ML19129A130

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Independent Spent Fuel Storage Installation - Annual Radiological Environmental Operating Report 1 January Through 31 December 2018
ML19129A130
Person / Time
Site: Zion, 07201031  File:ZionSolutions icon.png
Issue date: 05/06/2019
From:
Teledyne Brown Engineering Environmental Services, ZionSolutions
To:
Office of Nuclear Material Safety and Safeguards
References
ZS-2019-0037
Download: ML19129A130 (66)
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Text

Docket No: 50-295 50-304 72-1037 ZION NUCLEAR POWER STATION Annual Radiological Environmental Operating Report 1 January through 31 December 2018 Prepared By Teledyne Brown Engineering Environmental Services

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An EncrgySoluiions ~ 1 Zion Nuclear Power Station Zion, IL 60099 May 2019 2018 Zion AREOR

Intentionally left blank 2018 Zion AREOR

Tat;>le Of Contents I. Summary _and Conclusions ............................................................................................... 1 II. Introduction ...................................................................................................................... 2 A. Objectives of the REMP ....................................................................................... 2 B. Implementation of the Objectives ......................................................................... 2 Ill. Program Description ....................................................................................................... 3 A. Sample Collection .................................. ,............................................................. 3 B. Sample Analysis .................................................................................................. 4 C. Data Interpretation ............................................................................................... 5 D. Program Exceptions ............................................................................................ 6 E. Program Changes ............................................................................................... 7 IV. Results and Discussion .................................................................................................. 7

. A. Aquatic Environment ........................................................................................... 7

1. Public Water ............................................................................................... 7
2. Fish ........................................................................................................... 8
3. Sediment .................................................................................................... 8 B. Atmospheric Environment ................................................................................... 8
1. Airborne - Air Particulates ......................................................................... 8 C. Terrestrial Environment ....................................................................................... 9
1. Food *Product ............................................................................................ 9 D. Ambient Gamma.Radiation ................................................................................. 9 E. Land Use Survey ...................................................................................:........... 10 F. Errata Data ......................................................................................................... 11 G. Summary of Results - Inter-laboratory Comparison Program .......................... 12

Appendices Appendix A Radiological Environmental Monitoring Report (REMP) Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Zion Nuclear Power Station, 2018 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2018 Table B-2 Radiological Environmental Monitoring Prc;,gram - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2018 Figures Figure B-1 Inner Ring TLD and Fixed Air Sampler Locations of the Zion Nuclear Power Station, 2018 Figure B-2 Outer Ring TLD and Fixed Air Sampler Locations of the Zion Nuclear Power Station, 2018 Figure B-3 Fish, Water and Sediment Sampling Locations of the Zion Nuclear Power Station, 2018 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-1.2 Concentrations of Tritium in Public-Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-1.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-11.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C:-111.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 ii 2018 Zion AREOR

Table C-IV.1 Concentrations of Gross Beta in Air-Parffculate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-IV.2 Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-IV.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-V.1 Concentration of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Table C-Vl.1 Quarterly TLD Results for Zion Nuclear Power Station, 2018 Table C-Vl.2 Mean Quarterly TLD Results for the Inner Ring, ISFSI Inner Ring, Outer Ring, Other and Control Locations for Zion Nuclear Power Station, 2018 Table C-Vl.3 Summary of the Ambient Dosimetry Program for Zion Nuclear Power Station, 2018 Figures Figure C-1 Public Water - Gross Beta - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-2 Public Water- Gross Beta- Stations Z-16 and Z-18 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-3 Public Water- Tritium - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-4 Public Water- Tritium - Stations Z-16 and Z-18 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-5 Air Particulates - Gross Beta - Stations Z-01 and Z-02 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-6 Air Particulate - Gross Beta - Stations Z-03 and Z-13 Collected in the Vicinity of ZNPS, 2000 - 2018 Figure C-7 Mean Quarterly TLD Gamma Dose ZNPS, Inside Controlled Area:

Potentially ISFSI Impacted 2013-2018 Figure C-8 Mean Quarterly TLD Gamma Dose ZNPS, Controlled Area Boundary 2013-2018 Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2018 iii 2018 Zion AREOR

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

Teledyne Brown Engineering, 2018 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2018 Appendix E Annual Radiological Groundwater Protection Program Report (ARGPPR)

Appendix F Errata Data iv 2018 Zion AREOR

I. Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Zion Nuclear Power Station (ZNPS) by ZionSolutions (ZS) covers the period 1 January 2018 through 31 December 2018. During that time period, 574 analyses were performed on 525 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of ZNPS had no adverse radiological impact on the environment.

Public water samples were analyzed for concentrations of gross beta, tritium and gamma-emitting nuclides. No fission or activation products were detected.

Gross beta activities detected were consistent with those detected in previous years, and with levels of natural radioactivity typically observed in the environment.

Food product samples/vegetation were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected.

Fish (commercially and recreationally important species) and sediment samples were analyzed for concentrations of gamma-emitting nuclides. No Cesium-137 (Cs-137) activity was detected in fish or sediment samples. No plant-produced fission or activation products were found in fish or sediment.

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

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters.

The RETDAS Computer Model predicts concentrations of activation and fission products in off-site media (fish, vegetation, sediment, air and water) based on measured concentrations of sampled dust and permitted water discharges leaving the site. The results of these computer model predictions in 2018 indicated the projected concentrations in fish, sediment, vegetation, air and water were well below levels that can be measured with state of the art laboratory analysis.

This is why the concentrations off site and the resulting dose impact are calculated by computer. The levels are predicted to be too low to measure off site, as demonstrated by the results of environmental sampling summarized in this report.

Lastly, in Appendix E is the annual groundwater report summarizing the results of groundwater samples collected on site quarterly. In 2018, tritium was

,identified in groundwater for the first time since the station's 10CFR50 licenses were transferred from Exelon to Zion Solutions on September 1, 2010. Levels just above MDA were identified in well 08S for approximately six months, and then dropped below MDA, and have remained below MDA since then. This is reviewed and discussed in Appendix E.

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II. Introduction The Zion Nuclear Power Station (ZNPS), consisted of two 1,100 MWt pressurized water reactors, was owned and operated by Exelon Corporation, and is located in Zion, Illinois adjacent to Lake Michigan. Unit No. 1 went critical in December 1973. Unit No. 2 went critical in September 1974. The plant permanently ceased operation in January of 1998 and has been permanently defueled. The plant is in the final stages of decommissioning and' the remaining sources of radioactive material on site include spent fuel stored in canisters on the Independent Spent Fuel Storage Installation (ISFSI),

demolished building materials awaiting shipment to the low level waste and disposal facility in Utah, and trace amounts of radioactive material in backfilled structures and surface soil per the Station's License Termination Plan (LTP).

The site is located in northeast Illinois on the western shore of Lake Michigan, approximately 50 miles north of Chicago, Illinois.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Mirian Technologies on samples collected during the period 1 January 2018 through 31 December 2018.

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

1. Provide data on measurable levels of radiation and radioactive materials in the site environs
2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure
3. Validate the effluent computer model that predicts radioactive material concentrations at populated off-site sample locations.

B. Implementation of the Objectives The implementation of the objectives is accomplished by:

1. Identifying significant exposure pathways
2. Establishing baseline radiological data of media within those pathways
3. Continuously monitoring those media before, during and after Station operation to assess Station radiological impacts (if any) on man and the environment

Ill. Program Description A. Sample Collection Samples for the ZNPS REMP were collected for Zion Solutions (ZS) by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the ZNPS REMP in 2018. Sample locations and descriptions can be found in Table B-1 and Figures B-1 and B-2, Appendix B. The sampling methods used by Environmental Inc.

(Midwest Labs) are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of public water, fish and sediment. Two gallon water samples were collected monthly from four public water locations (Z-14, Z-15, Z-16 and Z-18). Control locations were Z-14 and Z-18. All samples were collected in new unused plastic bottles, which were rinsed at least twice with source water prior to collection. Fish samples comprised of the edible flesh portion of white sucker, largemouth bass, common carp, brown trout, lake trout and burbot were collected semiannually at two locations, Z-26 and Z-27. Sediment samples composed of recently deposited substrate were collected at one location semiannually, Z-25.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulates. Airborne particulate samples were collected and analyzed weekly at four locations (Z-01, Z-02, Z-03, and Z-13). The control location was Z-13. Airborne particulate samples were obtained at each location, using a vacuum pump with glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The filters were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on food product samples. Food products were collected annually in August at three locations (Z-Control, Z-Quad 3 and Z-Quad 4). The control location was Z-Control. Various types of samples were collected and placed in new unused plastic bags and sent to the laboratory for analysis.

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Ambient Gamma Radiation Direct radiation measurements were made with Panasonic Environmental TLD type 814 with 3 CaS04 elements. Each location consisted of 2 TLD sets. The TLD locations were placed on, around and surrounding the ZNPS site at the following locations:

Inner Ring: Z-01, Z-02, Z-03, Z-101, Z-102, Z-103, Z-104, Z-105, Z-106, Z-107, Z-108, Z-109, Z-121, Z-124, Z-125, Z-129, Z-130, Z-131 Special Interest: Z-112, Z-113, Z-114, Z-115 Outer Ring: Z-209, Z-211, Z-212, Z-213, Z-214, Z-215, Z-216 Control: Z-13 The specific TLD locations were determined by the following criteria:

1. The presence of relatively dense population;
2. Site meteorological data taking into account distance and elevation for each of the sixteen-22 1/2 degree sectors around the site, where estimated annual dose from ZNPS, if any, would be most significant; 3: On hills free from local obstructions and within clear line of sight to construction activities (where practical) and the ISFSI;
4. And near the closest dwelling to the demolition activities in the prevailing downwind direction and the ISFSI.

