brown) and onsite station personnel.

The remaining sample locations were collected by site personnel and analyzed for tritium onsite by station personnel and by Teledyne Brown for tritium and other parameters.

In the case of tritium, Constellation specified that its contract laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

Most of the tritium that was detected in groundwater at the Station is on the south and west side of the Reactor/Turbine buildings. Tritium concentrations ranged from less than the LLD of 200 pCi/L up to 60,000 pCi/L in a monitoring well.

No gamma-emitting radionuclides were detected above their respective MDCs except for naturally occurring potassium-40 (K-40) in three samples with concentrations ranging from 26 - 50 pCi/L.

Strontium-89 (Sr-89) was not detected at concentrations greater than the Lower Limit of Detection (LLD) of 10.0 pCi/L. Strontium-90 (Sr-90) was detected at one location with concentrations ranging from 3.3 - 6.8 pCi/L.

Gross Alpha analyses in the dissolved and suspended fractions were performed at sixteen locations. Gross Alpha (dissolved) was detected at two locations with concentrations ranging from 1.4 - 4.6 pCi/L. Gross Alpha (suspended) was not detected at concentrations greater than the Lower Limit of Detection (LLD).

Select Transuranic/Hard-To-Detect analyses were performed on 1 monitoring well. The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, U-238, Fe-55 and Ni-63. U-234 was detected at one location with a concentration of 1.35 pCi/L. U-238 was detected at one location at a concentration of 1.11 pCi/L. U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally-occurring Radium (Uranium) Decay Series. All other Select Transuranic/Hard-To-Detect nuclides were not detected at concentrations greater than their respective MDCs.

In assessing all the data gathered for this report, it was concluded that the operation of QCNPS had no adverse radiological impact on the environment offsite of QCNPS.

II. Introduction The Quad Cities Nuclear Power Station (QCNPS), consisting of two 2957 MWth boiling water reactor owned and operated by Constellation Corporation, is located in Cordova, Illinois along the Mississippi River. Unit No. 1 went critical on 16 March 1972. Unit No. 2 went critical on 02 December 1973. The site is located in northern Illinois, approximately 182 miles west of Chicago, Illinois.

A. Objectives of the RGPP The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.

3. Perform routine water sampling and radiological analysis of water from selected locations.

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives.

The objectives identified have been implemented at QCNPS as discussed below:

1. Constellation and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators in station specific reports.

2. The QCNPS reports describe the local hydrogeologic regime.

Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3. QCNPS will continue to perform routine sampling and radiological analysis of water from selected locations.

4. QCNPS has implemented procedures to identify and report leaks, spills, or other detections with potential radiological significance in a timely manner.

5. QCNPS staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 & A-2, Appendix A.

Groundwater Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following regulatory methods.

Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, analysis and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, inter-laboratory cross-check programs, as well as nuclear industry audits.

Station personnel review and evaluate all analytical data deliverables after initial review by the contractor.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

III. Program Description This section covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2022.

A. Sample Analysis This section describes the general analytical methodologies used by TBE and station personnel to analyze the environmental samples for radioactivity for the Quad Cities Nuclear Power Station RGPP in 2022.

Sample analysis and frequency is based upon well location, assessed risk, and site hydrogeology as described in the RGPP.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater

2. Concentrations of strontium in groundwater

3. Concentrations of tritium in groundwater

4. Concentration 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-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 QCNPS becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, QCNPS was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Constellation reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Constellation reports the TPU by following the result with plus or minus +/- the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the Annual Radiological Environmental Operating Report (AREOR) for samples analyzed by TBE.

Gamma spectroscopy results for each type of sample were grouped as follows:

For groundwater 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140 and La-140 were reported in 2022.

IV. Results and Discussion A. Groundwater Results Groundwater samples were collected from on-site wells in accordance with the station RGPP. Analytical results and anomalies are discussed below:

Tritium Samples from all locations were analyzed for tritium activity (Table B-I.1 &

B-II.1 Appendix B). Tritium values ranged from less than LLD of 200 pCi/L to 60,000 pCi/L. Samples obtained near the site boundaries were <200 pCi/L. Based on Quad Cities 2022 GHD Hydrogeological Investigation Report, there is no risk of exposure associated with groundwater ingestion off Station property, there is no risk of exposure associated with groundwater ingestion at the Station and there is no current risk of exposure associated with surface water users off the Station property. The location most representative of potential offsite user of drinking water was

<200 pCi/L.

