ML102020457

Submittal of 2009 Annual Radiological Environmental Operating Report

ML102020457
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	05/05/2010
From:	Schuster R Exelon Nuclear, Teledyne Brown Engineering Environmental Services
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
Download: ML102020457 (170)

Text

May 5, 2010 U.S. Nuclear Regulatory Commission Attn: Document Control Washington D.C. 20555-0001 Zion Nuclear Power Station, Units 1 and 2 Facility Operating License Nos. DPR-39 and DPR-48 NRC Docket Nos. 50-295 and 50-304

Subject:

Submittal of Zion Nuclear Power Station, Unit 1 and 2 2009 Annual Radiological Environmental Operating Report.

In accordance with Technical Specification 5.7.2, "Annual Radiological Environmental Operating Report" Zion Station is submitting the 2009 Annual Radiological Environmental Operating Report for Unit 1 and 2.

Technical Specification 5.7.2 requires submittal of an Annual Radiological Environmental Operating Report before May 15 of each year. The attachment to this letter is the Annual Radiological Environmental Operating Report.

If you have any questions about this report, please contact Ken Greenlee at 847-379-2700.

Respectfully, Ronald J Schuster Decommissioning Plant Manager Zion Nuclear Station

Attachment:

2009 Annual Radiological Environmental Operating Report cc:

Regional Administrator - NRC Region III g~as

NRC Docket No: 50-295 50-304.

ZION NUCLEAR POWER STATION UNITS I and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2009 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Zion Nuclear Power Station Zion, IL 60099 May 2010

Table Of Contents

1. Sum m ary and Conclusions ......................................................................................... 1 II. Intro d uctio n ..................................................................................................................... 3 A. Objectives of the REMP .................................................................................. 3 B. Im plementation of the Objectives ................................................................... 3 III. Program Description ................................................................................................. 3 A. Sample Collection .......................................................................................... 3 B. Sample Analysis ............................................................................................. 5 C. Data Interpretation .......................................................................................... 5 D. Program Exceptions ....................................................................................... 6 E. Program Changes ........................................................................................... 7 IV. Results and Discussion ............................................................................................ 7 A. Aquatic Environm ent ..................................................................................... 7

1. Public W ater ......................................................................................... 7 2 . F is h ...................................................................................................... ..8 3 . S e d im e n t .............................................................................................. . .8 B. Atmospheric Environment .............................................................................. 8

1. Airborne .............................................................................................. 8

a. Air Particulates .......................................................................... 8 C. Am bient Gam ma Radiation ............................................................................ 9 D. Land Use Survey .............................................................................................. 9 E. Summary of Results - Inter-laboratory Comparison Program ...................... 10

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Quarterly and Annual Summaries for the Zion Nuclear Power Station, 2009 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distarne and Direction, Zion Nuclear Power Station, 2009 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2009 Figures Figure B-i: Inner Ring TLD Locations and Fixed Air Samplers of the Zion Nuclear Power Station, 2009 Figure B-2: Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2009 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, 2009 Table C-1.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

Table C-1.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

Table C-11.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

Table C-I11.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

ii

Table C-IV.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

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, 2009.

Concentrations of Gamma Emitters in Air Particulate Samples Table C-IV.3 Collected in the Vicinity of Zion Nuclear Power Station, 2009.

Table C-V.1 Quarterly TLD Results for Zion Nuclear Power Station, 2009.

Table C-V.2 Mean Quarterly TLD Results for the Inner and Other Locations for Zion Nuclear Power Station, 2009.

Table C-V.3 Summary of the Ambient Dosimetry Program for Zion Nuclear Power Station, 2009.

Figures Figure C-1 Public Water - Gross Beta - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2009.

Figure C-2 Public Water - Gross Beta - Stations Z-1 6 and Z-1 8 Collected in the Vicinity of ZNPS, 2000 - 2009.

Figure C-3 Public Water - Tritium - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 -. 2009.

Figure C-4 Public Water - Tritium - Stations Z-16 and Z-18 Collected in the Vicinity of ZNPS, 2000 - 2009.

Figure C-5 Air Particulates - Gross Beta - Stations Z-01 and Z-02 Collected in the Vicinity of ZNPS, 2000 - 2009.

Figure C-6 Air Particulate - Gross Beta - Station Z-03 Collected in the Vicinity of ZNPS, 2000 - 2009.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2009 iii

Table D-4 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2009 Table D-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2009 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Annual Radiological 'Groundwater Protection Program Report (ARGPPR) iv

Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the Zion Nuclear Power Station (ZNPS) by Exelon covers the period 1 January 2009 through 31 December 2009. During that time period, 432 analyses were performed on 356 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.

Fish (commercially and recreationally important species) and sediment samples were analyzed for concentrations of gamma emitting nuclides. Cs-137 activity was detected in fish. No Cs-1 37 was detected in sediment samples. No plant produced fissiofl or activation products were found in 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. Levels detected were consistent with those observed in previous years.

Intentionally left blank II, Introduction The Zion Nuclear Power Station (ZNPS), consisting of two 1100 MWt pressurized water reactor owned and operated by Exelon Gorporation, 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 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), Global Dosimetry, and Environmental Inc. (Midwest Labs) on samples collected during the period 1 January 2009 through 31 December 2009.

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

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

2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.

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

1. Identifying significant exposure pathways.

2. Establishing baseline radiological data of media within those pathways.

3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment.

III. Program Description A. Sample Collection Samples for the ZNPS REMP were collected for Exelon Nuclear 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 2009. 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 comprising the flesh of lake trout, and burbot were collected semiannually at two locations, Z-26 and Z-27, both Control locations. 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 three locations (Z-01, Z-02 and Z-03). No control location was required. 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.

Ambient Gamma Radiation Direct radiation measurements were made using 2 CaF 200 and 2 LiF 100 LiF 4-chip Harshaw thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLD locations were placed on and around the ZNPS site at the following loations:

Z-101, Z-102, Z-103, Z-104, Z-105, Z-106, Z-107, Z-108, Z-110, Z-111, Z-112, Z-113, Z-114, Z-115, Z-301, Z-01, Z-02 and Z-03.

No control location was required..

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 sight of the vents (where practical);

4. And near the closest dwelling to the vents in the prevailing downwind direction.

(Two TLDs - each comprised of two CaF 2 200 and 2 LiF 100 LiF 4-chip thermoluminescent phosphors enclosed in plastic - were placed at each location in a PVC conduit located approximately four to eight feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.

B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the ZNPS REMP in 2009. 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:

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

2. Concentrations of gamma emitters in public water, air particulates, fish and sediment.

3. Concentrations of tritium in public water.

4. Ambient gamma radiation levels at various site environs.

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 were compared to previous years' operational data for consistency, and trending. Several factors were important in the interpretation of the data:

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

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

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

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

For public water, 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 2009 the ZNPS REMP had a sample recovery rate in excess of 99%.

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 There were no sample anomalies in 2009.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date There were no missed samples for 2009.

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.

E. Program Changes There were no changes to the REMP program in 2009.

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 (Table C-I.1, Appendix C). The values ranged from 2.47 pCi/I to 6.0 pCi/I. Concentrations detected were consistent with those detected in previous years (Figures C-1 and C-2, Appendix C).

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 (Table C-1.3, Appendix C). No nuclides were detected and all required LLDs were met.

2. Fish Fish samples comprise~d of 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 (Table C-11.1, Appendix C).

Cs-1 37 was detected in three of six samples. The concentrations ranged from 48 to 110 pCi/L No other nuclides were detected and all required LLDs were met.

3. Sediment Aquatic sediment samples were collected-at one location (Z-25) semiannually. The following analysis was performed:

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

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from three

, locations on a weekly basis. The three locations were within the ZNPS site boundary (Z-01, Z-02 and Z.03). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-IV.1 and C-IV.2, Appendix C).

Detectable gross beta activity was observed at all locations.

Comparison of results among the three groups aid in determining the effects, if any, resulting from the operation of ZNPS. The results from the On-Site locations ranged from 7 E-3 pCi/m 3 to 34 E-3 pCi/m 3 with a mean of 18 E-3 pCi/m 3 . Comparison of the 2009 air particulate data with previous years data indicate no effects from the operation of ZNPS. Concentrations detected were consistent with those detected in previous years.

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-IV.3, Appendix C).

No nuclides were detected and all required LLDs were met.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Harshaw (CaF and LiF) thermoluminescent dosimeters. Thirty-six TLD locations were established around the site. Results of TLD measurements are listed in Tables C-V.1 to C-V.3, Appendix C.

Most TLD measurements were below 20 mR/quarter, with a range of 15 mR/quarter to 27 mR/quarter.

D, Land Use Survey A Land Use Survey conducted during August 2009 around the Zion Nuclear Power Station (ZNPS) was performed by Environmental Inc.

(Midwest Labs) for Exelon Nuclear 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 1/2 degree sectors around the site. There were no changes required to the ZNPS REMP, as a result of this survey. The results of this survey are summarized below.

Distance in Miles from the ZNPS Reactor Buildings Sector .- Residence Livestock Milk Farm Miles Miles Miles AN 2.5 B NNE -

CNE D ENE EE F ESE G SE H SSE JS K SSW 1.9 L SW 1.1 M WSW 1.0 NW 1.1 P WNW 1.0 Q MW 1.0 R NNW 1.3 E. Summary of Results - Inter-Laboratory Comparison Program The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for (Appendix D). The PE samples, supplied by Analytics Inc., Environmental Resource Associates (ERA) and DOE's 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 laboratory results and Analytics' known value. Since flag values are not assigned by Analytics,. TBE-ES evaluates the reported ratios based on internal QC requirements, which are based on the DOE MAPEP criteria.

2. ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, NELAC, state specific PT program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEP's evaluation report provides an acceptance range with associated flag values.

The MAPEP defines three levels of performance: Acceptable (flag = "A"), Acceptable with Warning (flag = "W"), and Not Acceptable (flag = "N"). Performance is considered acceptable when a mean result for the specified analyte is +/- 20% of the reference value. Performance is acceptable with warning when a mean result falls in the range from +/-20% to +/-30% of the reference value (i.e., 20% < bias < 30%). If the bias is greater than 30%, the results are deemed not acceptable.

For the primary laboratory, 17 out of 18 analytes met the specified acceptance criteria. One sample did not meet the specified acceptance criteria for the following reason:

1. Teledyne Brown Engineering's Analytics June 2009 Zn-65 in AP result of 137 pCi/L was higher than the known value of 101 pCi/L, resulting in a found to known ratio of 1.36. NCR 09-23 was initiated to investigate this failure. The failure appears to be a result of a slightly high bias on Detector 7. A recount on Detector 17 resulted in a Zn-65 result of 101 pCi/L. The detector has been tagged out-of-service until a recalibration can be performed.

Detector 7 is not used for client samples.

For the secondary laboratory, Environmental, Inc., 11 out of 14 analytes met the specified acceptance criteria. Four samples did not meet the specified acceptance criteria for following reasons:

1. Environmental Inc.'s ERA April 2009 Cs-1 37 in water result of 147.7.pCi/L exceeded the lower control limit of 151.0 pCi/L. All gamma emitters showed a low bias. A large plastic burr found on the base of the Marinelli kept the beaker from sitting directly on the detector. Recounting in a different beaker gave an acceptable result of 155.33 +/- 14.55 pCi/L.

2. Environmental Inc.'s ERA April 2009 H-3 in water result of 22819 pCi/L exceeded the upper control limit of 22300 pCi/L. A recount of the original vials averaged 23,009 pCi/L. Reanalysis results were acceptable at 19,170 pCi/L. No cause could be found for the failure.

-11 -

3. Environmental Inc.'s MAPEP January 2009 Sr-90 in AP result of 0.93 exceeded the upper control limit of 0.83. Reanalysis results were acceptable at 0.54 +/- 0.12 Bq/filter. No cause could be found for the failure.

4. Environmental Inc.'s MAPEP July 2009 Sr-90 in soil result of 310.5 Bq/kg exceeded the lower control limit of 319 Bq/kg. Reanalysis results were acceptable at 363.3 Bq/kg. Incomplete separation of strontium from calcium could result in a higher recovery percentage and consequently lower reported activity.