(Two TLDs - each comprised of three CaS04 elements enclosed in plastic - were placed at each location approximately four to eight feet above ground level. The TLDs were exchanged quarterly and sent to Mirion Technologies for analysis.

B. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the ZNPS REMP in 2018. The analytical procedures used by the laboratories are listed in Table B-2.

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

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1. Concentrations of beta emitters in public water and air particulates using gross beta analysis with proportional detectors.
2. Concentrations of gamma emitters in public water,- air particulates, vegetation, fish, and sediment using high purity germanium (HPGe) gamma spectroscopy.

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3. Concentrations of tritium in public water using liquid scintillation

, analysis (LSC) with the energy window focused on the tritium

. emission energy.

4. _Ambient gamma radiation levels at various locations on and off
  • site up to 1O miles away using multi-chip thermoluminescent dosimeters {TLDs).

C. Data Interpretation The radiological and direct radiation data collected prior to Zion Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Zion Nuclear Power Station was considered operational at initial criticality. In addition, data was compared to previous years' operational data for consistency and trending. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration
  • The l9wer limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity. All analyses were designed to achieve the required ZNP.S detection capabilities for environmental sample analysis.

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

2. Net Activity Calculation and Reporting of Results Net activity for a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the 5

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environment, background variations may result in sample activity being lower than the background activity affecting a negative number. An MDC was reported in all cases where positive activity was not detected.

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

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

Means and standard deviations of the results were calculated.

The standard deviations represent the variability of measured results for different samples rather than single analysis

  • uncertainty.

D. Program Exceptions For 2018 the ZNPS REMP had a sample recovery rate in excess of 98%. Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date Public water collected from Lake. Primary PW Z-18 01/24/18 and back up location OOS due to demo.

No apparent reason for low reading; pump AP. Z-03 03/07/18 operating normally Z-01 & Z-02 found on ground - reposted in TLD Z-01, Z-02 03/21/18 a new bag and double-clipped Air pump 264 found non-functional. Run AP Z-13 04/05/18 time unknown. Pump changed out.

Primary collection point non-functional.

PW Z-18 10/03/18 Collected sample from back-up location.

Collection of sediments attempted at Z-25.

Bad weather & choppy surf prevented ss Z-25 10/04/18 collection. Sample collected on 10/24/18 from Z-26 as Z-25 conditions still prevented sample collection.

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Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date TLD Z-129-2 fell off fence and was run over by mower. Unable to read. Co-located TLD 129-2 05/02/18 TLD Z-129-1 was read and value used for this location.

No sample - collector could not gain WO Z-15 07/05/18 entrance to water plant All three TLD chips provided error codes TLD Z-124-1 10/1/18 when read. No result obtained.

TLD 101-1 was lost en route to Mirian and TLD Z-103-1 12/26/18 not read. Co-located TLD Z-103-2 was read and its value used for this location.

Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns and power outages were unavoidable. The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

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E. Program Changes There were no program changes for 2018.

IV. Results and Discussion A. Aquatic Environment

1. Public Water Samples were taken weekly and composited monthly at four locations (Z-14, Z-15, Z-16 and Z-18). The following analyses were performed.

Gross Beta Samples from all locations were analyzed for concentrations of gross beta. Gross beta was detected in 30 of 48 samples. The values ranged from 1.8 pCi/1 to 4.9 pCi/1. Concentrations detected were consistent with those detected in previous years.

(Table C-1.1, Appendix C) (Figures C-1 and C-2, Appendix C) 7 2018 Zion AREOR

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). No tritium was detected and the LLD was met (Figures C-3 and C-4, Appendix C).

Gamma Spectrometry Samples from both locations were analyzed for gamma-emitting nuclides. No nuclides were detected and all required LLDs were met. (Table C-1.3, Appendix C)

2. Fish Fish samples comprised of white sucker, largemouth bass, common carp, brown trout, lake trout and burbot were collected at two locations (Z-26 and Z-27) semiannually. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma-emitting nuclides No nuclides were detected and all required LLDs were met. (Table C-11.1, Appendix C)

3. Sediment Aquatic sediment samples are normally collected at one location (Z-25) semiannually. The fall sample was collected at Z-26 due to unsafe conditions at location Z-25 in October, 2018. The following analysis was performed:

Gamma Spectrometry Sediment samples from Z-25 and Z-26 were analyzed for gamma-emitting nuclides. No nuclides were detected and all required LLDs were met. (Table C-111.1, Appendix C)

8. Atmospheric Environment
1. Airborne - Air Particulates Continuous air particulate samples were collected from four locations on a weekly basis. Three locations were within the ZNPS site boundary (Z-01, Z-02 and Z-03) and the fourth is located 10 miles north and is the control location (Z-13). The 8

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following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters. Detectable gross beta activity was observed at all locations, except one control air sample (see Table C-IV.1 ).

Comparison of results among the three groups aids in determining the effects, if any, resulting from the operation of ZNPS. The positive results from the three On-Site locations ranged from 4E-3 pCi/m 3 to 41 E-3 pCi/m 3 with a mean of 15E-3 pCi/m3.

The results from the Control location ranged from 7E-3 pCi/m 3 to 39E-3 pCi/m 3 with a mean of 16E-3 pCi/m 3 and one result <LLD.

Comparison of the 2018 air particulate data with previous year's data indicates there is no off site impact resulting from demolition activities at ZNPS. Concentrations detected were consistent with those detected in previous years. (Table C-IV.1 and C-IV.2, Appendix C)

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma-:emitting nuclides. No plant-related nuclides were detected and all required LLDs were met. Naturally occurring Be-7 was detected; the source of this is described later in this report.

(Table C-IV.3, Appendix C)

C. Terrestrial Environment

1. Food Product Food product samples were collected at three locations (Z-Control, Z-Quad 3 and Z-Quad 4) when available. The following analysis was performed:

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

D. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Panasonic Environmental Type 814 CaSQ4 thermoluminescent 9

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dosimeters (TLD's). Sixty-four TLDs were mounted at 30 locations around the site. Results of TLD measurements are listed in Tables C-Vl.1 to C-Vl.3, Appendix C .

. Most TLD measurements were below 25 mR/quarter, with a range of 13 mR/quarter to 32 mR/quarter. As there are duplicate TLDs posted at each location, the highest value is always reported in Appendix C for each location. The 13 mR/quarter reading was from the first quarter at location Z-101-1, but the higher value of 14 mR/quarterwas reported (Z-101-2) in Appendix C.

When direct dose in 2018 is compared to direct dose the previous five years (2013-2018) at the four compass points surrounding decommissioning activities (Figure C-8) within the site boundary, there is a visible drop in direct dose. This is attributed to a steady reduction in source term over the same period, including demolition of structures inside the former protected area, and shipment by rail and truck of the debris to Energy Solutions low level waste facilities in Utah.

When looking at a more specific set of TLD's, those most likely to be impacted by direct radiation from the Independent Spent Fuel.

Storage Installation (ISFSI) by close proximity and line of site positioning inside the site boundary (Figure C-7), a significant increase in direct dose is evident in 2015 following completion of the transfer of spent fuel to the ISFSI. After 2015, a drop in direct dose is evident due in part to site source term reduction, and to a lesser extent, decay of the spent fuel.

E. Land Use Survey A Land Use Census conducted during October 2018 around the Zion Nuclear Power Station (ZNPS) was performed by Zion Station Personnel for ZS to comply with Chapter 3 of the Zion Offsite Dose Calculation Manual. The purpose of the survey was .

to document the nearest resident, milk producing animal and garden of greater than 500 ft2 in each of the sixteen 22 % degree sectors around the site. The results of this survey are summarized below:

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Distance in Miles from ZS Sector Residence Garden Milk Farm Miles Miles Miles N 2.5 3.4 >10 NNE NE ENE E

ESE SE SSE s

SSW 1.9 >10 >10 SW 1.1 4.8 >10 WSW 1.0 3.0 >10 w 1.1 2.9 >10 WNW .1.0 2.7 >10 NW 1.0 3.2 >10 NNW 1.3 3.5 >10 Source: Ill. Department of Agriculture and USGS recommended using google maps to locate garden areas due to gardens and milk animals are voluntary declarations, also aerial photographs on ARCGIS layers updated by government sources are 5-10 years old.

  • Gardens are located using Google Maps to narrow down areas that appeared to have been ploughed by aerial photographs, then visually verified by visiting these new locations.

Milk-producing animal located by internet search for dairies advertising the sale of milk for public consumption.

F. Errata Data Minor.errors were identified in the 2016 and 2017 AREORs.

Corrections were made and the corrected pages with change bars are included in Appendix F.

In the 2016 AREOR, there were inconsistencies identified between Tables C-Vl.1 through C-Vl.3 in the data used to summarize TLD results and standard. deviations reported by quarter and category. This was due to manual transcription and rounding errors. To alleviate these error sources, a verified and validated MS Excel workbook was created that permitted copying and pasting the raw TLD data supplied in a spreadsheet directly from Mirion into a worksheet. The workbook then calculated all averages, standard deviations, minimums and maximums reported from 254 analyses and populated all results in required 11 2018 Zion AREOR

tabulated format for Appendix C with no transcription or rounding errors.

As Teledyne creates the same tabulated data, it provides independent verification of the results.

In the 2017 AREOR, Figures C-7 and C-8 reported mrem per year between 2013 and 2017but it was actually average quarterly dose per year and the y-axis labels were corrected.

G. 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:

A. Analytics Evaluation Criteria Analytics' evaluation report provides a ratio *of TBE's result and Analytics' known value. Since flag values are not assigned by Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.

B. ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's 1 acceptance limits are established per the USEPA, National Environmental Laboratory Accreditation Conference (NELAC),

state-specific Performance Testing (PT) program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

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

  • Acceptable (flag = "A") - result within +/- 20% of the reference value
  • Acceptable with Warning (flag = "W") - result falls in the +/- 20%

to +/- 30% of the reference value

  • Not Acceptable (flag = "N") - bias is greater than 30% of the reference value 12 2018 Zion AREOR

/

Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

For the TSE laboratory, 166 out of 172 analyses performed met the specified acceptance criteria. Five analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TSE Corrective Action Program.

1. TSE was unable to report the February 2018 DOE MAPEP vegetation Sr-90 result due to QC failure and limited sample amount. (NCR 18-09)
2. The Analytics September 2018 milk Fe-59 result was evaluated as Not Acceptable (Ratio of TSE to known result at 132%). The reported value was 158 +/- 17.6 pCi/L and the known value was 119 +/- 19.9 pCi/L. No cause for the failure could be determined.

TSE has passed 24 of the previous 27 milk cross-check results since 2012. This sample was run in duplicate on a different detector with comparable results (162 +/- 16 pCi/L). NOTE:

TBE's 4th Qtr result passed at 105% (NCR 18-20)

3. The Analytics September milk 1-131 result was evaluated as Not Acceptable (Ratio of TSE to known result at 143%). Due to a personnel change in the gamma prep lab, the sample was not prepped/counted in a timely manner such as to accommodate the 1-131 8-day half-life. Analysts have been made aware of the urgency

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for this analysis and it will be monitored more closely by QA. NOTE: TBE's 4h Qtr result passed at 101% (NCR 18-24) .

4. The Analytics September soil Cr-51 result was evaluated as Not Acceptable (Ratio of TSE to known result at 131 %). As with #3 above, the sample was not prepped/counted in a timely manner such as to accommodate the Cr-51 27-day half-life. The same corrective action applies here as in #3. (NCR 18-21)
5. The MAPEP November vegetation Sr-90 result of 0.338 Sq/sample was evaluated as Not Acceptable (Lower acceptable range was 0.554 Sq/sample). It appears that there has been incomplete dissolution of Sr-90 due to the composition of the MAPEP vegetation "matrix". To resolve this issue, the TSE-2018 procedure has been modified to add H202 to assist in breaking down the organic material that comprises this "matrix". This corrective action will be monitored closely by QA. (NCR 18-25).
6. The ERA October 2017 water Sr-90 sample was evaluated as 13 2018 Zion AREOR

Not Acceptable. TBE's initial reported result of 36.8 pCi/L exceeded the upper acceptance range (22.9 - 36.4 pCi/L). After reviewing the data for this sample, it was discovered that there was a typographical error at the time the results were entered at the ERA website. The correct result in LIMS of 36.2 should have been submitted instead. This result is within ERA's acceptance limits. In addition to the typo error, ERA's very stringent upper acceptance limit of 116% is not a reflection of TBE's ability to successfully perform this analysis. (NCR 18-23)

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

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APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

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TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2018 Name of Facility: ZION NUCLEAR POWER STATION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION,IL REPORTING PERIOD: 2018 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M) NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (Ml MEAN (Ml MEAN(M) STATION# NON ROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (~ (~ (~ NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS PUBLIC WATER GR-8 48 4 2.6 2.9 3.3 Z-14 CONTROL 0 (PCI/LITER) (15/24) (15/24) (7/12) KENOSHA WATER WORKS 1.8 -3.6 2 -4.9 2 -4.9 10.0 MILES N OF SITE H-3 16 200 <LLD <LLD 0 GAMMA 48 MN-54. 15 <LLD <LLD 0 C0-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 l> 0

~

I C0-60 15 <LLD <LLD ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0 ZR-95 15 <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 FISH GAMMA 8 (PCI/KG WET) MN-54 130 <LLD NA 0 C0-58 130 <LLD NA 0 i=E-59 260 <LLD NA 0 C0-60 130 <LLD NA 0 ZN-65 260 <LLD NA 0 I\.)

NB-95 NA <LLD NA 0 0

~ ZR-95 NA <LLD NA 0 co N CS-134 100 <LLD NA 0 5" CS-137 100 <LLD NA 0

)> BA-140 NA <LLD NA 0

o m LA-140 NA <LLD NA 0 0
o

/Ml Mean and ranged based upon detectable measurements only. Fraction of detectable measurements at specified loactions is indicated in parentheses (0

TABLE A-1 RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2018 Name of Facility: ZION NUCLEAR POWER STATION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: 2018

\ INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M) NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION# NONROUTINE (UNITOF ANALYSIS ANALYSIS OF DETECTION (n (n (n NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SEDIMENT GAMMA 2 (PCI/KG DRY) MN-54 NA <LLD NA D C0-58 NA <LLD NA D FE-59 NA <LLD NA D C0-60 NA <LLD NA D ZN-65 NA <LLD NA D NB-95 NA <LLD NA D ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA D

)>

I CS-137 180 <LLD NA D N

BA-140 NA <LLD NA D LA-140 NA <LLD NA D AIR PARTICULATE GR-8 208 10 15 16 17 Z-03 INDICATOR D (E-3 PC/ICU.METER) (156/156) (51/52) (52/52) ONSITE 3 4-41 7-39 7 -41 0.2 MILES NNW OF SITE GAMMA 16 MN-54 NA <LLD <LLD D C0-58 NA <LLD <LLD D FE-59 NA <LLD <LLD D C0-60 NA <LLD <LLD D ZN-65 NA <LLD <LLD 0 I\J 0 NB-95 NA <LLD <LLD 0

~

OJ ZR-95 NA <LLD <LLD 0 N

o' CS-134 10 <LLD <LLD 0 \

}> CS-137 10 <LLD <LLD 0

JJ m BA-140 NA <LLD <LLD 0 0
JJ LA-140 NA <LLD <LLD 0 (MJ Mean and ranged based upon detectable measurements only. Fraction of detectable measurements at specified /oactions is indicated in parentheses (Q

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2018 Name of Facility: ZION NUCLEAR POWER STATION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION,IL REPORTING PERIOD: 2018 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION LOCATION WITH HIGHEST ANNUAL MEAN (M) NUMBER OF LOWER LIMIT MEAN (Ml MEAN (M) MEAN(M) STATION# NON ROUTINE PATHWAY SAMPLED TYPES OF NUMBER OF (UNITOF ANALYSIS ANALYSIS OF DETECTION (D (D (D NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS VEGETATION GAMMA 6 (PCl!KGWET) MN-54 NA <LLD <LLD 0 C0-58 NA <LLD <LLD 0 FE-59 NA <LLD <LLD 0 C0-60 NA <LLD <LLD 0.

ZN-65 NA <LLD <LLD 0 NB-95 NA <LLD <LLD 0 ZR-95 NA <LLD <LLD 0 CS-134 60 <LLD <LLD 0

)> 0 I CS-137 80 <LLD <LLD GI,)

BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 DIRECT RADIATION TLD-QUARTERLY 254 NA 18.6 18.6 29.3 Z-131 INDICATOR 0 (MILLI-ROENTGENIQTR.) (230/230) (24/24) (8/8) 13-32* 15-21' 26 - 32* 0.2 MIIES WSW N

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0 /MJ Mean and ranged based upon detectable measurements only. Fraction of detectable measurements at specified loactions is indicated in parentheses (Q __

u

'Two TLDs are posted at each location for redudency. The averages are based on the highest reading at each station. The ranges are based on all results.

The total number of analyses is based on all TLD results - there are 3 chips read in each TLD, so literally, there are 762 analytses performed on 254 TLD's - the 2018 TLD results reflect 2 TLDs that were damaged/lost.

Intentionally left blank 2018 Zion AREOR

APPENDIXB LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHOD 2018 Zion AREOR

TABLE 8-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2017 Location Location Description . Distance & Direction From Site A. Public Water Z-14 Kenosha Water Works (control) 10.0 miles N Z-15 Lake County Water Works (indicator) 1.4 miles NNW Z-16 Waukegan Water Works (indicator) 6.1 miles S Z-18. Lake Forest Water Works (control) 12.9 miles S B. Air Particulates Z-01 Onsite 1 (indicator) 0.3 miles S Z-02 Onsite 2 (indicator) 0.2 milesW Z-03 Onsite 3 (indicator) 0.2 miles NNW Z-13 *offsite Control 10 miles NW C. Fish Z-26 Lake Michigan Nearsite (indicator) At station Z-27 Lake Michigan Farsite (indicator) 10.1 miles N D. Sediment

  • Z-25 Lake Michigan, Illinois Beach State Park (indicator) 0.2 miles S E. Vegetation Z-Control Control (control) 0.3 miles S Z-Quad 3 Farm 3 (indicator) 0.2 milesW Z-Quad 4 . Farm 4 (indicator) 0.2 miles NNW F. Environmental Dosimetry - TLD Inner Ring Z-101-1 and -2 0.2 miles N Z-102-1 and -2 0.2 miles NNE Z-103-1 and -2 0.2 miles NE Z-104-1 and -2 0.1 miles ENE Z-105-1 and -2 0.1* miles E Z-106-1 and-2 0.1 miles ESE Z-107-1 and -2 0.1 miles SE Z-108-1 and-2 0.1 miles SSE Z-109-1 and -2 0.2 miles SSE Z-112-1 and -2 0.7milesWSW Z-113-1 and -2 0.6 milesW Z-114-1 and -2 0.6milesWNW Z-115-1 and -2 0.4.miles NW Z-121-1 and -2 0.2 miles NNW Z-124-1 and -2 0.5 miles SW Z-125-1 and -2 0.4 miles SSW Z-129-1 and -2 0.2 miles NW Z-130-1 and -2 0.2milesWNW Z-131-1 and -2 0.2 miles WSW Other Z-01-1 and -2 Onsite 1 (indic;ator) 0.3 miles S Z-02-1 and -2 Onsite 2 (indicator) 0.2 milesW Z-03-1 and -2 Onsite 3 (indicator) 0.2 miles NNW Outer Ring Z-209-1 and -2 5.1 miles S Z-211-1 and-2 4.7 miles SW Z-212-1 and -2 5.1 milesWSW Z-213-1 and-2 5.1 milesW Z-214-1 and -2 4.6milesWNW Z-215-1 and -2 4.0 miles NW Z-216-1 and-2 3.0 miles NNW Control Z-13-1 thru -6 Control 10 miles NW B-1 2018 Zion AREOR

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2017 Sample Analytical Procedure Number Analysis Sampling Method Medium Public Gamma Monthly composite from TBE, TBE-2007 Gamma emitting radioisotope analysis Water Spectroscopy weekly grab samples.

