Text

Annual Radiological Environmental Operating Report (PLA-8058)
	ML23116A102
Person / Time
Site:	Susquehanna
Issue date:	04/26/2023
From:	Casulli E; Susquehanna Steam Electric Co, Talen Energy
To:	; Office of Nuclear Reactor Regulation, Document Control Desk
References
	PLA-8058
	Download: ML23116A102 (1)
	v • d • e

Edward Casulli Site Vice President Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.3795 Fax 570.542.1504 Edward.Casulli@talenenergy.com TALEN~.

April 26, 2023 Attn: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT PLA-8058 ENERGY 10 CFR 50.4 Docket No. 50-387 50-388 In accordance with the Susquehanna Steam Electric Station (SSES) Units 1 and 2 Technical Specification 5.6.2, the SSES Annual Radiological Environmental Operating Report is hereby submitted for the 2022 calendar year.

There are no new or revised regulatory commitments contained in this submittal.

If you have any questions regarding this report, please contact Ms. Melisa Krick, Manager-Nuclear Regulatory Affairs, at (570) 542-1818.

E. Casulli

Attachment:

2022 Annual Radiological Environmental Operating Report Copy:

NRC Region I Mr. H. Anagnostopoulos, NRC Region I Mr. C. Highley, NRC Senior Resident Inspector Ms. A. Klett, NRC Project Manager Mr. M. Shields, PA DEP/BRP

Attachment to PLA-8058 2022 Annual Radiological Environmental Operating Report

SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 2022 Prepared by:

F. J. Hickey, S1(Health Physicist Reviewed by:

Kathleen M. Ervin, Sr. Environmental Scientist Approved by:

Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, Pennsylvania 18603

SUSQUEHANNA STEAM ELECTRIC STATION Units 1 & 2 2022 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY 1 TO DECEMBER 31, 2022 Susquehanna Nuclear, LLC Berwick, PA April, 2023

TABLE OF CONTENTS I. Summary.......................................................................................................................... 1 II. The Radiological Environmental Monitoring Program.............................................. 5 A. Objectives of the Operational REMP................................................................... 8 B. Implementation of the Objectives........................................................................ 9 III. Program Description.................................................................................................... 10 A. Data Interpretation............................................................................................. 10 B. Program Exceptions.......................................................................................... 12 C. Program Changes............................................................................................. 12 D. Quality Assurance Program.............................................................................. 23 E. Summary of Results - Inter-Laboratory Comparison Program......................... 23 IV. Results and Discussion............................................................................................... 27 A. Atmospheric....................................................................................................... 27

1. Air Particulates........................................................................................ 27

2. Air Iodine............................................................................................... 28 B. Direct Radiation................................................................................................. 29 C. Terrestrial.......................................................................................................... 31

1. Milk......................................................................................................... 31

2. Groundwater........................................................................................... 32

3. Drinking Water........................................................................................ 34

4. Food Products......................................................................................... 35 D. Aquatic.............................................................................................................. 36

1. Surface Water......................................................................................... 36

2. Fish......................................................................................................... 37

3. Shoreline Sediment................................................................................. 38 E. Land Use Census.............................................................................................. 40 V. Annotations to Previous AREOR.................................................................................. 41 VI. Conclusions................................................................................................................. 41 VII. References................................................................................................................. 42

-i-

TABLE OF CONTENTS (contd)

Appendix A - Program Summary.................................................................................... A-1 Appendix B - Sample Designation and Locations............................................................ B-1 Appendix C - Data Tables............................................................................................... C-1 Appendix D - Summary of Results from Analytics, Environmental Resource Associates (ERA) and Department of Energy (DOE) - Mixed Analyte Performance Evaluation Program (MAPEP)................................. D-1 Appendix E - REMP Sample Equipment Operability Trending................................. E-1

-ii-

LIST OF TABLES Exceptions Table................................................................................................................ 13 Appendix A Tables Table A Summary of Data for SSES........................................................................ A-2 Appendix B Tables Table B-1 Sampling Locations.................................................................................... B-3 Table B-2 Susquehanna Steam Electric Station Radiological Environmental Monitoring Program.................................................................................... B-8 Appendix C Tables Table C-1 Gross Beta Analyses of Air Particulate Filters Susquehanna Steam Electric Station......................................................................................... C-2 Table C-2 Gamma Spectroscopic Analyses of Composited Air Particulate Filters Susquehanna Steam Electric Station....................................................... C-4 Table C-3 Iodine-131 Analyses of Air Iodine Samples Susquehanna Steam Electric Station......................................................................................... C-5 Table C-4 Environmental Optically Stimulated Luminescence Dosimetry Results Susquehanna Steam Electric Station....................................................... C-7 Table C-5 Iodine-131 and Gamma Spectroscopic Analyses of Milk Susquehanna Steam Electric Station.............................................................................. C-10 Table C-6 Tritium and Gamma Spectroscopic Analyses of Groundwater Susquehanna Steam Electric Station....................................................... C-12

-iii-

LIST OF TABLES (contd)

Table C-7 Annual Average Tritium Concentration in Precipitation, Monitoring Wells and Lake Took-a-While (LTAW) Surface Water Data Susquehanna Steam Electric Station....................................................... C-14 Table C-8 Gross Beta, Tritium and Gamma Spectroscopic Analyses of Drinking Water Susquehanna Steam Electric Station............................................ C-15 Table C-9 Gamma Spectroscopic Analyses of Food Products (Fruits, Vegetables, and Broadleaf) Susquehanna Steam Electric Station.......... C-16 Table C-10 Tritium and Gamma Spectroscopic Analyses of Surface Water Susquehanna Steam Electric Station....................................................... C-17 Table C-11 Gamma Spectroscopic Analyses of Fish Susquehanna Steam Electric Station...................................................................................................... C-18 Table C-12 Gamma Spectroscopic Analyses of Shoreline Sediment Susquehanna Steam Electric Station.............................................................................. C-19 Appendix D Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services............................................ D-2 Table D-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services............................. D-4 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services............................................ D-5 Appendix E Table Table E-1 REMP Sample Equipment Operability Trending Susquehanna Steam Electric Station......................................................................................... E-2

-iv-

LIST OF MAPS Map B-1 Direct Radiation Monitoring Locations Within One Mile.............................. B-10 Map B-2 Direct Radiation Monitoring Locations From One to Five Miles.................. B-11 Map B-3 Direct Radiation Monitoring Locations Greater than Five Miles.................. B-12 Map B-4 Environmental Sampling Locations Within One Mile.................................. B-13 Map B-5 Environmental Sampling Locations From One to Five Miles...................... B-14 Map B-6 Environmental Sampling Locations Greater than Five Miles...................... B-15 LIST OF FIGURES Figure 1 Radiation Pathways..........................................................................................7 Figure 2 Sources of Radiation Exposure in the U.S.......................................................8 Figure C-1 Gross Beta Activity in Air Particulates......................................................... C-20 Figure C-2 Ambient Radiation Levels Based on Environmental Dosimetry Data............................................................................................................ C-21 Figure C-3 Iodine-131 Activity in Milk........................................................................... C-22 Figure C-4 Annual Average Tritium Activity in Precipitation and Surface Water Versus Ground Water...................................................................... C-23 Figure C-5 Gross Beta Activity in Drinking Water......................................................... C-24 Figure C-6 Tritium Activity in Surface Water................................................................. C-25

-v-

I.

Summary During normal operations of a nuclear power generating station there are permitted releases of small amounts of radioactive material to the environment. To monitor and determine the effects of these releases a Radiological Environmental Monitoring Program (REMP) has been established around the Susquehanna Steam Electric Station (SSES). The results of the REMP are published annually, providing a summary and interpretation of the data collected.

Applied Ecoscience, Inc. was responsible for the collection of environmental samples during 2022. Teledyne Brown Engineering (TBE) was responsible for the analysis of environmental samples during 2022. The results are discussed in this report. Landauer provided the dosimetry services for SSES during 2022.

This Annual Radiological Environmental Operating Report (AREOR) conducted for SSES covers the period January 1, 2022 through December 31, 2022. During that time period, 1304 analyses were performed on 1124 samples.

Historically, Tritium (H-3) has been the only man-made radionuclide detected in the environment by the Susquehanna Steam Electric Station (SSES)

Radiological Environmental Monitoring Program (REMP) that is attributable to station operations.

Based on data from the 2022 Radioactive Effluent Monitoring and Control program, approximately 40 Curies of H-3 were discharged in liquid radwaste releases to the Susquehanna River and approximately 68 Curies of H-3 were discharged from the station in airborne effluent releases. Sampling of the cooling tower blowdown line was discontinued in 2022 since the cooling tower blowdown line is a subsurface pipe and is not a true REMP surface water sample location. H-3 was not identified in any REMP surface water samples taken from the Susquehanna River during 2022. The 2022 average dilution factor for the Susquehanna River was 593, based on the annual average river flow of 6.52E+06 gpm and the annual average cooling tower blowdown flow of 1.10E+04 gpm.

H-3 was identified above analysis detection levels in precipitation samples taken on-site during 2022. Precipitation is analyzed to assess the impact of airborne effluent H-3 on groundwater activities.

H-3 was positively identified in one on-site groundwater sample (3rd quarter, monitoring well location 4S8) during 2022 at 370 pCi/liter. Assuming a Member of the Public was consuming the water from the referenced onsite monitoring well, the theoretical dose to the total body and maximum organ using the H-3 concentration of 370 pCi/liter and Regulatory Guide 1.109 methodology was determined to illustrate the effect. The calculated dose would be <0.01 mrem to the child total body and <0.01 mrem to the child liver (critical age group/organ) which is well below SSES Technical Requirements Manual (TRM) limits and applicable regulatory limits.

The REMP Sample Equipment Operability and year-to-year trend comparison is located in Appendix E, Table E-1.

The REMP was conducted in accordance with the SSES Technical Requirements Manual (TRM) and the Offsite Dose Calculation Manual (ODCM) which are based on the design objectives in 10CFR Part 50, Appendix I, Sections IV.B.2, IV.B.3 and IV.C. The Lower Limit of Detection (LLD) values required by the TRM and SSES ODCM were achieved for the 2022 reporting period. The REMP objectives were also met during this period. The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program and combined with historical results collected since commercial operation, it can be concluded that the levels and fluctuations were as expected and that the operation of the SSES had no significant radiological impact on the environment. Additionally, the REMP sample results for 2022 verify the adequacy of the SSES radioactive effluent control systems.

Samples of air particulates, air iodine, milk, groundwater, drinking water, vegetation, surface water, fish and sediment were collected and analyzed.

External radiation dose measurements were also made in the vicinity of SSES using passive dosimeters.

Air particulate samples were analyzed for concentrations of gross beta weekly and gamma emitting nuclides quarterly. Gross beta and cosmogenically produced beryllium-7 (Be-7) were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Air charcoal cartridge samples were analyzed for iodine-131 (I-131). All results were less than the minimum detectable concentration.

Environmental gamma radiation measurements were performed quarterly using optically stimulated luminescent dosimeters (OSLD). The levels of radiation detected were consistent with those observed in previous years.

Cow milk samples were analyzed for gamma emitting nuclides. High sensitivity I-131 analyses were performed on cow milk samples. All I-131 results were below the minimum detectable concentration. Naturally occurring potassium-40 (K-40) was detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Groundwater samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Drinking water samples were analyzed for concentrations of tritium, gross beta and gamma emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. No fission or activation products were detected.

Food product (fruits, vegetables and broadleaf vegetation) samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring Be-7 and K-40 were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Surface water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities detected were consistent with those detected in previous years. No fission or activation products were detected.

Fish and shoreline sediment samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring K-40 was detected at levels consistent with those detected in previous years. Naturally occurring radium-226 (Ra-226), actinium-228 (Ac-228), and thorium-228 (Th-228) were detected in shoreline sediment at levels consistent with results in previous years. No fission or activation products were detected in fish or sediment samples.

II.

The Radiological Environmental Monitoring Program The Susquehanna Steam Electric Station (SSES) is a nuclear electrical generating station located approximately 5 miles northeast of Berwick, in Luzerne County, Pennsylvania. The station consists of two boiling-water reactor generating units. The SSES is located on approximately a 1,087-acre tract just west of the Susquehanna River. The station was constructed in the 1970s, with Unit 1 beginning commercial operation on June 8, 1983, and Unit 2 beginning commercial operation on February 12, 1985. Units 1 and 2 each generate a net 1,350 megawatts (MWe), for a total station output of 2,700 MWe.

In the 4th quarter of 2021, Susquehanna Nuclear, LLC land ownership was reduced due to land transfers to other Talen Energy entities. Impacts to the SSES REMP resulting from the above referenced land ownership changes are being implemented as appropriate by SSES Chemistry personnel.

REMP changes resulting from the land transfers shall be documented in future Radiological Environmental Operating Reports.

In total Susquehanna Nuclear, LLC presently owns 1,152 acres of land.

Generally, this land is characterized by open deciduous woodlands interspersed with grasslands. The area around the site is primarily rural, consisting predominately of forest and agricultural lands.

Approximately 1,087 acres of land is jointly owned between Susquehanna Nuclear, LLC (90%) and Allegheny Electric Cooperative (10%). The land use includes generation and associated maintenance facilities, laydown areas, parking lots, roads, a nature preserve (the Susquehanna Riverlands), and agricultural leases to local farmers.

To the north of the station along the Susquehanna River, Susquehanna Nuclear, LLC owns 100% of the 65-acre Gould Island.

More specific information on the demography, hydrology, meteorology, and land use characteristics of the area in the vicinity of the SSES can be found in the Environmental Report [Reference 1], the Final Safety Analysis Report

[Reference 2] and the Final Environmental Statement [Reference 3] for the SSES.

The SSES has maintained a Radiological Environmental Monitoring Program (REMP) since April 1972, prior to construction of both units and ten years prior to the initial operation of Unit 1 in September 1982. The purpose of the preoperational REMP (April,1972 to September 1982) was to establish a baseline for radioactivity in the local environment that could be compared with the radioactivity levels observed in various environmental media throughout the operational lifetime of the SSES. This comparison facilitates assessments of the radiological impact of the SSES operation.

The REMP supplements the results of the radioactive effluent-monitoring program by verifying that the measurable concentrations of radioactive materials and levels of radiation in the environment are not higher than expected based on the effluent measurements and modeling of the environment in the vicinity of the SSES.

The pathways through which radiation or radioactive material may reach the public from nuclear power plants are direct exposure from the station, atmospheric, terrestrial, and aquatic pathways. (Figure 1 depicts these pathways)

Figure 1 - Radiation Pathways Depostlon to Grocnd Drinki,w Slrlace Waterer Groundw*ter People are exposed to radiation every day of their lives and have been since the dawn of mankind. Some of this radiation is naturally occurring while some is manmade. There are many factors that will determine the amount of radiation individuals will be exposed to such as where they live, medical treatments, etc. The average person in the United States is exposed to approximately 620 mrem each year. 310 mrem comes from natural sources and 310 from man-made sources. Figure 2 shows what the typical sources of radiation in the U.S.:

Figure 2 - Sources of Radiation Exposure in the U.S.

Sources of Radiation Exposure in the U.S.

Cosmic (Space) - 5%

Terrestrial (Soil) - 3%

Internal - 5%

CJ Natural Sources - 50%

~310 millirem (0.31 rem)

Sources NCRP Report No, 160(2009)

Industrial an'd Occupational

<0.1%

Consumer - 2%

Nuclear Medicine 12%

Manmade Sources - 50%

-310 millirem (0.31 rem)

Full report Is awilable on the NCRP website atv1111V1,NCRPonline,orc Radioanalytical data from samples collected under the REMP were compared with results from the preoperational phase and historical results during operations. Differences between these periods were examined statistically to determine the effects of station operations. This report presents the results from January 1 through December 31, 2022, for the SSES Radiological Environmental Monitoring Program (REMP).

A.

Objectives of the Operational REMP The objectives of the Operational REMP are to:

1.

Document compliance with SSES REMP Technical Requirements and radiological environmental surveillances.

2.

Verify proper implementation of SSES radiological effluent controls.

3.

Identify, measure and evaluate trends of radionuclide concentrations in environmental pathways near SSES.

4.

Assess impact of SSES Effluents on the Environment and the public.

5.

Verify that SSES operations have no detrimental effects on the health and safety of the public or on the environment.

B.

Implementation of the Objectives

1.

In order to meet the objectives, an operational REMP was developed. Samples of various media were selected for monitoring due to the radiological dose impact to humans and other organisms. The selection of samples was based on:

(a)

Established critical pathways for the transfer of radionuclides through the environment to man, and (b)

Experience gained during the preoperational phase.

Sampling locations were determined based on local meteorology, Susquehanna River hydrology, local demography, and land uses.

2.

Sampling locations were divided into two classes, indicator and control. Indicator locations were sited where it is expected that radiation and radioactive material that might originate from the station would be detectable. Control locations were selected in areas where they would be unaffected by station operations (i.e. Susquehanna River upstream from the station, >10 miles from the station in least prevalent wind directions). Fluctuations in the levels of radionuclides and direct radiation at indicator locations were evaluated with respect to analogous fluctuations at control locations. Indicator and control location data were also evaluated relative to preoperational data.

3.

Appendix A, Program Summary, describes and summarizes the analytical results in accordance with the SSES Technical Specifications.

4.