Strontium Sr-89 was not detected above the Lower Limit of Detection of 10.0 pCi/L.

Sr-90 was detected at two locations with concentrations ranging from 3.3 - 6.8 pCi/L. All other sample results were not above the Lower Limit of Detection (LLD) of 1.0 pCi/L. (Table B-I.1 Appendix B)

Gross Alpha (dissolved and suspended)

Gross Alpha analyses in the dissolved and suspended fractions were performed on designated groundwater locations in 2022. Gross Alpha (dissolved) was detected at two locations with concentrations ranging from 1.4 - 4.6 pCi/L. Gross Alpha (suspended) was not detected at concentrations greater than the LLD.

Gamma Emitters Gamma analyses were performed on designated groundwater locations.

Naturally occurring potassium-40 (K-40) was detected at three locations with concentrations ranging from 26 - 50 pCi/L. All other sample results were not above the Lower Limit of Detection (LLD)

(Table B-I.2, Appendix B).

Select Transuranic/Hard-To-Detect Select Transuranic/Hard-To-Detect analyses were performed on 1 groundwater location. The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, U-238, Fe-55 and Ni-63.

U-234 was detected at one location with a concentration of 1.35 pCi/L.

U-238 was detected at one location with a concentration of 1.11 pCi/L.

U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally-occurring Radium (Uranium) Decay Series. The concentrations of U-234 and U-238 discussed above are considered to be background and are not the result of station effluents. All other Select Transuranic/Hard-To-Detect nuclides were not detected at concentrations greater than their respective MDCs.

(Table B-I.3 Appendix B).

B. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the Annual Radiological Environmental Operating Report.

C. Leaks, Spills, and Releases No leaks, spills or releases were identified during the year.

D. Trends Overall, groundwater tritium concentrations have been decreasing over time at the Station.

E. Investigations Currently no investigations are on-going.

F. Actions Taken

1. Compensatory Actions There have been no station events requiring compensatory actions at the Quad Cities Nuclear Power Station in 2022.

2. Actions to Recover/Reverse Plumes Remediation of the March 28, 2018 Radwaste Pipe Vault began on March 29, 2018 via pumping of groundwater from monitoring well QC-GP-18 and processing through the Stations Radwaste System.

On April 2, 2018, a remediation well (RW-1) was installed near the vault and QC-GP-18 to assist in remediating the tritium activity in groundwater. The remediation well began pumping groundwater on April 10, 2018 for processing through the Stations Radwaste System.

On May 2, 2018 effluent from RW-1 was routed to the Discharge bay for release. On May 7, 2018 effluent from QC-GP-18 was routed to the Discharge Bay for release. On November 24, 2018, both well remediation pumps were shut down for the winter season. Between March 29, 2018, and November 24, 2018, approximately 1.8 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes. Between April 16, 2019 and November 6, 2019, approximately 1.1 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes.

Between March 12, 2020 and December 22, 2020, approximately 1.8 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes. There was no active pumping for remediation in the vicinity of the RW Pipe Vault in 2021 and 2022 due to an underground Fire Protection modification in the vicinity of the RW Pipe Vault.

On March 12, 2021, an extraction well (MW-R-2D2) was installed near the Contaminated Condensate Storage Tank area to assist in remediating the tritium activity in groundwater. The extraction well began pumping groundwater on March 15, 2021, with effluent routed to Quad Cities Stations permitted outfall 001/002. Between March 15, 2021, and December 19, 2022, approximately 29.2 million gallons of groundwater was pumped from the vicinity of the Condensate Storage Tank and ancillary piping area for remediation purposes. Remediation out of MW-R-2D2 is on-going. Quad Cities Station Migration Control Plan (MCP) continues to employ Monitored Natural Attenuation for remediation of legacy H-3 plumes.