Public Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta activity in Gross Beta various matrices Water weekly grab samples.

Public Quarterly composite from TBE, TBE-2011 Tritium analysis in drinking water by liquid Tritium scintillation Water weekly grab samples.

Semi-annual samples Gamma Fish collected via electroshocking TBE-2007 Gamma emitting radioisotope analysis Spectroscopy or other techniques Gamma Sediment Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy Gamma Vegetation Annual collection at harvest TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy One-week composite of Air TBE, TBE-2008 Gross Alpha and/or gross beta activity in Gross Beta continuous air sampling various matrices ,

Particulates through glass fiber filter paper I

Air Gamma Quarterly composite of each TBE, TBE-2007 Gamma emitting radioisotope analysis Particulates Spectroscopy station Quarterly TLDs comprised of Thermo-two Panasonic Environmental TLD luminescent Mirion Technologies TLD type 814 with 3 CaS04 Dosimetry elements at each location.

B-2 2018 Zion AREOR

G H

- TLD locations

  • - Air Sampler

- Property Line

- Sector Lines &

Y, Mile Radius Figure B-1 Inner Ring TLD and Fixed Air Sampler Locations of the Zion Nuclear Power Station, 2017 8-3 2018 Zion AREOR

1&$

/

....,.,4>,:;._~---__,;:- =,=en SoullMfn ~

Figure B-2 Outer Ring TLD and Fixed Air Sampler Locations of the Zion Nuclear Power Station, 2017 B-4 2018 Zion AREOR

  • --- ~ --- ---

Kenosha Water Works *Z~1 (~antral)

Zion------------*

Lake County Waterworks Z-15 LAKE Illinois Beach State Park MICHIGAN North Chicago

  • Sampling Locations Figure 8-3 Fish, Water and Sediment Sampling Locations of the Zion Nuclear Power Station, 2017 B-5 2018 Zion AREOR

APPENDIXC DATA TABLES AND FIGURES 2018 Zion AREOR

=======-=-~--=--- ---

--====~= . . -*--*-*------* --------. -*::_*_ " *-*-**-~ *-***.-'>'-"'-"'"" u---*.-::-=-*.. ____: ___ _::;----~-----==..:***-**-. * .::...-:.***,*~-.-*

Intentionally left blank 2018 Zion AREOR

~-- --~"--*--*-** ;_ -~-~ .-- ------ *------------*- ------~-*-------~---*

=- _.: : . - -: : . :-______ --------.- -- *-*-*------ . . . . . , __ ::..:::----:--::-:::::-= ~-..::..;.__::::...._~- **----------** - ~ - - - *------

Tabl~ C-1.1 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/liter +/- 2 Sigma COLLECTION PERIOD Z-14 Z-15 Z-16 Z-18 01/04/18 - 01/31/18 2.0 +/- 1.3 < 1.8 < 1.8 < 1.9 02/07/18 - 02/28/18 4.9 +/- 1.6 < 2.0 2.1 +/- 1.4 < 2.1 03/07/18 - 03/28/18 < 1.8 3.1 +/- 1.4 2.2 +/- 1.3 2.4 +/- 1.3 04/05/18 - 04/25/18 < 2.2 < 2.2 < 2.2 2.8 +/- 1.6 05/03/18 - 05/30/18 2.8 +/- 1.5 2.5 +/- 1.5 3.6 +/- 1.6 3.1 +/- 1.5 06/06/18 - 06/27/18 3.3 +/- 1.4 2.6 +/- 1.4 < 1.9 2.3 +/- 1.3 0703/18 - 07/31/18 2.9 +/- 1.5 2.2 +/- 1.4 2.4 +/- 1.5 3.0 +/- 1.5 08/08/18 - 08/29/18 2.8 +/- 1.4 < 2.0 < 2.0 2.4 +/- 1.4 09/06/18 - 09/26/18 4.2 +/- 1.4 1.8 +/- 1.2 2.8 +/- 1.4 < 1.8 10/03/18 - 10/31/18 < 2.1 < 2.1 2.8 +/- 1.6 < 2.2 11/07/18 - 11/28/18 < 2.0 3.2 +/- 1.5 3.2 +/- 1.6 2.6 +/- 1.5 12/05/18 - 12/26/18 < 2.0 2.7 +/- 1.6 1.9 +/- 1.1 2.7 +/- 1.6 MEAN+/- 2 STD DEV 3.3 +/- 2.0 2.6 +/- 1.0 2.6 +/- 1.2 2.6 +/- 0.6.

Table C-1.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/liter +/- 2 Sigma COLLECTION PERIOD Z-14 Z-15 Z-16 Z-18 01 /04/18 - 03/28/18 < 183 < 182 < 184 < 182 04/05/18 - 06/27/18 < 188 < 186 < 190 < 188 07/05/18 - 09/26/18 < 197 < 196 < 193 < 196 10/03/18 - 12/26/18 < 191 < 189 < 189 < 192 MEAN THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-1 2018 Zion AREOR

Table C-1.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/liter +/- 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Z-14 01/04/18 - 01/31/18 < 6 < 9 < 15 < 9 < 17 < 9 < 13 <7 < 8 < 50 < 14 02/07/18 - 02/28/18 <4 <4 < 7 < 3 < 7 <4 <7 <4 <4 < 32 < 10 03/07/18 - 03/28/18 < 5 < 5 < 10 <6 < 12 < 6 < 12 <4 < 6 < 49 < 25 04/05/18 - 04/25/18 < 2 <2 < 5 <2 <4 < 2 <4 < 2 < 2 < 17 < 5 05/03/18 - 05/30/18 <6 < 6 < 11 < 6 < 10 <7 < 10 < 6 < 5 < 59 < 23 06/06/18 - 06/27/18 <2 < 2 < 5 < 2 <4 <2 <4 < 2 <2 < 18 <6 07/05/18 - 07/31/18 < 7 < 7 < 19 < 9 < 14 < 10 < 14 < 8 <7 < 64 < 24 08/08/18 - 08/29/18 < 6 <7 < 18 < 6 < 13 < 9 < 14 <7 < 7 < 64 < 23 09/06/18 - 09/26/18 < 8 < 8 < 20 < 6 < 15 < 6 < 14 < 8 < 7 < 65 < 20 10/03/18 - 10/31/18 < 5 < 5 < 12 <4 < 12 < 6 < 10 < 5 < 6 < 43 < 10 11/07/18 - 11/28/18 < 7 < 8 < 17 < 6 < 17 < 8 < 14 < 6 < 7 < 50 < 17 12/05/18 - 12/26/18 < 7 <7 < 13 < 8 < 13 < 8 < 10 < 7 < 7 < 33 < 12 1, I

I MEAN

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Z-15 01/04/18 - 01/31/18 < 8 < 7 < 18 < 9 < 15 <7 < 11 <7 <6 < 37 < 18 02/07/18 - 02/28/18 <4 <4 < 8 <4 < 7 <4 < 7 <4 < 3 < 31 < 11 03/07/18 - 03/28/18 <4 < 5 < 12 < 5 < 9 < 5 < 11 <4 < 5 < 46 < 19

  • 04/05/18 - 04/25/18 < 3 < 3 <6 < 3 <6 < 3 < 5 < 3 < 3 < 20 <6 05/03/18 - 05/30/18 <6 < 6 < 17 < 6 < 15 < 6 < 14 < 8 < 8 < 71 < 36 06/06/18 - 06/27/18 < 2 <2 < 5 <2 <4 < 2 <4 < 2 < 2 < 17 <7 07/11/18 - 07/31/18 < 5 <7 < 17 <7 < 17 < 9 < 13 < 7 < 6 < 63 < 24 08/08/18 - 08/29/18 <4 <4 < 10 < 5 < 9 < 5 < 8 <: 5 < 5 < 40 < 13 09/06/18 - 09/26/18 < 6 < 8 < 13 < 8 < 11 <7 < 12 < 8 <7 < 60 < 20 10/03/18 10/31/18 < 5 < 7 < 16 < 7 < 14 <6 < 14 < 8 <7 < 47 < 15 11/07/18 - 11/28/18 < 5 < 6 < 14 <4 < 11 < 6 < 13 <7 <6 < 46 < 15 12/05/18 - 12/26/18 <4 <4 < 8 < 5 < 10 <4 <7 < 5 <4 < 25 < 9 '.