Appendix B, Sample Designation and Locations, describes the coding system which identifies sample type and location. Table B-1 lists the location codes, locations, latitude, longitude, and the types of samples collected at each location. Table B-2 contains sample medium, analysis and sampling details.

5.

The sampling locations are indicated on the following maps:

Map B-1, Direct Radiation Monitoring Locations Within One Mile Map B-2, Direct Radiation Monitoring Locations From One to Five Miles Map B-3, Direct Radiation Monitoring Locations Greater Than Five Miles Map B-4, Environmental Sampling Locations Within One Mile Map B-5, Environmental Sampling Locations From One to Five Miles Map B-6, Environmental Sampling Locations Greater Than Five Miles II.

Program Description A.

Data Interpretation Results of analyses are grouped according to sample type and presented in Appendix C, Data Tables. All results above the Lower Limit of Detection (LLD) are at a confidence level of +/- 2 sigma. This represents the range of values into which 95% of repeated analyses of the same sample should fall. As defined in U.S. Nuclear Regulatory Commission Regulatory Guide 4.8, LLD is the smallest concentration of radioactive material in a sample that will yield a net count (above system background) that will be detected with 95% probability, with only 5% probability of falsely concluding that a blank observation represents a "real signal." LLD is normally calculated as 4.66 times the standard deviation of the background counting rate, or of the blank sample count, as appropriate, divided by counting efficiency, sample size, 2.22 (dpm per picocurie), the radiochemical yield when applicable, the radioactive decay constant and the elapsed time between sample collection and time of counting. LLD represents the capability of the measurement system.

The Minimum Detectable Concentration (MDC) is defined as the smallest concentration of radioactive material that can be detected at a given confidence level. The MDC differs from the LLD in that the MDC takes into consideration the interference caused by the presence of other nuclides while the LLD does not. MDC is an indicator of the performance of the measurement system. The MDC is set to be below the LLD.

Summaries of the radionuclide average picocurie activities and ranges are included in Table A. If a radionuclide was not detected, zero was used for that isotope in dose calculations and the activity is listed as

<MDC (less than the minimum detectable concentration) in Table A.

<MDC indicates that no activity was positively detected in any sample when samples were analyzed with techniques which achieved the required Lower Limits of Detection (LLD). The following are typical measurement laboratory MDCs for airborne and waterborne REMP samples.

Airborne REMP Typical MDCs Radionuclide MDC (pCi/cu.m.)

Mn-54 1.2 E-03 Fe-59 6.9 E-03 Co-58 1.8 E-03 Co-60 1.2 E-03 Zn-65 2.9 E-03 Cs-134 1.1 E-03 Cs-137 1.0 E-03 I-131 2.0 E-01 Waterborne REMP Typical MDCs Radionuclide MDC (pCi/L.)

H-3 (DIST) 2.5 E+02 Mn-54 3.8 E+00 Fe-59 1.1 E+01 Co-58 3.9 E+00 Co-60 4.1 E+00 Zn-65 7.8 E+00 Cs-134 3.7 E+00 Cs-137 4.0 E+00 I-131 9.4 E+00 H-3 2.5 E+02 Gross Beta 1.9 E+00 The grouped data were averaged and standard deviations calculated.

Thus, the +/- 2 sigma of the averaged data represent sample and not analytical variability. For reporting and calculation of averages, any result occurring at or below the LLD is considered to be at the LLD level.

B.

Program Exceptions See Exceptions Table 2022 REMP Atypical Sampling Occurrences C.

Program Changes Surface water station 2S7 was removed from the sampling program in 2022.

2022 REMP Atypical Sampling Occurrences Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action JAN Air 10S3 01/05/22 to 01/12/22 Power outage-date and time unknown.

Loss of 1.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-02 CR 2022-00893 01/12/22: No action required. Air monitor resumed normal operation when power was restored.

01/12/22: Operability verified @ 0957 hours0.0111 days 0.266 hours 0.00158 weeks 3.641385e-4 months .

Ideal sample collected for sample period:

23,500 cf.

Air 10S3 01/12/22 to 01/19/22 Power outage-date and time unknown.

Loss of 0.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-03 CR 2022-01248 01/19/22: No action required. Air monitor resumed normal operation when power was restored.

01/19/22: Operability verified @ 1005 hours0.0116 days 0.279 hours 0.00166 weeks 3.824025e-4 months .

Ideal sample collected for sample period:

23,300 cf.

FEB Air 12S1 02/01/22 to 02/09/22 (momentary loss of 12kV power)

Momentary loss of power on 02/04/22 (time unknown). No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-04 CR 2022-02124 02/04/22: No action required. Air monitor resumed normal operation when power was restored.

02/04/21: Operability verified @ 0845 hours0.00978 days 0.235 hours 0.0014 weeks 3.215225e-4 months .

Ideal sample collected for sample period:

25,900 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action FEB (cont.)

Air 12S1 02/09/22 to 02/16/22 (momentary loss of 12kV power & timer box malfunction)

Momentary loss of power on 02/13/22 @ 0520 hours0.00602 days 0.144 hours 8.597884e-4 weeks 1.9786e-4 months .

Timer box #8 found running in reverse upon arrival.

Non-continuous sampler operation.

CA #22-05 CR 2022-02569 02/13/22: No action required. Air monitor resumed normal operation when power was restored. Timer box #8 replaced with timer box

7.

02/13/21: Operability verified @ 1009 hours0.0117 days 0.28 hours 0.00167 weeks 3.839245e-4 months .

Ideal sample collected for sample period:

22,800 cf.

Air 12S1 02/16/22 to 02/23/22 (loss of 12kV power)

Power outage on 02/18/22 @ 0509 hours0.00589 days 0.141 hours 8.416005e-4 weeks 1.936745e-4 months .

Loss of 12.0 hours0 days 0 hours 0 weeks 0 months , as determined by timer box.

Non-continuous sampler operation.

CA #22-06 CR 2022-02893 02/18/22: No action required. Air monitor resumed normal operation when power was restored.

02/19/22: Operability verified @ 1213 hours0.014 days 0.337 hours 0.00201 weeks 4.615465e-4 months .

Ideal sample collected for sample period:

21,200 cf.

MAR Air 12S1 03/02/22 to 03/09/22 (loss of 12kV power)

Power outage on 03/04/22 (time unknown) for maintenance.

Loss of 10.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , as determined by timer box.

Non-continuous sampler operation.

CA #22-07 CR 2022-03645 03/04/22: No action required. Air monitor resumed normal operation when power was restored.

03/07/22: Operability verified @ 1319 hours0.0153 days 0.366 hours 0.00218 weeks 5.018795e-4 months .

Ideal sample collected for sample period:

21,500 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action MAR (cont.)

Air 12S1 03/02/22 to 03/09/22 (momentary loss of 12kV power)

Momentary loss of power on 03/08/22 @ 0200 hours0.00231 days 0.0556 hours 3.306878e-4 weeks 7.61e-5 months . No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-08 CR 2022-03807 03/08/22: No action required. Air monitor resumed normal operation when power was restored.

03/08/22: Operability verified @ 1428 hours0.0165 days 0.397 hours 0.00236 weeks 5.43354e-4 months .

Ideal sample collected for sample period:

21,500 cf.

Air

3S2, 13S6 03/02/22 to 03/09/22 Pumps providing inadequate flow rate upon arrival

(<2.0 cfm), below the procedural range of 2.0-2.4 cfm. Adequate flow could not be achieved with maximum flow settings.

Continuous sampling during sample period.

CA #22-09 CR 2022-03895 03/09/22: Pumps were replaced, and air flow restored to within procedural range.

03/09/22: Operability verified @ 1010 hours0.0117 days 0.281 hours 0.00167 weeks 3.84305e-4 months for 3S2, and 1230 hours0.0142 days 0.342 hours 0.00203 weeks 4.68015e-4 months for 13S6.

Ideal samples collected for sample period:

18,600 cf (3S2), 16,300 cf (13S6).

MAY Surface Water 6S6 04/26/22 to 05/02/22 (week 1 May composite)

While I&C was performing monthly preventative maintenance, the PLC failed to resume the normal program.

Week 1 composite sample with known stop and start time was used in May composite.

CA #22-10 CR 2022-07727 04/30/22: Week 1 sample stopped @ 1249 hours0.0145 days 0.347 hours 0.00207 weeks 4.752445e-4 months .

05/01/22: I&C restored sampler to service @

1327 hours0.0154 days 0.369 hours 0.00219 weeks 5.049235e-4 months .

05/02/22: Operability verified @ 1057 hours0.0122 days 0.294 hours 0.00175 weeks 4.021885e-4 months .

Ideal sample collected for week 1 sample period.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action MAY (cont.)

Air 12S1 05/18/22 to 05/25/22 (momentary loss of 12kV power)

Momentary loss of power on 05/21/22 (time unknown). No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-11 CR 2022-08808 05/21/22: No action required. Air monitor resumed normal operation when power was restored.

05/21/22: Operability verified @ 1910 hours0.0221 days 0.531 hours 0.00316 weeks 7.26755e-4 months .

Ideal sample collected for sample period:

21,900 cf.

Air 13S6 05/18/22 to 05/25/22 Timer box malfunction. Timer box recorded only 77.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months for the week.

No effect on monitoring.

Continuous sampler operation.

CA #22-12 CR 2022-08999 05/25/22: Timer box #2 replaced with timer box

3. Equipment restored to service @ 0937 hours0.0108 days 0.26 hours 0.00155 weeks 3.565285e-4 months .

05/25/22: Operability verified @ 0939 hours0.0109 days 0.261 hours 0.00155 weeks 3.572895e-4 months .

Ideal sample collected for sample period:

21,800 cf.

JUL Air 12S1 07/12/22 to 07/20/22 (momentary loss of 12kV power)

Momentary loss of power on 07/12/22 (time unknown). No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-13 CR 2022-11024 07/12/22: No action required. Air monitor resumed normal operation when power was restored.

07/13/22: Operability verified @ 1325 hours0.0153 days 0.368 hours 0.00219 weeks 5.041625e-4 months .

Ideal sample collected for sample period:

24,100 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action JUL (cont.)

Air 12S1 07/27/22 to 08/02/22 (momentary loss of 12kV power)

Momentary loss of power on 07/31/22 @ 0858 hours0.00993 days 0.238 hours 0.00142 weeks 3.26469e-4 months . No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-14 CR 2022-11712 07/31/22: No action required. Air monitor resumed normal operation when power was restored.

07/31/22: Operability verified @ 1533 hours0.0177 days 0.426 hours 0.00253 weeks 5.833065e-4 months .

Ideal sample collected for sample period:

18,100 cf.

AUG Air 13S6 08/02/22 to 08/09/22 Power outage-date and time unknown.

Loss of 2.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-15 CR 2022-12142 08/09/22: No action required. Air monitor resumed normal operation when power was restored.

08/09/22: Operability verified @ 1001 hours0.0116 days 0.278 hours 0.00166 weeks 3.808805e-4 months .

Ideal sample collected for sample period:

20,700 cf.

SEP Air 12S1 09/21/22 to 09/28/22 (momentary loss of 12kV power)

Momentary loss of power on 09/22/22 (time unknown). No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-16 CR 2022-14152 09/22/22: No action required. Air monitor resumed normal operation when power was restored.

09/22/22: Operability verified @ 0935 hours0.0108 days 0.26 hours 0.00155 weeks 3.557675e-4 months .

Ideal sample collected for sample period:

21,300 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action SEP (cont.)

Air 3S2 09/21/22 to 09/28/22, 09/28/22 to 10/05/22, &

10/05/22 to 10/12/22 No power to sampler upon arrival on 09/28/22.

Outage began on 09/22/22 @ 0900 hours0.0104 days 0.25 hours 0.00149 weeks 3.4245e-4 months , as determined by timer box during weekly collection.

Power issue between breaker box and sampling unit.

Non-continuous sampler operation.

CA #22-17 CR 2022-14415 09/28/22: CR generated to investigate and repair issue in power supply.

10/08/22: Sampler returned to service following repair @ 1525 hours0.0177 days 0.424 hours 0.00252 weeks 5.802625e-4 months .

10/09/22: Operability verified @ 1048 hours0.0121 days 0.291 hours 0.00173 weeks 3.98764e-4 months .

Less than ideal sample collected for sample period 09/21/22 to 09/28/22: 3,100 cf.

No sample for sample period 09/28/22 to 10/05/22.

Less than ideal sample collected for sample period 10/05/22 to 10/12/22: 12,300 cf.

Air 10S3 09/21/22 to 09/28/22 Power outage-date and time unknown.

Loss of 0.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-18 CR 2022-14425 09/28/22: No action required. Air monitor resumed normal operation when power was restored.

09/28/22: Operability verified @ 1022 hours0.0118 days 0.284 hours 0.00169 weeks 3.88871e-4 months .

Ideal sample collected for sample period:

22,200 cf.

Air 12S1 09/28/22 to 10/05/22 (momentary loss of 12kV power)

Momentary loss of power on 09/28/22 @ 2352 hours0.0272 days 0.653 hours 0.00389 weeks 8.94936e-4 months . No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-19 CR 2022-14461 09/28/22: No action required. Air monitor resumed normal operation when power was restored.

09/29/22: Operability verified @ 1417 hours0.0164 days 0.394 hours 0.00234 weeks 5.391685e-4 months .

Ideal sample collected for sample period:

21,500 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action OCT Air

13S6, 9B1 09/28/22 to 10/05/22 Power outages-dates and times unknown.

Loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months at 13S6, and 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months at 9B1, as determined by timer boxes during weekly collection.

Non-continuous sampler operation.

CA #22-20 CR 2022-14934 10/05/22: No action required. Air monitors resumed normal operation when power was restored.

10/05/22: Operability verified @ 0948 hours0.011 days 0.263 hours 0.00157 weeks 3.60714e-4 months for 13S6, and 1019 hours0.0118 days 0.283 hours 0.00168 weeks 3.877295e-4 months for 9B1.

Ideal samples collected for sample period:

23,300 cf (13S6), and 21,400 cf (9B1).

Surface Water 6S6 10/10/22 to 10/25/22 (week 3 & 4 October composite)

ACS indicated error after attempted second manual sample during weekly collection on 10/10/22. Screen turned red and sensor would not indicate water was being drawn.

Weeks 3 & 4 composite sample were used in October composite.

CA #22-21 CR 2022-15149 10/10/22: Requested maintenance ASAP to avoid overflow condition.

10/19/22: I&C restored sampler to service @

1013 hours0.0117 days 0.281 hours 0.00167 weeks 3.854465e-4 months .

10/21/22: Operability verified @ 0624 hours0.00722 days 0.173 hours 0.00103 weeks 2.37432e-4 months .

Ideal samples collected for weeks 3 & 4 sample period.

Air 12S1 10/12/22 to 10/18/22 Power outage-date and time unknown.

Loss of 1.0 hours0 days 0 hours 0 weeks 0 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-22 CR 2022-15503 10/18/22: No action required. Air monitor resumed normal operation when power was restored.

10/18/22: Operability verified @ 0950 hours0.011 days 0.264 hours 0.00157 weeks 3.61475e-4 months .

Ideal sample collected for sample period:

18,400 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action OCT (cont.)

Air 12S1 10/18/22 to 10/26/22 (momentary loss of 12kV power)

Momentary loss of power on 10/18/22 (time unknown). No loss of sampling time as determined by timer box.

Non-continuous sampler operation.

CA #22-23 CR 2022-15502 10/18/22: No action required. Air monitor resumed normal operation when power was restored.

10/18/22: Operability verified @ 1426 hours0.0165 days 0.396 hours 0.00236 weeks 5.42593e-4 months .

Ideal sample collected for sample period:

24,600 cf.

Air 10S3 10/18/22 to 10/26/22 Power outage-date and time unknown.

Loss of 12.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-24 CR 2022-15893 10/26/22: No action required. Air monitor resumed normal operation when power was restored.

10/26/22: Operability verified @ 1001 hours0.0116 days 0.278 hours 0.00166 weeks 3.808805e-4 months .

Ideal sample collected for sample period:

24,100 cf.

NOV Air 10S3 10/26/22 to 11/02/22 Timer box malfunction. Timer box recorded only 131.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months for the week.

No effect on monitoring.

Continuous sampler operation.

CA #22-25 CR 2022-16295 11/02/22: Timer box #4 replaced with timer box

12. Equipment restored to service @ 1005 hours0.0116 days 0.279 hours 0.00166 weeks 3.824025e-4 months .

11/02/22: Operability verified @ 1006 hours0.0116 days 0.279 hours 0.00166 weeks 3.82783e-4 months .

Ideal sample collected for sample period:

22,700 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action NOV (cont.)

Air 10S3 11/15/22 to 11/22/22 Power outage-date and time unknown.

Loss of 8.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , as determined by timer box during weekly collection.

Non-continuous sampler operation.

CA #22-26 CR 2022-17129 11/22/22: No action required. Air monitor resumed normal operation when power was restored.

11/22/22: Operability verified @ 1022 hours0.0118 days 0.284 hours 0.00169 weeks 3.88871e-4 months .

Ideal sample collected for sample period:

22,500 cf.

Surface Water 6S6 11/29/22 to 12/06/22 (week 1 December composite)

ACS unable to pull water for manual sample during weekly collection on 11/29/22. Screen turned red and no verification aliquots could be obtained for week 5 November.

No effect on week 5 November composite. Week 1 composite sample was used in December composite.

CA #22-27 CR 2022-17291 11/29/22: Requested maintenance ASAP to maintain constant monitoring.