APPENDIX A LOCATION DESIGNATION

Intentionally left blank TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations Quad Cities Nuclear Power Station, 2022 Site Site Type Well Designation Minimum Sample Frequency MW-QC-1 Monitoring Well Source Quarterly MW-QC-2 Monitoring Well Mid-Field Semi-Annual MW-QC-3 Monitoring Well Source Quarterly MW-QC-101I Monitoring Well Idle Not Required MW-QC-101S Monitoring Well Idle Not Required MW-QC-102D Monitoring Well Perimeter Annual MW-QC-102I Monitoring Well Mid-Field Semi-Annual MW-QC-102S Monitoring Well Perimeter Annual MW-QC-103I Monitoring Well Source Quarterly MW-QC-104S Monitoring Well Source Quarterly MW-QC-105I Monitoring Well Source Quarterly MW-QC-106I Monitoring Well Mid-Field Semi-Annual MW-QC-106S Monitoring Well Mid-Field Semi-Annual MW-QC-107I Monitoring Well Background Annual MW-QC-108D Monitoring Well Perimeter Annual MW-QC-108I Monitoring Well Mid-Field Semi-Annual MW-QC-108S Monitoring Well Perimeter Annual MW-QC-109I Monitoring Well Mid-Field Semi-Annual MW-QC-109S Monitoring Well Perimeter Annual MW-QC-110I Monitoring Well Idle Not Required MW-QC-111D1 Monitoring Well Idle Not Required MW-QC-111D2 Monitoring Well Idle Not Required MW-QC-111I Monitoring Well Idle Not Required MW-QC-112I Monitoring Well Perimeter Annual MW-QC-113I Monitoring Well Idle Not Required MW-QC-114I Monitoring Well Idle Not Required MW-QC-115S Monitoring Well Idle Not Required MW-QC-116S Monitoring Well Idle Not Required MW-QC-117S Monitoring Well Source Quarterly MW-R-2D2 Remediation Well Mid-Field Semi-Annual SURFACE WATER #1 Surface Water Idle Not Required SURFACE WATER #2 Surface Water Idle Not Required WELL #1 Production Well Idle Not Required WELL #5 Production Well Idle Not Required WELL #6 LITTLE FISH Production Well Idle Not Required WELL #7 BIG FISH WELL Production Well Mid-Field Semi-Annual WELL #8 FIRE TRAINING WELL Production Well Idle Not Required WELL #9 Dry Cask Storage Production Well Background Annual WELL #10 FISH HOUSE WELL Production Well Idle Not Required WELL #11 SPRAY CANAL WELL Production Well Idle Not Required STP SAND POINT WELL Production Well Idle Not Required QC-GP-1 Sentinel Well Source Quarterly QC-GP-2 Sentinel Well Source Quarterly QC-GP-3 Sentinel Well Idle Not Required QC-GP-4 Sentinel Well Source Quarterly QC-GP-5 Sentinel Well Source Quarterly QC-GP-6 Sentinel Well Idle Not Required QC-GP-7 Sentinel Well Idle Not Required QC-GP-8 Sentinel Well Idle Not Required QC-GP-9 Sentinel Well Source Quarterly QC-GP-10 Sentinel Well Source Quarterly QC-GP-11 Sentinel Well Idle Not Required QC-GP-12 Sentinel Well Source Quarterly QC-GP-13 Sentinel Well Idle Not Required QC-GP-14 Sentinel Well Mid-Field Semi-Annual QC-GP-15 Sentinel Well Source Quarterly QC-GP-16 Sentinel Well Idle Not Required QC-GP-17 Sentinel Well Source Quarterly QC-GP-18 Sentinel Well Source Quarterly QC-RW-1 Remediation Well Mid-Field Semi-Annual Note: Idle designated wells are not required to be sampled as part of the RGPP A-1

A-2 FIGURE A-1 Sampling Locations Near the Site Boundary of the Quad Cities Nuclear Power Station, 2022

A-3 FIGURE A-2 Sentinel Monitoring Point Locations, Quad Cities Nuclear Power Station, 2022

Intentionally left blank APPENDIX B DATA TABLES

Intentionally left blank TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Gr-A Gr-A SITE DATE H-3 Sr-89 Sr-90 (Dis) (Sus)