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Table C-1.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/liter +/- 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58. Fe-59 Co-60 2n-65 Nb-95 2r-95 Cs-134 Cs-137 Ba-140 La-140 2-16 1/4/2018 - 01/31/18 < 6. <6 < 10 <6 < 14 < 6 < 13 < 7 < 7 < 37 < 10 2/7/2018 - 02/28/18 < 3 < 3 < 6 < 3 < 5 < 3 < 5 < 3 < 3 < 25 <9 3/7/2018 - 03/28/18 <6 < 7 < 21 < 7 < 11 < 9 < 15 < 6 <7 < 66 < 19 4/5/2018 - 04/25/18 < 2 < 2 <6 < 3 <4 <2 <4 < 2 < 2 < 16 <8 5/3/2018 - 05/30/18 <7 < 8 < 20 < 6 < 14 < 9 < 14 <7 <7 < 68 < 23 06/06/18 - 06/27/18 < 2 < 2 <4 <2 <4 <2 < 3 < 2 <2 < 18 <5 07/05/18 - 07/31/18 <7 < 8 < 20 < 9 < 18 < 9 < 15 < 9 < 8 < 70 < 29 08/08/18 - 08/29/18 < 8 < 8 < 19 < 8 < 17 < 9 < 14 < 9 < 8 < 72 < 28 09/06/18 - 09/26/18 <6 < 7 < 18 < 7 < 15 < 8 < 13 < 8 < 7 < 65 < 23 10/03/18 - 10/31/18 < 5 <4 < 12 < 5 < 9 < 5 < 8 < 6 < 5 < 37 < 11 11/07/18 - 11/28/18 < 5 < 5 < 16 < 8 < 12 < 6 < 11 < 6 < 5 < 44 < 15 12/05/18 - 12/26/18 < 7 < 7 < 15 < 9 < 14 < 9 < 13 < 8 < 8 < 45 < 12 MEAN C')

I w

2-18 01/04/18 - 01/31/18 < 7 < 7 < 15 < 7 < 16 < 7 < 12 < 8 < 7 < 43 < 13 02/07/18 - 02/28/18 <3 <4 < 8 < 3 < 7 <4 < 7 <4 < 3 < 29 < 8 03/07/18 - 03/28/18 < 5 < 5 < 12 <4 < 12 < 7 < 11 < 6 <6 < 55 < 13 04/05/18 - 04/25/18 <2 <2 <4 < 2 < 3 <2 < 3 < 2 <2 < 17 <5 05/03/18 --05/30/18 <7 < 7 < 14 < 6 < 12 <6 < 14 < 7 < 6 < 60 < 23 06/06/18 - 06/27/18 < 2 < 2 < 5 < 2 <4 < 2 <4 < 2 <2 < 19 <6 07/05/18 - 07/31/18 < 5 < 8 < 17 < 8 < 8 < 8 < 12 < 8 <6 < 57 < 22 08/08/18 - 08/29/18 < 8 < 8 < 22 < 9 < 16 < 10 < 15 < 8 < 8 < 65 < 18 09/06/18 - 09/26/18 < 6 < 8 < 13 < 7 < 13 < 9 < 12 <7 < 7 < 75 < 16 10/03/18 - 10/31/18 < 5 < 7 < 12 < 3 < 12 < 7 < 12 < 8 <6 < 43 < 14 11/07/18 - 11/28/18 < 5 < 6 < 12 < 3 < 13 < 6 < 11 <6 < 6 < 36 < 11 I\) 12/05/18 - 12/26/18 <7 < 7 < 15 < 7 < 14 <7 < 12 <7 < 6 < 36 < 12 0

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Table C-11.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/kilograms wet +/- 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Z-26 (Predator)

White Sucker 05/01/18 < 67 < 76 < 183 < 72 < 125 < 90 < 138 < 65 < 67 < 1217 < 287 Largemouth Bass 05/01/18 < 45 < 58 < 152 < 51 < 110 < 73 < 105 < 52 < 51 < 816 < 226 Common carp 10/04/18 < 44 < 72 < 202 < 43 < 120 < 74 < 98 < 64 < 55 < 906 < 318 Brown trout 10/04/18 < 65 < 76 < 175 < 41 < 130 < 69 < 139 < 77 < 69 < 1504 < 401 MEAN Z-27 (Predator)

Lake Trout 05/15/18 < 92 < 86 < 219 < 81 < 170 < 98 < 142 < 89 < 98 < 837 < 236 Burbot 05/15/18 < 76 < 101 < 165 < 75 < 169 < 100 < 146 < 86 < 99 < 744 < 182 C')

I Lake Trout 10/26/18 < 51 < 51 < 83 < 43 < 107 < 54 < 93 < 56 < 46 < 342 < 103

~

Burbot 10/26/18 < 51 < 36 < 86 < 45 < 81 < 51 < 85 < 40 < 51 < 243 < 83 MEAN N

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Table C-111.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/kilograms Dry + 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Z-25 05/16/18 < 40 < 43 < 97 < 43 < 91 < 47 < 71 < 41 < 49 < 198 < 59 10/24/18 < 54 < 52 < 140 < 70 < 129 < 60 < 112 < 65 < 66 < 240 < 30 MEAN 0I 01 N

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Table C-IV.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of E-3 pCi/cubic meter +/- 2 Sigma COLLECTION GROUP I GROUP II PERIOD Z-01 Z-02 Z-03 Z-13 12/27/17 - 01/04/18 29 +/- 5 26 +/- 4 27 +/- 4 30 +/- 5 01/04/18 - 01/10/18 20 +/- 5 18 +/- 5 20 +/- 5 17 +/- 5 01/10/18 - 01/17/18 13 +/- 4 10 +/- 4 11 +/- 4 10 +/- 4 01/17/18 - 01/24/18 14 +/- 4 17 +/- 4 19 +/- 4 20 +/- 4 01/24/18 - 01/31/18 14 +/- 4 17 +/- 4 14 +/- 4 12 +/- 4 01/31/18 - 02/07/18 20 +/- 4 21 +/- 4 21 +/- 5 22 +/- 4 02/07/18 - 02/14/18 27 +/- 5 23 +/- 5 26 +/- 5 23 +/- 5 02/14/18 - 02/21/18 17 +/- 4 14 +/- 4 16 +/- 4 14 +/- 4 02/21/18 - 02/28/18 12 +/- 4 15 +/- 4 13 +/- 4 14 +/- 4 02/28/18 - 03/07 /18 12 +/- 4 11 +/- 4 14 +/- 5 11 +/- 4 03/07/18 - 03/14/18 10 +/- 4 8 +/- 4 17 +/- 4 12 +/- 4 03/14/18 - 03/21/18 15 +/- 4 11 +/- 4 *19 +/- 4 12 +/- 4 03/21/18 - 03/28/18 11 +/- 4 6+/-4 20 +/- 9 7+/-4 03/28/18 - 04/05/18 14 +/- 4 9 +/- 3 19 +/- 4 < 4 04/05/18 - 04/12/18 16 +/- 4 9 +/- 4 16 +/- 4 13 +/- 4 04/12/18 - 04/18/18 10 +/- 4 9 +/- 4* 9 +/- 4 7 +/- 4 04/18/18 - 04/25/18 14 +/- 4 13 +/- 4 16 +/- 4 14 +/- 4 04/25/18 - 05/03/18 13 +/- 3 11 +/- 3 13 +/- 3 12 +/- 3 05/03/18 - 05/09/18 17 +/- 5 11 +/- 4 19 +/- 5 15 +/- 5 05/09/18 - 05/16/18 10 +/- 4 7 +/- 3 9 +/- 3 10 +/- 4 05/16/18 - 05/23/18 6 +/- 3 10 +/- 3 11 +/- 4 8 +/- 3 05/23/18 - 05/30/18 32 +/- 8 26 +/- 7 41 +/- 8 39 +/- 8 05/30/18 - 06/06/18 11 +/- 4 7 +/- 3 9 +/- 3 8 +/- 3 06/06/18 - 06/13/18 12 +/- 4 7 +/- 3 7 +/- 3 12 +/- 4 06/13/18 - 06/20/18 14 +/- 4 11 +/- 4 14 +/- 4 18 +/- 4 06/20/18 - 06/27/18 12 +/- 4 6 +/- 3 13 +/- 4 11 +/- 4 06/27/18 - 07/05/18 12 +/- 4 7 +/- 3 12 +/- 4 12 +/- 4 07/05/18 - 07/11/18 18 +/- 5 13 +/- 4 17 +/- 5 17 +/- 5 07/11/18 - 07/18/18 16 +/-4 11 +/- 3 15 +/- 4 14 +/- 4 07/18/18 - 07/25/18 13 +/- 4 8 +/- 3 14 +/- 4 13 +/- 4 07/25/18 - 07/31/18 22 +/- 5 13 +/- 4 19 +/- 4 19 +/- 4 07/31/18 - 08/08/18 19 +/- 4 11 +/- 3

  • 19 +/- 4 21 +/- 4 08/08/18 - 08/15/18 19 +/- 4 9 +/- 3 17 +/- 4 .19 +/- 4 08/15/18 - 08/22/18 18 +/- 4 17 +/- 4 23 +/- 4 23 +/- 4 08/22/18 - 08/29/18 20 +/- 4 14 +/- 4 23 +/- 4 21 +/-. 4 08/29/18 - 09/06/18 7 +/- 3 4 +/- 3 10 +/- 3 9 +/- 3 09/06/18 - 09/12/18 12 +/- 4 12 +/- 4 16 +/- 4 13 +/- 4 09/12/18 - 09/19/18 14 +/- 4 9 +/- 4 10 +/- 4 13 +/- 4 09/19/18 - 09/26/18 14 +/- 4 10 +/- 3 16 +/- 4 13 +/- 4 09/26/18 - 10/03/18 11 +/- 4 10 +/- 4 13 +/- 4 14 +/- 4 10/03/18 - 10/10/18 15 +/- 4 12 +/- 4 11 +/- 4 13 +/- 4 10/10/18 - 10/17/18 14 +/- 4 10 +/- 4 17 +/- 4 13 +/- 4 10/17/18 - 10/24/18 11 +/- 4 8 +/- 3 10 +/- 3 13 +/- 4 10/24/18 - 10/31/18 12 +/-4 8 +/- 3 15 +/- 4 15 +/- 4 10/31/18 - 11/07/18 12 +/-4 6 +/- 3 12 +/- 4 12 +/- 4 11/07/18 - 11/14/18 14 +/- 4 8 +/- 4 16 +/- 4 14 +/- 4 11/14/18 - 11/21/18 19 +/- 4 15 +/- 4 22 +/- 4 20 +/- 4 11/21/18 - 11/28/18
  • 20 +/- 4 15 +/- 4 22 +/- 5 22 +/- 5 11/28/18 - 12/05/18 12 +/- 4 11 +/- 4 15 +/- 4 14 +/- 4 12/05/18 - 12/12/18 29 +/- 5 23 +/- 5 36 +/- 5 30 +/- 5 12/12/18 - 12/19/18 28 +/- 5 24 +/- 5 34 +/- 6 38 +/- 6 12/19/18 - 12/26/18 21 +/- 4 17 +/- 4 23 +/- 4 26 +/- 5 MEAN+/- 2 STD DEV 16 +/- 11 12 +/- 11 17 +/- 13 16 +/- 14 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-6 2018 Zion AREOR