11/30/22: I&C restored sampler to service @

1250 hours0.0145 days 0.347 hours 0.00207 weeks 4.75625e-4 months .

11/30/22: Operability verified @ 1313 hours0.0152 days 0.365 hours 0.00217 weeks 4.995965e-4 months .

Ideal sample collected for week 1 sample period.

Air 12S1 11/22/22 to 11/30/22 Timer box malfunction. Timer box recorded only 136.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months for the week.

No effect on monitoring.

Continuous sampler operation.

CA #22-28 CR 2022-17349 11/30/22: Timer box #7 replaced with timer box

13. Equipment restored to service @ 1007 hours0.0117 days 0.28 hours 0.00167 weeks 3.831635e-4 months .

11/30/22: Operability verified @ 1008 hours0.0117 days 0.28 hours 0.00167 weeks 3.83544e-4 months .

Ideal sample collected for sample period:

24,700 cf.

2022 REMP Atypical Sampling Occurrences (continued)

Date Sample Type Location Code(s)

Sample Period Reason for Occurrence(s)

Corrective Action DEC Air 8G1 12/21/22 to 12/28/22 Lower than anticipated sampling volume for sample period. Sample volume was 16,200 cf compared to other stations with 20,000 cf. No power outage indicated by timer box. No signs of malfunction.

Continuous sampler operation.

CA #22-29 CR 2022-18452 12/28/22: Sampler checked during next sampling period.

01/04/23: Sampler maintained proper function during sampling period 12/28/22 to 01/04/23.

Operability verified @ 1100 hours0.0127 days 0.306 hours 0.00182 weeks 4.1855e-4 months .

Ideal sample collected for sample period:

16,200 cf.

Air 10S3 12/21/22 to 12/28/22 Incorrect charcoal cartridge placement at air monitor for sampling period. Cartridge appears to have been loaded upside down, according to arrows on label.

Continuous sampler operation.

CA #22-30 CR 2022-18467 12/28/22: CR generated. Peer check to be performed prior to weekly deployment for cartridge placement and will be incorporated into procedures.

12/28/22: Cartridge placement verification and operability verified @ 1016 hours0.0118 days 0.282 hours 0.00168 weeks 3.86588e-4 months .

Ideal sample collected for sample period:

21,500 cf.

D.

Quality Assurance Program Teledyne Brown Engineering The quality of the results obtained by TBE is ensured by the implementation of the Quality Assurance Program as described in the Teledyne Brown Engineering Quality Assurance Manual and the Teledyne Brown Engineering Procedure Manual.

E.

Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices 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:

1. 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.

2. 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 USEPA, 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.

3. 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.

Teledyne Brown Engineering For the TBE laboratory, 142 out of 150 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program. NOTE: One analysis (soil for Tc-99) 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.

IV.

Results and Discussion The analytical results of the 2022 REMP samples are divided into categories based on exposure pathways: atmospheric, direct radiation, terrestrial, and aquatic. The analytical results for the 2022 REMP are summarized in Appendix A, Program Summary. The data for individual samples are presented in Appendix C, Data Tables. The data are compared to the formal preoperational environmental monitoring program data (April 1972 to September 1982) and to data during operations. The data collected demonstrates that the SSES REMP was conducted in compliance with the TRM and the SSES ODCM.

A.

Atmospheric Atmospheric REMP sampling included the collection of air particulates, air iodine and direct radiation samples.

1.

Air Particulates Air particulate samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1 and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for gross beta. Quarterly composites of the weekly samples from each location were analyzed for specific gamma emitters.

Gross Beta Gross beta activity was detected in 311 of 311 of the indicator location samples at concentrations ranging from 6 to 49 E-3 pCi/m3 with an average concentration of 15 E-3 pCi/m3, and in 52 of 52 of the control location samples at concentrations ranging from 6 to 27 E-3 pCi/m3 with an average of 15 E-3 pCi/m3. The maximum preoperational level detected was 102 E-3 pCi/m3 with an average concentration of 62 E-3 pCi/m3.

(Table C-1, Appendix C); Historical levels of gross beta are shown in Figure C-1. Results for gross beta analysis from 1974 to current year are plotted.

Gamma Spectrometry Gamma spectrometry was performed on each of the 28 quarterly composite samples. Beryllium-7, attributed to cosmic ray activity in the atmosphere, was detected in all 24 indicator location composites at concentrations ranging from 63 E-3 to 137 E-3 pCi/m3 with an average concentration of 105 E-3 pCi/m3, and in the four control location composites ranging in concentration from 69 to 129 E-3 pCi/m3 with an average concentration of 104 E-3 pCi/m3.

The maximum preoperational level detected was 85 E-3 pCi/m3 with an average concentration of 74 E-3 pCi/m3. (Table C-2, Appendix C)

All other gamma emitters were less than the LLD.

2.

Air Iodine Filtered air iodine samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1, and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for I-131.

Iodine-131 Iodine-131 was not detected in any indicator location samples or control location samples. Preoperational data is not available for comparison. (Table C-3, Appendix C)

B.

Direct Radiation Ambient radiation levels in the environs were measured at each monitoring location with a pair of optically stimulated luminescent dosimeters (OSLD) composed of aluminum oxide crystals supplied and processed by Landauer. The Landauer OSLD is designed to meet the ANSI N545 Standard and ANSI/HPS Standard N13.37-2014.

Packets containing OSLDs for quarterly exposure were placed in the owner-controlled area and around the site at various distances and in each land-based meteorological sector. Emphasis was placed on special interest areas such as population centers, nearby residences, and schools.

A total of 57 locations were monitored for direct radiation during 2022, including 32 site boundary locations, 14 outer distant locations, six special interest locations and five control locations.

Environmental monitoring of ambient radiation levels began prior to the commencement of SSES operation. The preoperational monitoring period data used in the calculation of dose attributable the SSES operation is from 1980-1981. The availability of preoperational direct radiation monitoring data and data for control direct radiation monitoring locations provides a basis for distinguishing between the portions of dose received from exposure to sources of natural radiation and that which might have been from man-made sources of radiation.

Pre-operational and operational data are compared for the purpose of determining if dosimeter data may indicate a dose contribution from SSES operation. Ratios of doses for specific indicator locations to the average of the doses for control locations from operational periods are compared to their counterparts from the preoperational period.

Comparison of these ratios is performed in lieu of comparing the actual operational and preoperational doses. All indicator-to-control-average dose ratios for operational periods are compared to expected ranges from 1980-81 data for indicator-to-control-average dose ratios from the same locations. If preoperational data does not exist for the location of interest, indicator-to-control-average dose ratios for operational periods are compared to data for control locations monitored during 1980-81. The purpose for these comparisons is to flag possible SSES direct radiation dose contributions and to provide input, if appropriate, for the calculation of SSES direct radiation dose contributions.

Additional details on the statistical method used for determination of direct radiation dose to a member of the public due to SSES operation (based on environmental dosimeter data) can be found in Engineering Calculation EC-ENVR-1012, Interpretation of Environmental Direct Radiation Monitoring Results - Estimation of Direct Radiation Dose to Members of the Public Attributable to SSES Fuel Cycle Operations Rev. 2.

The indicator locations annual average dose rate was 16.3 milliroentgen per standard quarter. The annual average dose rate for the control locations was 14.5 milliroentgen per standard quarter. The preoperational average for the quarterly direct radiation readings was 17.6 milliroentgen per standard quarter.

In 2022, the maximum direct radiation dose to a member of the public calculated using the methodology in EC-ENVR-1012 was 0.796 mrem.

The results of the direct radiation measurements for 2022 confirmed that the radiation levels in the vicinity of the SSES were similar to previous years. (Table C-4, Appendix C); Figure C Ambient Radiation Levels Based on Environmental Dosimetry Data from 1973 to current year are plotted as quarterly averages.

C.

Terrestrial Terrestrial REMP sampling included the collection of milk, groundwater, drinking water, and vegetation.

1.

Milk Milk samples were collected biweekly when cows were on pasture and monthly when cows were not grazing on pasture.

Animals are considered on pasture from April to October of each year. Samples were collected in new polyethylene containers and transported in ice chests with preservatives added to the milk.

Milk samples were collected at local dairy farms from 2 indicator locations (5E2 and 13E3) and one control location (10G1). Each sample was analyzed for I-131 and gamma emitters.

Iodine-131 Iodine-131 was not detected above minimum detectable concentration in any of the 60 samples analyzed.

Preoperational data is not available for comparison. (Table C-5, Appendix C); Figure C Iodine-131 Activity in Milk results from 1976 to 2022 are plotted.

Gamma Spectrometry Naturally occurring K-40 was detected in all 60 samples with concentrations for the 40 indicator location samples ranging from 1,026 to 1,432 pCi/L with an average concentration of 1,224 pCi/L, and the 20 control location sample concentrations ranging from 1129 to 1,430 pCi/L with an average concentration of 1,312 pCi/L. The maximum preoperational level detected was 1,500 pCi/L with an average concentration of 1,358 pCi/L. (Table C-5, Appendix C).

All other gamma emitters were less than the LLD.

2. Groundwater An expanded groundwater monitoring network was initiated in 2006 for the SSES as part of a site-wide hydrogeological investigation in accordance with the Nuclear Energy Institute (NEI) Groundwater Protection Initiative (GPI). The additional groundwater monitoring wells are sampled as part of the Radiological Environmental Monitoring Program (REMP) to regularly assess groundwater quality and provide early detection of any inadvertent leaks or spills of radioactive materials that could reach groundwater. Groundwater is sampled quarterly and analyzed for H-3 and gamma activity.

Additionally, precipitation sampling was initiated in 2007 and analyzed for H-3 activity to assess the influence of station airborne H-3 emissions on groundwater H-3 activities.

Precipitation washout monitoring data is not used in dose calculations; however, the data does give a gross indication of H-3 which makes its way into surface water and soil where it eventually seeps into shallow groundwater. The annual average H-3 concentrations in precipitation, groundwater monitoring wells and surface water are summarized in Table C-7 and graphically depicted in Figure C Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater.

Groundwater samples were collected quarterly at 10 indicator locations (1S3, 1S4, 4S8, 4S9, 8S4, 7S10, 2S8, 6S11A, 6S12 and 7S11) and one control station (13S7). Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected above the minimum detectable concentration in 1 of the 40 indicator location samples with an concentration of 370 pCi/L. None of the four control location samples had tritium activity above the minimum detectable concentration. The maximum preoperational level detected was 119 pCi/L. (Table C-6, Appendix C); Figure C Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater results from 2007 to 2022 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator or control samples. Preoperational data is not available for comparison. (Table C-6, Appendix C)

All other gamma emitters were less than the LLD.

3.

Drinking Water Drinking water samples were collected monthly from one location (12H2). Each sample was analyzed for gross beta, H-3 and gamma emitters.

Gross Beta Gross beta activity was detected in seven of the 12 drinking water samples. Sample concentrations ranged from 2.2 to 3.2 pCi/L with an average concentration of 2.9 pCi/L. The maximum preoperational level detected was 2.8 pCi/L with an average concentration of 1.8 pCi/L. (Table C-8, Appendix C);

Figure C Gross Beta Activity in Drinking Water results from 1977 to 2022 are plotted.

Tritium Tritium activity was not detected in any of the samples. The maximum preoperational level detected was 194 pCi/L with an average of 132 pCi/L. (Table C-8, Appendix C)

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the samples. Preoperational data is not available for comparison.

(Table C-8, Appendix C)

All other gamma emitters were less than the LLD.

4. Food Products Food products from two indicator locations (11D1 and 11S6) were collected throughout the growing season. All samples (fruit, vegetable, and broadleaf) were analyzed for gamma emitters and included soybeans, corn, swiss chard and collards.

Gamma Spectrometry Naturally occurring Be-7, attributed to cosmic ray activity in the atmosphere, was detected in eight of the 12 indicator location samples with concentrations ranging from 311 to 983 pCi/kg wet with an average concentration of 665 pCi/kg wet.

Preoperational data is not available for comparison.

Naturally occurring K-40 was detected in all 12 indicator location samples with concentrations ranging from 2,598 to 14,660 pCi/kg wet with an average concentration of 4,389 pCi/kg wet. The maximum preoperational level detected was 4,800 pCi/kg wet with an average concentration of 2,140 pCi/kg wet.

Naturally occurring Ac-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison.

Naturally occurring Th-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison. (Table C-9, Appendix C)

All other gamma emitters were less than the LLD.

D.

Aquatic Aquatic samples include surface water, fish, and sediment samples.

1.

Surface Water Surface water samples were collected routinely at one indicator location (6S5) and one control location (6S6). Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected in none of the 12 indicator location samples. Tritium was not detected in any of the 12 control location samples. The maximum preoperational level detected was 319 pCi/L, with an average concentration of 140 pCi/L.

(Table C-10, Appendix C) Figure C Tritium Activity in Surface Water, results from 1972 to 2022 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator location or control location samples. Preoperational data is not available for comparison. Iodine-131 was not detected in any of the indicator or control samples. The maximum preoperational level detected was 0.43 pCi/L, with an average concentration of 0.33 pCi/L. (Table C-10, Appendix C)

All other gamma emitters were less than the LLD.

2.

Fish Edible species of fish were collected in the spring and fall of 2022 at two indicator locations (IND [Susquehanna River] and LTAW (only collected in the fall)) and one control location (2H

[Susquehanna River]). Each sample was analyzed for gamma emitters.

Gamma Spectrometry Naturally occurring K-40 was detected in all indicator location samples at concentrations ranging from 2,342 to 4,929 pCi/kg wet with an average concentration of 3,525 pCi/kg wet, and in all control location samples at concentrations ranging from 2,788 to 4,030 pCi/kg wet with an average concentration of 3,475 pCi/kg wet. The maximum preoperational level detected was 3,600 pCi/kg dry with an average concentration of 3,871 pCi/kg dry. (Table C-11, Appendix C)

All other gamma emitters were less than the LLD.

3.

Shoreline Sediment Sediment samples were collected from the Susquehanna River in the spring and fall at two indicator locations (7B and 12F) and one control location (2B). Each sample was analyzed for gamma emitters.

Gamma Spectroscopy Naturally occurring K-40 was detected in all four of the indicator location samples at concentrations ranging from 8,246 to 15,330 pCi/kg dry with an average concentration of 11,210 pCi/kg dry, and in all of the control location samples with concentrations ranging from 10,160 to 11,500 pCi/kg dry with an average concentration of 10,830 pCi/kg dry. The maximum preoperational level detected was 11,000 pCi/kg dry with an average concentration of 8,500 pCi/kg dry.

Cesium-137 was not detected in any of the indicator or control location samples. The maximum preoperational level detected was 210 pCi/kg dry with an average concentration of 110 pCi/kg dry.

Naturally occurring Ra-226 was detected in one of the indicator location samples with a concentration of 3,465 pCi/kg dry and none of the control location samples. The maximum preoperational level detected was 1,900 pCi/kg dry with an average concentration of 700 pCi/kg dry.

Naturally occurring Ac-228 was detected in all four indicator location samples at concentrations ranging from 716 to 1,567 pCi/kg dry with an average concentration of 10,540 pCi/kg dry, and in both of the control location samples at concentrations ranging from 800 to 1,043 pCi/kg dry with an average concentration of 921 pCi/kg dry. Preoperational data is not available for comparison.

Naturally occurring Th-228 was detected in all of the four indicator location samples at concentrations ranging from 671 to 1,014 pCi/kg dry with an average concentration of 846 pCi/kg dry, and in both of the control location samples at concentrations ranging from 614 and 1,157 pCi/kg dry with an average concentration of 886 pCi/kg dry. The maximum preoperational level detected was 3,200 pCi/kg dry with an average concentration of 1,300 pCi/kg dry. (Table C 12, Appendix C)

All other gamma emitters were less than the LLD.

E.

Land Use Census SYNOPSIS OF 2022 LAND USE CENSUS Applied Ecoscience, Inc. conducted a Land Use Census during the 2022 growing season around SSES to comply with the ODCM. The purpose of the survey was to document the nearest milk animal, residence and garden greater than 50 m2 (approximately 500 ft2) producing broad leaf vegetation within a distance of 8 km (approximately 5 miles) in each of the 16 meteorological sectors surrounding the SSES.

Distance in Miles from the SUSQUEHANNA NUCLEAR Reactor Buildings Meteorological Sector Nearest Residence July-Aug, 2022 miles Nearest Garden July-Sept, 2022 miles Nearest Dairy Farm July-Aug, 2022 miles 1 N 1.3 3.2

>5.0 2 NNE 1.0 2.3 a,c,e

>5.0 3 NE 0.9 2.7

>5.0 4 ENE 2.1 2.4 a,c

>5.0 5 E 1.6 4.9 4.5 d 6 ESE 0.5 3.1

>5.0 7 SE 0.6 0.6

>5.0 8 SSE 0.7 2.9

>5.0 9 S 1.1 3.5

>5.0 10 SSW 0.9 1.3 a,c

>5.0 d 11 SW 1.5 4.2

>5.0 12 WSW 1.3 1.3 1.7 13 W 1.4 3.2 5.0 14 WNW 1.1 3.6

>5.0 15 NW 0.8 2.3

>5.0 16 NNW 0.7 4.0

>5.0 a Chickens raised for consumption at this location b Ducks raised for consumption at this location c Eggs consumed from chickens at this location d Fruits/vegetables raised for consumption at this location e Beef cattle raised for consumption at this location f Rabbits raised for consumption at this location.