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

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (NI)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER GR-B 48 4 3.4 3.3 3.6 Z-15 INDICATOR 0 (PCI/LITER) (13/24) (15/24) (8/12) LAKE COUNTY WATER WORKS (2.4/6.0) (2.5/4.5) (3.0/6.0) 1.4 MILES NNW OF SITE H-3 16 200 <LLD <LLD 0 GAMMA 48 MN-54 15 <LLD <LLD 0 CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD 0 ZN-65 30 <LLD <LLD 0 NB-95 15 <LLD <LLD 0

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS JS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER ZR-95 30 <LLD <LLD 0 (PCI/LITER)

CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 60 <LLD <LLD LA-140 15 <LLD <LLD FISH GAMMA 6 (PCI/KG WET) MN-54 130 <LLD NA 0 CO-58 130 <LLD NA 0 FE-59 260 <LLD NA

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH CO-60 130 <LLD NA 0 (PCI/KG WET)

ZN-65 260, <LLD NA 0 NB-95 NA <LLD NA 01 ZR-95 NA <LLD NA 0 CS-134 100 <LLD NA 0 CS-137 100 86 NA 86 Z-27 INDICATOR 0 (3/6) (3/4) LAKE MICHIGAN FARSITE (48/110) (48/I 10) 10.1 MILES N OF SITE BA-140 NA <LLD NA 0 LA-140 NA <LLD NA 0

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR. CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (ML)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASU REMENTS SEDIMENT GAMMA 2 (PCI/KG DRY) MN-54 NA <LLD NA 0 CO-58 NA <LLD NA 0 FE-59 NA <LLD NA 0 CO-60 NA <LLD NA 0 ZN-65 NA <LLD NA 0 NB-95 NA <LLD NA ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN {M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT CS-137 180 <LLD NA 0 (PCI/KG DRY)

BA-140 NA <LLD NA 0 LA-140 NA <LLD NA 0 AIR PARTICULATE GR-B 156 10 18 NA 18 Z-01 INDICATOR 0 (E-3 PCI/CU.METER) (156/156) (52/52) ONSITE I (7/34) (8/34) 0.3 MILES S OF SITE GAMMA 12 MN-54 NA <LLD NA *0 CO-58 tJA <LLD NA 0 FE-59 NA <LLD NA 0 CO-60 NA <LLD NA 0

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2009 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD: ANNUAL 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE ZN-65 NA <LLD NA 0 (E-3 PCI!CU.METER)

NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA 0 CS-134 10 <LLD NA 0 CS-137 10 <LLD NA 0 BA-140 NA <LLD NA 0 LA-140 NA <LLD NA 0 DIRECT RADIATION TLD-QUARTERLY 144 NA 19.2 NA 22.3 Z-301-1 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (144/144) (4/4)

(15/27) (20/25) 0.5 MILES NW

• THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

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

TABLE! B-!: -, Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2009 Location I,' 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 miles W Z-03 Onsite 3 (indicator) 0.2 miles NNW 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 0.2 miles S (indicator)

E. 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-110-1 and-2 0.2 miles SSW Z-111-1 and -2 0.3 miles SW Z-112-1 and -2 0.7 miles WSW Z-113-1 and -2 0.6 miles W Z-114-1 and -2 0.6 miles WNW Z-115-1 and -2 0.4 miles NW Z-301-1 and -2 0.5 miles NW Other Z-01-1 and -2 Onsite 1 (indicator) 0.3 miles S Z-02-1 and -2 Onsite 2 (indicator) 0.2 miles W Z-03-1 and -2 Onsite 3 (indicator) 0.2 miles NNW B-1

T-ABLE B-2: Radiological Environmental'Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2009 Sample Analysis Sampling Method Analytical Procedure Number Medium Public Gamma Monthly composite from TBE, TBE-2007 Gamnla emitting radioisotope Water Spectroscopy weekly grab samples. analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Public Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta Water weekly grab samples. activity in various matrices Env. Inc., W(DS)-01 Determination of gross alpha and/or gross beta in water (dissolved solids or total residue)

Public Tritium Quarterly composite from TBE, TBE-201 1 Tritium analysis in drinking water by Water weekly grab samples. liquid scintillation Env. Inc., T-02 Determination of tritium in water (direct method)

Fish Gamma Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via electroshocking or other techniques Env. Inc., GS-01 Determination of gamma emitters

-- __by gamma spectroscopy Sediment Gamma Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope Spectroscopy analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Gross Beta One-week composite of TBE, TBE-2008 Gross Alpha and/or gross beta Particulates continuous air sampling activity in various matrices through glass fiber filteý paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Gamma Quarterly composite of each TBE, TBE-2007 Gamma emitting radioisotope Particulates Spectroscopy station analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy TLD Thermoluminescence Quarterly TLDs comprised of Global Dosimetry Dosimetry two CaF 200 and two LiF 100 LiF 4-chip Harshaw elements.

B-2

• TLD MoMtIng LOLnion on Swstionf IWar RiaS TLIP Locadwis and ram As ir q~t A Air $amnwlng LO#r

~-1OinNo. I sokitideid

~~2QnwNq 4 2 Westsi4 O3OnW1 3 Nuriisdc Figure B-1

k. , I Inner Ring TLD Locatiorns;ad Fixed Air Samplers of the Zion Nuclear Power Station, 2009 B-3

zm I R ~~~rt Wtr~~~

IZ-'4-6 Mkvhp,:fon L4 Mrig, Figure B-2 Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2009 B-4

APPENDIX C DATA TABLES PRIMARY LABORATORY

TABLE C-I.1 '.CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES

'COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Z-14 Z-15 Z-1 6 Z-18 '

r PERIOD 01/07/09 - 01/28/09 3.9 +/- 1.6 3.5 +/- 1.6 3.5 +/- 1.6 3.9 +/- 1.6 02/04/09 -02/25/09 3.5 +/- 1.8 <2.5 <2.4 <2.4 03/04/09 - 03/25/09 <2.1 3.3 +/- 1.6 2.6 +/- 1.5 2.5 +/- 1.5 04/01/09 - 04/29/09 3.4 +/- 1.8 3.9 +/- 1.8 3.7 +/- 1.8 4.5 +/- 1.9 05/06/09 - 05/27/09 <2.4 <2.3 2.4 +/- 1.6 3.4 +/- 1.7 06/03/09 - 06/24/09 2.9 +/- 1.5 3.0 +/- 1.5 <3.6 4.0 +/- 1.7 07/01/09 - 07/29/09 <2.8 <2.7 <2.7 <2.9 08/05/09 - 08/26/09 <2.5 6.0 +/- 1.9 <2.9 3.4 +/- 1.9 09/02/09 - 09/30/09 <2.6 <2.6 <2.6 <2.6 10/07/09 - 10/28/09 <2.4 3.2 +/- 1.7 <2.5 3.2 +/- 1.8 11/04/09 11/25/09 2.8 +/- 1.7 3.2 +/- 1.7 <2.4 3.4 +/- 1.7 12/02/09 - 12/30/09 2.6 +/- 1.5 3.1 +/- 1.6 3.1 +/- 1.6 2.9 +/- 1.6 MEAN 3.2 +/- 1.0 3.6 +/- 2.0 3.0 +/- 1.1 3.5 +/- 1.2 TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Z-14 Z-1 5 Z-16 Z-18 PERIOD 01/07/09 - 03/25/09 178

• 169

• 174 < 179 04/01/09 - 06/24/09 187

• 186

• 174 < 187 07/01/09 - 09/30/09 169

• 170

• 175 < 170 10/07/09 - 12/30/09 160

• 161

• 161 < 162 MEAN

• THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVES VALUES C-1

TABLE C-1.3 CONCENTRATIONS OF GAMMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD Z-14 01/07/09 - 01/28/ 09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 22 <6 -6 02/04/09 - 02/25//09 <1 <1 <3 <1 <2 <1 <-3 <1 <1 < 13 <4 03/04/09 - 03/25//09 <1 <2 <4 <1 <2 <2 <3 <1 <1 < 27 <9 04/01/09 - 04/29/'09 <2 <2 <5 <2 <4 <2 k4 <2 <2 < 43 < 13 05/06/09 - 05/27/'09 <2 <2 <6 <2 <4 <3 <4 <2 <2 < 27 <9 06/03/09 - 06/24/'09 <2 <2 <4 <2 <3 <2 <3 <1 <2 < 17 <6 07/01/09 - 07/29/'09 <3 <3 <8 <2 <6 <4 <5 <3 <2 < 54 < 18 08/05/09 - 08/26/'09 <6 <6 < 19 <6 < 14 <7 < 11 <6 <6 < 101 < 27 09/02/09 - 09/30f'09 <5 <6 < 12 <5 < 11 <6 < 10 <5 <5 < 71 < 22 10/07/09 - 10/28,/09 <2 <2 <4 <2 <4 <2 <3 <2 <2 < 13 < 4 11/04/09 - 11/25 /09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 22 <7 12/02/09 - 12/30,/09 <5 <5 < 15 <7 < 11 <7 < 12 <5 <5 < 50 < 22 MEAN Z-15 01/07/09 01/28/09 <2 <2 <4 <2 <4 <2 <4 <2 <2 < 20 <6 02/04/09 02/25/09 <2 <2 <4 <1 <3 <2 <3 <1 <2 < 15 <5 03/04/09 03/25/09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 39 < 14 04/01/09 04/29/09 <2 <2 <5 <2 <4 <2 <4 <1 <2 < 34 < 13 05/06/09 05/27/09 <1 <2 <4 <1 <3 <2 <3 <1 <2 < 22 <6 06/03/09 06/24/09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 22 <7 07/01/09 07/29/09 <3 <4 <9 <3 <6 <5 <7 <3 <3 < 48 < 16 08/05/09 08/26/09 <5 <7 < 15 <7 < 14 <8 < 14 <5 <6 < 86 < 37 09/02/09 09/30/09 <4 <6 < 12 <5 < 10 <6 <8 <4 <4 < 63 < 23 10/07/09 10/28/09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 16 15-11/04/09 11/25/09 <1 <2 <4 <1 <3 <2 <3 <1 <2 < 19 <6 12/02/09 12/30/09 <5 <8 < 18 <9 < 16 <9 < 15 <6 <6 < 84 < 23 MEAN

i TABLE C-1.3 CONCENTRATIONS OF GAMMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED INTHE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 , Ba-140 La-140 PERIOD Z-16 01/07/09 - 01/28 /09 <2 <2 <5 <2 <3 <2 <4 <2 <2 < 18 <6 02/04/09 - 02/25 /09 <2 <2 <4 <2 <4 <2 <4 <2 <2 < 18 <5 03/04/09 - 03/25./09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 39 < 14 04/01/09 ,- 04/29 /09 <2 <2 <6 <2 <4 <2 <4 <2 <2 < 44 < 13 05/06/09 - 05/27/709 <1 <1 <3 <1 <3 <1 <2 <1 <1 < 15 <6 06/03/09 - 06/24 /09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 20 <7 07/01/09 - 07/29 /09 <2 <2 <5 <2 <4 <2 <3 <2 <2 <21 <9 08/05/09 - 08/26./09 <6 <7 < 18 <8 < 14 < 10 < 14 <5 <6 < 88 < 31 09/02/09 - 09/30./09 <4 <5 < 10 <4 <7 <5 <9 <4 <4

• 60

• 20 10/07/09 - 10/28./09 <2 <2 <5 <2 < 4 <2 <4 <2 <2 <16. <4 11/04/09 - 11/25,/09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 24 <8 12/02/09 - 12/30,/09 <5 <7 <12 <8 < 13 <8 < 15 <4 <6 < 65 < 20 a MEAN Z-18 01/07/09 01/28/09 <1 <2 <4 <1 <3 <2 <3 <1 <1 < 16 <4 02/04/09 02/25/09 <2 <2 <5 <2 <4 <2 <4 <2 <2

• 20 <6 03/04/09 03/25/09 <1 <2 <4 <1 <3 <2 <3 <1 <1 < 34 < 10 04/01/09 04/29/09 <1 <2 <4 <1 <3 <2 <3 <1 <1 < 33 < 9 05/06/09 05/27/09 <2 <2 <4 <2 <3 <2 <3 <2 <2 < 22 <7 06/03/09 06/24/09 <2 <2 <5 <2 <3 <2 <4 <2 <2

• 20. < .7 07/01/09 07/29/09 <1 <1 <6 <1 <3 <2 <4 <2 <2 <21 08/05/09 08/26/09 <6 <6 < 16 <4 < 14 <7 < 13 <5 <6

• 80 < 24 09/02/09 09/30/09 <4 <6 < 13 <5 <9 <5 < 11 <5 <5 < 64 < 17 10/07/09 10/28/09 '< 2 <2 <4 <<2 <3 <2 <3 <2 <2 <13 <4 11/04/09 11/25/09 <1 <2 <4 <1 <3 <2 <3 <1 <1 <17 <5 12/02/09 12/30/09 <6 <6 < 14 <7 <11 <7 <14 <5 <6 < 68 <18 MEAN

TABLE C-I1.1 CONCENTRATIONS OF GAMMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEARPOWER STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD Z-26 Lake Trout 05/20/09 < 71 < 67 < 235 < 59 < 140 < 84 < 125 < 54 < 53 < 2850 < 784 Lake Trout 10/21/09 < 54 < 80 < 173 < 81 < 107 < 83 < 145 < 74 < 74 < 915 < 278 MEAN Z-27 Burbot 05/05/09 < 52 < 58 < 184 < 49 < 119 < 63 < 130 < 51 < 51 < 1420 < 522 Lake Trout 05/05/09 < 39 < 49 < 157 < 47 < 87 < 60 < 100 < 43 48 +/- 25 < 1220 < 412 Burbot 10/21/09 < 38 < 53 < 125 < 50 < 104 < 61 < 94 < 43 110 +/- 47 < 579 < 140 Lake Trout 10/21/09 < 59 < 64 < 139 < 51 < 134 < 65 < 132 < 49 99 +/- 50 < 752 < 330 0)

MEAN 86 +/- 66 I

• THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVES VALUES

I TABLE C-II1.1 CONCENTRATIONS OF GAMMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD Z-25 05/20/09 < 27 < 29 < 81 < 33 < 59 < 34 < 53 < 26 < 28 < 267 < 85 10/21/09 < 26 < 36 < 84 < 27 < 67 < 38 < 55 < 24 < 31 < 359 < 122 MEAN I