Table C-IV.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of E-3 pCi/cubic meter+/- 2 Sigma GROUP I - ONSITE LOCATIONS GROUP 11-0FFSITE CONTROL LOCATION COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN PERIOD +/-2SD PERIOD +/-2SD 12/27/17 - 01/31/18 10 29 18 +/- 11 12/27/17 - 01/31/18 10 30 18 +/- 16 01/31/18 - 02/28/18 12 27 19 +/- 10 01/31/18 - 02/28/18 14 23 18 +/- 10 02/28/18 - 03/28/18 6 20 13 +/- 9 02/28/18 - 03/28/18 7 12 10 +/- 4 03/28/18 - 05/03/18, 9 19 13 +/- 7 04/05/18 - 05/03/18 7 14 12 +/- 6 05/03/18 - 05/30/18 6 41 17 +/- 22 05/03/18 - 05/30/18 8 39 18 +/- 28 05/30/18 - 06/27/18 6 14 10 +/- 6 05/30/18 - 06/27/18 8 18 12 +/- 8 06/27/18 - 07/31/18 7 22 14 +/- 8 06/27/18 - 07/31/18 12 19 15 +/- 6 07/31/18 - 08/29/18 9 23 17 +/- 8 . 07/31/18 - 08/29/18 19 23 21 +/- 3 08/29/18 - 10/03/18 4 16 11 +/- 6 08/29/18 C 10/03/18 9 14 12 +/- 4 10/03/18 - 10/31/18 8 17 12 +/- 6 10/03/18 - 10/31/18 13 15 13 +/- 2 10/31/18 - 11/28/18 6 22 15 +/- 10 10/31/18 - 11/28/18 12 22 17 +/- 9 11/28/18 - 12/26/18 11 36 23 +/- 16 11/28/18 - 12/26/18 14 38 27 +/- 20 12/27/17 - 12/26/18 4 41 15 +/- 12 12/27/17 - 12/26/18 7 39 16 +/- 14 C-7 2018 Zion AREOR

Table C-IV.3 _ Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of E-3 pCi/cubic meter+ 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Z-01 12/27/17 - 03/28/18 < 1 < 3 < 4 < 3 < 5 <2 < 4 < 2 < 2 < 26 < 9 03/28/18 - 06/27/18 < 2 < 2 < 6 < 3 <4 < 3 < 6 < 3 < 2 < 21 < 9 06/27/18 - 09/26/18 < 2 < 2 < 3 < 1 < 3 < 2 < 3 < 1 < 2 < 21 < 10 09/26/18 - 12/26/18 < 2 < 2 < 7 < 3 < 5 < 3 < 5 < 3 < 2 < 24 < 10 MEAN Z-02 12/27/17 - 03/28/18 <2 < 3 < 6 < 2 < 5 < 3 < 5 < 3 <2 < 28 < 13 03/28/18 - 06/27/18 < 1 < 1 < 6 < 3 < 6 < 3 <3 < 3 <2 < 21 < 7 06/27/18 - 09/26/18 < 3 < 5 < 10 < 5 < 10 < 5 < 8 < 4 < 3 < 72 < 24 09/26/18 - 12/26/18 <2 < 3 < 6 < 3 < 5 < 2 < 5 < 2 <2 < 25 < 10 MEAN 0I Z-03 12/27/17 - 03/28/18 < 5 <6 < 15 < 5 < 14 < 7 < 10 < 5 <4 < 62 < 23 00 03/28/18 - 06/27/18 < 2 <2 < 7 < 3 < 5 < 3 < 5 < 3 < 2 < 28 < 9 06/27/18 - 09/26/18 <2 < 3 < 7 < 2 < 5 <4 < 5 < 3 <2 < 39 < 15 09/26/18 - 12/26/18 < 2 < 2 < 4 < 2 < 3 < 3 < 5 < 2 <2 < 20 < 10 MEAN Z-13 12/27/17 - 03/28/18 < 2 < 3 < 5 < 3 < 6 < 2 <4 < 2 < 2 < 24 < 13 03/28/18 - 06/27/18 < 3 < 2 < 7 < 2 < 6 < 3 <6 < 3 < 3 < 24 < 9 06/27/18 - 09/26/18 < 2 < 2 < 8 < 5 < 5 < 3 < 5 < 3 < 2 < 37 < 18 09/26/18 - 12/26/18 < 3 < 2 < 4 < 3 < 5 < 3 <4 < 3 < 2 < 25 < 12 MEAN N

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er

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0 m

0

0

Table C-V.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Zion Nuclear Power Station, 2018 Results in Units of pCi/kilograms wet +/- 2 Sigma COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-1401 Z-CONTROL Potatoes 09/19/18 < 21 < 17 < 42 < 23 < 51 < 23 < 42 < 26 < 19 < 104 < 28 Cabbage 09/19/18 < 20 < 20 < 40 < 26 < 38 < 22 < 33 < 17 < 21 < 89 < 21 MEAN Z-QUAD 3 Cabbage

  • 09/19/18 < 15 < 14 < 32 < 15 < 34 < 18 < 25 < 14 < 16 < 75 < 22 Carrots 09/19/18 < 20 < 28 < 54 < 27 < 56 < 29 < 48 < 29 < 31 < 127 < 29 MEAN C')

I (0

Z-QUAD 4 Cauliflower 09/19/18 < 18 < 18 < 40 < 19 < 42 < 22 < 26 < 21 < 20 < 83 < 13 Sweet potatoes 09/19/18 < 18 < 16 < 36 < 20 < 41 < 17 < 35 < 18 < 21 < 81 < 15 MEAN I\)

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0 m

0

0

Table C-Vl.1 Quarterly TLD Results for Zion Nuclear Power Station, 2018 Results in Units of Milli-Roentgen/Quarter+/- 2 Standard Deviations STATION MEAN CODE +/- 2 S.D. JAN- MAR APR-JUN JUL- SEP OCT- DEC Z-01 18 +/- 4 16 17 20 19 Z-02 17 +/- 2 15 17 17 17 Z-03 17 +/- 3 15 17 19 18 Z-13 19 +/- 4 16 19 21 20 Z-101 16 +/- 3 14 16 18 17 Z-102 18 +/- 3 16 18 19 18 Z-103 17 +/- 3 15 17 18 17 Z-104 17 +/- 4 14 18 18 18 Z-105 17 +/- 3 15 17 18 18 Z-106 17 +/- 4 15 16 18 19 Z-107 17 +/- 2 16 17 17 18 Z-108 18 +/- 3 16 19 18 20 Z-109 19 +/- 3 16 19 20 19 Z-112 19 +/- 4 16 18 20 20 Z-113 17 +/- 5 14 17 19 19 Z-114 18 +/- 4 15 18 19 19 Z-115 18 +/- 4 15 19 20 18 Z-121 17 +/- 3 14 17 18 17 Z-124 17 +/- 5 14 17 20 18 Z-125 20 +/- 6 24 17 19 18 Z-129 17 +/- 4 14 17 18 18 Z-130 19 +/- 5 15 19 20 20 Z-131 30 +/- 5 26 30 32 30 Z-209 17 +/- 3 15 17 19 18 Z-211 21 +/- 5 18 21 24 22 Z-212 21 +/- 5 18 21 24 22 Z-213 23 +/- 5 19 23 25 23 Z-214 21 +/- 5 17 21 23 21 Z-215 21 +/- 6 17 22 24 21 Z-216 18 +/- 3 15 18 19 18 C-10 2018 Zion AREOR

Table C-Vl.2 MEAN QUARTERLY TLD RESULTS FOR INNER RING, OUTER RING, SPECIAL INTEREST, AND CONTROL STATIONS FOR ZION NUCLEAR POWER STATION, 2018 Results in Units of Milli-Roentgen/Quarter+/- 2 Standard Deviations of the Station Data COLLECTION INNER RING OUTER RING SPECIAL INTEREST CONTROL PERIOD +/-2S.D. +/-2 S.D. +/- 2 S.D. +/- 2 S.D.

JAN-MAR 16 +/- 7 17 +/- 3 15 +/- 2 16 +/- 1 APR-JUN 18 +/- 6 20 +/- 5 18 +/- 2 19 +/- 1 JUL-SEP 19 +/- 7 23 +/- 5 20 +/- 1 21 +/- 1 OCT-DEC 19 +/- 6 21 +/- 4 19 +/- 2 20 +/- 1 Table C-Vl.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR ZION NUCLEAR POWER STATION, 2018 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER SAMPLES PERIOD PERIOD PERIOD MEAN LOCATION ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 142 13 32 18 +/- 7 OUTER RING 56 14 25 20 +/- 6 SPECIAL INTEREST 32 14 20 18 +/- 4 CONTROL 24 15 21 19 +/- 4 INNER RING STATIONS - Z-01, Z-02, Z-03, Z-101, Z-102-1, Z-103-1, Z-104, Z-105, Z-106, Z-107, Z-108, Z-109, Z-121, Z-124, Z-125,, Z-129, Z130, Z-131 .