MW-QC-1 03/07/22 225 +/- 126 < 8.4 < 0.9 < 7.2 < 4.9 MW-QC-1 05/04/22 < 179 MW-QC-1 08/22/22 < 187 MW-QC-1 10/27/22 268 +/- 135 MW-QC-2 03/07/22 < 189 MW-QC-2 08/22/22 < 176 MW-QC-3 03/07/22 932 +/- 172 < 6.6 < 0.8 < 0.7 < 1.0 MW-QC-3 05/04/22 1630 +/- 229 MW-QC-3 08/22/22 4740 +/- 532 MW-QC-3 10/27/22 1720 +/- 245 MW-QC-102D 03/08/22 222 +/- 124 MW-QC-102I 03/08/22 < 179 MW-QC-102I 08/22/22 < 192 MW-QC-102S 03/08/22 < 177 MW-QC-103I 03/07/22 < 184 < 6.8 < 0.9 < 0.6 < 0.8 MW-QC-103I 05/04/22 201 +/- 115 MW-QC-103I 08/22/22 < 182 MW-QC-103I 10/27/22 210 +/- 130 MW-QC-104S 03/08/22 1730 +/- 244 < 7.5 < 1.0 1.4 +/- 0.9 < 0.9 MW-QC-104S 05/05/22 361 +/- 126 MW-QC-104S 08/22/22 10100 +/- 1070 MW-QC-104S 10/27/22 60000 +/- 6050 MW-QC-105I 03/08/22 < 184 < 8.3 < 0.9 < 0.6 < 1.3 MW-QC-105I 05/04/22 < 177 MW-QC-105I 08/22/22 < 184 MW-QC-105I 10/28/22 < 190 MW-QC-106I 03/07/22 < 177 MW-QC-106I 08/22/22 < 189 MW-QC-106S 03/07/22 < 187 MW-QC-106S 08/22/22 < 182 MW-QC-107I 03/07/22 < 196 MW-QC-108D 03/07/22 < 183 MW-QC-108I 03/07/22 < 182 MW-QC-108I 08/22/22 < 193 MW-QC-108S 03/07/22 < 175 MW-QC-109I 03/07/22 < 195 MW-QC-109I 08/22/22 < 182 MW-QC-109S 03/07/22 < 189 MW-QC-112I 03/07/22 < 194 MW-QC-117S 03/08/22 < 192 < 8.0 < 0.9 < 0.7 < 1.0 MW-QC-117S 05/04/22 < 192 MW-QC-117S 08/22/22 < 182 MW-QC-117S 10/28/22 < 189 MW-R-2D2 03/10/22 1290 +/- 206 MW-R-2D2 08/23/22 997 +/- 169 QC-GP-1 03/09/22 475 +/- 140 < 9.1 < 0.9 < 2.6 < 1.4 BOLD values = Unable to meet detection limits due to high solids content B-1

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Gr-A Gr-A SITE DATE H-3 Sr-89 Sr-90 (Dis) (Sus)

QC-GP-1 05/04/22 < 197 QC-GP-1 08/23/22 544 +/- 136 QC-GP-1 10/28/22 930 +/- 176 QC-GP-2 03/08/22 < 196 < 7.6 < 0.9 < 3.1 < 2.7 QC-GP-2 05/04/22 1040 +/- 180 QC-GP-2 08/23/22 < 194 QC-GP-2 10/27/22 204 +/- 126 QC-GP-4 03/08/22 2950 +/- 360 < 7.2 < 0.9 < 3.0 < 1.5 QC-GP-4 05/04/22 1500 +/- 221 QC-GP-4 08/23/22 2140 +/- 283 QC-GP-4 10/27/22 2380 +/- 309 QC-GP-5 03/09/22 1020 +/- 184 < 7.8 3.3 +/- 0.6 < 2.3 < 1.5 QC-GP-5 05/04/22 562 +/- 140 < 5.7 6.4 +/- 1.0 QC-GP-5 08/23/22 < 190 < 5.1 4.5 +/- 1.0 QC-GP-5 10/27/22 346 +/- 138 < 9.1 6.8 +/- 0.9 QC-GP-9 03/09/22 1380 +/- 218 < 6.6 < 0.9 < 2.3 < 1.4 QC-GP-9 05/04/22 1040 +/- 175 QC-GP-9 08/23/22 1910 +/- 260 QC-GP-9 10/28/22 1580 +/- 235 QC-GP-10 03/09/22 < 197 < 8.3 < 1.0 < 2.0 < 1.4 QC-GP-10 05/04/22 < 194 QC-GP-10 08/23/22 < 196 QC-GP-10 10/27/22 < 195 QC-GP-12 03/09/22 43500 +/- 4270 < 7.2 < 0.9 < 1.6 < 1.3 QC-GP-12 05/04/22 5640 +/- 621 QC-GP-12 08/24/22 14100 +/- 1470 QC-GP-12 10/28/22 10600 +/- 1120 QC-GP-14 03/10/22 < 177 QC-GP-14 08/23/22 1380 +/- 214 QC-GP-15 03/09/22 206 +/- 128 < 9.0 < 0.9 < 2.5 < 1.3 QC-GP-15 05/04/22 < 189 QC-GP-15 08/23/22 < 187 QC-GP-15 10/27/22 319 +/- 125 QC-GP-17 03/09/22 3450 +/- 415 < 7.7 < 0.9 < 1.6 < 1.3 QC-GP-17 05/04/22 426 +/- 139 QC-GP-17 08/24/22 622 +/- 141 QC-GP-17 10/28/22 614 +/- 139 QC-GP-18 03/09/22 1560 +/- 235 < 9.0 < 0.9 QC-GP-18 05/04/22 825 +/- 151 4.6 +/- 2.4 < 4.1 QC-GP-18 08/23/22 1020 +/- 175 QC-GP-18 10/27/22 10800 +/- 1140 QC-RW-1 03/09/22 30900 +/- 3150 QC-RW-1 08/23/22 10300 +/- 1080 WELL #7 BIG FISH 03/07/22 < 188 WELL #7 BIG FISH 08/22/22 < 171 WELL #9 DRY 03/07/22 < 194 CASK STORAGE BOLD values = Unable to meet detection limits due to high solids content B-2