The 2022 Land Use Census results are summarized in the above table.

V.

Annotations to Previous AREOR There are no annotations to the previous AREOR.

VI.

Conclusions The Radiological Environmental Monitoring Program for SSES was conducted during 2022 in accordance with the SSES TRM and ODCM. The LLD values required by the TRM and ODCM were achieved for this reporting period (See Appendix A and Appendix C). The objectives of the program were also met during this period. The data collected assists in demonstrating that SSES was operated in compliance with TRM and ODCM requirements.

The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program, which ran from 1972 to 1982, and with results collected since commercial operation, it is concluded that operation of the SSES had no significant radiological impact on the health and safety of the public or the environment.

From the results obtained, it can be concluded that the levels and fluctuations of radioactivity in environmental samples were as expected for the environment surrounding the SSES.

VII.

References

[1]

Annual Radiological Environmental Operating Report, January 1 to December 31, 2022, prepared by Teledyne Brown Engineering, Knoxville TN.

[2]

Final Safety Analysis Report

[3]

Final Environmental Statement

[4]

Susquehanna Steam Electric Station, 2022 Land Use Census. Prepared for Susquehanna Nuclear, LLC, Berwick, PA. December 2022. Applied Ecoscience, Inc. Berwick, PA.

[5]

Susquehanna Nuclear, LLC. Radiological Environmental Monitoring Program, ODCM-QA-008, Rev. 21.

[6]

United States Nuclear Regulatory Commission. An Acceptable Radiological Environmental Monitoring Program. Radiological Assessment Branch Technical Position. November 1979, Revision 1. USNRC, Washington, DC.

[7]

NCRP Report No. 160, Ionizing Radiation Exposure of the Population of the United States, (2009).

[8]

Engineering Calculation EC-ENVR-1012, Interpretation of Environmental Direct Radiation Monitoring Results - Estimation of Direct Radiation Dose to Members of the Public Attributable to SSES Fuel Cycle Operations, Rev. 2.

May 2013 APPENDIX A PROGRAM

SUMMARY

A-1

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

Air Particulates GR-B 363 10 1.529E+01 (311/311) 13S6 1.571E+01 (52/52) 1.448E+01 (52/52) 0 (E-3 pCi/m3) 0.4 MILES W (7.430E+00 - 2.330E+01)

GAMMA 28 BE-7 28 N/A 1.054E+02 (24/24) 10S3 1.124E+02 (4/4) 1.038E+02 (4/4) 0 0.6 MILES SSW (8.401E+01 - 1.267E+02)

K-40 28 N/A

<MDC (0/24)

<MDC (0/4) 0 CS-134 28 50

<MDC (0/24)

<MDC (0/4) 0 CS-137 28 60

<MDC (0/24)

<MDC (0/4) 0 Charcoal GAMMA 363 (E-3 pCi/m3)

I-131 363 70

<MDC (0/311)

<MDC (0/52) 0 Ambient Radiation OSLD 226 N/A 1.627E+01 (206/206) 9S2 3.948E+01 (4/4) 1.447E+01 (20/20) 0 (mR/std. qtr.)

0.2 MILES S (3.554E+01 - 4.166E+01)

Milk I-131 60 1

<MDC (0/40)

<MDC (0/20) 0 (pCi/Liter)

GAMMA 60 K-40 60 N/A 1.224E+03 (40/40) 10G1 C 1.312E+03 (20/20) 1.312E+03 (20/20) 0 14 MILES SSW (1.129E+03 - 1.430E+03)

CS-134 60 15

<MDC (0/40)

<MDC (0/20) 0 (6.932E+01 - 1.291E+02)

(1.228E+01 - 1.793E+01)

(1.129E+03 - 1.430E+03)

<MDC

<MDC (8.493E+00 - 4.166E+01)

<MDC

<MDC TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 (5.960E+00 - 4.910E+01)

(5.920E+00 - 2.740E+01)

(6.306E+01 - 1.373E+02)

(1.026E+03 - 1.432E+03)

<MDC

<MDC A-2

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Milk (cont'd)

CS-137 60 18

<MDC (0/40)

<MDC (0/20) 0 (pCi/Liter)

BA-140 60 60

<MDC (0/40)

<MDC (0/20) 0 LA-140 60 15

<MDC (0/40)

<MDC (0/20) 0 TH-228 60 N/A

<MDC (0/40)

<MDC (0/20) 0 Ground Water H-3 44 2000 3.700E+02 (1/40) 4S8 3.700E+02 (1/4)

<MDC (0/4) 0 (pCi/Liter) 0.1 MILES ENE (3.700E+02)

GAMMA 44 K-40 44 N/A

<MDC (0/40)

<MDC (0/4) 0 MN-54 44 15

<MDC (0/40)

<MDC (0/4) 0 CO-58 44 15

<MDC (0/40)

<MDC (0/4) 0 FE-59 44 30

<MDC (0/40)

<MDC (0/4) 0 CO-60 44 15

<MDC (0/40)

<MDC (0/4) 0

<MDC

<MDC (3.700E+02)

<MDC

<MDC A-3

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Ground Water (cont'd)

ZN-65 44 30

<MDC (0/40)

<MDC (0/4) 0 (pCi/Liter)

NB-95 44 15

<MDC (0/40)

<MDC (0/4) 0 ZR-95 44 30

<MDC (0/40)

<MDC (0/4) 0 I-131 44 15

<MDC (0/40)

<MDC (0/4) 0 CS-134 44 15

<MDC (0/40)

<MDC (0/4) 0 CS-137 44 18

<MDC (0/40)

<MDC (0/4) 0 BA-140 44 60

<MDC (0/40)

<MDC (0/4) 0 LA-140 44 15

<MDC (0/40)

<MDC (0/4) 0 TH-228 44 N/A

<MDC (0/40)

<MDC (0/4) 0 Drinking Water GR-B 12 4

2.889E+00 (7/12) 12H2 2.889E+00 (7/12) 0 (pCi/Liter) 26 MILES WSW (2.230E+00 - 3.220E+00)

H-3 12 2000

<MDC (0/12) 0 (2.230E+00 - 3.220E+00)

<MDC

<MDC N/A

<MDC

<MDC N/A A-4

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Drinking Water (cont'd)

GAMMA 12 (pCi/Liter)

K-40 12 N/A

<MDC (0/12) 0 MN-54 12 15

<MDC (0/12) 0 CO-58 12 15

<MDC (0/12) 0 FE-59 12 30

<MDC (0/12) 0 CO-60 12 15

<MDC (0/12) 0 ZN-65 12 30

<MDC (0/12) 0 NB-95 12 15

<MDC (0/12) 0 ZR-95 12 30

<MDC (0/12) 0 I-131 12 15

<MDC (0/12) 0 CS-134 12 15

<MDC (0/12) 0

<MDC

<MDC N/A N/A N/A N/A N/A

<MDC

<MDC N/A N/A N/A

<MDC N/A

<MDC

<MDC N/A A-5

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Drinking Water (cont'd)

CS-137 12 18

<MDC (0/12) 0 (pCi/Liter)

BA-140 12 60

<MDC (0/12) 0 LA-140 12 15

<MDC (0/12) 0 Food/Garden Crops GAMMA 12 (pCi/kg wet)

BE-7 12 N/A 6.650E+02 (8/12) 11S6 6.650E+02 (8/10) 0 0.5 MILES SW (3.112E+02 - 9.828E+02)

K-40 12 N/A 4.389E+03 (12/12) 11D1 8.749E+03 (2/2) 0 3.3 MILES SW (2.838E+03 - 1.466E+04)

MN-54 12 N/A

<MDC (0/12) 0 CO-58 12 N/A

<MDC (0/12) 0 FE-59 12 N/A

<MDC (0/12) 0 CO-60 12 N/A

<MDC (0/12) 0 ZN-65 12 N/A

<MDC (0/12) 0 (3.112E+02 - 9.828E+02)

N/A N/A

<MDC

<MDC N/A N/A N/A N/A

<MDC

<MDC N/A

<MDC (2.598E+03 - 1.466E+04)

N/A

<MDC A-6

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Food/Garden Crops (cont'd) NB-95 12 N/A

<MDC (0/12) 0 (pCi/kg wet)

ZR-95 12 N/A

<MDC (0/12) 0 I-131 12 60

<MDC (0/12) 0 CS-134 12 60

<MDC (0/12) 0 CS-137 12 80

<MDC (0/12) 0 BA-140 12 N/A

<MDC (0/12) 0 LA-140 12 N/A

<MDC (0/12) 0 AC-228 12 N/A

<MDC (0/12) 0 TH-228 12 N/A

<MDC (0/12) 0 N/A N/A N/A N/A N/A N/A N/A

<MDC N/A N/A

<MDC

<MDC A-7

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Surface Water H-3 24 2000

<MDC (0/12)

<MDC (0/12) 0 (pCi/Liter)

GAMMA 24 K-40 24 N/A

<MDC (0/12)

<MDC (0/12) 0 MN-54 24 15

<MDC (0/12)

<MDC (0/12) 0 CO-58 24 15

<MDC (0/12)

<MDC (0/12) 0 FE-59 24 30

<MDC (0/12)

<MDC (0/12) 0 CO-60 24 15

<MDC (0/12)

<MDC (0/12) 0 ZN-65 24 30

<MDC (0/12)

<MDC (0/12) 0 NB-95 24 15

<MDC (0/12)

<MDC (0/12) 0 ZR-95 24 30

<MDC (0/12)

<MDC (0/12) 0 I-131 24 15

<MDC (0/12)

<MDC (0/12) 0

<MDC

<MDC A-8

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Surface Water (cont'd)

CS-134 24 15

<MDC (0/12)

<MDC (0/12) 0 (pCi/Liter)

CS-137 24 18

<MDC (0/12)

<MDC (0/12) 0 BA-140 24 60

<MDC (0/12)

<MDC (0/12) 0 LA-140 24 15

<MDC (0/12)

<MDC (0/12) 0 TH-228 24 N/A

<MDC (0/12)

<MDC (0/12) 0 Fish GAMMA 14 (pCi/kg wet)

K-40 14 N/A 3.525E+03 (8/8)

LTAW 3.722E+03 (2/2) 3.475E+03 (6/6) 0 0.7 MILES NE-ESE (2.514E+03 - 4.929E+03)

MN-54 14 130

<MDC (0/8)

<MDC (0/6) 0 CO-58 14 130

<MDC (0/8)

<MDC (0/6) 0 FE-59 14 260

<MDC (0/8)

<MDC (0/6) 0 CO-60 14 130

<MDC (0/8)

<MDC (0/6) 0 (2.788E+03 - 4.030E+03)

(2.342E+03 - 4.929E+03)

<MDC

<MDC A-9

LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY OF CONTROL LOCATION NONROUTINE SAMPLED DETECTION MEAN (3)

NAME MEAN (3)

MEAN (3)

REPORTED (UNIT OF MEASUREMENT)

(LLD) (2)

RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (4)

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA ANALYSIS AND TOTAL NUMBER OF ANALYSIS PERFORMED (1)

LOCATION WITH HIGHEST MEAN ALL INDICATOR LOCATIONS Reporting Period: December 29, 2021 to January 6, 2023 Fish (cont'd)

ZN-65 14 260

<MDC (0/8)

<MDC (0/6) 0 (pCi/kg wet)

CS-134 14 130

<MDC (0/8)

<MDC (0/6) 0 CS-137 14 150

<MDC (0/8)

<MDC (0/6) 0 Sediment GAMMA 6

(pCi/kg dry)

K-40 6

N/A 1.121E+04 (4/4) 12F 1.216E+04 (2/2) 1.083E+04 (2/2) 0 6.9 MILES WSW (8.987E+03 - 1.533E+04)

CS-134 6

150

<MDC (0/4)

<MDC (0/2) 0 CS-137 6

180

<MDC (0/4)

<MDC (0/2) 0 RA-226 6

N/A 3.465E+03 (1/4) 12F 3.465E+03 (1/2)

<MDC (0/2) 0 6.9 MILES WSW AC-228 6

N/A 1.054E+03 (4/4) 12F 1.223E+03 (2/2) 9.213E+02 (2/2) 0 6.9 MILES WSW (8.795E+02 - 1.567E+03)

TH-228 6

N/A 8.464E+02 (4/4) 2B C 8.857E+02 (2/2) 8.857E+02 (2/2) 0 1.6 MILES NNE (6.143E+02 - 1.157E+03)

1. The total number of analyses does not include duplicates, splits or repeated analyses.

2. The Technical Requirement LLDs are shown when applicable.

3. The mean and range are based on all results above MDC. The ratio indicated in parentheses is the total number of results used to calculate the mean to the total number of samples.

4. USNRC Reporting Levels are specified in the Technical Requirements (i.e., when Reporting Levels in Technical Requirements are exceeded).

(8.246E+03 - 1.533E+04)

(1.016E+04 - 1.150E+04)

(7.996E+02 - 1.043E+03)

(6.143E+02 - 1.157E+03)

(3.465E+3)

(7.162E+02 - 1.567E+03)

(6.705E+02 - 1.014E+03)

<MDC

<MDC (3.465E+3)

<MDC

<MDC A-10

APPENDIX B SAMPLE DESIGNATION AND LOCATIONS B-1

SAMPLE DESIGNATION All distances from the SSES to monitoring locations are measured from the standby gas treatment vent at 44200/N34117 (Pa. Grid System). The location codes are based on both distance and direction from the SSES. The letters in the location codes indicate if the monitoring locations are on site (within the site boundary) or, if they are not on site, the approximate distances of the location from the SSES as described below:

S

= On site E

= 4 - 5 miles A

= < 1 mile F

= 5 - 10 miles B

= 1 - 2 miles G

= 10 - 20 miles C

= 2 - 3 miles H = > 20 miles D

= 3 - 4 miles The numbers preceding the letters in the location codes provide the direction of the monitoring locations from the SSES by indicating the sectors in which they are located. A total number of 16 sectors (numbered one through 16) equally divide an imaginary circle on a map of the SSES and its vicinity, with the SSES at the center of the circle. The middle of sector one is directed due North (N). Moving clockwise from sector one, the sector immediately adjacent to sector one is sector two, the middle of which is directed due north, north east (NNE). Continuing to move clockwise the sector number increases to 16, which is the north northwest sector (NNW).

B-2

TABLE B-1 SAMPLING LOCATIONS Specific information about the individual sampling locations are given in Table B-1. Maps B-1 through B-6 show the locations of sampling stations with respect to the Site. A Portable Global Positioning System (GPS) was used to provide the coordinates of sampling locations.

STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

6S5 0.9 mi.ESE; 41.084639

-76.130642 Surface water 6S6 **

0.8 mi.ESE; 41.088115

-76.131637 Surface water LTAW 0.7 mi.NE-ESE; 41.098356

-76.135401 Fish 10S3 0.6 mi. SSW; 41.085264

-76.152128 Air 12S1 0.4 mi.WSW; 41.088436

-76.154314 Air 13S6 0.4 mi.W; 41.091771

-76.153869 Air 3S2 0.5 mi NE; 41.095716

-76.140207 Air 1S4 0.1 mi N; 41.093302

-76.145853 Ground water 2S8 0.1 mi.NNE; 41.094991

-76..044207 Ground water 6S11A 0.4 mi.ESE; 41.083448

-76.133412 Ground water 6S12 0.8 mi.ESE; 41.083411

-76.116935 Ground water 7S11 0.3 mi.SE; 41.083527

-76.133513 Ground water 1S3 0.1 mi N; 41.093640

-76.146076 Ground water 4S8 0.1 mi.ENE; 41.092306

-76.144283 Ground water 4S9 0.3 mi.E; 41.093369

-76.141644 Ground water 8S4 0.1 mi.SSE; 41.091424

-76.145531 Ground water 7S10 0.3 mi.SE; 41.089736

-76.142783 Ground water 13S7 0.2 mi.W; 41.091236

-76.149647 Ground water 11S6 0.5 mi.SW; 41.085305

-76.152022 Broadleaf Site 1 0.1 mi.ESE; 41.092275

-76.145022 Precipitation Site 2 0.1 mi.SSE; 41.091309

-76.145708 Precipitation Site 3 0.1 mi.WSW; 41.091243

-76.147345 Precipitation Site 4 0.1 mi.NW; 41.093321

-76.147316 Precipitation

- Control Location B-3

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE FROM ONE to FIVE MILES FROM THE SSES DEG.

DEG.