SPECIAL INTEREST STATIONS c Z-112, Z-113, Z-114, Z-115 OUTER RING STATIONS - Z-209, Z-211, Z-212, Z-213, Z-214, Z-215, Z-216 CONTROL STATION - Z-13

  • Note: There are 2 TLDs posted at each indicator station for redundancy and data recovery.

In reporting results, the higher of the two readings are reported, except when reporting minimums, which are based on all results. There are six (6) TLDs posted at the control location, and that value is based on an average of all six results each quarter.

The period minimum in Table C-Vl.3, above, was 13 mR/quarter at location Z-101. It was the single lowest result of all 254 TLD's analyzed during the year.

C-11 2018 Zion AREOR

FIGURE C-1 PUBLIC WATER - GROSS BETA - STATIONS Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 Z-14 (C) Kenosha Water Works 5.0 4.0 3.0 2.0 1.0 0.0 - - - - - - - , . . . . - - - - - - - - r - - - - " " " ' T " " " - - - - - - ,

01-26-00 10-20-04 07-15-09 04-09-14 01-02-19

  • Z-15 Lake County Water Works 7.0 6.0 5.0 4.0 uQ. 3.0 2.0 1.0 0.0 01-26-00 10-20-04 07-15-09 04-09-14 01-02-19 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-12 2018 Zion AREOR

FIGURE C-2 PUBLIC WATER - GROSS BETA - STATIONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 Z-16 Waukegan Water Works 10.0 9.0 8.0 7.0 6.0

! 5.0 uC.

4.0 3.0 2.0 1.0 0.0 01-26-00 10-20-04 07-15-09 . 04-09-14 01-02-19 Z-18 (C) Lake Forest Water Works 10.0 9.0 8.0 7.0 6.0

! 5.0 uC.

4.0 3.0 2.0 1.0 0.0 01-26-00 10-20-04 07-15-09

  • 04-09-14 01-02-19 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-13 2018 Zion AREOR

FIGURE C-3 PUBLIC WATER -TRITIUM - STATION Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 2-14 {C) Kenosha Water Works 300 200 0C.

100 0--------1-----------------1 01-01-00 10-01-04 07-02-09 04-02-14 01-01-19 2-15 Lake County Water Works 300 250 200

! 150 0C.

100 50 0------------------------1 03-29-00 12-06-04 08-15-09 04-24-14 01-01-19 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES

~

AFTER JUNE 2005 I

C-14 2018 Zion AREOR

FIGURE C-4 PUBLIC WATER -TRITIUM - STATION Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 Z-16 Waukegan Water Works 250 200 150 100 50 o----<>---4-------------------1 03-29-00 12-06-04 08-15-09 04-24-14 01-01-19 Z-18 (C) Lake Forest Water Works 250 200 150 100 50 o~---'-----'"--1----------+-------1 03-29-00 12-06-04 08-15-09 04-24-14 01-01-19 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-15 2018 Zion AREOR

FIGURE C-5 AIR PARTICULATES - GROSS BETA - STATIONS Z-01 AND Z-02 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 Z-01 Onsite No. 1, Southside 60.0 50.0

~ 40.0 0

..,c. 30.0 C

....~ 20.0 10.0 0.0 - - - - - - - - - - . . - - - - - - - i - - - - - - ' - - - - - - I 01-05-00 10-22-03 08-08-07 05-25-11 03-11-15 12-26-18 Z-02 Onsite No. 2, Westside 70.0 60.0

.., 50.0

.§ 0C. 40.0 S 30.0 UJ C

..- 20.0 10.0 0.0 +----+-------1-----+---.__-----I 01-05-00 10-22-03 08-08-07 05-25-11 03-11-15 12-26-18 C-16 2018 Zion AREOR

FIGURE C-6 AIR PARTICULATES - GROSS BETA - STATIONS Z-03 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2018 Z-03 Onsite No. 3, Northside 90.0 80.0 70.0 e 60.0

~ 50.0 a.

qM 40.0

....~ 30.0 20.0 10.0 0.0 - - - - " " " " ' " - - - - - - ' - - - - - - - - - - - - - - - 1 01-05-00 10-22-03 08-08-07 05-25-11 03-11-15 12-26-18 AIR PARTICULATES - GROSS BETA - STATION Z-13 COLLECTED IN THE VICINITY OF ZNPS, 2013 - 2018 Z-13 Offsite Control 50.0 40.0 M

E

~ 30.0 a.

M

~ 20.0 C

10.0 0.0 + - - - - - - + - - - - - - - - - - - - - - - I 04-10-13 09-14-14 02-18-16 07-24-17 12-28-18 C-17 2018 Zion AREOR

FIGURE C-7 ZNPS INNER RING TLD'S POTENTIALLY IMPACTED BY ISFSI 2018 35.00 30.00

... 25.00

~

"'::I CJ 20.00

~

0..

E 15.00

~

  • -E 10.00 5.00 0.00 QTR 1 QTR 2 QTR 3 QTR4 Z-13-Control
  • Z-01
  • Z-109 Z-131 2013 - 2018 60.00

... 50.00

~"'

E 40.00

~

E

> 30.00

~

~

"'C"

I 20.00

~

c.o

~

10.00 0.00 2013 2014 2015 2016 2017 2018 Z Control

  • Z-01
  • Z-109 Z-131 C-18 2018 Zion AREOR

FIGURE C-8 ZNPS AREA BOUNDARY TLD'S AT 4 COMPASS POINTS 2018 30.00 25.00

-Qj nl

l CJ 20.00 Qj 15.00 a.

E Qj Qj 10.00 E

5.00 0.00 QTR 1 QTR 2 QTR 3 QTR 4 Z Control

  • Z-124 S Z-02 W
  • Z-101 N Z-105 E 2013 - 2018 35.00 nl 30.00

~

....... 25.00 E

Qj

- 20 .00 E

1:

Qj nl

l O"

15.00 Qj llO 10.00 nl Qj nl 5.00 0.00 2013 2014 2015 2016 2017 2018 Z Control

  • Z-124-S Z-02 -W *Z-101-N Z-105 - E C-1 9 2018 Zion AREOR

Intentionally left blank 2018 Zion AREOR

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM 2018 Zion AREOR

Intentionally left blank 2018 Zion AREOR

Analytics Environmental Radioactivity Cross-Check Program

- - -TABLE

- ~ D.1 --~-~--~~: _.:__::_____Teledyne Brown Engineering Eiwirorfmentar Services - -

TBE Identification Known Ratio ofTBE to Month/Year Matrix Nuclide

  • Units Reported Evaluation (bl Number Value (al Analytics Result Value March 2018 - E12133 Milk Sr-89 pCi/L 76.1 90.1 0.84 A Sr-90 pCi/L 12.2 12.5 0.98 A E12134 Milk Ce-141 pCi/L 77.8 77.0 1.01 A Co-58 pCi/L 105 114 0.92 A Co-60 pCi/L 181 187 0.97 A Cr-51 pCi/L 298 326 0.92 A Cs-134 pCi/L 150 180 0.84 A Cs-137 pCi/L 164 172 0.95 A Fe-59 pCi/L 140 139 1.01 A 1-131 pCi/L 105 108.0 0.97 A Mn-54 pCi/L 133 131 1.01 A Zn-65 pCi/L 242 244 0.99 A E12135 Charcoal 1-131 pCi 93.7 95.4 0.98 A E12136 AP Ce-141 pCi 92.6 85.3 1.09 A Co-58 pCi 130 126 1.03 A Co-60 pCi 237 207 1.14 A Cr-51 pCi 411 361 1.14 A Cs-134 pCi 194 199 0.98 A Cs-137 pCi 200 191 1.05 A Fe-59 pCi 160 154 1.04 A Mn-54 pCi 152 145 1.05 A Zn-65 pCi 267 271 0.99 A E12137 Water Fe-55 pCi/L 1990 1700 1.17 A E12138 Soil Ce-141 pCi/g 0.148 0.118 1.26 w Co-58 pCi/g 0.171 0.174 0.98 A Co-60 pCi/g 0.297 0.286 1.04 A Cr-51 pCi/g 0.537 0.498 1.08 A Cs-134 pCi/g 0.274 0.275 1.00 A Cs-137 pCi/g 0.355 0.337 1.05 A Fe-59 pCi/g 0.243 0.212 1.15 A Mn-54 pCi/g 0.228 0.201 1.14 A Zn-65 pCi/g 0.395 0.374 1.06 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0. 80-1. 20 W = Acceptable with warning - reported result falls within 0. 70-0. 80 or 1. 20-1. 30 N = Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and> 1.30 (Page 1 of 4)

D-1 2018 Zion AREOR

Analytics Environmental Radioactivity Cross Check Program TABLE D.1 Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (aJ Analytics Result Value June 2018 E1i205 Milk Sr-89 pGi/L 74.9 84.6 0.89 A Sr-90 pGi/L 10.5 11.4 0.92 A E12206 Milk Ce-141 pCi/L 89.2 82.2 1.08 A Co-58 pCi/L 94.8 89 1.07 A Co-60 pCi/L 125 113 1.10 A Cr-51 pCi/L 256 239 1.07 A

. Cs-134 pCi/L 112 114 0.99 A Cs-137 pCi/L 107 98.8 1.08 A Fe-59 pCi/L. 95.9 86.0 1.12 A 1-131 pCi/L 69.8 71.9 0.97 A Mn-54 pCi/L 138 130 1.06 A Zn-65 pCi/L 186 157 1.18 A E12207 Charcoal 1-131 pCi 69.6 72.2 0.96 A E12208 AP Ce-141 pCi 151 r 165 0.92 A Co-58 pCi 174 178 0.98 A Co-60 pCi 290 227 1.28 w Cr-51 pCi 452 478 0.95 A Cs-134 pCi 215 227 0.95 A Cs-137 pGi 206 198 1.04 A Fe-59 pCi 180 172 1.05 A Mn-54 pCi 265 260 1.02 A Zn-65 pCi 280 315 0.89 A E12209 Water Fe-55 pCi/L 1790 1740 1.03 A

' 77.8.