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 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 I-131 Cs-134 Cs-137 Ba-140 La-140 MW-QC-1 03/07/22 < 17 50 +/- 28 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 10 < 3 MW-QC-2 03/07/22 < 17 < 18 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-3 03/07/22 < 12 < 30 <1 < 1 < 3 < 1 < 3 < 1 < 2 < 2 < 1 < 1 < 7 < 2 MW-QC-102D 03/08/22 < 17 < 37 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-102I 03/08/22 < 12 < 30 <1 < 1 < 3 < 1 < 3 < 2 < 2 < 2 < 2 < 1 < 6 < 2 MW-QC-102S 03/08/22 < 16 < 33 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-103I 03/07/22 < 15 < 32 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-104S 03/08/22 < 15 < 18 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 2 < 2 < 2 < 7 < 2 MW-QC-105I 03/08/22 < 17 < 39 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-106I 03/07/22 < 11 < 12 <1 < 1 < 2 < 1 < 3 < 1 < 2 < 2 < 1 < 1 < 6 < 2 MW-QC-106S 03/07/22 < 13 < 34 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 2 < 2 < 2 < 7 < 3 MW-QC-107I 03/07/22 < 11 < 12 <1 < 1 < 3 < 1 < 2 < 1 < 2 < 3 < 1 < 1 < 7 < 2 MW-QC-108D 03/07/22 < 14 < 15 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-108I 03/07/22 < 17 < 39 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 4 < 2 < 2 < 10 < 3 MW-QC-108S 03/07/22 < 15 < 29 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 3 < 2 < 2 < 8 < 3 B-3 MW-QC-109I 03/07/22 < 11 26 +/- 16 <1 < 1 < 2 < 1 < 2 < 1 < 2 < 2 < 1 < 1 < 6 < 2 MW-QC-109S 03/07/22 < 14 39 +/- 26 <2 < 2 < 3 < 2 < 3 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-112I 03/07/22 < 13 < 17 <1 < 1 < 3 < 2 < 3 < 2 < 3 < 3 < 2 < 2 < 8 < 3 MW-QC-117S 03/08/22 < 14 < 16 <2 < 2 < 3 < 2 < 3 < 2 < 3 < 3 < 2 < 2 < 8 < 2 MW-R-2D2 03/10/22 < 15 < 15 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 11 < 4 QC-GP-1 03/09/22 < 16 < 32 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 5 < 2 < 2 < 11 < 4 QC-GP-2 03/08/22 < 16 < 33 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 11 < 4 QC-GP-4 03/08/22 < 14 < 16 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 11 < 4 QC-GP-5 03/09/22 < 11 < 11 <1 < 1 < 3 < 1 < 2 < 1 < 2 < 4 < 1 < 1 < 8 < 3 QC-GP-9 03/09/22 < 15 < 16 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 12 < 4 QC-GP-10 03/09/22 < 15 < 13 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 11 < 3 QC-GP-12 03/09/22 < 17 < 35 <2 < 2 < 4 < 2 < 4 < 2 < 3 < 5 < 2 < 2 < 13 < 4 QC-GP-14 03/10/22 < 17 < 18 <2 < 2 < 5 < 2 < 4 < 2 < 4 < 5 < 2 < 2 < 12 < 5 QC-GP-15 03/09/22 < 18 < 18 <2 < 2 < 4 < 2 < 4 < 2 < 4 < 6 < 2 < 2 < 13 < 4 QC-GP-17 03/09/22 < 14 < 15 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 11 < 4 QC-GP-18 03/09/22 < 19 < 18 <2 < 2 < 5 < 2 < 4 < 2 < 4 < 6 < 2 < 2 < 14 < 4 QC-RW-1 03/09/22 < 15 < 15 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 12 < 4 WELL #7 BIG FISH 03/07/22 < 15 < 28 <2 < 2 < 4 < 2 < 3 < 2 < 3 < 5 < 2 < 2 < 12 < 4 WELL #9 DRY 03/07/22 < 11 < 11 <1 < 1 < 2 < 1 < 2 < 1 < 2 < 4 < 1 < 1 < 8 < 2 CASK STORAGE