IND 0.9 mi.ESE; 41.085141

-76.130174 Fish IND 1.4 mi.ESE; 41.075618

-76.132682 Fish 2B **

1.6 mi.NNE; 41.112441

-76.134758 Sediment 7B 1.2 mi.SE; 41.078924

-76.131548 Sediment 9B1 1.3 mi. SSW; 41.085264

-76.152128 Air 12E1 4.7 mi.WSW; 41.072418

-76.230554 Air 5E2 4.5 mi.E; 41.085184

-76.061099 Milk 13E3 5.0 mi.W; 41.100259

-76.241102 Milk 11D1 3.3 mi.SW; 41.055212

-76.186797 Food Products

- Control Location GREATER THAN FIVE MILES FROM THE SSES 12H2 26 mi.WSW; 40.947192

-76.604524 Drinking water 2H **

30 mi.NNE; 41.459508

-75.853096 Fish 12F 6.9 mi.WSW; 41.041323

-76.255396 Sediment 8G1 **

12 mi.SSE; 40.928886

-76.055092 Air 10G1 **

14 mi.SSW; 40.934847

-76.284449 Milk B-4

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE OSLD LOCATIONS LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

1S2 0.2 mi.N; 41.09566

-76.146121 OSLD 2S2 0.9 mi.NNE; 41.10207

-76.141192 OSLD 2S3 0.2 mi.NNE; 41.09486

-76.144101 OSLD 3S2 0.5 mi.NE; 41.09574

-76.140086 OSLD 3S3 0.9 mi.NE; 41.10183

-76.133127 OSLD 4S3 0.2 mi.ENE; 41.09322

-76.141934 OSLD 4S6 0.7 mi.ENE; 41.09687

-76.133807 OSLD 5S4 0.8 mi.E; 41.09286

-76.131604 OSLD 5S7 0.3 mi.E; 41.09199

-76.141165 OSLD 6S4 0.2 mi.ESE; 41.09132

-76.142616 OSLD 6S9 0.2 mi.ESE; 41.09067

-76.142966 OSLD 7S6 0.2 mi.SE; 41.08972

-76.14359 OSLD 7S7 0.4 mi.SE; 41.08745

-76.142033 OSLD 8S2 0.2 mi.SSE; 41.08907

-76.14437 OSLD 9S2 0.2 mi.S; 41.08952

-76.14322 OSLD 10S1 0.4 mi.SSW; 41.08663

-76.150082 OSLD 10S2 0.2 mi.SSW; 41.08894

-76.147881 OSLD 11S7 0.4 mi.SWN; 41.08832

-76.15297 OSLD 12S1 0.4 mi.WSW; 41.0887

-76.154112 OSLD 12S3 0.4 mi.WSW; 41.08968

-76.153192 OSLD 13S2 0.4 mi.W; 41.09198

-76.153166 OSLD 13S5 0.4 mi.W; 41.09179

-76.153167 OSLD 13S6 0.4 mi.W; 41.09177

-76.154073 OSLD 14S5 0.5 mi.WNW; 41.09503

-76.153787 OSLD 15S5 0.4 mi.NW; 41.09576

-76.15103 OSLD 16S1 0.3 mi.NNW; 41.09611

-76.147388 OSLD 16S2 0.3 mi.NNW; 41.09599

-76.148922 OSLD 6A4

0.6 mi.ESE; 41.08791

-76.136795 OSLD B-5

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG.

DEG.

8A3 0.9 mi.SSE; 41.07982

-76.1139078 OSLD 15A3

0.9 mi.NW; 41.10003

-76.1585 OSLD 16A2

0.8 mi.NNW; 41.1025

-76.151595 OSLD FROM ONE to FIVE MILES FROM THE SSES 12S7 1.1 mi.WSW; 41.08621

-76.165914 OSLD 8B2

1.4 mi.SSE; 41.07483

-76.130724 OSLD 9B1 1.3 mi.S; 41.07356

-76.147874 OSLD 10B3

1.7 mi.SSW; 41.07064

-76.156646 OSLD 1D5 4.0 mi.N; 41.14936

-76.144346 OSLD 8D3 4.0 mi.SSE; 41.03824

-76.121683 OSLD 9D4 3.6 mi.S; 41.04015

-76.144529 OSLD 10D1 3.0 mi.SSW; 41.05446

-76.175026 OSLD 12D2 3.7 mi.WSW; 41.07363

-76.213306 OSLD 14D1 3.6 mi.WNW; 41.10706

-76.211891 OSLD 3E1 4.7 mi NE; 41.13953

-76.082398 OSLD 4E2 4.7 mi.ENE; 41.12157

-76.064115 OSLD 5E2 4.5 mi. E; 41.08539

-76.060486 OSLD 6E1 4.7 mi.ESE; 41.07275

-76.059529 OSLD 7E1 4.2 mi.SE; 41.04891

-76.090309 OSLD 11E1 4.7 mi. SW; 41.05188

-76.218713 OSLD 12E1

4.7 mi.WSW; 41.0725

-76.230331 OSLD 13E4 4.1 mi.W; 41.08962

-76.223726 OSLD

Special Interest Area (other than controls)

B-6

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE GREATER THAN FIVE MILES FROM THE SSES DEG.

DEG.

2F1 5.9 mi.NNE; 41.16796

-76.09146 OSLD 15F1 5.4 mi.NW; 41.15595

-76.202506 OSLD 16F1 7.8 mi.NNW; 41.18985

-76.229283 OSLD 3G4 **

17 mi.NE; 41.23431

-76.869061 OSLD 4G1 **

14 mi.ENE; 41.13898

-75.885121 OSLD 7G1 **

14 mi.SE; 40.94636

-76.974184 OSLD 12G1 **

15 mi.WSW; 41.0262

-76.411566 OSLD 12G4 **

10 mi. WSW; 40.03868

-76.327731 OSLD

Special Interest Area (other than controls)

- Control Location B-7

TABLE B-2 SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Medium Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Ambient Radiation Dosimeter Quarterly SSES, HP-TP-205 Landauer Procedure L313, Inlight Dosimeter Analysis Air Gross Beta Weekly Applied Ecoscience, Appendix 2 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Air I-131 Weekly Applied Ecoscience, Appendix 2 TBE-2012 Radioiodine in Various Matrices Air Gamma Quarterly Applied Ecoscience, Appendix 2 TBE-2007 Gamma Emitting Radioisotope Analysis Drinking Water Gross Beta Monthly Applied Ecoscience, Appendix 5 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Surface &

Drinking Water Tritium Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation.

Surface &

Drinking Water Gamma Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2007 Gamma Emitting Radioisotope Analysis.

Ground Water Tritium Quarterly Applied Ecoscience, Appendix 8 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation Ground Water Gamma Quarterly Applied Ecoscience, Appendix 8 TBE-2007 Gamma Emitting Radioisotope Analysis B-8

TABLE B-2 (cont'd)

SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Medium Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Precipitation Tritium Monthly (Apr - Nov) /

Quarterly Applied Ecoscience, Appendix 10 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation Milk Gamma Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2007 Gamma Emitting Radioisotope Analysis Milk I-131 Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2012 Radioiodine in Various Matrices Fish Gamma Semi-Annually (Spring/Fall)

Applied Ecoscience, Appendix 11 TBE-2007 Gamma Emitting Radioisotope Analysis Sediment Gamma Semi-Annually (Spring/Fall)

Applied Ecoscience, Appendix 12 TBE-2007 Gamma Emitting Radioisotope Analysis Fruits &

Vegetables Gamma In Season (When available)

Applied Ecoscience, Appendix 13 Applied Ecoscience, Appendix 15 TBE-2007 Gamma Emitting Radioisotope Analysis B-9

MAP 8-1 Direct Radiation Monitoring Locations Within One Mile D

~i~

.. \\i*'

B-10

{

~:*

'ii

MAP 8-2 Direct Radiation Monitoring Locations From One to Five Miles

,t;;,

I

\\.,,.,.-

/

.....j B-11

MAP 8-3 Direct Radiation Monitoring Locations Greater Than Five Miles 1\\

\\

1,.....

B-12

MAP 8-4 Environmental Sampling Locations Within One Mile J

I rffe t

B-13

MAP 8-5 Environmental Sampling Locations From One to Five Miles B-14

MAP 8-6 Environmental Sampling Locations Greater Than Five Miles r

.. --~v

.run

\\ - ~ _/

~

-,.;-./,.,,-f

..,....,.-f -.......,____.

.1:-;-.e.r****!.........-

. ~4 --

."~\\ ~~f? ~

1*

"* ;, <~;

-. I ;,

.Cf!iltta,l:t.. _*;~? ~~!~~lo!,

,~,; - ::

.. -::i;-;~. -; ;,-*

,e-#

B-15

APPENDIX C DATA TABLES C-1

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 12/29/21 - 01/05/22 17 +/- 3 13 +/- 2 18 +/- 3 17 +/- 2 18 +/- 3 15 +/- 2 01/05/22 - 01/12/22 21 +/- 3 25 +/- 3 21 +/- 3 21 +/- 3 23 +/- 3 22 +/- 3 01/12/22 - 01/19/22 23 +/- 3 20 +/- 3 24 +/- 3 22 +/- 3 23 +/- 3 20 +/- 3 01/19/22 - 01/26/22 17 +/- 3 20 +/- 3 19 +/- 3 17 +/- 2 21 +/- 3 19 +/- 3 01/26/22 - 02/01/22 19 +/- 3 20 +/- 3 22 +/- 3 18 +/- 3 19 +/- 3 16 +/- 3 02/01/22 - 02/09/22 14 +/- 2 11 +/- 2 13 +/- 2 13 +/- 2 14 +/- 2 15 +/- 2 02/09/22 - 02/16/22 15 +/- 2 14 +/- 2 15 +/- 2 15 +/- 2 15 +/- 3 15 +/- 2 02/16/22 - 02/23/22 17 +/- 3 15 +/- 2 14 +/- 2 14 +/- 2 16 +/- 3 13 +/- 2 02/23/22 - 03/02/22 15 +/- 2 16 +/- 2 15 +/- 2 17 +/- 2 17 +/- 2 16 +/- 2 03/02/22 - 03/09/22 17 +/- 3 15 +/- 2 16 +/- 2 14 +/- 2 19 +/- 3 14 +/- 2 03/09/22 - 03/16/22 15 +/- 2 16 +/- 2 14 +/- 2 13 +/- 2 18 +/- 3 16 +/- 2 03/16/22 - 03/23/22 17 +/- 2 12 +/- 2 13 +/- 2 14 +/- 2 17 +/- 2 16 +/- 2 03/23/22 - 03/30/22 8 +/- 2 8 +/- 2 8 +/- 2 7 +/- 2 9 +/- 2 8 +/- 2 03/30/22 - 04/06/22 13 +/- 2 11 +/- 2 16 +/- 2 11 +/- 2 14 +/- 2 13 +/- 2 04/06/22 - 04/13/22 7 +/- 2 7 +/- 2 7 +/- 2 6 +/- 2 7 +/- 2 7 +/- 2 04/13/22 - 04/20/22 10 +/- 2 9 +/- 2 10 +/- 2 10 +/- 2 12 +/- 2 11 +/- 2 04/20/22 - 04/27/22 17 +/- 2 16 +/- 2 15 +/- 2 18 +/- 3 15 +/- 2 14 +/- 2 04/27/22 - 05/04/22 15 +/- 2 16 +/- 2 15 +/- 2 17 +/- 2 15 +/- 2 14 +/- 2 05/04/22 - 05/11/22 15 +/- 2 14 +/- 2 15 +/- 2 16 +/- 2 16 +/- 2 15 +/- 2 05/11/22 - 05/18/22 7 +/- 2 6 +/- 2 8 +/- 2 6 +/- 2 9 +/- 2 7 +/- 2 05/18/22 - 05/25/22 14 +/- 2 14 +/- 2 13 +/- 2 15 +/- 2 15 +/- 2 13 +/- 2 05/25/22 - 06/01/22 12 +/- 2 15 +/- 2 11 +/- 2 14 +/- 2 13 +/- 2 13 +/- 2 06/01/22 - 06/08/22 17 +/- 3 14 +/- 2 15 +/- 2 14 +/- 2 16 +/- 3 15 +/- 2 06/08/22 - 06/15/22 11 +/- 2 11 +/- 2 10 +/- 2 10 +/- 2 11 +/- 2 12 +/- 2 06/15/22 - 06/22/22 11 +/- 2 9 +/- 2 9 +/- 2 10 +/- 2 10 +/- 2 9 +/- 2 06/22/22 - 06/29/22 10 +/- 2 8 +/- 2 9 +/- 2 9 +/- 2 9 +/- 2 10 +/- 2 06/29/22 - 07/06/22 17 +/- 3 20 +/- 3 19 +/- 3 16 +/- 3 19 +/- 3 17 +/- 2 07/06/22 - 07/12/22 11 +/- 2 14 +/- 3 12 +/- 2 13 +/- 3 15 +/- 3 14 +/- 3 07/12/22 - 07/20/22 15 +/- 2 16 +/- 2 13 +/- 2 15 +/- 2 18 +/- 2 14 +/- 2 07/20/22 - 07/27/22 19 +/- 3 19 +/- 3 17 +/- 2 19 +/- 3 19 +/- 3 20 +/- 3 07/27/22 - 08/02/22 21 +/- 3 17 +/- 3 20 +/- 3 17 +/- 3 17 +/- 3 20 +/- 3 08/02/22 - 08/09/22 17 +/- 2 15 +/- 2 16 +/- 2 13 +/- 2 18 +/- 3 14 +/- 2 08/09/22 - 08/17/22 14 +/- 2 15 +/- 2 15 +/- 2 16 +/- 2 16 +/- 2 14 +/- 2 08/17/22 - 08/24/22 17 +/- 2 15 +/- 2 17 +/- 2 16 +/- 2 19 +/- 3 16 +/- 2 08/24/22 - 08/31/22 23 +/- 3 22 +/- 3 24 +/- 3 21 +/- 3 22 +/- 3 24 +/- 3 08/31/22 - 09/07/22 13 +/- 2 10 +/- 2 12 +/- 2 12 +/- 2 14 +/- 2 15 +/- 2 09/07/22 - 09/14/22 11 +/- 2 12 +/- 2 14 +/- 2 12 +/- 2 12 +/- 2 11 +/- 2 09/14/22 - 09/21/22 19 +/- 2 20 +/- 3 20 +/- 3 18 +/- 3 17 +/- 2 20 +/- 3 09/21/22 - 09/28/22 49 +/- 12 12 +/- 2 18 +/- 2 17 +/- 2 14 +/- 2 17 +/- 2 09/28/22 - 10/05/22 (a) 11 +/- 2 11 +/- 2 9 +/- 2 11 +/- 2 11 +/- 2 10/05/22 - 10/12/22 21 +/- 4 20 +/- 3 19 +/- 3 18 +/- 3 20 +/- 2 17 +/- 2 10/12/22 - 10/18/22 18 +/- 3 19 +/- 3 23 +/- 3 20 +/- 3 21 +/- 3 22 +/- 3 10/18/22 - 10/26/22 12 +/- 2 13 +/- 2 16 +/- 2 15 +/- 2 14 +/- 2 15 +/- 2 10/26/22 - 11/02/22 9 +/- 2 10 +/- 2 10 +/- 2 11 +/- 2 12 +/- 2 13 +/- 2 11/02/22 - 11/09/22 17 +/- 2 14 +/- 2 19 +/- 2 19 +/- 2 19 +/- 2 18 +/- 2 11/09/22 - 11/15/22 11 +/- 2 10 +/- 2 11 +/- 2 9 +/- 2 9 +/- 2 12 +/- 2 11/15/22 - 11/22/22 13 +/- 2 13 +/- 2 16 +/- 2 13 +/- 2 15 +/- 2 14 +/- 2 11/22/22 - 11/30/22 20 +/- 2 18 +/- 2 21 +/- 2 21 +/- 2 22 +/- 3 24 +/- 3 11/30/22 - 12/07/22 16 +/- 2 15 +/- 2 18 +/- 2 19 +/- 2 18 +/- 2 17 +/- 2 12/07/22 - 12/14/22 12 +/- 2 10 +/- 2 16 +/- 2 16 +/- 2 15 +/- 2 15 +/- 2 12/14/22 - 12/21/22 11 +/- 2 12 +/- 2 13 +/- 2 11 +/- 2 10 +/- 2 11 +/- 2 12/21/22 - 12/28/22 15 +/- 2 27 +/- 3 20 +/- 2 17 +/- 2 19 +/- 2 20 +/- 2 16 +/- 12 14 +/- 9 15 +/- 8 15 +/- 8 16 +/- 8 15 +/- 8 (a) Sample unable to be obtained due to no power at the station.