TABLE C-IV.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I PERIOD Z-0 1 Z-02 Z-03 12~/30/08 - 1/0[/09 31 + 5 28 +/- 5 29 +/-5 01/07/09 -01/13/09 27 +/- 5 29 +/- 5 28 +/-5 01/13/09 -01/21/09 22 + 4 24 +/- 4 25 +/-4 01/21/09 -01/28/09 30 +/-5 31 +/- 5 28 +/-5 01/28/09 -02/04/09 20 +/-4 22 +/- 4 23 +/-4 02/04/09 -02/11/09 28 5 29 +/- 5 27 +/-5 02/11/09 -02/18/09 19 +/-4 20 +/- 4 18 +/-4 02/18/09 -02/25/09 22 +/-5 22 +/- 5 24 +/-5 02/25/09 -03/04/09 27 +/-5 24 +/- 5 24 +/-5 03/04/09 -03/11/09 22 +/-4 22 +/- 4 22 +/-4 03/11/09 -03/18/09 26 +/-5 25 +/- 5 27 +/-5 03/18/09 -03/25/09 18 +/-4 17 +/- 4 19 +/-4 03125109 -04/01/09 11 +/-4 13 +/- 4 12 +/-4 04/01/09 -04/08/09 12 +/-4 15 +/- 4 12 +/-4 04/08/09 -04/15/09 15 +/-4 19 +/- 4 17 +/- 4 04/15/09 -04/22/09 11 +/-4 10 +/- 4 13 +/- 4 04/22/09 -04/29/09 13 +/-3 13 +/- 3 11 +/-3 04/29/09 -05/06/09 17 +/-4 19 +/-4 16 +/-4 05/06/09 -05/13/09 15 +/-4 13 +/-4 14 +/-4 05/13/09 -05/20/09 11 +/-4 14 +/-4 12 +/-4 05/20/09 -05/27/09 19 +/-4 12 +/-4 20 +/-4 05/27/09 -06/03/09 9+/-4 9+/-3 11 +/-4 06/03/09 -06/10/09 8+/-3 7+/-3 9+/-4 06/10/09 -06/17/09 12 +/-4 12 +/- 4 12 +/-4 06/17/09 -06/24/09 22 +/-7 17 +/- 6 30 +/-7 06/24/09 -07/01/09 17 +/-4 15 +/- 4 13 +/-4 07/01/09 -07/08/09 11 +/-4 10 +/- 4 9+/-4 07/08/09 -07/15/09 13 +/-4 10 +/- 4 11 +/-4 07/15/09 -07/22/09 13 +/-4 10 +/- 4 8+/-4 07/22/09 -07/29/09 21 +/-4 18 +/- 4 14 +/-4 07/29/09 -08/05/09 20 +/-4 17 +/- 4 20 +/-4 08/05/09 -08/12/09 17 +/-4 17 +/- 4 16 +/-4 08/12/09 -08/19/09 22 +/-5 24 +/-5 19 +/-4 08/19/09 -08/26/09 11 +/-4 11 +/-4 8+/-4 08/26/09 -09/02/09 9+/-4 9+/-4 14 +/- 4 09/02/09 -09/09(09 26 +/-5 28 +/-5 27 +/- 5 09/09/09 -09/17/09 26 +/-5 26 +/-5 26 +/- 5 09/17/09 -09/23/09 19 +/-5 15 +/-5 12 +/- 5 09/23/09 -09/30/09 16 + 4 14 +/-4 14 +/- 4 09/30/09 -10/07/09 8+/-4 8+/-4 8+/-4 10/07/09 -10/14/09 9+/-4 ,12 +/-4 16 +/-4 10/14/09 -10/21/09 15 +/-4 14 +/-4 18 +/-4 10/21/09 -10/28/09 13 +/- 4 12 +/-4 14 +/-4 10/28/09 -11/04/09 19 +/-4 20 +/-4 21 +/-4 11/04/09 -11/11/09 27 +/-5 30 +/- 5 23 +/-5 11/11/09 -11/18/09 18 +/-5 18 +/-5 17 +/-4 11/1 8/0 9 -11/25/09 29 +/-4 26 +/-4 29 +/-4 11/25/09 -12/02/09 18 +/-5 19 +/-5 14 + 4 12/02/09 -12/10/09 16 +/-4 15 + 4 15 +/-4 12/10/09 -12/16/09 34 + 5 31 +/- 5 30 5 12/16/09 -12/23/09 23 +/-5 27 +/- 6 24 +/-5 12/23/09 -12/30/09 20 +/-5 24 +/- 5 19 +/-5 MEAN 18 +/-13 18 +/-14 18 +/-13

• THE MEAN AND 2 STANDARD DEVIATION ARE CALCULATED USING THE POSITIVES VALUES C-6

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, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - ONSITE LOCATIONS COLLECTION MIN MAX MEAN+

PERIOD 2SD 12/30/08 - 01/28/09 22 31 28 +5 01/28/09 - 02/25/09 18 29 23 +/- 7 02/25/09 - 04/01/O0 11 27 20 +/- 11 04/01/09 - 04/29/09 10 19 13 +/- 5 04/29/09 - 06/03/09 9 20 14 +/- 7 06/03/09 - 07/01/09 7 30 14 +/- 13 07/01/09 - 07/29/09 8 21 12 +/- 8 07/29/09 - 09/02/09 8 24 16 +/- 10 09/02/09 - 09/30/09 12 28 21 +/- 13 09/30/09 - 10/28/09 8 18 12+/- 6 10/28/09 - 12/02/09 14 30 22 +/- 10 12/02/09 - 12/30/09 15 34 23 + 13 12/30/08 - 12/30/09 7 34 18 +/- 13 i

TABLE C-IV.3 CONCENTRATIONS OF GAMMA EMITTERS INAIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD Z-01 12/30/08 - 04/01/09 <3 <5 < 13 <2 <8 <6 <9 <3 <3 < 214 < 113 04/01/09 - 07/01/09 <3 <6 < 23 <3 < 11 <7 < 12 <4 <3 < 593 < 238 07/01/09 - 09/30/09 <3 <4 < 14 <3 <7 <.3 <11 < 2 <2 < 569 < 164 09130109 - 12/30109 <3 <4 <7 <3 < 10 <4 <6 <4 <3 < 63 < 23 MEAN Z-02 12/30/08 - 04/01/09 <2 <4 <8 <3 <6 <5 <6 <3 <2 < 136

• 36 04/01/09 - 07/01/09 <5 <5 < 17 <4 < 11 <8 < 14 <5 <4 < 686 < 268 07/01/09 - 09/30/09 <3 <5 < 22 <3 < 10 <7 < 12 <4 <3 < 862 < 179 09/30/09 - 12/30/09 <2 <3 <9 <3 <6 <4 <6 <.3 <3 < 65 < 25 MEAN 00 Z-03 12/30/08 - 04/01/09 <4 <4 < 15 <3 <7 <5 < 10 <4 <3 < 241 < 74 04/01/09 - 07/01/09 <5 <7 < 16 <6 < 13 <8 < 15 <5 <3 < 780 < 277 07/01(09 - 09/30/09 <3 <4 < 15 <3 <8 <6 <9 <3 <3 < 625 < 169 09/30/09 - 12/30/09 <4 <4 <8 <5 <8 <3 <7 <5 <5 < 71 < 15 MEAN I

TABLE C-V.t QUARTERLY TLD RESULTS FOR ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROETGEN/QUARTER +/-2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE 2 S.D.

Z-01-1 18.5 +/- 6.2 23 16 .. 18 17 Z-01-2 19.0 +/- 6.9 24 16 18 18 Z-02-1 18.0 +/- 9.4 25 16 15 16 Z-02-2 17.3 +/- 6.4 22 15 16 16 Z-03-1 17.8 +/- 5.7 22 16 16 17 Z-03-2 18.8 +/- 6.2 23 16 17 19 Z-101-1 18.5 +/- 5.0 22 16 18 18 Z-101-2 19.0 +/- 3.3 21 19 17 19 Z-102-1 20.8 +/- 4.7 24 19 21 19 Z-102-2 20.3 +/- 6.0 24 17 21 19 Z-103-1 19.3 +/- 4.4 22 18 17 20 Z-103-2 20.0 +/- 5.4 24 18 19 19 Z-104-1 18.3 +/- 6.4 23 16 17 17 Z-104-2 18.5 +/- 6.0 23 17 17 17 Z-105-1 18.8 +/- 5.5 22 16 17 20 Z-105-2 17.8 +/- 6.0 22 15 17 17 Z-106-1 79.5 +/- 5.3 23 17 18 '20 Z-106-2 19.3 +/- 5.0 23 18 18 18 Z-107-1 18.0 +/- 5.4 22 16 17 17 Z-107-2 18.5 +/- 5.8 22 15 19 18 Z-108-1 19.0 +/- 4.0 22 18 18 18 Z-108-2 18.5 +/- 6.2 23 16 17 18 Z-110-1 18.5 +/- 6.2 23 16 17 18 Z-110-2 18.5 +/- 6.0 23 17 17 17 Z-111-1 18.8 +/- 4.7 22 19 17 17.

Z-111-2 18.8 +/- 4.4 22 18 17 18 Z-112-1 21.3 +/- 6.6 25 17 22. 21 Z-112-2 20.5 +/- 3.5 23 20 19 20 Z-113-1 18.8 +/- 4.4 22 17 18 18 Z-113-2 18.3 +/- 6.4 23 16 17 17 Z-114-1 20.3 +/- 3.8 23 19 20 19 Z-114-2 20.0 +/- 4.9 23 18 21 18 Z-115-1 20.8 +/- 5.0 24 18 20 21 Z-115-2 18.8 +/- 4.4 22 18 17 18 Z-301-1 22.3 +/- 4.4 25 20 23 21 Z-301-2 22.0 +/- 6.7 27 20 20 21 C-9

TABLE C-V.2 MEAN QUARTERLY TLD RESULTS FOR INNER RING AND OTHER LOCATIONS FOR ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OTHER PERIOD +/- 2 S.D.

JAN-MAR 23.0 +/- 2.4 23.2 +/- 2.3 APR-JUN 17.5 +/- 2.9 15.8 +/- 0.8 JUL-SEP 18.4 +/- 3.5 16.7 +/- 2.4 OCT-DEC 18.6 +/- 2.7 17.2 +/- 2.3 TABLE C-V.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR ZION NUCLEAR POWER STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION *SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 120 15 27 19.4 +/- 5.1 OTHER 24 15 25 18.2 +/- 6.2 INNER RING STATIONS - Z-101-1, Z-101-2, Z-102-1, Z-102-2, Z-103-1, Z-103-2, Z-104-1, Z-104-2, Z-105-1, Z-105-2, Z-106-1, Z-106-2, Z-107-1, Z-107-2, Z-108-1, Z-108-2, Z-110-1, Z-110-2, Z-111-1, Z-111-2, Z-112-1, Z-112-2, Z-113-1, Z-113-2, Z-114-1, Z-114-2, Z-115-1, Z-115-2, Z-301-1, Z-301-2 OTHER STATIONS - Z-01-1, Z-01-2, Z-02-1, Z-02-2, Z-03-1, Z-03-2 C-10

FMGURE C-i PUBLIC WATER - GROSS BETA - STATlONS Z-14 AND Z=15 COLLECTED ýN THE VICMNITY OF ZNPS, 20002004

.Z=14 Ke*n osha Water Works llvlýo

!9 YZ, Q-2o1--

12-31-01 2les1-0.2 Z-1 5 Lake County Water Works 1~Q

,8~o.

-iý ra 2.*0 al-b"o ti-ol I &1 12,31,02 12,31-403, ao4-s C-11

FIGURE C-1 (cont.)

PUBLIC WATER = GROSS BETA - STATIONS Zo14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2009 Z-14 (C) Kenosha Water Works 5.0 4.0 3.0

,-J U.

2.0 1.0 0.0 -

01-01-05 01-01-06 01-01-07 01-01-08 12-31-08 12-31-09 Z-1 5 Lake County Water Works 7.0 6.0 5.0 4.0 L)

C. 3.0 2.0 1.0 0.0 -

01-01-05 01-01-06 01-01-07 01-01-08 12-31-08 12-31-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-12

FMGURE C=2 PUBLIC WATER - GROSS BETA - STATDONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 =2004 Z-1,6 Wauhogan Water Wor ks 110 A01 OAZI,0 12ý31ýM 11"1 .01, 12.3ia=

Z Lake, Foirest Wate~r' Wrks, to0 0 A.--,O~

12fr1 I 2l-03~

9ý30ý1,14 C-13

FIGURE C-2 (cont.)

PUBUCMWATER - GROSS BETA - STATIONS Z=16 AND Z-18 COLLECTED INTHE VICINITY OF ZNPS, 2005 - 2009 Z-16 Waukegan Water Works 10.0 9.0 8.0 7.0 6.0

-4 03 5.0 Q:.

4.0 3.0 2.0 1.0 0.0 01-01-05 01-01-06 01-01-07 01-01-08 12-31-08 12-31-09 Z-18 (C) Lake Forest Water Works 10.0 9.0 8.0 7.0 6.0

-J C-. 5.0 4.0 3.0 2.0 1.0 0.0 01-01-05 01-01-06 01-01-07 01-01-08 12-31-08 12-31-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-14

FIGURE C-3 PUBLIC WATER - TRITIUM - STATION Z-14 AND Z=15 COLLECTED IN THE VICINDTY OF ZNPS, 2000 - 2004 Z-414 (C) Kenosha W.aer Work's 2i00 elr~l Z41 5 Lake County Water Works SOD 4001~

300D lo '

100' ~

C-15

FIGURE C-3 (cont.)

PUBLIC WATER - TRITIUM - STATION Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2009 Z-14 (C) Kenosha Water Works 300 T 200 4

._1 C) 100 +

0 -

03-31-05 03-13-06 02-23-07 02-05-08 01-17-09 12-30-09 Z-15 Lake County Water Works 300 T 250 +

200

-J 150 +

100 +

50 -

1l I. I I I I 03-31-05 03-13-06 02-23-07 02-05-08 01-17-09 12-30-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-16

FIGURE C-4 PUBLIC WATER - TRITIUM - STATION Z=16 AND Z=18 COLLECTED IN THE VICINITY OF ZNPS,.2000 - 2004 Z-6 'Waukegan Water Works 500 300.

200 100 0

~-10! 12,13 1ýw 1Z41,ot3 -0 Z-18 (C) Lake Forest Water Works 400 200, -!,

i0

-2&J0 01 -014jlo C-17

FIGURE C-4 (cont.)

PUBLIC WATER = TRITIUM - STATION Z=16 AND Z118 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2009 Z-1 6 Waukegan Water Works 250 T 200 150+

-J C.