TABLE B-I.3 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2022 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 QC-GP-18 03/09/22 < 0.08 < 0.02 < 0.10 < 0.18 < 0.13 1.35 +/- 0.47 < 0.13 1.11 +/- 0.41 < 119 < 4.9 B-4

TABLE B-II.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED AND ANALYZED BY QUAD CITIES STATION PERSONNEL, 2022 RESULTS IN UNITS OF PCI/LITER COLLECTION SITE DATE ACTIVITY AQUIFER QC-GP-1 03/09/22 <2,000 Sentinel Well QC-GP-1 05/04/22 <2,000 Sentinel Well QC-GP-1 08/23/22 <2,000 Sentinel Well QC-GP-1 10/28/22 <2,000 Sentinel Well QC-GP-2 03/08/22 <2,000 Sentinel Well QC-GP-2 05/04/22 <2,000 Sentinel Well QC-GP-2 08/23/22 <2,000 Sentinel Well QC-GP-2 10/27/22 <2,000 Sentinel Well QC-GP-4 03/08/22 3,470 Sentinel Well QC-GP-4 05/04/22 2,050 Sentinel Well QC-GP-4 08/23/22 2,550 Sentinel Well QC-GP-4 10/27/22 2,880 Sentinel Well QC-GP-5 03/09/22 <2,000 Sentinel Well QC-GP-5 05/04/22 <2,000 Sentinel Well QC-GP-5 08/22/22 <2,000 Sentinel Well QC-GP-5 10/27/22 <2,000 Sentinel Well QC-GP-9 03/09/22 <2,000 Sentinel Well QC-GP-9 05/04/22 <2,000 Sentinel Well QC-GP-9 08/23/22 <2,000 Sentinel Well QC-GP-9 10/28/22 2,150 Sentinel Well QC-GP-10 03/09/22 <2,000 Sentinel Well QC-GP-10 05/04/22 <2,000 Sentinel Well QC-GP-10 08/23/22 <2,000 Sentinel Well QC-GP-10 10/27/22 <2,000 Sentinel Well QC-GP-12 03/09/22 56,200 Sentinel Well QC-GP-12 05/04/22 15,700 Sentinel Well QC-GP-12 08/24/22 20,100 Sentinel Well QC-GP-12 10/28/22 10,300 Sentinel Well QC-GP-14 03/10/22 <2,000 Sentinel Well QC-GP-14 05/05/22 <2,000 Sentinel Well QC-GP-14 08/23/22 <2,000 Sentinel Well QC-GP-14 10/28/22 <2,000 Sentinel Well QC-GP-15 03/10/22 <2,000 Sentinel Well QC-GP-15 05/05/22 <2,000 Sentinel Well QC-GP-15 08/23/22 <2,000 Sentinel Well QC-GP-15 10/28/22 <2,000 Sentinel Well QC-GP-16 03/09/22 <2,000 Sentinel Well QC-GP-16 05/04/22 <2,000 Sentinel Well QC-GP-16 08/24/22 <2,000 Sentinel Well QC-GP-16 10/28/22 <2,000 Sentinel Well QC-GP-17 03/09/22 3,310 Sentinel Well QC-GP-17 05/04/22 < 2000 Sentinel Well QC-GP-17 08/24/22 < 2000 Sentinel Well QC-GP-17 10/28/22 < 2000 Sentinel Well QC-GP-18 03/09/22 <2,000 Sentinel Well QC-GP-18 05/04/22 <2,000 Sentinel Well QC-GP-18 07/19/22 <2,000 Sentinel Well QC-GP-18 08/23/22 <2,000 Sentinel Well QC-GP-18 09/20/22 2,840 Sentinel Well QC-GP-18 10/27/22 10,300 Sentinel Well QC-GP-18 11/15/22 49,900 Sentinel Well QC-GP-18 11/21/22 53,600 Sentinel Well B-5