AVERAGE C-2

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 12/29/21 - 01/05/22 16 +/- 2 01/05/22 - 01/12/22 22 +/- 3 01/12/22 - 01/19/22 23 +/- 3 01/19/22 - 01/26/22 19 +/- 3 01/26/22 - 02/01/22 20 +/- 3 02/01/22 - 02/09/22 13 +/- 2 02/09/22 - 02/16/22 13 +/- 2 02/16/22 - 02/23/22 15 +/- 2 02/23/22 - 03/02/22 15 +/- 2 03/02/22 - 03/09/22 15 +/- 2 03/09/22 - 03/16/22 15 +/- 2 03/16/22 - 03/23/22 16 +/- 2 03/23/22 - 03/30/22 8 +/- 2 03/30/22 - 04/06/22 11 +/- 2 04/06/22 - 04/13/22 8 +/- 2 04/13/22 - 04/20/22 11 +/- 2 04/20/22 - 04/27/22 14 +/- 2 04/27/22 - 05/04/22 16 +/- 2 05/04/22 - 05/11/22 15 +/- 2 05/11/22 - 05/18/22 7 +/- 2 05/18/22 - 05/25/22 14 +/- 2 05/25/22 - 06/01/22 13 +/- 2 06/01/22 - 06/08/22 16 +/- 3 06/08/22 - 06/15/22 12 +/- 2 06/15/22 - 06/22/22 10 +/- 2 06/22/22 - 06/29/22 10 +/- 2 06/29/22 - 07/06/22 17 +/- 3 07/06/22 - 07/12/22 12 +/- 3 07/12/22 - 07/20/22 17 +/- 2 07/20/22 - 07/27/22 21 +/- 3 07/27/22 - 08/02/22 19 +/- 3 08/02/22 - 08/09/22 16 +/- 2 08/09/22 - 08/17/22 16 +/- 2 08/17/22 - 08/24/22 19 +/- 2 08/24/22 - 08/31/22 26 +/- 3 08/31/22 - 09/07/22 15 +/- 2 09/07/22 - 09/14/22 13 +/- 2 09/14/22 - 09/21/22 21 +/- 3 09/21/22 - 09/28/22 16 +/- 2 09/28/22 - 10/05/22 12 +/- 2 10/05/22 - 10/12/22 20 +/- 3 10/12/22 - 10/18/22 25 +/- 3 10/18/22 - 10/26/22 12 +/- 2 10/26/22 - 11/02/22 11 +/- 2 11/02/22 - 11/09/22 18 +/- 2 11/09/22 - 11/15/22 13 +/- 2 11/15/22 - 11/22/22 14 +/- 2 11/22/22 - 11/30/22 23 +/- 2 11/30/22 - 12/07/22 18 +/- 2 12/07/22 - 12/14/22 15 +/- 2 12/14/22 - 12/21/22 12 +/- 2 12/21/22 - 12/28/22 18 +/- 2 15 +/- 9 AVERAGE C-3

TABLE C-2 GAMMA SPECTROSCOPIC ANALYSES OF COMPOSITED AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION SITE PERIOD Be-7 K-40 Cs-134 Cs-137 8G1 12/29/21 - 03/30/22 108 +/- 18

< 12

< 1

< 1 03/30/22 - 06/29/22 129 +/- 26

< 27

< 1

< 1 06/29/22 - 09/28/22 109 +/- 18

< 17

< 1

< 1 09/28/22 - 12/28/22 69 +/- 16

< 20

< 1

< 1 AVERAGE 104 +/- 50 3S2 12/29/21 - 03/30/22 118 +/- 19

< 14

< 1

< 1 03/30/22 - 06/29/22 106 +/- 27

< 30

< 2

< 1 06/29/22 - 09/22/22 134 +/- 24

< 18

< 1

< 1 10/08/22 - 12/28/22 68 +/- 15

< 16

< 1

< 1 AVERAGE 106 +/- 56 12E1 12/29/21 - 03/30/22 98 +/- 18

< 16

< 1

< 1 03/30/22 - 06/29/22 108 +/- 22

< 20

< 1

< 1 06/29/22 - 09/28/22 122 +/- 34

< 29

< 1

< 1 09/28/22 - 12/28/22 70 +/- 18

< 19

< 1

< 1 AVERAGE 100 +/- 44 12S1 12/29/21 - 03/30/22 106 +/- 21

< 20

< 1

< 1 03/30/22 - 06/29/22 109 +/- 19

< 16

< 1

< 1 06/29/22 - 09/28/22 128 +/- 22

< 20

< 1

< 1 09/28/22 - 12/28/22 63 +/- 23

< 22

< 1

< 1 AVERAGE 102 +/- 55 13S6 12/29/21 - 03/30/22 108 +/- 20

< 19

< 1

< 1 03/30/22 - 06/29/22 97 +/- 17

< 15

< 1

< 1 06/29/22 - 09/28/22 137 +/- 25

< 19

< 1

< 1 09/28/22 - 12/28/22 70 +/- 17

< 20

< 1

< 1 AVERAGE 103 +/- 56 9B1 12/29/21 - 03/30/22 114 +/- 23

< 18

< 1

< 1 03/30/22 - 06/29/22 117 +/- 21

< 14

< 1

< 1 06/29/22 - 09/28/22 134 +/- 23

< 21

< 1

< 1 09/28/22 - 12/28/22 72 +/- 17

< 16

< 1

< 1 AVERAGE 109 +/- 53 10S3 12/29/21 - 03/30/22 124 +/- 24

< 24

< 1

< 1 03/30/22 - 06/29/22 127 +/- 19

< 16

< 1

< 1 06/29/22 - 09/28/22 115 +/- 22

< 17

< 0

< 1 09/28/22 - 12/28/22 84 +/- 19

< 14

< 1

< 1 AVERAGE 112 +/- 39 C-4

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 12/29/21 - 01/05/22

< 4

< 10

< 19 01/05/22 - 01/12/22

< 4

< 14

< 8

< 9 01/12/22 - 01/19/22

< 8

< 19

< 16

< 15

< 9 01/19/22 - 01/26/22

< 8

< 14

< 13

< 12

< 13

< 7 01/26/22 - 02/01/22

< 10

< 17

< 19

< 18

< 19

< 8 02/01/22 - 02/09/22

< 4

< 7

< 8 02/09/22 - 02/16/22

< 12

< 20

< 13

< 12

< 8

< 9 02/16/22 - 02/23/22

< 11

< 14

< 12

< 7

< 7 02/23/22 - 03/02/22

< 12

< 18

< 12

< 8

< 9 03/02/22 - 03/09/22

< 19

< 9

< 12

< 9 03/09/22 - 03/16/22

< 8

< 9

< 16

< 4 03/16/22 - 03/23/22

< 4

< 6

< 7

< 7 03/23/22 - 03/30/22

< 8

< 20

< 19

< 13

< 10 03/30/22 - 04/06/22

< 9

< 12

< 7

< 11

< 18

< 12 04/06/22 - 04/13/22

< 12

< 14

< 13

< 14

< 7 04/13/22 - 04/20/22

< 12

< 9

< 19

< 20

< 18 04/20/22 - 04/27/22

< 3

< 10

< 8

< 17 04/27/22 - 05/04/22

< 6

< 8

< 12

< 13

< 20 05/04/22 - 05/11/22

< 3

< 11

< 8

< 18 05/11/22 - 05/18/22

< 9

< 13

< 3

< 8

< 9

< 8 05/18/22 - 05/25/22

< 9

< 10

< 16

< 17

< 18

< 17 05/25/22 - 06/01/22

< 5

< 12

< 11

< 12

< 5 06/01/22 - 06/08/22

< 8

< 9

< 8

< 8 06/08/22 - 06/15/22

< 4

< 9

< 7

< 8

< 19 06/15/22 - 06/22/22

< 3

< 4

< 7

< 9 06/22/22 - 06/29/22

< 5

< 9

< 10

< 11

< 18 06/29/22 - 07/06/22

< 9

< 4

< 9

< 9 07/06/22 - 07/12/22

< 7

< 8

< 16

< 17

< 16 07/12/22 - 07/20/22

< 5

< 3

< 10

< 11

< 7 07/20/22 - 07/27/22

< 14

< 8

< 13

< 14

< 6

< 20 07/27/22 - 08/02/22

< 17

< 19

< 10

< 8

< 18 08/02/22 - 08/09/22

< 10

< 12

< 10

< 4

< 14 08/09/22 - 08/17/22

< 18

< 10

< 18

< 16

< 18 08/17/22 - 08/24/22

< 19

< 7

< 18

< 19

< 9

< 14 08/24/22 - 08/31/22

< 15

< 8

< 16

< 8

< 15

< 17 08/31/22 - 09/07/22

< 19

< 9

< 19

< 10

< 18

< 19 09/07/22 - 09/14/22

< 12

< 17

< 18

< 9 09/14/22 - 09/21/22

< 4

< 10

< 11

< 10

< 5 09/21/22 - 09/28/22

< 31

< 10

< 8

< 4 09/28/22 - 10/05/22 (a)

< 10

< 11

< 5

< 4 10/05/22 - 10/12/22

< 10

< 16

< 6

< 3

< 6

< 7 10/12/22 - 10/18/22

< 9

< 8

< 9

< 19

< 4 10/18/22 - 10/26/22

< 18

< 8

< 9

< 8 10/26/22 - 11/02/22

< 9

< 11

< 12

< 18

< 5 11/02/22 - 11/09/22

< 9

< 10

< 18

< 4 11/09/22 - 11/15/22

< 8

< 12

< 5

< 17

< 13 11/15/22 - 11/22/22

< 9

< 18

< 10

< 19

< 19 11/22/22 - 11/30/22

< 11

< 8

< 11

< 12

< 5

< 8 11/30/22 - 12/07/22

< 8

< 9

< 8

< 4

< 9

< 6 12/07/22 - 12/14/22

< 11

< 20

< 11

< 5

< 12

< 9 12/14/22 - 12/21/22

< 20

< 18

< 20

< 10

< 19 12/21/22 - 12/28/22

< 9

< 12

< 18

< 20

< 17 (a) Sample unable to be obtained due to no power at the station.

AVERAGE C-5

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 12/29/21 - 01/05/22

< 9 01/05/22 - 01/12/22

< 8 01/12/22 - 01/19/22

< 15 01/19/22 - 01/26/22

< 12 01/26/22 - 02/01/22

< 18 02/01/22 - 02/09/22

< 7 02/09/22 - 02/16/22

< 12 02/16/22 - 02/23/22

< 11 02/23/22 - 03/02/22

< 12 03/02/22 - 03/09/22

< 3 03/09/22 - 03/16/22

< 16 03/16/22 - 03/23/22

< 7 03/23/22 - 03/30/22

< 19 03/30/22 - 04/06/22

< 11 04/06/22 - 04/13/22

< 14 04/13/22 - 04/20/22

< 19 04/20/22 - 04/27/22

< 8 04/27/22 - 05/04/22

< 13 05/04/22 - 05/11/22

< 8 05/11/22 - 05/18/22

< 9 05/18/22 - 05/25/22

< 17 05/25/22 - 06/01/22

< 12 06/01/22 - 06/08/22

< 4 06/08/22 - 06/15/22

< 8 06/15/22 - 06/22/22

< 7 06/22/22 - 06/29/22

< 11 06/29/22 - 07/06/22

< 4 07/06/22 - 07/12/22

< 17 07/12/22 - 07/20/22

< 11 07/20/22 - 07/27/22

< 13 07/27/22 - 08/02/22

< 19 08/02/22 - 08/09/22

< 10 08/09/22 - 08/17/22

< 18 08/17/22 - 08/24/22

< 18 08/24/22 - 08/31/22

< 16 08/31/22 - 09/07/22

< 19 09/07/22 - 09/14/22

< 17 09/14/22 - 09/21/22

< 11 09/21/22 - 09/28/22

< 10 09/28/22 - 10/05/22

< 10 10/05/22 - 10/12/22

< 6 10/12/22 - 10/18/22

< 8 10/18/22 - 10/26/22

< 4 10/26/22 - 11/02/22

< 11 11/02/22 - 11/09/22

< 10 11/09/22 - 11/15/22

< 12 11/15/22 - 11/22/22

< 19 11/22/22 - 11/30/22

< 11 11/30/22 - 12/07/22

< 8 12/07/22 - 12/14/22

< 11 12/14/22 - 12/21/22

< 18 12/21/22 - 12/28/22

< 19 AVERAGE C-6

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/19/2022 to 3/24/2022 3/24/2022 to 7/1/2022 7/1/2022 to 10/1/2022 10/1/2022 to 1/6/2023 LOCATION ONSITE 1S2 17.7 +/- 0.2 (4) 25.3 +/- 0.8 25.6 +/- 0.6 2S2 12.1 +/- 1.3 13.1 +/- 0.1 13.5 +/- 0.6 12.5 +/- 0.8 2S3 19.9 +/- 0.6 (4) 23.0 +/- 0.1 17.0 +/- 0.5 3S2 12.4 +/- 1.5 12.6 +/- 0.5 13.3 +/- 0.8 11.3 +/- 2.6 3S3 13.3 +/- 2.0 13.4 +/- 0.5 13.7 +/- 0.7 9.4 +/- 3.2 4S3 19.3 +/- 0.5 17.7 +/- 0.1 20.8 +/- 0.7 18.5 +/- 2.1 4S6 10.8 +/- 1.0 13.2 +/- 1.4 15.4 +/- 1.7 11.8 +/- 1.6 5S4 10.1 +/- 1.0 11.9 +/- 1.7 12.4 +/- 0.3 10.8 +/- 4.1 5S7 15.9 +/- 1.9 14.5 +/- 0.2 16.8 +/- 1.2 17.3 +/- 4.3 6S4 22.0 +/- 3.7 22.6 +/- 1.4 21.7 +/- 2.1 22.7 +/- 1.1 6S9 16.8 +/- 5.2 21.2 +/- 1.0 22.4 +/- 0.3 20.2 +/- 0.8 7S6 16.3 +/- 2.2 21.2 +/- 1.7 23.5 +/- 1.0 19.6 +/- 1.0 7S7 10.5 +/- 0.3 13.8 +/- 0.1 12.7 +/- 0.4 9.7 +/- 1.3 8S2 21.3 +/- 0.8 19.0 +/- 1.0 22.0 +/- 0.7 22.5 +/- 3.1 9S2 39.4 +/- 1.5 35.5 +/- 3.7 41.4 +/- 1.7 41.7 +/- 1.1 10S1 12.7 +/- 1.3 13.1 +/- 0.7 13.8 +/- 1.5 13.6 +/- 0.1 10S2 25.6 +/- 0.2 24.6 +/- 1.1 25.7 +/- 0.3 20.8 +/- 3.9 11S7 13.0 +/- 0.3 13.9 +/- 0.6 14.2 +/- 1.5 12.6 +/- 1.9 12S1 13.3 +/- 2.7 16.6 +/- 0.6 15.6 +/- 0.3 13.9 +/- 0.5 12S3 18.4 +/- 3.2 18.7 +/- 0.5 19.4 +/- 1.3 17.7 +/- 1.2 12S7 14.7 +/- 0.7 14.3 +/- 0.6 15.1 +/- 1.2 12.5 +/- 0.7 13S2 19.9 +/- 3.3 18.9 +/- 0.9 22.1 +/- 2.8 17.6 +/- 4.9 13S5 16.5 +/- 2.9 21.3 +/- 2.7 20.8 +/- 0.7 15.7 +/- 1.2 13S6 16.1 +/- 0.2 18.7 +/- 0.0 18.0 +/- 0.3 17.7 +/- 1.2 14S5 16.2 +/- 0.1 10.2 +/- 1.2 18.4 +/- 0.3 14.7 +/- 2.1 15S5 15.1 +/- 0.5 16.9 +/- 0.2 17.4 +/- 1.4 12.9 +/- 1.4 16S1 21.6 +/- 0.2 21.5 +/- 4.2 22.9 +/- 0.1 22.0 +/- 2.8 16S2 17.3 +/- 2.7 17.9 +/- 0.5 21.6 +/- 0.8 18.9 +/- 0.5 See the comments at the end of this table.

C-7

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/19/2022 to 3/24/2022 3/24/2022 to 7/1/2022 7/1/2022 to 10/1/2022 10/1/2022 to 1/6/2023 LOCATION 0-1 MILE OFFSITE 6A4 12.4 +/- 2.8 16.7 +/- 0.9 17.1 +/- 1.1 14.9 +/- 0.4 8A3 15.2 +/- 2.0 14.6 +/- 2.6 15.0 +/- 0.1 13.7 +/- 2.9 15A3 9.3 +/- 3.3 11.7 +/- 0.1 12.8 +/- 1.2 10.8 +/- 1.9 16A2 10.5 +/- 1.0 11.3 +/- 1.1 12.8 +/- 1.0 9.4 +/- 0.8 1-2 MILES OFFSITE 8B2 12.9 +/- 1.6 13.5 +/- 0.5 14.9 +/- 1.4 15.1 +/- 0.3 9B1 14.2 +/- 1.1 17.2 +/- 0.5 14.3 +/- 0.3 10.4 +/- 3.0 10B3 31.0 +/- 3.2 13.3 +/- 0.5 12.8 +/- 0.1 10.0 +/- 1.6 3-4 MILES OFFSITE 1D5 15.2 +/- 0.4 13.4 +/- 1.4 17.3 +/- 0.2 17.1 +/- 0.3 8D3 10.6 +/- 1.7 13.2 +/- 0.0 14.3 +/- 0.6 14.6 +/- 0.8 9D4 13.3 +/- 1.9 13.9 +/- 0.3 16.8 +/- 0.1 16.2 +/- 1.4 10D1 13.2 +/- 0.2 15.2 +/- 0.6 15.2 +/- 0.6 15.3 +/- 1.4 12D2 20.4 +/- 2.7 17.7 +/- 0.1 18.7 +/- 1.7 18.3 +/- 0.2 14D1 12.8 +/- 0.8 14.2 +/- 2.7 15.4 +/- 2.2 13.3 +/- 1.0 4-5 MILES OFFSITE 3E1 11.0 +/- 2.1 11.9 +/- 0.1 13.4 +/- 0.0 13.1 +/- 3.6 4E2 15.3 +/- 1.2 15.4 +/- 0.0 17.3 +/- 0.1 16.7 +/- 0.1 5E2 14.1 +/- 0.9 14.8 +/- 0.4 16.1 +/- 0.8 17.4 +/- 2.8 6E1 16.2 +/- 0.1 15.7 +/- 0.4 17.4 +/- 1.7 18.0 +/- 0.7 7E1 14.4 +/- 0.3 14.5 +/- 1.0 14.9 +/- 1.2 16.2 +/- 1.8 11E1 8.5 +/- 0.9 10.5 +/- 1.4 11.3 +/- 1.2 10.8 +/- 0.3 12E1 10.2 +/- 0.9 12.1 +/- 0.6 12.1 +/- 0.6 12.0 +/- 1.1 13E4 15.8 +/- 2.5 18.5 +/- 0.1 16.9 +/- 0.2 15.6 +/- 0.6 See the comments at the end of this table.