E12210 AP Sr-89 pCi 90.3 0.86 A Sr-90 pCi 9.54 12.2 0.78 w (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-2 2018 Zion AREOR

Analytics Environmental Radioactivity Cross Check Program TABLE D.1 Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (a) Analytics Result Value September 2018 E12271 Milk Sr-89 pCi/L 79.4 81.7 0.97 A Sr-90 pCi/L 12.2 14.8 0.82 A E12272 Milk Ce-141 pCi/L 152 128 1.19 A Co-58 pCi/L 161 144 1.12 A Co-60 pCi/L 208 190 1.10 A Cr-51 pCi/L 244 265 0.92 A Cs-134 pCi/L 124 123 1.01 A Cs-137 pCi/L 166 147 1.13 A Fe-59 pCi/L 158 119 1.32 N(1l 1-131 pCi/L 83.1 58.2 1.43 N(2l Mn-54 pCi/L 191 167 1.14 A Zn-65 pCi/L 229 201 1.14 A E12273 Charcoal 1-131 pCi 83.0 80.7 1.03 A E12274 AP Ce-141 pCi 101 85.6 1.18 A Co-58 pCi 92.7 96.0 0.97 A Co-60 pCi 142 127 1.12 A Cr-51 pCi 218 177 1.23 w Cs-134 pCi 81.2 81.9 0.99 A Cs-137 pCi 99.0 98.5 1.01 A Fe-59 pCi 93.7 79.7 1.18 A Mn-54 pCi 116 112 1.04 A Zn-65 pCi 139 134 - 1.04 A E12302 Water Fe-55 pCi/L 2120 1820 1.17 A E12276 Soil Ce-141 pCi/g 0.259 0.221 . 1.17 A Co-58 pCi/g 0.279 0.248 1.12 A Co-60 pCi/g 0.367 0.328 1.12 A Cr-51 pCi/g 0.597 0.457 1.31 N (3)

Cs-134 pCi/g 0.261 0.212 1.23 w Cs-137 pCi/g 0.376 0.330 1.14 A Fe-59 pCi/g 0.248 0.206 1.20 A Mn-54 pCi/g 0.317 0.289 1.10 A Zn-65 pCi/g 0.407 0.347 1.17 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

=

A Acceptable - reported result falls within ratio limits of 0. 80-1. 20

=

W Acceptable with warning - reported result falls within 0. 70-0.80 or 1.20-1.30

=

N Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and > 1. 30 (1) See NCR 18-20 (2) See NCR 18-24 (3) See NCR 18-21 (Page 3 of 4)

D-3 2018 Zion AREOR

Analytics Environmental Radioactivity Cross Check Program TABLE D.1 Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (a) Analytics Result Value December 2018 E12313 Milk Sr-89 pCi/L 71.9 91.9 0.78 w Sr-90 pCi/L 12.1 13.3 0.91 A E12314 Milk Ce-141 pCi/L 124 133 Q.93 A Co-58 pCi/L 110 119 0.93 A Co-60 pCi/L 202 212 0.95 A Cr-51 pCi/L 292 298 0.98 A Cs-134 pCi/L 146 171 0.85 A Cs-137 pCi/L 118 121 0.98 A Fe-59 pCi/L 120 114 1.05 A 1-131 pCi/L 94.2 93.3 1.01 A Mn-54 pCi/L 151 154 0.98 A Zn-65 pCi/L 266 264 1.01 A E12315 Charcoal 1-131 pCi 94.8 89.9 1.05 A E12316A AP Ce-141 pCi 92.3 94.0 0.98 A Co-58 pCi 73.4 83.8 0.88 A Co-60 pCi 137 150 0.91 A Cr-51 pCi 202 210 0.96 A Cs-134 pCi 115 121 0.95 A Cs-137 pCi 85.0 85.4 1.00 A Fe-59 pCi 83.1 80.8 1.03 A Mn-54 pCi 104 109 0.96 A Zn-65 pCi 168 187 0.90 A E12317 Water Fe-55 pCi/L 2110 1840 1.15 Ar E12318 AP Sr-89 pCi 81.1 83.0 0.98 A Sr-90 pCi 11.4 12.0 0.95 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 - report~d 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 4 of 4)

D-4 2018 Zion AREOR

DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

TABLE D.2 Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value (a) Range Value February 2018 18-MaS38 Soil Ni-63 Bq/kg 9.94 (1) A Sr-90 Bq/kg 0.846 (1) A 18-MaW38 Water Am-241 Sq/L 0.785 0.709 0.496 - 0.922 A Ni-63 Sq/L 12.6 14.0 9.8-18.2 A

.Pu-238 Sq/L 0.0214 0.023 (2) A Pu-239/240 Sq/L 0.544 0.600 0.420 - 0.780 A 18-RdF38 AP U-234/233 Sq/sample 0.111 0.124 0.087 - 0.161 A U-238 Sq/sample 0.123 0.128 0.090 - 0.166 A 18-RdV38 Vegetation Cs-134 Sq/sample 2.46 3.23 2.26- 4.20 w Cs-137 Sq/sample 3.14 3.67 2.57 - 4.77 A Co-57 Sq/sample 4.12 4.42 3.09 - 5.75 A Co-60 Sq/sample 1.86 2.29 1.60 - 2.98 A Mn-54 Sq/sample 2.21 2.66 1.86 - 3.46 A Sr-90 Sq/sample NR(3l Zn-65 Sq/sample -0.201 (1) A November 2018 18-MaS39 Soil Ni-63 Sq/kg 703 765 536 - 995 A Sr-90 Sq/kg 137 193 135 - 251 w 18-MaW39 Water Am-241 Sq/L 0.0363 (1) A Ni-63 Sq/L 6.18 7.0 4.9- 9.1 A Pu-238 Sq/L 0.73 0.674 0.472 - 0.876 A Pu-239/240 Sq/L 0.89 0.928 0.650 - 1.206 A 18-RdF39 AP U-234/233 Sq/sample 0.159 0.152 0.106- 0.198 A U-238 Sq/sample 0.162 0.158 0.111-0.205 A 18-RdV39 Vegetation Cs-134 Sq/sample 1.85 1.94 1.36 - 2.52 A Cs-137 Sq/sample 2.5 2.36 1.65 - 3.07 A Co-57 Sq/sample 3.53 3.31 2.32- 4.30 A Co-60 Sq/sample 1.6 1.68 1.18 - 2.18 A Mn-54 Sq/sample 2.61 2.53 1.77 - 3.29 A Sr-90 Sq/sample 0.338 0.791 0.554 - 1.028 N(4l Zn-65 Sq/sample 1.32 1.37 0.96- 1.78 A (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOEIMAPEP evaluation:

=

A Acceptable - reported result falls within ratio limits of 0. 80-1. 20 W =Acceptable with warning - reported result falls within 0. 70-0. 80 or 1. 20-1. 30 N =Not Acceptable - reported result falls outside the ratio limits of< 0. 70 and> 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 18-09 (4) See NCR 18-25 (Page 1 of 1)

D-5 2018 Zion AREOR

ERA Environmental Radioactivity Cross Check Program TABLE D.3 Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (bl Number Value(a) Limits Value March 2018 MRAD-28 AP GR-A pCi/sample 65.7 43.4 22.7 - 71.5 A GR-B pCi/sample 57.2 52 31.5 - 78.6 A April 2018 RAD-113 Water Ba-133 pCi/L 91.2 91;5 77.1 -101 A Cs-134 pCi/L 70.4 75.9 62.0- 83.5 A Cs-137 pCi/L 122 123 111-138 A Co-60 pCi/L 64.8 64.3 57.9 - 73.2 A Zn-65 pCi/L 98.6 86.7 78.0 -104 A GR-A pCi/L 32.8 28.6 14.6 - 37.5 A GR-B pCi/L 62.9 73.7 51.4-81.1 A U-Nat pCi/L 6.7 6.93 5.28 - 8.13 A H-3 pCi/L 17100 17200 15000 - 18900 A Sr-89 pCi/L 38.6 48.8 38.3 - 56.2 A Sr-90 pCi/L 27.1 26.5 19.2 - 30.9 A 1-131 pCi/L 26.7 24.6 20.4 - 29.1 A September 2018 MRAD-29 AP GR-A pCi/sample 49.7 55.3 28.9 - 91.1 A AP GR-B pCi/sample 75.3 86.5 52.4 - 131 A October 2018 RAD-115 Water Ba-133. pCi/L 15.2 16.3 11.9 - 19.4 A Cs-134 pCi/L 85.9 93.0 76.4 - 102 A Cs-137 pCi/L 229 235 212 - 260 A Co-60 pCi/L 81.9 80.7 72.6-91.1 A Zn-65 pCi/L 348 336 302- 392 A GR-A pCi/L 38.9 60.7 31.8 - 75.4 A GR-B pCi/L 36.5 41.8 27.9-49.2 A U-Nat pCi/L 17.48 20.9 16.8 - 23.4 A H-3 pCi/L 2790 2870 2410 - 3170 A 1-131 pCi/L 26.9 27.2 22.6 - 32.0 A Sr-89 pCi/L 57.2 56.9 . 45.5-64.6 A Sr-90 pCi/L 36.8 31.4 22.9- 36.4 N(1J (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 18-23 (Page 1 of 1)

D-6 2018 Zion AREOR

APPENDIX E ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR) 2018 Zion AREOR

Intentionally left blank 2018 Zion GWPPR

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