TABLE B-II.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED AND ANALYZED BY QUAD CITIES STATION PERSONNEL, 2022 RESULTS IN UNITS OF PCI/LITER COLLECTION SITE DATE ACTIVITY AQUIFER QC-GP-18 12/13/22 38,400 Sentinel Well QC-RW-1 03/09/22 37,200 Remediation Well QC-RW-1 05/04/22 37,500 Remediation Well QC-RW-1 07/19/22 15,700 Remediation Well QC-RW-1 08/23/22 11,200 Remediation Well QC-RW-1 09/20/22 12,000 Remediation Well QC-RW-1 10/27/22 8,390 Remediation Well QC-RW-1 11/15/22 8,640 Remediation Well QC-RW-1 12/13/22 10,500 Remediation Well Well #7 03/07/22 <2,000 Production Well Well #7 08/22/22 <2,000 Production Well Well #9 03/07/22 <200 Production Well Well #1 05/20/22 <200 Production Well Well #1 11/01/22 <200 Production Well Well #5 05/20/22 <200 Production Well Well #5 11/01/22 <200 Production Well MW-R-2D2 01/03/22 3,150 Remediation Well MW-R-2D2 01/18/22 2,400 Remediation Well MW-R-2D2 01/31/22 2,690 Remediation Well MW-R-2D2 02/14/22 <2,000 Remediation Well MW-R-2D2 02/28/22 <2,000 Remediation Well MW-R-2D2 03/10/22 <2,000 Remediation Well MW-R-2D2 03/14/22 <2,000 Remediation Well MW-R-2D2 03/28/22 <2,000 Remediation Well MW-R-2D2 04/11/22 <2,000 Remediation Well MW-R-2D2 04/25/22 <2,000 Remediation Well MW-R-2D2 05/05/22 <2,000 Remediation Well MW-R-2D2 05/09/22 <2,000 Remediation Well MW-R-2D2 05/23/22 <2,000 Remediation Well MW-R-2D2 06/06/22 2,480 Remediation Well MW-R-2D2 06/20/22 <2,000 Remediation Well MW-R-2D2 07/06/22 2,150 Remediation Well MW-R-2D2 07/18/22 2,230 Remediation Well MW-R-2D2 08/01/22 2,260 Remediation Well MW-R-2D2 08/15/22 <2,000 Remediation Well MW-R-2D2 08/23/22 <2,000 Remediation Well MW-R-2D2 08/29/22 2,110 Remediation Well MW-R-2D2 09/12/22 <2,000 Remediation Well MW-R-2D2 09/26/22 <2,000 Remediation Well MW-R-2D2 10/10/22 <2,000 Remediation Well MW-R-2D2 10/24/22 <2,000 Remediation Well MW-R-2D2 10/27/22 <2,000 Remediation Well MW-R-2D2 11/07/22 <2,000 Remediation Well MW-R-2D2 11/21/22 <2,000 Remediation Well MW-R-2D2 12/05/22 <2,000 Remediation Well MW-R-2D2 12/19/22 <2,000 Remediation Well MW-QC-103I 05/04/22 <2,000 Monitoring Well MW-QC-103I 10/27/22 <2,000 Monitoring Well MW-QC-104S 05/05/22 <2,000 Monitoring Well MW-QC-104S 10/27/22 59,200 Monitoring Well MW-QC-104S 11/02/22 4,810 Monitoring Well MW-QC-104S 11/03/22 5,030 Monitoring Well B-6

TABLE B-II.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED AND ANALYZED BY QUAD CITIES STATION PERSONNEL, 2022 RESULTS IN UNITS OF PCI/LITER COLLECTION SITE DATE ACTIVITY AQUIFER MW-QC-105I 05/04/22 <2,000 Monitoring Well MW-QC-105I 10/28/22 <2,000 Monitoring Well MW-QC-1 05/04/22 <2,000 Monitoring Well MW-QC-1 10/27/22 <2,000 Monitoring Well MW-QC-3 05/04/22 2,280 Monitoring Well MW-QC-3 10/27/22 <2,000 Monitoring Well MW-QC-117S 05/04/22 <2,000 Monitoring Well MW-QC-117S 10/28/22 <2,000 Monitoring Well B-7

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