100 -

50 + -

0 1 a i i iI 03-31-05 03-13-06 02-23-07 02-05-08 01-17-09 12-30-09 Z-18 (C) Lake Forest Water Works 250 y 200 150+

CL 100 +

50 -

n0 I I I 03-31-05 03-13-06 02-23-07 02-05-08 01-17-09 12-30-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-18

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

TABLE D-I ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

March 2009 E6533-396 Milk Sr-89 pCi/L 102 97.7 1.04 Sr-90 pCi/L 14.9 15.6 0.96 E6534-396 Milk 1-131 pCi/L 66.7 79.3 0.84 Ce-141 pCi/L 87.5 94.9 0.92, Cr-51 pCi/L 275 305 0.90 Cs-134 pCi/L 82.0 93.7 0.88 Cs-137 pCi/L 111 111 1.00 Co-58 pCi/L 114 119 0.96 Mn-54 pCi/L 136 128 1.06 Fe-59 pCi/L 112 99.9 1.12 Zn-65 pCi/L 160 156 1.03 Co-60 pCi/L 142 142 1.00 E6536-396 AP Ce-141 pCi 120 115 1.04 Cr-51 pCi 385 371 1.04 Cs-134 pCi 113 114 0.99 Cs-137 pCi 149 135 1.10 Co-58 pCi 153 145 1.06 Mn-54 pCi 155 155 1.00 Fe-59 pCi 118 121 0.98 Zn-65 pCi 195 189 1.03 Co-60 pCi 190 173 1.10 E6535-396 Charcoal 1-131 pCi 82.8 79.4 1.04 A June 2009 E6742-396 Milk Sr-89 pCi/L 107 112 0.96 A Sr-90 pCi/L 19.0 16.7 1.14 A E6743-396 Milk 1-131 pCi/L 98.1 102.0 0.96 A Ce-141 pCi/L 260 284 0.92 A Cr-51 pCi/L 389 400 0.97 A Cs-I 34 pCi/L 144.0 166 0.87 A Cs-i 37 pCi/L 185 192 0.96 A Co-58 pCi/L 86.9 91.9 0.95 A Mn-54 pCi/L 133 137 0.97 A Fe-59 pCi/L 126 122 1.03 A Zn-65 pci/L 173 175 0.99 A Co-60 pCi/L 298 312 0.96 A E6745-396 AP Ce-141 pCi 186 163 1.14 A Cr-51 pCi 262 231 1.13 A Cs-134 pCi 101 95 1.06 A Cs-1 37 pCi 135 111 1.22 w Co-58 pCi 61 53 1.16 A Mn-54 pCi 83.1 79 1.05 A Fe-59 pCi 84 70 1.19 A Zn-65 pCi 137 101 1.36 N (1)

Co-60 pCi 202 180 1.12 A E6744-396 Charcoal 1-131 pCi 92.2 95.8 0.96 A D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAiU, TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix. Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

September 2009 E6897-396 Milk Sr-89 pCi/L 113 107 1.06 A Sr-90 pCi/L 17.4 18.8 0.93 A E6898-396 Milk 1-131 pCi/L 89.2 98.6 0.90 A Ce-141 pCi/L 249 275 0.91 A Cr-51 pCi/L 213 221 0.96 A Cs-134 pCi/L 104.0 123 0.85 A Cs-137 pCi/L 172 185 0.93 A Co-58 pCi/L 96.3 99.4 0.97 A Mn-54 pCi/L 201 206 0.98 A Fe-59 pCi/L 154 147 1.05 A Zn-65 pCi/L 213 204 1.04 A Co-60 pCi/L 154 160 0.96 A E6900-396 AP Ce-141 pgi 181 161 1.12 A Cr-51 pCi 145 130 1.12 A Cs-134 pCi 71.8 72 0.99 A Cs-137 pCi 115 109 1.06 A Co-58 pCi 62 58 1.06 A Mn-54 pCi 129 121 1.07 A Fe-59 pCi 97 98 0.98 A Zn-65 pCi 110 120 0.92 A Co-60 pCi 98.7 94.1 1.05 A E6899-396 Charcoal 1-131 pCi 89.5 92.3 0.97 A December 2009 E6946-396 Milk Sr-89 pCi/L 131 131 1.00 Sr-90 pCi/L 19.3 17.9 1.08 E6947-396 Milk 1-131 pCi/L 79.2 87.3 0.91 Ce-141 pCi/L 193 202 0.96 Cr-51 pCi/L 512 548 0.93 Cs-134 pCi/L 222 253 0.88 Cs-137 pCi/L 163 179 0.91 Co-58 pCi/L 200 211 0.95 Mn-54 pCi/L 178 178 1.00 Fe-59 pCi/L 176 178 0.99 Zn-65 pCi/L 326 345 0.94 Co-60 pCi/L 240 256 0.94 E6949-396 AP Ce-141 pCi 103 103 1.00 Cr-51 pCi 290 280 1.04 Cs-134 pCi 116 129 0.90 Cs-137 pCi 93.4 91.5 1.02 Co-58 pCi 111 108 1.03 Mn-54 pCi 81.0 90.8 0.89 Fe-59 pCi 106 90.8 1.17 Zn-65 pCi 155 176 0.88 Co-60 pei 135 131 1.03 D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix ',. Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

December 2009 E6948-396 Charcoal 1-131 pCi 93.3 93.9 0.99 A (1) Detector 7 appears to have a slightly high bias. Detector 7 was removed from service until it can be recalibrated. NCR 09-23 (a) Teledyne Brown Engineeringreported result.

(b) The Analytics known value is equal to 100% of the parameterpresent in the standardas determined by gravimetric and/or volumetric measurements made during standardpreparation.

(c) Ratio of Teledyne Brown Engineering to Analytics results.

(d) Analytics evaluation basedon TBE internal QC limits: A= Acceptable. Reported result falls within ratio limits of0.80-1.20.

W-Acceptable with warning. Reported result falls within 0. 70-0.80 or 1.20-1.30. N =Not Acceptable. Reported result falls outside the ratio limits of < 0.70 and> 1.30.

D-3

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 1)

Identification Reported Known Month/Year Number Media Nuclide Units Value (a) Value (ih) Control Limits Evaluation (c)

April 2009 RAD 77 Water Sr-89 pCi/L 57.4 48.3 37.8 - 55.7 N (1)

Sr-90 pCi/L 30.6 31.4 22.9 - 36.4 A Ba-133 pCi/L 55.2 52.7 43.4 -58.3 A Cs-134 pCi/L 65.8 72.9 59.5 - 80.2 A Cs-137 pCi/L 157 168 151 -187 A Co-60 pCi/L 86.4. 88.9 80.0 - 100 A Zn-65 pCi/L 85.5 84.4 76.0 - 101 A Gr-A pCi/L 47.7 54.2 28.3 - 67.7 A Gr-B pCi/L 45.2 43.5 29.1 - 50.8 A 1-131 pCi/L 25.2 26.1 21.7 -30.8 A H-3 pCi/L 19733 20300 17800 - 22300 A Ootober 2009 RAD 79 Water Sr-89 pCi/L 64.75 62.2 50.2 - 70.1 A Sr-90 pCi/L 30.30 30.7 22.4 - 35.6 A Ba-133 pCi/L 97.9 92.9 78.3- 102 A Cs-134 pCi/L 76.8 79.4 65.0 - 87.3 A Cs-137 pCi/L 59.9 54.6 49.1 -62.9 A Co-60 pCi/L 121 117 105- 131 A Zn-65 pCi/L 115 99.5 89.6-119 A Gr-A pCi/L 19.6 23.2 11.6 -31.1 A Gr-B pCi/L 28.5 26.0 16.2-33.9 A 1-131 pCi/L 22.1 22.2 18.4-26.5 A H-3 pCi/L 16133 16400 14300 - 18000 A (1) Calculation did not allow for Y-90 ingrowth on the Sr-89 mount. NCR 09-14 (a) Teledyne Brown Engineering reported result.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetric and/or volumetric measurementsmade during standardpreparation.

(c) ERA evaluation: A=acceptable. Reported result falls within the Warning Limits. NA=not acceptable. Reported result falls outside of the Control Limits. CE=checkfor Error. Reported result falls within the Control Limits and outside of the Warning Limit.

D-4

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)

March 2009 09-MaW20 Water Cs-134 Bq/L 18.8 22.5 18.5- 29.3 A Cs-1 37 Bq/L 0.0601 (1) A Co-57 Bq/L 17.0 18.9 13.2-24.6 A Co-60 Bq/L 16.1 17.21 12.05 - 22.37 A 1--3 Bq/L 332 330.9 231.6 - 430.2 A Mn-54 Bq/L 13.8 14.7 10.26 - 19.06 A Sr-90 Bq/L 6.88 7.21 5.05- 9.37 A Zn-65 Bq/L 13.2 13.6 9.5 - 17.7 A 09-GrW20 Water Gr-A Bq/L 0.529 0.635 >0.0 - 1.270 A Gr-B Bq/L 1.87 1.27 0.64-1.91 A 09-MaS20 Soil Cs-134 Bq/kg 433 467 327 - 607 A Cs-137 Bq/kg 649 605 424 - 787 A Co-57 Bq/kg -0.120 (1) A Co-60 Bq/kg 3.91 4.113 (2) A Mn-54 Bq/kg 339 307 215-399 A K-40 Bq/kg 644 570 399 - 741 A Sr-90 Bq/kg 245 257 180 - 334 A Zn-65 Bq/kg 272 242 169 - 315 A 09-RdF2O AP Cs-134 Bq/sample 2.77 2.93 2.05 - 3.81 A Cs-137 Bq/sample 1.41 1.52 1.06- 1.98 A Co-57 Bq/sample 1.24 1.30 0.91 -1.69 A Co-60 Bq/sample 1.33 1.22 0.85 - 1.59 A Mn-54 Bq/sample 2.42 2.2709 1.5898 - 2.9522 A Sr-90 Bq/sample 0.713 0.64 0.448 - 0.832 A Zn-65 Bq/sample 1.30 1.36 0.95 - 1.77 A 09-GrF20 AP Gr-A Bq/sample 0.188 0.348 >0.0 - 0.696 A Gr-B Bq/sample 0.313 0.279 0.140 - 0.419 A March 2009 09-RdV20 Vegetation Cs-134 Bq/sample 3.48 3.40 2.38 -4.42 A W.

Cs-137 Bq/sample 1.15 0.93 0.65- 1.21 Co-57 Bq/sample 3.12 2.36 1.65-3.07 N (3)

Co-60 Bq/sample -0.0105 (1) A Mn-54 Bq/sample 2.98 2.3 1.61 -2.99 W K-40 Bq/sample 64.1 (4)

Sr-90 Bq/sample 1.09 1.260 0.882 - 1.638 A Zn-65 Bq/sample 1.73 1.3540 0.948 - 1.760 W September 2009 09-MaW21 Water Cs-134 Bq/L 26.5 32.2 22.5 -41.9 A Cs-137 Bq/L 37.2 41.2 28.8 - 53.6 A Co-57 Bq/L 32.2 36.6 25.6 - 47.6 A Co-60 Bq/L 14.0 15.40 10.8 -20.0 A H-3 Bq/L 705 634.1 443.9 - 824.3 A Mn-54 Bq/L -0.1015 (1) A Sr-90 Bq/L 13.9 12.99 9.09- 16.89 A Zn-65 Bq/L 26.2 26.9 18.8-35.0 A 09-GrW21 Water Gr-A Bq/L 1.27 1.047 >0.0 - 2.094 A Gr-B Bq/L 9.70 7.53 3.77 - 11.30 A D-5

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (h) Range Evaluation (c)

September 2009 09-MaS21 Soil Am-241 Bq/kg 74.7 89.8 62.9-116.7 A Cs-134 Bq/kg 0.554 (1) A Cs-137 Bq/kg 706 669 468-870 A Co-57 Bq/kg 606 586 410-762 A Co-60 Bq/kg 350 327.000 229-425 A Mn-54 Bq/kg 876 796 557-1035 A K-40 Bq/kg 425 375 263-488 A Sr-90 Bq/kg 505 455 319-592 A Zn-65 Bq/kg 1370 1178 825-1531 A 09-RdF21 AP Cs-134 Bq/sample -0.02 (1) A Cs-137 Bq/sample 1.4 1.4 0.98 - 1.82 A Co-57 Bq/sample 5.98 6.48 4.54 - 8.42 A Co-60 Bq/sample 1.01 1.03 0.72 - 1.34 A Mn-54 Bq/sample 5.16 5.49 3.84-7.14 A Sr-90 Bq/sarnple 0.925 0.0835 0.585 - 1.086 A Zn-65 Bq/sample 4.39 3.93 2.75 - 5.11 A 09-GrF21 AP Gr-A Bq/sample 0.357 0.659 >0.0 - 1.318 A Gr-B Bq/sample 1.403 1.320 0.66 - 1.98 A 09-RdV21 Vegetation Cs-134 Bq/sample -0.0027 (1) A Cs-137 Bq/sample 2.36 2.43 1.70-3.16 A Co-60 Bq/sample 2.58 2.57 1.80 - 3.34 A Mn-54 Bq/sample 8.36 7.9 5.5- 10.3 A K-40 Bq/sample 57.8 (4)

Sr-90 Bq/sample 1.73 1.78 1.25-2.31 A Zn-65 Bq/sample -0.59 (1) A (1) Falsepositive test.

(2) Sensativity evaluation.

(3) Homogeniety problem. MAPEP requires using entire sample but due to geometry limitationswe can only use part of the sample. NCR 09-13 (4) Not evaluated by MAPEP.

(a) Teledyne Brown Engineering reportedresult.

(b) The MAPEP known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetricand/or volumetric measurementsmade during standardpreparation. ,,

(c) DOEIMAPEPevaluation:A=acceptable,W=acceptable with warning, N=not acceptable.