C-8

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/19/2022 to 3/24/2022 3/24/2022 to 7/1/2022 7/1/2022 to 10/1/2022 10/1/2022 to 1/6/2023 LOCATION 5-10 MILES OFFSITE 2F1 13.8 +/- 2.8 12.7 +/- 0.9 16.6 +/- 1.4 15.3 +/- 2.3 15F1 13.3 +/- 2.9 16.6 +/- 0.1 16.8 +/- 0.7 13.4 +/- 0.9 16F1 14.9 +/- 0.6 17.6 +/- 1.2 19.6 +/- 2.0 12.1 +/- 3.9 10-20 MILES OFFSITE 3G4 15.7 +/- 1.4 14.6 +/- 1.6 15.9 +/- 0.6 17.9 +/- 0.3 4G1 15.0 +/- 1.0 15.3 +/- 0.6 15.9 +/- 1.7 15.5 +/- 0.9 7G1 12.3 +/- 0.1 13.0 +/- 0.6 13.4 +/- 0.2 13.3 +/- 2.3 12G1 13.3 +/- 1.3 12.5 +/- 0.9 13.0 +/- 1.4 12.6 +/- 0.8 12G4 13.4 +/- 1.7 14.8 +/- 2.3 16.3 +/- 1.2 15.7 +/- 1.4 See the comments at the end of this table.

LOCATION INDICATOR Average (5) 15.7 +/- 10.8 16.0 +/- 8.7 17.5 +/- 10.0 15.8 +/- 10.5 CONTROL Average (5) 13.9 +/- 2.8 14.0 +/- 2.5 14.9 +/- 3.2 15.0 +/- 4.2 COMMENTS (1) Individual monitor location results are normally the average of the elemental doses of four elements from the two dosimeters assigned to each monitoring location.

(2) A standard (std.) quarter (qtr.) is considered to be 91.25 days. Results obtained for monitoring periods of other durations are normalized by multiplying them by 91.25/x, where x is the actual duration in days of the period.

(3) Uncertainties for individual monitoring location results are two standard deviations of the elemental doses of four elements from the two dosimeters assigned to each monitoring location, representing the variability between the elemental doses of each of the four dosimeter elements.

(4) No measurement could be made at this location because the dosimeters were lost, stolen, or damaged. Refer to Appendix A of the Annual Radiological Environmental Operating Report for an explanation of program exceptions to REMP.

(5) Uncertainties associated with quarterly indicator and control averages are two standard deviations, representing the variability between the results of the individual monitoring locations.

C-9

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228 10G1 01/10/22

< 0.7 1235 +/- 161

< 7

< 8

< 31

< 9

< 13 02/07/22

< 0.9 1323 +/- 162

< 6

< 7

< 27

< 9

< 15 03/07/22

< 0.6 1393 +/- 223

< 8

< 9

< 32

< 11

< 14 04/11/22

< 1.0 1384 +/- 171

< 7

< 8

< 27

< 6

< 15 04/24/22

< 0.8 1195 +/- 195

< 9

< 10

< 42

< 12

< 19 05/09/22

< 0.9 1334 +/- 174

< 6

< 7

< 23

< 7

< 15 05/23/22

< 0.8 1430 +/- 132

< 4

< 6

< 17

< 6

< 10 06/06/22

< 0.6 1313 +/- 191

< 7

< 8

< 24

< 9

< 14 06/20/22

< 1.0 1249 +/- 200

< 7

< 9

< 34

< 11

< 13 07/05/22

< 0.8 1384 +/- 193

< 8

< 26

< 12

< 14 07/18/22

< 0.7 1387 +/- 218

< 6

< 9

< 29

< 11

< 15 08/01/22

< 0.6 1416 +/- 227

< 6

< 7

< 35

< 10

< 12 08/16/22

< 0.7 1254 +/- 148

< 7

< 31

< 9

< 13 08/29/22

< 0.8 1243 +/- 176

< 6

< 7

< 24

< 7

< 10 09/12/22

< 0.9 1129 +/- 182

< 7

< 8

< 27

< 7

< 14 09/26/22

< 0.8 1391 +/- 201

< 8

< 7

< 23

< 8

< 14 10/10/22

< 0.4 1374 +/- 195

< 6

< 8

< 36

< 12

< 16 10/22/22

< 0.8 1161 +/- 94

< 3

< 4

< 13

< 4

< 6 11/07/22

< 0.8 1337 +/- 181

< 7

< 6

< 23

< 9

< 13 12/05/22

< 0.6 1302 +/- 179

< 7

< 8

< 23

< 8

< 12 AVERAGE 1312 +/- 176 13E3 01/10/22

< 0.8 1262 +/- 184

< 6

< 9

< 31

< 7

< 16 02/07/22

< 0.7 1192 +/- 188

< 5

< 9

< 32

< 12

< 13 03/08/22

< 0.8 1270 +/- 183

< 7

< 9

< 33

< 6

< 15 04/11/22

< 0.6 1174 +/- 164

< 6

< 7

< 23

< 5

< 15 04/24/22

< 0.7 1113 +/- 159

< 7

< 8

< 34

< 11

< 13 05/09/22

< 0.7 1209 +/- 164

< 5

< 6

< 30

< 7

< 15 05/23/22

< 0.8 1158 +/- 91

< 3

< 4

< 13

< 5

< 6 06/06/22

< 0.5 1351 +/- 184

< 7

< 9

< 28

< 12

< 16 06/20/22

< 0.9 1355 +/- 183

< 6

< 9

< 31

< 9

< 16 07/05/22

< 0.9 1160 +/- 165

< 6

< 7

< 31

< 12

< 10 07/18/22

< 0.7 1291 +/- 160

< 7

< 8

< 27

< 11

< 13 08/01/22

< 0.6 1151 +/- 152

< 7

< 8

< 26

< 10

< 12 08/16/22

< 0.7 1269 +/- 193

< 6

< 8

< 30

< 11

< 15 08/29/22

< 0.9 1284 +/- 139

< 6

< 7

< 25

< 7

< 10 09/12/22

< 0.8 1182 +/- 151

< 7

< 8

< 25

< 9

< 12 09/26/22

< 1.0 1244 +/- 188

< 7

< 27

< 9

< 14 10/10/22

< 0.3 1355 +/- 161

< 7

< 31

< 8

< 17 10/22/22

< 0.9 1186 +/- 91

< 3

< 4

< 15

< 4

< 6 11/07/22

< 0.8 1217 +/- 160

< 7

< 29

< 8

< 14 12/05/22

< 0.7 1124 +/- 183

< 7

< 30

< 9

< 14 AVERAGE 1227 +/- 150

<----------GAMMA EMITTERS---------->

C-10

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228

<----------GAMMA EMITTERS---------->

5E2 01/10/22

< 0.8 1219 +/- 159

< 6

< 7

< 24

< 9

< 14 02/07/22

< 0.7 1339 +/- 167

< 7

< 6

< 25

< 9

< 13 03/07/22

< 0.8 1246 +/- 191

< 7

< 9

< 32

< 11

< 17 04/11/22

< 0.8 1168 +/- 150

< 6

< 7

< 25

< 11

< 11 04/24/22

< 0.6 1247 +/- 181

< 7

< 8

< 28

< 11

< 17 05/09/22

< 0.8 1145 +/- 139

< 6

< 25

< 8

< 10 05/23/22

< 0.8 1220 +/- 82

< 3

< 12

< 4

< 6 06/06/22

< 0.6 1090 +/- 200

< 6

< 24

< 8

< 13 06/20/22

< 0.9 1131 +/- 173

< 8

< 10

< 31

< 10

< 16 07/06/22

< 0.7 1187 +/- 153

< 6

< 25

< 6

< 12 07/18/22

< 0.9 1413 +/- 188

< 8

< 10

< 28

< 7

< 14 08/01/22

< 0.9 1116 +/- 158

< 6

< 9

< 32

< 11

< 13 08/16/22

< 0.7 1376 +/- 179

< 7

< 9

< 34

< 7

< 14 08/29/22

< 0.5 1240 +/- 184

< 7

< 10

< 25

< 7

< 14 09/12/22

< 0.8 1432 +/- 183

< 6

< 9

< 30

< 9

< 15 09/26/22

< 0.8 1223 +/- 125

< 4

< 5

< 18

< 5

< 9 10/10/22

< 0.6 1026 +/- 160

< 7

< 8

< 24

< 9

< 14 10/22/22

< 0.9 1249 +/- 79

< 3

< 14

< 4

< 7.4 11/07/22

< 0.7 1162 +/- 174

< 7

< 29

< 8

< 13 12/05/22

< 0.8 1188 +/- 151

< 5

< 6

< 22

< 7

< 11 AVERAGE 1221 +/- 210 C-11

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 2S8 01/28/22

< 377

< 119

< 6

< 17

< 6

< 11

< 7

< 10

< 8

< 6

< 25

< 8

< 10 05/05/22

< 368

< 114

< 6

< 7

< 19

< 8

< 14

< 5

< 13

< 8

< 6

< 5

< 25

< 7

< 13 07/21/22

< 345

< 105

< 5

< 6

< 14

< 8

< 10

< 5

< 8

< 6

< 5

< 22

< 8

< 11 10/09/22

< 372

< 44

< 2

< 3

< 7

< 3

< 6

< 3

< 5

< 4

< 2

< 3

< 11

< 4

< 5 AVERAGE 13S7 02/02/22

< 384

< 145

< 5

< 6

< 16

< 6

< 16

< 6

< 8

< 11

< 7

< 8

< 30

< 10

< 11 05/03/22

< 361

< 110

< 6

< 5

< 13

< 5

< 15

< 6

< 12

< 10

< 6

< 31

< 12

< 12 07/19/22

< 332

< 120

< 8

< 24

< 8

< 19

< 8

< 16

< 13

< 7

< 9

< 39

< 14

< 16 10/11/22

< 374

< 147

< 7

< 6

< 23

< 9

< 13

< 6

< 12

< 10

< 5

< 7

< 35

< 12

< 13 AVERAGE 1S3 02/02/22

< 380

< 116

< 6

< 7

< 17

< 6

< 13

< 8

< 12

< 11

< 4

< 6

< 29

< 11

< 12 05/03/22

< 368

< 126

< 6

< 5

< 16

< 6

< 15

< 7

< 10

< 7

< 6

< 28

< 10

< 13 07/19/22

< 330

< 96

< 6

< 4

< 15

< 8

< 13

< 5

< 10

< 7

< 6

< 7

< 27

< 6

< 10 10/11/22

< 365

< 126

< 7

< 5

< 17

< 7

< 14

< 7

< 15

< 9

< 6

< 7

< 25

< 13

< 10 AVERAGE 4S8 02/02/22

< 385

< 115

< 7

< 22

< 7

< 17

< 9

< 8

< 13

< 7

< 35

< 10

< 12 05/03/22

< 366

< 108

< 7

< 19

< 6

< 12

< 8

< 12

< 11

< 7

< 32

< 14

< 12 07/19/22 370 +/- 245

< 128

< 7

< 22

< 10

< 14

< 7

< 10

< 7

< 5

< 6

< 26

< 7

< 14 10/11/22

< 368

< 143

< 8

< 7

< 15

< 8

< 13

< 9

< 11

< 12

< 7

< 9

< 27

< 13

< 15 AVERAGE 370 +/- 0 4S9 02/07/22

< 362

< 112

< 6

< 5

< 19

< 6

< 14

< 5

< 9

< 8

< 6

< 7

< 27

< 8

< 13 05/05/22

< 374

< 110

< 7

< 9

< 19

< 7

< 13

< 8

< 11

< 6

< 7

< 36

< 8

< 11 07/21/22

< 351

< 124

< 5

< 21

< 8

< 11

< 7

< 9

< 7

< 6

< 27

< 12

< 12 10/09/22

< 376

< 43

< 2

< 6

< 2

< 5

< 2

< 4

< 3

< 2

< 10

< 3

< 5 AVERAGE 6S11A 01/31/22

< 377

< 165

< 9

< 8

< 25

< 11

< 17

< 9

< 16

< 12

< 9

< 36

< 12

< 16 05/09/22

< 364

< 110

< 7

< 5

< 15

< 4

< 11

< 6

< 11

< 6

< 7

< 23

< 8

< 11 07/19/22

< 343

< 128

< 7

< 6

< 18

< 8

< 11

< 7

< 10

< 9

< 6

< 7

< 29

< 7

< 11 10/11/22

< 381

< 133

< 5

< 6

< 23

< 8

< 15

< 8

< 14

< 9

< 6

< 7

< 29

< 10

< 12 AVERAGE

<----------GAMMA EMITTERS---------->

K-40 SUSQUEHANNA STEAM ELECTRIC STATION, 2022 C-12

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER Results in pCi/Liter +/- 2 sigma COLLECTION SITE DATE H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228

<----------GAMMA EMITTERS---------->

K-40 SUSQUEHANNA STEAM ELECTRIC STATION, 2022 6S12 01/31/22

< 375

< 98

< 6

< 17

< 7

< 14

< 7

< 12

< 7

< 6

< 25

< 8

< 11 05/09/22

< 365

< 99

< 7

< 16

< 7

< 15

< 8

< 14

< 8

< 7

< 5

< 23

< 9

< 13 07/20/22

< 345

< 114

< 7

< 6

< 18

< 8

< 10

< 7

< 11

< 9

< 6

< 8

< 31

< 13

< 12 10/12/22

< 387

< 176

< 7

< 8

< 19

< 10

< 13

< 9

< 15

< 11

< 7

< 8

< 37

< 9

< 16 AVERAGE 7S10 02/03/22

< 386

< 135

< 7

< 5

< 22

< 7

< 9

< 7

< 11

< 15

< 6

< 8

< 36

< 11

< 15 05/06/22

< 354

< 136

< 7

< 18

< 6

< 14

< 7

< 9

< 10

< 7

< 6

< 27

< 10

< 16 07/21/22

< 348

< 113

< 9

< 7

< 22

< 11

< 27

< 10

< 19

< 13

< 11

< 40

< 14

< 18 10/13/22

< 368

< 171

< 7

< 17

< 7

< 15

< 10

< 11

< 7

< 9

< 37

< 10

< 13 AVERAGE 7S11 02/03/22

< 380

< 124

< 5

< 15

< 7

< 14

< 7

< 11

< 7

< 31

< 12

< 13 05/06/22

< 367

< 77

< 3

< 4

< 11

< 4

< 8

< 4

< 8

< 6

< 4

< 20

< 5

< 7 07/21/22

< 335

< 97

< 4

< 5

< 13

< 5

< 11

< 6

< 11

< 7

< 6

< 7

< 19

< 10

< 12 10/13/22

< 384

< 34

< 5

< 6

< 16

< 7

< 14

< 6

< 12

< 9

< 6

< 7

< 24

< 9

< 13 AVERAGE 8S4 02/02/22

< 373

< 86

< 5

< 18

< 6

< 10

< 7

< 13

< 5

< 6

< 30

< 7

< 12 05/03/22

< 387

< 98

< 4

< 6

< 7

< 4

< 12

< 6

< 10

< 9

< 4

< 5

< 24

< 13

< 12 07/19/22

< 394

< 121

< 7

< 17

< 7

< 12

< 8

< 12

< 10

< 7

< 6

< 30

< 7

< 14 10/11/22

< 385

< 163

< 7

< 8

< 20

< 7

< 16

< 8

< 14

< 11

< 7

< 28

< 14

< 12 AVERAGE 1S4 02/02/22

< 357

< 87

< 4

< 5

< 16

< 5

< 9

< 5

< 9

< 8

< 4

< 24

< 7

< 7 05/03/22

< 364

< 121

< 7

< 6

< 17

< 8

< 12

< 5

< 12

< 8

< 6

< 9

< 28

< 11

< 13 07/19/22

< 326

< 115

< 6

< 5

< 15

< 6

< 14

< 6

< 11

< 6

< 28

< 9

< 11 10/11/22

< 377

< 131

< 7

< 6

< 16

< 7

< 11

< 7

< 13

< 11

< 7

< 6

< 34

< 7

< 14 AVERAGE C-13

TABLE C-7 ANNUAL AVERAGE TRITIUM CONCENTRATION IN PRECIPITATION, MONITORING WELLS AND LAKE TOOK-A-WHILE (LTAW) SURFACE WATER DATA SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/Liter +/- 2 sigma SITE 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Precip Sites 3S2**, 12S1**, 8G1** (offsite, controls) 62*

49 40 38 82 63 51 39 45 32 45 Precip Sites 1 and 2 (onsite, East of Station Reactor Bldgs) 370 230*

193 216 242 182 142 250 206 251 325 333 252 336 273 Precipitation Sites 3 and 4 (onsite, West of Station Reactor Bldgs) 414 404*

350 233 169 151 231 258 197 383 494 355 350 382 467 1S3 - MW-1 (43')

248 150 252 131 164 197 115 169 175 130 218 253 200 187 182 1S4 - Tap Water Sample Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled Not sampled 28 44

-17 4S8 - MW-2 (45')

292 154 190 173 137 202 187 138 154 138 191 196 239 194 282 4S9 - MW-3 (94')

127 54 150 64 80 135 94 180 125 55 109 92 77 86 102 8S4 - MW-4 (111')

172 66 105 68 81 109 60 162 145 91 102 155 96 109 181 7S10 - MW-5 (36')

171 69 96

-6 74 106 68 70 73 51 93 125 86 82 62 13S7 - MW-6 (16')

142 134 143 34 80 111 71 79 111 107 122 120 150 110 83 2S8 - MW-7 (85')

Not installed Not installed Not installed 22 54 72 70 70 74 56 37 71 63 35 86 6S11A - MW-8A (14')

177 82 165 58 15 72 103 110 63 38 50 83 72 48 30 6S11B - MW-8B (19')

Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well 6S12 - MW-9 (28')

30

-44 45 18 6

60 21 57 70 5

27 50 47 41 9

7S11 - MW-10 (132')

3

-27

-9 1

-1 23 29 55 13 1

33 16 3

7 23

- 12F3 - Groundwater Control 26

-53

-2 5

-6 45

-26 20 41 61 82

- LTAW-Surface Water 179 104 110 132 132 145 27 73 89 77 135

Revised values to reflect full scope of precipitation data.