D-6

TABLE D-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM, ENVIRONMENTAL, INC., 2009 (Page 1 of 1)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result'; Lit-its Resultb Acceptance Resultc Limits Acceptance STW-1 181 04/06/09 Sr-89 41.0 +/- 5.8 48.3 37.8 - 55.7 Pass STW-1 181 04/06/09 Sr-90 32.4 +/- 2.4 31.4 22.9 - 36.4 Pass STW-1 182 04/06/09 Ba-133 44.6 +/- 3.1 52.7 43.4 - 58.3 Pass STW-1 182 04/06/09 Co-60 81.0 +/- 3.1 88.9 80.0 - 100.0 Pass STW-1 182 04/06/09 Cs-134 65.6 +/- 5.2 72.9 59.5 - 80.2 Pass STW-1182 04/06/09 Cs-137 147.7 +/- 5.3 168.0 151.0 - 187.0 Fail STW-1 182 04/06/09 Zn-65 79.8 +/- 7.5 84.4 76.0 -101.0 Pass STW-1 183 04/06/09 Gr. Alpha 47.6. +/- 2.1 54.2 28.3 - 67.7 Pass STW-1 183 04/06/09 Gr. Beta 38.5 +/- 1.3 43.5 29.1 -50.8 Pass STW-1 184 04/06/09 1-131 24.4 +/- 2.5 26.1 21.7 -30.8 Pass STW-1186 04/06/09 H-3 22819.0 +/- 453.0 20300.0 17800.0 - 22300.0 Fail STW-1 193 10/05/09 Sr-89 53.0 +/- 6.0 62.2 50.2 - 70.1 Pass STW-1 193 10/05/09 Sr-90 31.1 +/- 2.2 30.7 22.4 - 35.6 Pass STW-1194 10/05/09 Ba-133 82.5 +/- 3.5 92.9 78.3 - 102.0 Pass STW-1 194 10/05/09 Co-60 116.8 +/- 3.3 117.0 105.0 - 131.0 Pass STW-1.194 10/05/09 Cs-134 78.8 +/- 5.7 78.8 65.0 - 87.3 Pass STW-1 194 10/05/09 Cs-137 54.2 +/- 3.7 54.6 49.1 -62.9 Pass STW-1 194 10/05/09 Zn-65 102.5 +/- 6.2 99.5 89.6-119.0 Pass STW- 195 10/05/09 Gr. Alpha 20.3 +/- 2.0 23.2 11.6 -31.1 Pass STW- 195 10/05/09 Gr. Beta 23.7 +/- 1.4 26.0 16.2 - 33.9 Pass STW-1 196 10/05/09 1-131 22.4 +/- 1.4 22.2 18.4 - 26.5 Pass STW-1 198 10/05/09 H-3 17228.0 +/- 694.0 16400.0 14300.0 - 18000.0 Pass a Results obtained by Environmental, Inc., Midwest Laboratoryas a participantin the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

" Unless otherwise indicated,the laboratoryresult is given as the mean +/- standarddeviation for three determinations.

C Results are presentedas the known values, expected laboratoryprecision (1 sigma, I determination) and control limits as provided by ERA.

d All gamma -emitters showed a 7ow bias. A large plastic burrfound on the base of the Marinellikept the beakerfrom sitting directly on the detector. Result of recount in a different beaker, Cs-137, 155.33

+ 14.55 pCi/L.

e Samples were recounted and also reanalyzed. A recount of the original vials averaged 23,009 pCi/L.

Reanalysis results were acceptable, 19,170 pCi/L.

D-7

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)Y ENVIRONMENTAL, INC., 2009 (Page 1 of 2)

Concentration b Known Control Lab Code c Date Analysis Laboratory result Activity Limits d Acceptance STW-1170 01/01/09 Co-57 19.60 +/- 0.40 18.90 13.20 - 24.60 Pass STW-1170 01/01/09 Co-60 16.60 +/- 0.30 17.21 12.05 - 22.37 Pass STW-1170 01/01/09 Cs-134 20.40 +/- 0.50 22.50 15.80 - 29.30 Pass STW-1170 e 01/01/09 Cs-137 0.10 +/- 0.20 0.00 0.00 -1.00 Pass STW-1170 01/01/09 H-3 359.90 +/- 33.90 330.90 231.60 - 430.20 Pass STW-1170 01/01/09 Mn-54 15.00 +/- 0.40 14.66 10.26 - 19.06 Pass STW-1170 01/01/09 Sr-90 7.87 +/- 1.39 7.21 5.05 - 9.37 Pass STW-1 170 01/01/09 Zn-65 14.00 +/- 0.70 13,60 9.50 -17.70 Pass STW-1171 01/01/09 Gr. Alpha 0.56 +/- 0.06 0.64 0.00 -1.27 Pass STW-1171 01/01/09 Gr. Beta 1.29 +/- 0.05 1.27 0.64-1.91 Pass STSO-1172e 01/01/09 - Co-57 0.00 +/- 0.00 0.00 0.00-1.00 Pass STSO-1172 01/01/09 Cs-1 34 458.60 +/- 7.40 467.00 327.00 -607.00 Pass STSO-1 172 01/01/09 Cs-137 652.30 +/- 3.50 605.00 424.00 -787.00 Pass STSO-1 172 01/01/09 K-40 636.40 +/- 9.50 570.00 360.40 -669.40 Pass STSO-1 172 01/01/09 Mn-54 346.40 +/- 3.10 307.00 215.00 -399.00 Pass STSO-1 172 01/01/09 Sr-90 180.60 +/- 12.10 257.00 180.00 -334.00 Pass STSO-1 172 01/01/09 Zn-65 268.30 +/- 4.00 242.00 169.00 -315.00 Pass STVE-1 173 01/01/09 Co-57 2.75 +/- 0.11 2.36 1.65 -3.07 Pass STVE-1173 01/01/09 Co-60 0.06 +/- 0.09 0.00 0.00 -1.00 Pass STVE-1 173 01/01/09 Cs-134 3.49 +/- 0.22 3.40 2.38 -4.42 Pass STVE-1 173 01/01/09 Cs-1 37 1.01 +/- 0.11 0.93 0.65 -1.21 Pass STVE-1 173 01/01/09 Mn-54 2.52 +/- 0.14 2.30 1.61 -2.99 Pass STVE-1 173 01/01/09 Zn-65 1.52 +/- 0.18 1.35 0.95 -1.76 Pass STAP-1174 01/01/09 Co-57 1.25 +/- 0.05 1.30 0.91 -1.69 Pass STAP-1 174 01/01/09 Co-60 1.17 +/- 0.06 1.22 0.85-1.59 Pass STAP-1174 01/01/09 Cs-134 2.67 +/- 0.14 2.93 2.05 - 3.81 Pass STAP-1 174 01/01/09 Cs-137 1.53 +/- 0.08 1.52 1.06 -1.98 Pass STAP-1 174 01/01/09 Mn-54 2.34 +/- 0.09 2.27 1.59 -2.95 Pass STAP-1174' ,01/01/09 Sr-90 0.93 +/- 0.14 0.64 0.45 -0.83 Fail STAP-1 174 01/01/09 Zn-65 1,44 +/- 0.14 1.36 0.95 -1.77 Pass STAP-1175 01/01/09 Gr. Alpha 0.22 +/- 0.03 0.35 0.00 -0.70 Pass STAP-1175 01/01/09 Gr. Beta 0.36 +/- 0.04 0.28 0.14-0.42 Pass STW-1 192 07/01/09 Co-57 37.20 +/- 1.50 36.60 25.60 - 47.60 Pass STW-1192 07/01/09 Co-60 15.10 +/- 0.90 15.40 10.80 -20.00 Pass STW-1192 07/01/09 Cs-134 30.30 +/- 2.10 32.20 22.50 -41.90 Pass STW-1192 07/01/09 Cs-137 41.90 +/- 1.80. 41.20 28.80 -53.60 Pass STW-1192 07/01/09 H-3 680.30 +/- 33.60 634.10 443.90 - 824.30 Pass STW-1192 e 07/01/09 Mn-54 0.01 +/- 0.26 0.00 0.00 -1.00 Pass STW-1 192 07/01/09 Sr-90 12.90 +/- 1.70 12.99 9.09 -16.89 Pass STW-1 192 07/01/09 Zn-65 28.50 +/- 2.40 26.90 18.80 -35.00 Pass D-8

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPr ENVIRONMENTAL, INC., 2009 (Page 2 of 2)

Concentration "

Known Control Lab Code Date Analysis Laboratory result Activity Limits d Acceptance STW-1191 07/01/09 Gr. Alpha 0.88 +/- 0.07 1.05 0.00 -2.09 Pass STW-1191 07/01/09 Gr. Beta 7.29 +/- 0.10 7.53 3.77-11.30 Pass STSO-1 188 07/01/09 Co-57 674.60 +/- 9.00 586.00 410.00 -762.00 Pass STSO-1 188 07/01/09 Co-60 356.40 +/- 6.30 327.00 229.00 -425.00 Pass STSO-1 188 07/01/09 Cs-134 0.20 +/- 1.90 0.00 0.00 -1.00 Pass STSO-1 188 07/01/09 Cs-1 37 767.50 +/- 12.00 669.00 468.00 -870.00 Pass STSO-1 188 07/01/09 K-40 433.00 +/- 37.20 375.00 263.00 -488.00 Pass STSO-1 188 07/01/09 Mn-54 931.60 +/- 14.10 796.00 557.00 -1035.00 Pass STSO-1188 g 07/01/09 Sr-90 310.50 +/- 12.20 455.00 319.00 -592.00 Fail STSO-1 188 07/01/09 Zn-65 1433.90 +/- 25.20 1178.00 825.00 -1531.00 Pass Pass STVE-1 190 07/01/09 Co-57 8.90 +/- 0.60 8.00 5.60 - 10.40 STVE-1 190 07/01/09 Co-60 2.50 +/- 0.36 2.57 1.80 -3.34 Pass STVE-1 190 07/01/09 Cs-134 0.01 +/- 0.11 0.00 0.00-0.10 Pass STVE-1 190 07/01/09 Cs-137 2.42 +/-0.16 2.43 1.70 -3.16 Pass STVE-1 190 07/01/09 Mn-54 8.35 +/- 0.70 7.90 5.50 -10.30 Pass STVE-1 190 07/01/09 Zn-65 0.01 +/- 0.26 0.00 0.00 -0.10 Pass STAP-1 189 07/01/09 Gr. Alpha 0.33 +/- 0.04 0.66 0.00 -1.32 Pass STAP-1 189 07/01/09 Gr. Beta 1.57 +/- 0.07 1.32 0.66 -1.98 Pass STAP-1 190 07/01/09 Co-57 6.78 +/- 0.27 6.48 4.54 - 8.42 Pass STAP-1 190 07/01/09 Co-60 1.06 +/- 0.18 1.03 0.72- 1.34 Pass STAP-1 190 07/01/09 Cs-134 0.01 +/- 0.06 0.00 0.01 - 0.05 Pass STAP-1 190 07/01/09 Cs-137 1.49 +/- 0.27 1.40 0.98 -'1.82 Pass STAP-1 190 07/01/09 Mn-54 6.00 +/- 0.45 5.49 3.84 -7.14 Pass STAP-1 190 07/01/09 Sr-90 0.79 +/- 0.13 0.84 0.59 - 1.09 Pass STAP-1 190 07/01/09 Zn-65 4.55 +/- 0.66 3.93 2.75 -5.11 Pass 8 Results obtained by Environmental, Inc., Midwest Laboratory as a participantin the Departmentof Energy's Mixed Analyte Performance Evaluation Program, Idaho Operationsoffice, Idaho Falls, Idaho Results are reportedin units of Bq/kg (soil), Bq/L (watei) or Bq/total sample (filters, vegetation).

Laboratorycodes as follows: STW (water), STAP (airfilter), STSO (soil), STVE (vegetation).

d MAPEP results are presented as the known values and expected laboratoryprecision (1 sigma, I determination) and control limits as defined by the MAPEP.

o Included in the testing series as a "false positive".

No reason was determined for the initial high results. The analysis was repeated;result of reanalysis; 0.54 +/- 0.12 Bq/filter.

g Incomplete separationof strontium from calcium could result in a higherrecovery percentage and consequently,lower reportedactivity. The analysis was repeated; result of reanalysis 363.3 +/- 28.6 Bq/kg.

D-9

Intentionally left blank APPENDIX E EFFLUENT DATA

TABLE OF CONTENTS INT R O DUC T ION ................................................................................................................. 1 S UMM A RY ........................................................................................................................... 2 1.0. EFFLUENTS .................................................................................................. 3 1.1. Gaseous Effluents to the Atmosphere ............................................. 3 1.2. Liquids Released to Lake Michigan .................................................. 3 2.0. SOLID RADIOACTIVE W ASTE ................................................................... 3 3.0. DOSE TO MAN .............................................................................................. 3 3.1. Gaseous Effluent Pathways ............................................................... 3 3.1.1. Gaseous Releases ............................................................... 4

- 3.1.1.1. Gamma Dose Rates ....................... 4 3.1.1.2. Beta Air and Skin Dose Rate ................................ 4 3.1.2. Radioactive Iodine ............................................................... 5 3.1.3. Dose to Thyroid ................................................................... 5 3.2. Liquid Effluent Pathways ................................................................... 5 3.3. Assessment of Dose to Member of Public ........................................ 5 4.0. SITE METEOROLOGY ................................................................................ 6

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES ............................................................. E-1.1 Station Releases Table 2.0-1 Solid Radioactive W aste ........................................................... E-1.2 Table 3.1-1 Maximum Doses Resulting from Airborne Releases ................ E-1.3 Table 3.2-1 Maximum Doses Resulting from Liquid Effluents ..................... E-1.5 Table 3.3-1 10CFR20 Compliance Assessment .......................................... E-1.6 Table 3.4-1 Maximum doses Resulting from Airborne Releases Based On Concurrent Meteorological Data ......................... I............... E-1.7 ii

INTRODUCTION Units 1 and 2 of the Zion Station, located in Zion, Illinois adjacent to Lake Michigan, are 1100 MWe (3520 MWt) Westinghouse pressurized water reactors.

The plant permanently ceased operation in February of 1998 and has been permanently defueled.

The station was designed to keep releases to the environment at levels below those specified in the regulations. Historical data has been established that Zion, as a fully operational facility, did not contribute appreciable doses to the surrounding public. Sampling results for 2009 showed minimal releases above background for a variety of monitored pathways, e.g. water, vegetation, air samples and TLIV.

Liquid effluents from Zion Station are released to Lake Michigan in controlled batches after radioassay of each batch and continuously through a monitored pathway. There are no routine noble gas releases. Due to decay, iodine is no longer present. The only noble gas that remains is Kr85 captured in the spent fuel assemblies stored in the fuel pool in the fuel building. A new ventilation system for the FB has been installed to monitor possible releases. The results of effluent analyses are summarized on a monthly basis and reported to the Nuclear Regulatory Commission as required per Technical Specifications.

Airborne concentrations of noble gases and particulate radioactivity in offsite areas are calculated using effluent and meteorological data.

Environmental monitoring was conducted by sampling at indicator and control (background) locations in the vicinity of the Zion Station to measure changes in radiation or radioactivity levels that may be attributable to the station. If significant changes attributable to Zion Station are measured, these changes are correlated with effluent releases.

1

SUMMARY

Gaseous and liquid effluents for the period contributed to only a small fraction of the Station Technical Specification limits. Calculations of environmental concentrations based on effluent and meteorological data for the period indicate that consumption by the public of radionuclides attributable to the Zion Station does not exceed regulatory limits. Radiation exposure from radionuclides released to the atmosphere represented the critical pathway for the period with a maximum individual total body dose estimated to be 2.62E-05 mrem for the year, where a shielding and occupancy factor of 0.7 is assumed. The assessment of radiation doses is performed in accordance with the Exelon Offsite Dose Calculation Manual (ODCM). The results of analysis confirm that the station is operating in compliance with 1 OCFR50 Appendix 1, 1 OCFR20 and 40CFR1 90.

2

1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere Measured concentrations and isotopic composition of noble gases and particulate radioactivity released to the atmosphere were monitored during the year. A total of O.OOE+00 microcuries of fission and activation gases was released with a maximum average release rate of 0.00E+00 pCi/sec during any one quarter period.

A total of 5.57E-01 microcuries of beta-gamma emitters was released as airborne particulate matter with a maximum average quarterly release rate of 3.5E-08 pCi/sec. quarterly only.

Alpha-emitting radionuclides were not measurable. Also, 0.OOE+00 curies of tritium were released with a maximum average quarterly reTease rate of 0.00E+00 pCi/sec.

1.2 Liquids Released to Lake Michiqan A total of 1.33E+07 liters of liquid waste containing O.OOE+00 microcuries was discharged from the station via an approved pathway after dilution with a total of 4.26E+10 liters of water. These wastes were released at a maximum quarterly average concentration of O.OOE+00 pCi/ml. A total of O.OOE-00 curies of tritium was released. Alpha activity released totaled 0.00 pCi for the year. Monthly release estimates and principal radionuclides in liquid effluents are reported in the Zion Nuclear Power Station Radioactive Effluent Report for 2009.

2.0 SOLID RADIOACTIVE WASTE There was one solid radioactive waste shipment. For more detail, refer to Zion Station 2009 Effluent Report.

3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne iadioactivity via the different exposure pathways.

3

3.1.1 Gaseous Releases 3.1.1.1 Gamma Dose Rates Offsite Gamma air and whole (total) body dose rates are shown in Table 3.1-1 and were calculated based on measured release rates, isotopic composition of the gases, and meteorological data for the period. Based on measured effluents and average meteorological data, the maximum total body dose to an individual would be 2.62E-05 mrem (child) for the year (Table 3.1-1), with an occupancy or shielding factor of 0.7 included, and based on measured effluents and concurrent meteorological data would be O.OOE+00 mrem (Table 3.4-1). The maximuim gamma air dose was 0.OOE+00 mrad based on measured effluents and average meteorological data (Table 3.1-1), and O.OOE+00 mrad based on measured effluents and concurrent meteorological data (Table 3.4-1).

3.1.1.2 Beta Air and Skin Dose Rates The range of beta particles in air is relatively small (on the order of a few meters or less);

consequently, plumes of gaseous effluents may be considered "infinite" for purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm2 and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 0.OOE+00 mrem based on measured effluents and average meteorological data (Table 3.1-1), and O.00E+00 mrem based on measured effluents and concurrent meteorological data (Table 3.4-1).

4

The maximum offsite beta air dose for the year was O.OOE+00 mrad based on measured effluents and average meteorological data (Table 3.1-1), and O.OOE-O00 mrad based on measured effluents and concurrent meteorological data (Table 3.4-1).

3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. The radioiodine, 1-131, released during routine operation of the station, may be made available to man resulting in a dose to the thyroid.

The principal pathway of interest for this radionuclide is ingestion of radioiodine in milk. As Zion Station is not operational and 1-131 has decayed away, the maximum offsite concentration is estimated to be zero, as expected.

3.1.3 Dose to Thyroid The hypothetical thyroid dose to a maximum exposed individual living near the station via ingestion of milk was calculated. As Zion Station is not operational and 1-131 has decayed away, the maximum offsite concentration is estimated to be zero, as expected.

3.2 Liquid Effluent Pathways The three principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water, eating aquatic foods, and exposure while on the shoreline.

Not all of these pathways are significant or applicable at a given time but a reasonable approximation of the dose can be made by adjusting the dose formula for season of the year or type and degree of use of the aquatic environment. NRC developed equations* were used to calculate the doses to the whole body, lower GI tracts, thyroid, bone, skin; specific parameters for use in the equations are given in the Exelon Offsite Dose Calculation Manual. The maximum whole body dose (total body) for the year was O.OOE+00mrern (adult) and no organ dose exceeded O.OOE+00 mrem (teenage liver) (Table 3.2-1).

3.3 Assessment of Dose to Member of Public During the period January to December, 2009, Zion Station did not 5

exceed the below limits as shown in Table 3.1-1 and Table 3.2-i (based on yearly average meteorological data), and Figure 3.1-1 (based on concurrent meteorological data):

0 The RETS limits on dose or dose commitment to an individual due to radioactive materials in liquid effluents from each reactor unit (3 mrem to the whole body or 10 mrern to any organ during any calendar year).

The RETS limits on air dose in noble gases released in gaseous effluents to a member of the public from each reactor unit (10 mrads for gamma radiation or 20 mrad for beta radiation during any calendar year).

The RETS limits on dose to a member of the public due to iodine-131, iodine-1 33, tritium, and radionuclides in particulate form 'with half-lives greater than eight days in gaseous effluents released from each reactor unit (15 mrem to any organ during any calendar year).

The 10CFR20 limit on Total Effective Dose Equivalent to individual members of the public (100 mrem).

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix 11. The data are presented as cumulative joint frequency

• Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) distributions of the wind direction for the 250' level and wind speed class by atmospheric stability class determined from the temperature difference between the 250' and 35' levels. Data recovery for these measurements was 99.4% during 2009 (Table 3.4-1).

6

APPENDX E-1 DATA TABLES AND FIGURES E- 1.1

Table 2.0-1 Solid Radioactive Waste Table 2.0-1 has been deliberately deleted. For details on solid waste disposal, see the Zion 2009 Annual Effluent Report E-1.2

Table 3.1-1 Maximum Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2

--- I&P DOSE LIMIT ANALYSIS 1 -=QUARTER Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr I - Admin. Any Organ 0.00Et00 1.00E+01 0. 00E--00 Qtr 1 - Admin. Total Body 0.00E+00 1.00E+01 0. OOE+00 Qtr 1 - T.Spc. Any Organ 0.00E+00 1.00E+01 0.00E+00 Receptor: 0 Distance: (meters) CompPass Point:

Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 1 - T.Spc. Total Body 0.00E+00 1.00E+01 0.00E+00 Receptor: 0 Distance: (meters) CompPass Point:

Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage E-1.3

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 NG DOSE LIMIT ANALYSIS 1 -=QUARTER Dose Limit Max % of Quarter - Limit (mrad) (mrad) Limit Qtr 1 - Admin. Gamma 0.O0E+00 1.00E+01 0. 00E+00 Qtr 1 - Admin. Beta 0.OOE+00 1.OOE+01 0. OOE+00 Qtr 1 - T.Spc. Gamma 0.00E+00 1.OOE+01 U.00E+U0 Receptor: 0 Distance: (meters) Compass Point:

Nuclide Percentage Qtr 1 - T.Spt. Beta 0.00E+00 1.00E+01 0.00E+00 Receptor: 0 Distance: (meters) Compass Point:

Nuclide Percentage E-1.4

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 I&P DOSE LIMIT ANALYSIS QUI\RTER 2 Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr 2 - Admin. Any Organ ADULT GILLI 2.97E-05 5.63E+00 5.28E-04 Qtr 2 - Admin. Total Body CHILD TBODY 2.62E-05 5.25E+00 4.99E-04 Qtr 2 - T.Spc. Any Organ ADULT GILLI 2.97E-05 7.50E+00 3.96E-04 Receptor: 5 Compo~ite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.00E+02 Qtr 2 - T.Spc. Total Body CHILD TBODY 2.62E-05 7.50E+00 3.49E-04 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.OOE+02 E-1.5

Table 3.1-I (continued)

Maximum Doses Resulting from Airborne Releases 40CFRI.90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2

--- NG DOSE LIMIT ANALYSIS --- QUARTER 2 Dose Limit Max % of Quarter - Limit (mrad) (mrad) Limit Qtr 2 - Admin. Gamma 0.OOE+00 7.50E+00 0.OOE+00 Qtr 2 - Admin. Beta 0.00E+00 7.50E+00 0. OOE+00 Qtr 2 - T.Spc. Gamma 0.OOE+00 7.50E+00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage Qtr 2 - T.Spc. Beta 0.OOE+00 7.50E+00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage E-1.6

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 I&P DOSE LIMIT ANALYSIS QUARTER 3 Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr 3 - Admin. Any Organ 0.OOE+00 7.50E+00 0.OOE+00 Qtr 3 - Admin. Total Body 0.00E+00 7.50E+00 0. OOE+00 Qtr 3 - T.Spc. Any Organ 0.OOE+00 7.50E+00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Comp ass Point: NA Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 3 - T.Spc. Total Body 0.00 E+00 7.50E+00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Comp ass Point: NA Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage E-1.7

• Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 NG DOSE LIMIT ANALYSIS QUARTER 3 Dose Limit Max % of Quarter - Limit (mrad) (mrad) Limit Qtr 3 - Admin. Gamma

0. 00E+0 0 7.50E+00 0. 00E+00 Qtr 3 - Admin. Beta

0. 00E+0 0 7.50E+00 0. OOE+00 Qtr 3 - T.Spc. Gamma 0.001E+00 7.50E+00 0.OOE+00 Receptor: 5 Compos~it e Crit. Receptor - IP Distance: 0.00 (mieters) Compass Point: NA Nuclide Pe.rcentage Qtr 3 - T.Spc. Beta 0.OOE+00 7.50E+00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage E-1.8

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: I To: 2 I&P DOSE LIMIT ANALYSIS QUARTER 4 ---

Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr 4 - Admin. Any Organ 0.00E+00 7.50E+00 0. 00E+00 Qtr 4 - Admin. Total Body 0.00E+00 7.50E+00 0. 00E+00 Qtr 4 - T.Spc. Any Organ 0.00E+00 7.50E+00 0. 00E+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Comp*ass Point: NA Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 4 - T.Spc. Total Body 0.00E+00 7.50E+00 0.00E+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage E-1.9

Table 3.1-1 (continued)

Maximum Doses Resulting froin Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 NG DOSE LIMIT ANALYSIS UARTER 4 Dos Dose Limit Max % of Quarter - Limit (mrad) (mrad) Limit

--r 4 - Admin. Gamma 0 . 0E+/-00 7.50E+00 0. 00E+00 Qtr 4 - Admin. Beta 0 . OOE+00 7.50E+00 0. 00E+00 Qtr 4 - T.Spc. Gamma 0.001E+00 7.50E+00 0.OOE+/-00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage Qtr 4 - T.Spc. Beta 0.001;'+00 7.50E+-00 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage E-1.10

• ,Table 3.1-1 (continued)

Maximuni Doses Resulting from Airborne Releases 40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 I&P DOSE LIMIT ANALYSIS ANNUAL 2009 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2009 - Admin. Any Organ ADULT GILLI 2.97E-05 1. 13E+01 2 .64E-04 2009 - Admin. Total Body CHILD TBODY 2 . 62E-05 1. 05E+01 2.49E-04 2009 - T.Spc. Any Organ ADULT GILLI 2.97E-05 1.50E+01 1. 98E-04 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.00E+02 2009 - T.Spc. Total Body CHILD TBODY 2.62E-05 1.50E+01 1.74E-04 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.OOE+02 E-i.11I

Table 3.1-1 (continued)

Maximumn Doses Resulting from Airborne Releases 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 NG DOSE LIMIT ANALYSIS ANNUAL 2009 Dose Limit Max % of Annual - Limit (mrad) (mrad) Limit 2009 - Admin. Gamma 0.OOE+00 1.50E+01 0. OOE+00 2009 - Admin. Beta 0.OOE+00 1.50E+01 0.OOE+00 2009 - T.Spc. Gamma 0.OOE+00 1.50E+01 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage 2009 - T.Spc. Beta 0.OOE+00 1.50E+-01 0.OOE+00 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage E- 1.12

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 40CFR]90 URANIUM FUEL CYCLE DOSE REPORT Report for: 2009 Unit Range - From: 1 To: 2

=== MAXIMUM DOSE ANALYSIS -- =ANNUAL 2009 ---

Age Dose Dose Type Group Organ (mrem)

Any Organ ADULT GILLI 2.97E-05 Liquid Receptor: NA Gaseous Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Liquid Dose: 0.OOE+00  % of Total: 0.OOE+00 Critical Pathway: F-otable Water (PWtr)

Major Contributors 0% or greater to total)

Nuclide Percentage Gaseous Dose: 2.97E-05  % of Total: 1.OOE+02 Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.0OE+02 MAXIMUM DOSE ANALYSIS ANNUAL 2009 Age Dose Dose Type Group Organ (mrem)

Total Body CHILD TBODY 2.62E-05 Liquid Receptor: NA Gaseous Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Liquid Dose: 0.OOE+00  % of Total: 0.OOE+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to total)

Nuclide Percentage Gaseous Dose: 2.62E-05  % of Total: 9.99E+01 Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors (0% or greater to total)