- Stations were discontinued after 5/30/18.

C-14

TABLE C-8 GROSS BETA, TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF DRINKING WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/Liter +/- 2 sigma COLLECTION PERIOD

<----------GAMMA EMITTERS---------->

SITE START STOP Gr-B H-3 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 12H2 12/28/21 01/25/22 3.2 +/- 1.5

< 156

< 18

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 14

< 5 12H2 01/25/22 02/22/22 3.2 +/- 1.4

< 340

< 30

< 2

< 4

< 2

< 3

< 2

< 3

< 6

< 1

< 12

< 4 12H2 02/22/22 03/29/22

< 1.9

< 360

< 26

< 2

< 5

< 1

< 3

< 2

< 3

< 11

< 1

< 2

< 17

< 6 12H2 03/29/22 04/26/22

< 1.9

< 362

< 23

< 1

< 2

< 5

< 1

< 3

< 2

< 3

< 6

< 1

< 2

< 13

< 4 12H2 04/26/22 05/31/22

< 1.8

< 377

< 25

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 12

< 1

< 2

< 18

< 7 12H2 05/31/22 06/28/22 2.6 +/- 1.5

< 382

< 16

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 17

< 6 12H2 06/28/22 07/26/22 2.6 +/- 1.5

< 342

< 17

< 2

< 6

< 2

< 4

< 2

< 4

< 9

< 2

< 17

< 6 12H2 07/26/22 08/30/22 3.2 +/- 1.7

< 381

< 31

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 2

< 16

< 6 12H2 08/30/22 09/27/22 3.2 +/- 1.7

< 345

< 31

< 2

< 6

< 2

< 4

< 2

< 3

< 9

< 2

< 17

< 7 12H2 09/27/22 10/25/22

< 2.0

< 370

< 31

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 13

< 5 12H2 10/25/22 11/29/22

< 2.3

< 395

< 28

< 1

< 2

< 5

< 1

< 3

< 2

< 3

< 15

< 1

< 20

< 7 12H2 11/29/22 12/27/22 2.2 +/- 1.2

< 334

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 16

< 5 AVERAGE 2.9 +/- 0.8 C-15

TABLE C-9 GAMMA SPECTROSCOPIC ANALYSES OF FOOD PRODUCTS (FRUITS, VEGETABLES AND BROADLEAF)

SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SAMPLE SITE DATE TYPE Be-7 K-40 I-131 Cs-134 Cs-137 Ac-228 Th-228 11D1 12/02/22 Soybeans

< 256 14660 +/- 981

< 50

< 31

< 34

< 134

< 55 12/02/22 Corn

< 278 2838 +/- 629

< 37

< 25

< 23

< 146

< 58 AVERAGE 8749 +/- 16719 11S6 06/27/22 Swiss Chard 311 +/- 191 4695 +/- 613

< 24

< 17

< 23

< 112

< 45 06/27/22 Collard

< 204 3105 +/- 445

< 24

< 21

< 22

< 75

< 36 07/27/22 Swiss Chard 983 +/- 272 5352 +/- 633

< 30

< 25

< 24

< 100

< 53 07/27/22 Collard 456 +/- 178 3434 +/- 491

< 26

< 22

< 24

< 105

< 39 08/30/22 Swiss Chard

< 206 2598 +/- 346

< 19

< 14

< 64

< 33 08/30/22 Collard 561 +/- 148 4181 +/- 466

< 16

< 13

< 15

< 71

< 35 09/26/22 Swiss Chard 831 +/- 273 2624 +/- 492

< 30

< 21

< 28

< 87

< 46 09/26/22 Collard 686 +/- 184 3322 +/- 479

< 24

< 21

< 17

< 85

< 38 10/18/22 Swiss Chard 753 +/- 193 2827 +/- 435

< 20

< 15

< 17

< 66

< 34 10/18/22 Collard 739 +/- 187 3026 +/- 435

< 20

< 16

< 17

< 85

< 35 AVERAGE 665 +/- 429 3516 +/- 1858 C-16

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/Liter +/- 2 sigma COLLECTION SITE PERIOD H-3 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 Th-228 6S6 12/28/21 - 01/25/22

< 156

< 37

< 2

< 4

< 2

< 3

< 2

< 3

< 6

< 1

< 2

< 12

< 4

< 3 01/25/22 - 02/22/22

< 350

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 6

< 1

< 2

< 13

< 5

< 2 02/22/22 - 03/29/22

< 351

< 10

< 1

< 3

< 1

< 2

< 1

< 2

< 8

< 1

< 13

< 4

< 2 03/29/22 - 04/26/22

< 385

< 10

< 1

< 3

< 1

< 2

< 1

< 2

< 5

< 1

< 9

< 3

< 2 04/26/22 - 05/31/22

< 381

< 19

< 1

< 4

< 1

< 2

< 1

< 2

< 9

< 1

< 13

< 4

< 3 05/31/22 - 06/28/22

< 391

< 33

< 2

< 5

< 2

< 3

< 2

< 3

< 10

< 2

< 17

< 5

< 3 06/28/22 - 07/26/22

< 352

< 24

< 2

< 5

< 2

< 3

< 2

< 3

< 8

< 1

< 15

< 5

< 3 07/26/22 - 08/30/22

< 387

< 24

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 16

< 6

< 3 08/30/22 - 09/27/22

< 394

< 13

< 2

< 6

< 2

< 4

< 2

< 3

< 9

< 1

< 2

< 16

< 6

< 3 09/27/22 - 10/25/22

< 326

< 30

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 14

< 5

< 3 10/25/22 - 11/29/22

< 396

< 13

< 2

< 7

< 2

< 3

< 2

< 3

< 12

< 1

< 17

< 7

< 2 11/30/22 - 12/27/22

< 343

< 14

< 1

< 2

< 5

< 2

< 3

< 2

< 3

< 9

< 1

< 2

< 16

< 6

< 3 AVERAGE 6S5 01/04/22 - 01/25/22

< 148

< 43

< 2

< 8

< 2

< 5

< 3

< 5

< 7

< 2

< 3

< 18

< 6

< 4 01/31/22 - 02/22/22

< 353

< 27

< 2

< 5

< 2

< 3

< 2

< 3

< 5

< 1

< 2

< 11

< 4

< 3 03/01/22 - 03/29/22

< 339

< 32

< 2

< 6

< 2

< 3

< 2

< 3

< 8

< 1

< 2

< 16

< 6

< 3 04/05/22 - 04/26/22

< 370

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 5

< 1

< 2

< 11

< 4

< 3 05/02/22 - 05/31/22

< 353

< 17

< 2

< 7

< 2

< 4

< 2

< 4

< 11

< 2

< 20

< 7

< 3 06/07/22 - 06/28/22

< 382

< 27

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 14

< 5

< 3 07/05/22 - 07/26/22

< 351

< 34

< 2

< 5

< 2

< 3

< 2

< 3

< 8

< 2

< 15

< 5

< 3 08/02/22 - 08/30/22

< 391

< 33

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 13

< 5

< 3 09/06/22 - 09/27/22

< 343

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 1

< 2

< 13

< 5

< 3 10/04/22 - 10/25/22

< 320

< 15

< 2

< 5

< 2

< 3

< 2

< 3

< 7

< 2

< 14

< 5

< 3 11/01/22 - 11/29/22

< 390

< 17

< 2

< 6

< 2

< 3

< 2

< 3

< 10

< 1

< 2

< 16

< 6

< 3 12/06/22 - 12/27/22

< 340

< 20

< 2

< 6

< 2

< 4

< 2

< 4

< 9

< 2

< 17

< 6

< 3 AVERAGE

<----------GAMMA EMITTERS---------->

C-17

TABLE C-11 GAMMA SPECTROSCOPIC ANALYSIS OF FISH SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 2H Channel catfish 05/12/22 3811 +/- 766

< 49

< 46

< 148

< 41

< 87

< 48

< 41 Quillback 05/12/22 3061 +/- 858

< 47

< 59

< 126

< 51

< 111

< 44

< 51 Smallmouth Bass 05/12/22 2788 +/- 863

< 52

< 39

< 71

< 47

< 85

< 48

< 39 Walleye 10/07/22 3635 +/- 1276

< 86

< 69

< 179

< 77

< 209

< 76

< 88 Smallmouth Bass 10/07/22 4030 +/- 1048

< 70

< 73

< 218

< 90

< 153

< 63

< 75 Quillback 10/07/22 3526 +/- 1360

< 80

< 77

< 143

< 67

< 169

< 64

< 87 AVERAGE 3475 +/- 935 IND Channel catfish 05/11/22 3398 +/- 870

< 45

< 42

< 129

< 44

< 112

< 41

< 47 Quillback 05/11/22 2342 +/- 920

< 56

< 50

< 177

< 51

< 110

< 60

< 49 Smallmouth Bass 05/11/22 3517 +/- 1102

< 39

< 50

< 164

< 52

< 101

< 47

< 47 Walleye 10/06/22 4627 +/- 1252

< 96

< 193

< 82

< 174

< 83

< 79 Smallmouth Bass 10/06/22 3432 +/- 1034

< 81

< 80

< 132

< 76

< 117

< 71

< 67 Quillback 10/06/22 3439 +/- 1030

< 39

< 58

< 164

< 80

< 146

< 59

< 62 AVERAGE 3459 +/- 1448 LTAW Largemouth Bass 12/05/22 4929 +/- 1208

< 65

< 54

< 159

< 77

< 116

< 55

< 64 Brown Trout 12/05/22 2514 +/- 1147

< 77

< 86

< 181

< 86

< 139

< 75

< 87 AVERAGE 3722 +/- 3415 C-18

TABLE C-12 GAMMA SPECTROSCOPIC ANALYSES OF SHORELINE SEDIMENT SUSQUEHANNA STEAM ELECTRIC STATION, 2022 Results in pCi/kg (dry) +/- 2 sigma COLLECTION SITE DATE K-40 Cs-134 Ac-228 Th-228 2B 03/31/22 11500 +/- 1217

< 65

< 66

< 1650 800 +/- 318 1157 +/- 179 09/19/22 10160 +/- 1708

< 85

< 100

< 1995 1043 +/- 305 614 +/- 173 AVERAGE 10830 +/- 1895 921 +/- 344 886 +/- 767 7B 03/31/22 8246 +/- 1096

< 51

< 62

< 1310 716 +/- 225 671 +/- 113 09/19/22 12270 +/- 1696

< 58

< 80

< 1351 1055 +/- 383 1014 +/- 122 AVERAGE 10258 +/- 5691 886 +/- 479 842 +/- 486 12F 03/31/22 8987 +/- 1194

< 41

< 67 3465 +/- 1191 880 +/- 289 817 +/- 90 09/19/22 15330 +/- 2719

< 133

< 158

< 3363 1567 +/- 484 885 +/- 275 AVERAGE 12159 +/- 8970 3465 +/- 0 1223 +/- 972 851 +/- 96 Cs-137 Ra-226 C-19

0 50 100 150 200 250 300 350 400 450 500 FIGURE C GROSS BETA ACTIVITY IN AIR PARTICULATES Indicator Control PRE-OP OPERATIONAL A

E B

C D

F Unit 2 Criticality 05/08/1984 CHERNOBYL 4/26/86 CHINESE WEAPONS TEST A - 06/17/74 B - 09/26/76 C - 11/17/76 D - 09/17/77 E - 03/14/78 F - 10/15/80 Unit 1 Criticality 09/10/1982 E-3 pCi/m3 C-20 1974 --t-----::::=:!iiliiiiiiiii=~~;;;;;;;;;;;;~

_____j__--------'---7 1975 1976 1977 1978 1979 1980

+--

1981 1--::::::::==------------,

1982 c:;::

1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 I '!_ ______________

~

2023 c

0 5

10 15 20 25 30 35 40 45 50 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 2021 2023 Dose Rate (mrem/STD Qtr)

FIGURE C AMBIENT RADIATION LEVELS BASED ON ENVIRONMENTAL DOSIMETRY DATA Indicator Control PRE-OP OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 Changed from TLD to OSLD system 01/18/12 C-21 I

\\

0 10 20 30 40 50 60 70 80 90 100 pCi/L FIGURE C IODINE-131 ACTIVITY IN MILK Indicator Control PRE-OP OPERATIONAL A

B C

CHERNOBYL 4/26/86 Unit 2 Criticality 05/08/1984 CHINESE WEAPONS TEST A - 09/12/77 B - 03/14/78 C - 10/15/80 Unit 1 Criticality 09/10/1982 C-22 I

~

\\

~

l

~

FIGURE C ANNUAL AVERAGE TRITIUM ACTIVITY IN PRECIPITATION AND SURFACE WATER VERSUS GROUND WATER

-100 0

100 200 300 400 500 600 700 800 900 1000 1100 1200 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Investigation Level MDC Condition Report Threshold (surface/groundwater sample result)

Minimum Detectable Concentration pCi/L C-23

-~<>

.$ #~ #~ #:, #'~ #!', #'"' #~

~~

~ #~

~~

~

"'~

-~~

~

V

~~ 1~

I

0 1

2 3

4 5

6 7

8 9

10 pCi/L FIGURE C GROSS BETA ACTIVITY IN DRINKING WATER PRE-OP OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 C-24

-500 500 1500 2500 3500 pCi/L FIGURE C TRITIUM ACTIVITY IN SURFACE WATER Indicator Control PRE-OP OPERATIONAL Unit 2 Criticality 05/08/1984 Unit 1 Criticality 09/10/1982 C-25

APPENDIX D

SUMMARY

OF RESULTS FROM ANALYTICS, ENVIRONMENTAL RESOURCE ASSOCIATES (ERA),

AND DEPARTMENT OF ENERGY (DOE) - MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

D-1

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (b)

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 Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 4)

D-2

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Ratio of TBE to Analytics Result Evaluation (b)

Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services 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 (Page 2 of 4)

D-3

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Acceptance Range Evaluation (b)

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-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(4) 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 22-22 Table D-2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services (Page 3 of 4)

D-4

Month/Year Identification Number Matrix Nuclide Units TBE Reported Value Known Value (a)

Acceptance Limits Evaluation (b)

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

U-238 pCi/kg 1658 3320 1820 - 4460 N(2)

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

U-Nat pCi/L 10.54 8.53 6.60 - 9.88 N(3)

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 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 4 of 4)

D-5

APPENDIX E REMP SAMPLE EQUIPMENT OPERABILITY TRENDING E-1

SAMPLING MEDIA SAMPLE LOCATION DESCRIPTION 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Air Particulate 3S2 SSES Backup Met. Tower 99.9 100 99 100 99.9 99.9 100.0 99.4 99.9 95.5

& Charcoal 12S1 West Building 99.9 100 100 100 99.1 99.7 99.9 99.9 99.9 99.7 13S6 Former Laydown Area, West of Confers Lane 99.9 100 97 100 100 99.9 99.9 99.9 99.9 99.9 12E1 Berwick Hospital 100.0 100 98 99.1 100 100 100 100.0 100 100 6G1 Freeland Substation 99.9 100 90*

100 100 100 No longer in service No longer in service No longer in service No longer in service 8G1 PPL System Facilities Center, Humboldt Industrial Park 99.9 100 100 99.2 99.9 99.9 99.9 99.9 99.9 100 10S3 E of Confers Lane, S of Towers Club 100 99.5 99.9 99.2 98.9 99.9 99.7 9B1 Transmission Line, E of Route 11 100 99.9 99.9 99.9 100.0 99.9 99.9 Drinking Water 12H2 Danville Water Company 100.0 100 100 100 100 100 98.1 100.0 100 100.0 Surface Water 2S7 Cooling Tower Blowdown Discharge Line 98.1 69**

100 99.1 100 100 99.9 99.9 93.0 No longer in service 6S6 River Water Intake Line 93.2 93 98 99.7 99.9 99.9 99.9 88.1***

94.0 99.4

Planned power outage by Electric Utilities

- Auto-Compsite sampler problems, March through June. New Auto-Compsite sampler installed in July.

- - Auto-Compsite sampler taken OOS 8/30/20. New Auto-Compsite sampler installed, placed in service 10/13/20.

TABLE E-1 REMP SAMPLING EQUIPMENT OPERABILITY TRENDING SUSQUEHANNA STEAM ELECTRIC STATION Percent (%) Operability E-2

PLA-8058, Annual Radiological Environmental Operating Report (PLA-8058)

Contents

Text

Attachment:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

PLA-8058, Annual Radiological Environmental Operating Report (PLA-8058)

Text

Attachment:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

Search