Nuclide Percentage CO-60 1.OOE+02 E- 1.13

Table 3.2-1 Maximum Doses Resulting from Liquid Effluents 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) =====-----QUARTER 1 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB SITE DOSE LIMIT ANALYSIS ------- ý=-----== QUARTER 1 Ac e Dose Limit Max % of Quarter - Limit G -oup Organ mrem) (mrem) Limit Qtr 1 - Admin.. Any Organ 0.00E+00 0.OOE+00 0 . 00OE+00 Qtr 1 - Admin. Total Body 7tDULT TBODY 0.OOE+00 1.13E+00 0. 00E+00 Qtr 1 - T.Spc. Any Organ 0.OOE+00 3.75E+/-00 0.OOE+400 Critical Pathway:

Major Contributors (0% or greater to tot Nuclide Percentage Qtr 1 - T.Spc. Total Body ADULT TBODY 0.OOE+00 1.50E+00 0.00E+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to tot Nuclide Percentage E- 1.14

Table 3.2-1 (continued)

Maximum Doses Resulting from Liquid Effluents 40CFR190 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) =========-QUARTER 2 Agegrp Bone Liver Thyroid. Kidney Lung GI-LLI Skin TB SITE DOSE LIMIT ANALYSIS = QUARTER 2 Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr 2 - Admin. Any-Organ 0.00E+00 5.00E+00 0. 00E+00 Qtr 2 - Admin. Total Body ADULT TBODY 0.00E+/-00 1.13E+00 0. 00E+00 Qtr 2 . - T.Spc. Any Organ 0.00E+00 3.75E+00 0.O0Ei00 Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 2 - T.Spc. Total Body ADULT TBODY ,0.00E+00 1.50E+00 0.00E+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to total)

Nuclide Percentage E- 1.15

Table 3.2-1 (continued)

Maximum Doses Resulting from Liquid Effluents 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem)---------- QUARTER 3 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB SITE DOSE LIMIT ANALYSIS QUARTER 3 Age Dose Limit Max % of Quarter - Limit Group Organ (mrem) (mrem) Limit Qtr 3 - Admin. Any Organ 0.OOE+00 5.00E+00 0.OE+00 Qtr 3 - Admin. Total Body ADULT TBODY 0.OOE+00 1.13E+00 0. 00E+00 Qtr 3 - T.Spc. Any Organ 0.OOE+00 3.75E+/-00 0.00E+00 Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 3 - T.Spc. Total Body ADULT TBODY 0.OOE+00, 1.50E+00 0.00E+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to total)

Nuclide Percentage E- 1.16

Table 3.2-1 (continued)

Maximum Doses Resulting from Liquid Effluents 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) QUARTER 4 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB SITE DOSE LIMIT ANALYSIS 4 -=QUARTER Age Dose Limit Max % of Quarter - Limit Group Or gan (mrem) (mrem) Limit Qtr 4 - Admin. Anr Organ 0.OOE+00 5.OOE+00

0. 00E+00 Qtr 4 - Admin. Total Body ADULT TB ODY 0.OOE+00 1.13E+00 Qtr 4 - T.Spc. Any Organ 0.00E+00 3.75E+00 0.00E+00 Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage Qtr 4 - T.Spc. Total Body ADULT TBODY 0.00E+00 1.50E+00 0.OOE+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to total)

Nuclide Percentage E-i.17

Table 3.2-1 (continued)

,Maximum Doses Resulting foro Liquid Effluents 40CFR190 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2009 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) ANNUAL 2009--------

Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB

=== SITE DOSE LIMIT ANALYSIS------ ANNUAL 2009 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2009 - Admin.

Any-Organ 0.00E+00 5.00E+00 0 OOE+00 2009 - Admin.

Total Body ADULT TBODY 0.OOE+00 2.25E+00 0. OE+00 2009 - T.Spc. Any Organ 0.00E+00 7.50E+00 0.OOE+00 Critical Pathway::

Major Contributors (0% or greater to total)

Nuclide Percentage 2009 - T.Spc. Total Body ADULT TBODY 0.OOE+00 3.OOE+00 0.OOE+00 Critical Pathway: Potable Water (PWtr)

Major Contributors (0% or greater to total)

Nuclide Percentage E-1.18

Table 3.3-1 IOCFR2O Compliance Assessment ZION STATION 2009 Unit 1 10CFR20 Compliance Assessment

1. 10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent 2.80E-05 mrem/year 10 CFR 20.130.1 (a) (1) limit 100 mrem/year

% of the limit 0.00000028

2. Compliance Summary 10CFR20 st Qtr. 2nd Qtr. 3rd Qtr. 4 th Qtr % of Limit 1

TEDE 0 2.80E-05 0 0 0.00000028 ZION STATION 2009 Unit 2 10CFR20 Compliance Assessment

1. 10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent 2.80E-05 mrem/year 10 CFR 20.1301 (a) (1) limit 100 mrem/year

% of the limit 0.00000028

2. Compliance Summary 10CFR20 Ist Qtr. 2nd Qtr. 3rd Qtr. 4 th Qtr % of Limit TEDE 0 2.80E-05 0 0 0.00000028 E-1.19

'fable 3.4-1 Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zion Station - Unit I MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 0. OOOE+00( N )) 0. OOOE+00 N) 0. 000E+00 N )) 0 . OOE+00( N )) 0.000E+00( N)

BETA AIR (mrad) 0.000E+00( N 0. OOE+00( N) 0. 000E+00 N 0.000Et00( N 0.000E+00( N)

) ) )

WHOLE BODY (mrem) 0. OOOE+00( N ) 8. 020E-07 W) 0. 000E+00 N ) 0. 000E+00 N ) 8. 020E-07 W)

SKIN (mrem) 0.000E+00( N ) 9.430E-07 W) 0. 000E+00 N ) 0. OOOE+00 N ) 9.430E-07 W)

ORGAN (mrem), 0. 00E+00- ( N. 1. 130E-06 NE) 0. 000E+00 N 0. 000E+00 N 1. 130E-06 NE)

CRITICAL PERSON Adult Teenager Adult Adult Teenager CRITICAL ORGAN Bone Lung Bone Bone Lung COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE % OF APP. I GAMMA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 WHOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Lung Lung Calculation used release data from the following:

Unit 1 - Ground Date of calculation: 2/15/2010 E-1.20

Table 3.4-1 (continued)

Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zion Station - Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 0.000E+00 N )) 0. 000E+00 N) 0. 000E+00( N )) 0. OOOE+00 N )) 0. OOOE+00 N)

BETA AIR (mrad) 0. OOOE+00 N

) 0. OOOE+00 N) 0. OOOE+00 ( N

) 0. OOOE+00 N

) 0. OOOE+00 N)

WHOLE BODY (mrem) 0.000E+00 N 8. 020E-07 W) 0. 000E+00( N 0. OOOE+00 N 8. 020E-07 N)

) ) ) N)

SKIN (mrem) 0. 000E+00 N ) 9.430E-07 W) 0. OOOE+00 N

) 0. OOOE+00 N ) 9 .4 30E-07 ORGAN (mrem) 0. 000E+00 N 1. 130E-06 NE) 0. OOOE+00 N 0. OOOE+00 N 1.130E-06 NE)

CRITICAL PERSON Adult Teenager Adult Adult Teenager CRITICAL ORGAN -Bone Lung Bone Bone Lung COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLYOBJECTIVE  % OF APP. I GAMMA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 WHOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Lung Lung Calculation used release data from the following:

Unit 2 - Ground Date of calculation: 2/15/2010 E-1.21

Intentionally left blank APPENDIX F METEOROLOGICAL DATA

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Extremely Unstable - 250Ft-33Ft'Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 U U 0 NNE 0 0 2 NE 0 0 2 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 0 SSW 0 0 0 SW 0 0 0 WSW 0 0 0 W 0 0 0 WNW 0 0 0 NW 0 0 0 0 40 NNW 0 Variable 0 0 0 0

Total 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Moderately Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 0 ENE 0 2 E - 0 0*

ESE 0 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 SW 0 0 WSW 0. 0 W 0. 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 0 0 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E - 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 0 24 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Neutral - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 4 12 0 0 18 NNE 2 5 25 4 0 0 36 NE 1 6 11 16 0 0 34 ENE 1 9 3 5 0 0 18 E - 0 8 3 7 0 0 18 ESE 2 9 9 3 0 0 23 SE 2 7 17 2 0 0 28 SSE 0 2 22 7 0 0 31 S 0 2 9 7 0 0 18 SSW 0 5 13 6 2 0 26 SW 0 7 20 16 9 0 52 WSW 0 12 20 11 0 0 43 W 0 13 57 16 2 0 88 WNW 0 12 50 10 1 0 73 NW 0, 15 48 13 0 0 76 NNW 0 10 14 14 0 0 138 Variable 0 0 0 0 0 0 0 Total 8 124 325 149 14 0 620 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 34 Hours of missing stability, measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Slightly Stable - 250Ft-33Ft Dtilta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 12 9 9 7 0 37 NNE 2 10 11 3 4 0 30 NE 5 4 20 3 0 0 32 ENE 2 6 2 2 0 0 12 E 4 2 5 8 0 0 19 ESE 2 9 7 2 0 0 20 SE 4 18 28 12 0. 0 62 SSE 2 15 35 14 2 0 68 S 5 48 25 2 0 0 80 SSW 7 40 32 15 0 0 94 SW 5 24 32 17 2 0 80 WSW 5 30 31 2 1 0 691 W 13 67 86 15 4 0 185 WNW 12 58 62 5 0 0 137 NW 10 82 67 17 0 0 176 NNW 2 22 15 8 0 0 47 Variable 0 0 0 0 0 0 0 Total 80 447 467 134 20 0 1148 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 23 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Moderately Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 5 5 0 0 0 11 NNE 3 5 1 0 0 0 9 NE 0 2 1 0 0 0 3 ENE 1 1 0 0 0 0 2 E - 1 2 2 0 0 0 5 ESE 2 2 2 0 0 0 6 SE 1 4 3 1 0 0 9 SSE 1 8 13 1 1 0 24 S 3 19 5 2 0 0 29 SSW 13 10 1 1 0 0 25 SW 9 4 0 0 0 0 13 WSW 7 6 0 0 0 0 13 W 3 26 0 0 0 0 29 WNW 6 16 0 0 0 0 22 NW 4 7 0 0 0 0 11 NNW 0 1 1. 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 55 118 34 5 1 0 213 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Extremely Stable - 250Ft-33Ft D'bIta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 U U U 5 NNE 1 0 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 3 0 0 0 0 0 3 E 1 0 0 0 0 0 1 ESE 1 0 0 0 0 0 1 SE 0 1 0 0 0 0 1 SSE 0 2 3 2 0 0 7 S 1 27 0 29 SSW 4 3 0 8 SW 6 1 0 7 WSW 2 2 0 4 4 0 0 4 WNW 0 1 0 1 NW 1 0 0 1 NNW 1 0 0 1 Variable 0 0 0 0 Total 27 40 0 74 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Extremely Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 1 1 0 0 2 NE 0 0 0 2 0 0 2 ENE 0 0 0 0 0 0 0 E - 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0. 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 1 3 0 0 4 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Moderately Unstable - 250Ft-33Ft 'Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabil ity class: 0 Hours of missing stability measurements in all st ability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 3 NE 0 1 ENE 0 4 E - 0 0" ESE 0 1 SE 0 6 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 7 WNW 0 2 NW 0 0 NNW 0 0 Variable 0 0 Total 0 1 9 4 10 0 24 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Neutral - 250Ft-33Ft Delta--T (F)

Win ds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 2 13 5 24 NNE 0 1 14 17 9 3 44 NE 0 7 5 15 14 2 43 ENE 0 3 5 3 3 ' 0 14

- 0 5 4 3 4 0 16 ESE 0 4 3 7 4 2 20 SE 0 4 14 10 10 2 40 SSE 1 0 12 6 5 0 24 S 0 0 4 9 8 0 21 SSW 0 1 8 9 4 3 25 SW 0 4 6 11 13 14 48 WSW 0 6 11 16 7 5 45 W 0 5 24 36 21 7 93 WNW 0' 2 19 31 20 1 73 NW 0 5 19 31 22 1 78 NNW 0 6 10 10 10 4 40 Variable 0 0 0 0 0 0 0 Total 1 54 161 216: 167 49 648 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stabi.ity Class -- Slightly Stable - 250Ft-33Ft Deita-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 8 11 7 14 42 NNE 0 2 6 10 1 4 23 NE 0 0 10 14 6 0 30 ENE 0 1 6 5 1 2 15 E - 2 3 1 3 2 5 16 ESE 2 4 4 12 6' 7 35 SE 2 3 14 9 19 21 68 SSE 0 16. 17 19 16 5 73 S 0 3 24 31 9 0 67 SSW 0 3 21 48 9 12 93 SW 1 3 17 28 16 12 77 WSW 0 7 18 26 14 2 67 W 0 6 22 71 59 9 167 WNW 2 6 28 56 44 4 140 NW 0 10 31 90 38 9 178 NNW 0 4 35 24 12 1 76 Variable 1 0 0 0 0 0 1 Total 10 73 262 457 259 107 1168 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 4 j

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Moderately Stable - 250Ft-33Ft 3elta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 24 Total N 0 5 4 3 0 0 12 NNE 0 1 3 4 1 0 9 NE 1 3 2 3 3 0 12 ENE 0 0 2 0 1 0 3 E - 0 2 2 0 0 1 ESE 0 2 1 0 0 4 7 SE 2 3 7 2 1 3 18 SSE 0 4 7 8 7 5 31 S 0 3 6 11 4' 0 24 SSW 0 4 11 1 0 18 2

SW 5 0 3 4 0 0 12 WSW 0 0 4 10 0 0 14 0 1 19 1 0 22 WNW 1 1 3 8 0 0 13 NW 0 3 11 0 0 15 NNW 0 0 2 4 1 0 7 Variable 0 0 0 0 0 0 0 Total 11' 26 54 98 20 13 222 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2009 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 2 NE 0 2 ENE 0 0 E 0 2 ESE 0 1 SE 0 6 SSE 0 16 S 0 16 SSW 0 20 SW 0 6 WSW 0 1 W 0 2 WNW 0 1 NW 0 1 NNW 0 0 Variable 0 0 Total 0 9 26 32 6 3 76 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Extremely Unstable - 250Ft-33Ft tDelta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 1.3-18 19-24 > 24 Total N 0 0 2 1 0 .0 3 NNE 0 7 13 0 20 NE 0 4 0 0 4 ENE 0 1 0 0 1 E 0 4 0 0 4 ESE 0 2 0 0 2 SE 0 3 0 0 3 SSE 0 0 0 0 0 S" 0 0 0 0 0 SSW 0 0 1 0 1 SW 0 0 2 0 3 WSW 0 0 3 0 6 W 0 0 9 0 18 WNW 0 0 12 5 0 0 17 NW 1 2 2 0 0 0 5 NNW ,0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 23 44 19 0 0 87 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Moderately Unstable - 250Ft-33Ft-Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 NNE 0 0 16 NE 0 0 5 ENE 0 0 1 E - 0 0 0 "

ESE 0 2 SE 0 0 SSE 0 3 S 0 0 SSW 0 5 SW 0 4 0 5 W. 0 9 WNW 0 6 NW 0 3 NNW 0 0 Variable 0 0 Total 0 13 28 21 0 0 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hoors of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Slightly Unstable - 250Ft-33Ft dblta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N U 1 7 19 NNE 0 14 15 31 NE 1 1 4 7 ENE 1 1 0 2 E 2 0 2 0

ESE 5 0 5 0

SE 2 1 3 0

SSE 3 4 7 0

S 0 0 0 0'

SSW 0 2 3 0

SW o 0 6 8 0

WSW 0 8 10 0

W 0 12 12 0

WNW 3 6 12 0

NW 4 0 6 0

NNW 0 0 0 0

Variable 0 0 0 Total 2 36 65 21 3 0 127 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes:

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Neutral - 25OFt-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 1.3 46 24 94 NNE 2 30 48 14 95 NE 4 21 5 5 35 ENE 1 5 5 3 14 E - 4 6 0 0 10 ESE 2 7 1 0 10 SE 4 15 1 0 20 SSE .7 13 0 22 S 1 3 4 2 10 SSW 0 5 11 5 21 SW 0 6 10 9 25 WSW 0 10 15 8 35 W 0 18 22 0 41 WNW 1 22 28 11 62 NW 0 16 13 13 42 NNW 1 7 4 2 14 Variable 0 0 0 0 0 Total 26 191 226 96 11 0 550 Hours of calm in this stability class: 0 Hours ofmissing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Slightly Stable - 250Ft-33Ft D6lta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 13 35 80 34 6 170 NNE 14 50 41 4 3 112 NE 10 30 11 5 1 57 ENE 8 16 19 3 1 47 E -- 7 15 4 2 0 28 ESE 3 11 1 0 0 15 SE 7 24 3 1 0 35 SSE 7 22 22 6 1 58 S 1 14 17 1 0 33 SSW 5 19 16 10 5 55 SW 2 8 17 13 1 41 WSW 4 21 6 1 0 32 W 5 22 26 0 0 53 WNW 4 14 12 0 0 30 NW 5 21 10 0 0 36 NNW 8 16 3 4 0 31 Variable 0 0 0 0 0 0 Total 103 338 288 84 18 2 833 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all- stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Moderately Stable 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1.3 7 1 0 0 0 21 NNE 3 8 1 0 12 NE 6 11 0 0 17 ENE 5 3 5 0 15 E - 5 2 4 0 11 ESE 5 4 3 0 12 SE 10 6 1 0 18 SSE 2 17 16 0 35 S 8 14 6 0 29 SSW 9 13 0 0 22 SW 17 6 2 0 25 WSW 14 13 1 0 28 W 5 19 0 0 0 0 24 WNW 4 10 0 0 0 0 14 NW 17 12 0 0 0 0 29 NNW 7 4 0 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 1.30 149 40 4 0 0 323 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 0 0 0 0 2 NNE 3 8 0 0 0 0 11 NE 1 0 0 0 0 0 1 ENE 2 0 0 0 0 0 2 E - 2 2 1 0 0 0 5 ESE 1 5 0 0 0 0 6 SE 1 5 4 0 0 0 10 SSE 3 5 4 2 0 0 14 S 9 9 9 1 0 0 28 SSW 19 3 0 0 0 0 22 SW 21 5 0 0 0 0 26 WSW 11 15 0 0 0 0 26 W 13 7 0 0 0 0 20 WNW 9 0 0 0 0 0 9 NW 4 1 0 0 0 0 5 NNW 3 0' 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 104 65 18 3 0 0 190 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Extremely Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 1 3 NNE 0 1i 7 0 20 NE 0 3 0 0 4 ENE 0 0 0 0 2 E - 0 2 0 0 3 ESE 0 1 1 0 4 SE 0 0 0 0 1 SSE 0 0 0 0 0 S 0 0 0 0 0 SSW 0 0 1 0 1 SW 0 0 1 1 2 WSW 0 0 3 2 5 W 0 0 5 11 19 WNW 0 1 6 20 NW 0 1 0 0 3 NNW 0 0 0 0 0 Variable 0 0 0 0 0 Total 0 11 20 25 26 5 87 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0

.Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Moderately Unstable - 250Ft-33Ft*Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 NNE 0 15 NE 0 5 ENE 0 1 E - 0 0 ESE 0 2 SE 0 1 SSE 0 2 S 0 0 SSW 0 4 SW 0 4 WSW 0 6 W 0 9 WNW 0 7 NW 0 2 NNW 0 0 Variable 0 0 Total 0 1 17 24 18 2 . 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 5 4 26 NNE 0 4 11 0 25 NE 0 1 3 0 7 ENE 0 0 0 0 0 E -- 0 2 1 0 3 '

ESE 0 1 3 0 5 SE 0 0 5 0 5 SSE 0 0 1 0 4 S 0 0 2 0 2 SSW 0 0 0 0 3 SW 0 0 0 0 7 WSW 0 0 3 0 11 W 0 0 0 0 12 WNW 0 0 4 6 2 0 12 NW 0 0 2 1 3 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 8. 40 52 23 4 128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Neutral - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-1-8 19-24 > 24 Total N 22 31 43 15 116 NNE 1 19 30 9 4 80 NE 0 6 4 4 1 21 ENE 0 2 3 3 1 18 E 1 4 1 1 0 11 ESE 1 2 1 0 0 7 SE 1 10 3 0 0 22 SSE 1 7 9 0 0 24 S 0 2 2 2 2 9 SSW 0 5 6 6 1 19 SW 0 9 8 6 4 28 WSW 0 6 10 5 9 31 W 0 15 26 1 1 45 WNW 0 19 24 20 0 65 NW 0 9 16 14 1 40 NNW 0 6 4 3 0 14 Variable 0 0 0 0 0 0 Total 6 67 143 178 117 39 550 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Slightly Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4 -7 8-12 13-18 19-24 > 24 Total N 0 6 29 53 44 29 161 NNE 1 18 29 46 10 2 106 NE 3 11 11 16 7 4 52 ENE 4 12 9 10 12 2 49 E - 2 12 8 5 9 6 42" ESE 2 10 8 6 0 2 28 SE 0 10 16 10 2 1 39 SSE 1 13 17 12 12 3 58 S 0 4 2 16 4 0 26 SSW 0 4 7 27 6 13 57 SW 0 0 7 18 20 4 49 WSW 0 2 5 15 4 0 26 W 0 6 6 33 13 0 58 WNW 1 0 3, 19 1 0- 24 NW 0 1 12 23 1 0 37 NNW 1 1 9 7 4 1 23 Variable 0 0 0 0 0 0 0 Total 15 IM0* 178 316 149 67 835 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: .0 Hours of missing stability measurements in all stability classes:. 7

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Moderately Stable - 250Ft-33Ft Oelta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 8-12 13-1.8 19-24 > 24 Total N 0 4 16 2 0 0 22 NNE 0 6 9 2 0 0 1-7 NE 1 10 3 0 0 1 15 ENE 2 9 5 1 1 19 E 1 6 2 7 19 ESE 2 9 3 1 2 20 SE 0 7 5 5 1 18 SSE 3 10 12. 23 2 57 S 0 4 10 9 0 26 SSW 0 2 1 9 0 12 SW 1 3 4 5 0 15 WSW 1 1 3 4 0 9 W 0 4 7 18 0 32 WNW 0 4 3 9 0 0 16 NW 2 0 5  : 13 1 0 21 NNW 0 2 2 2 0 0 6 Variable 0O 0 0 0 0 0 0 Total 13 81 90 104 22 14 324 Hours of calm in this stability class: I Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes:

Zion Nuclear Station Period of Record: April - June 2009 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Directic 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 2 0 0 0 3 NNE 2 3 2 0 0 0 7 NE 2 2 3 1 0 0 8 ENE 2 1 0 0 0 0 3

-1 E 0 3 0 0 1 5S ESE 0 2 0 1 1 1 5 SE 3 4 0 2 0 4 13 SSE 2 4 1 10 4 1 22 S 1 5 11 14 4 2 37 SSW 3 4 7 11 0 0 25 SW 2 3 4 6 0 0 15 WSW 0 1 1 8 6 0 16 W 2 0 1 3 0 0 6 WNW 0 2 4 5 0 0 11 NW 0 1 3 1 0 0 5 NNW 1 3 3 1 0 0 8 Variable 0 0' 0 0 0 0 0 Total 21 36 45 63 15 9 189 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Extremely Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 4 0 0 0 8 NNE 0 26 36 0 0 0 62 NE 1 40 6 0 0 0 47 ENE 0 35 7 0 0 0 42 E 0 33 2 0 0 0 35 ESE 1 39 4 0 0 0 44 SE 0 14 6 0 0 0 20 SSE 0 5 4 0 0 0 9 s 0 2 0 0 0 0 2 SSW 0 0 3 0 0 0 3 SW 0 3 12 8 0 0 23 WSW 0 9 19 1 0 0 29 W 0 11 17 3 0 0 31 WNW 0 20 15 0 0 0 35 NW 1 8 15 0 0 0 24 NNW 0 3 2 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 3 252 152 12 0 0 419 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Moderately Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 1.9-24 > 24 Total N 0 3 1 0 0 0 4 NNE 0 11 3 0 0 0 14 NE 3 3 2 0 0 0 8 ENE 3 2 0 0 0 0 5 E 1 4 0 0 0 0 5 ESE 0 3 0 0 0 0 3 SE 0 6 1 0 0 0 7 SSE 0 4. 3 0 0 0 7 S Q 0 0 0 0 0 0 SSW 0 0 1 1 0 0 2 SW 0 0 4 0 0 0 4 WSW 0 4 3 0 0 0 7 W 0 3 6 1 0 0 10 WNW 0 1 1 0 0 0 2 NW 0 2 6 0 0 0 8 NNW 0 3 1 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 7 49 32 2 0 0 90 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July September 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 8 4 12 NNE 0 9 1 10 NE 3 3 1 7 ENE 4 2 1 7 E 0 7 8 ESE 3 5 1 9 SE 1 13 0 14 3

SSE 0 6 6 12 S 0 1 0 1 1

SSW 0 2 3 5 SW 0 4 11 18 WSW 0 5 3 8 W 0 7 1 11 WNW 1 9 8 18 NW 1 7 2 10 NNW 1 1 1 3 Variable 0 0 0* 0 Total 14 89 44 6 0 0 153 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Neutral - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4 -7 8-12 13-18 19-24 > 24 Total N 5 30 17 0 0 0 52 NNE 7 26 11 0 0 0 44 NE 10 11 4 0 0 0 25 ENE 4 9 4 2 0 0 19 E 2 17 5 0 0 0 24 ESE 5 27 6 0 0 0 38 SE 1 16 4 0 0 0 21 SSE 2 26 21 3 0 0 52 S 3 20 5 0 0 0 28 SSW 3 12 17 1 0 0 33 SW 2. 14 43 7 1 0 67 WSW 5 14 6 0 0 0 25 W 8 31 8 12 0 0 59 WNW 5 40 6 3 0 0 54 NW 7 18 13 6 0 0 44 NNW 4 15 7 0 0 0 26 Variable 0 0 0 0 0 0 0 Total 73 326 177 34 1 0 611 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Slightly Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction j.-3 4-7 8-1.2 13-18 19-24 > 24 Total N 16 35 2 0 0 0 53 NNE 6 14 3 0 0 0 23 NE 6 10 1 0 0 0 17 ENE 4 9 0 0 0 0 13 E 7 2 0 0 0 0 9 ESE 3 4 0 0 0 0 7 SE 6 8 2 0 0 0 16 SSE 3 17 14 2 0 0 36 S 10 31 3 0 0 0 44 SSW 17 17 7 0 0 0 41 SW 11 17 5 0 0 0 33 WSW 10 18 1 0 0 0 29 W 9 33 4 0 0 0 46 WNW 19 13 3 0 0 0 35 NW 12 19 1 0 0 0 32 NNW 9 10 0 0 0 0 19 Variable 0 0 0 0 0 0 0 Total 148 257 46 2 0 0 453 Hours of calm in this stability class: 8 Hours of missing wind measurements in'this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 20309 Stability Class - Moderately Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-1-8 19-24 > 24 Total N 4 5 0 9 NNE 1 0 0 1 NE 0 0 0 0 ENE 0 1 0 1 E 1 0 0 1 ESE 1 3 0 4 SE 3 6 SSE 2 1 5 S 10 14 24 SSW 21 4 25 SW 25 5 30 WSW 34 6 40 W 13 25 38 WNW 17. 10 27 NW 20 7 27 NNW 22 13 35 Variable 0 0 0 Total 174 100 2 0 0 0 276 Hours of calm in this stability class: 2 Hours of missing wind meAsurements in this stabili ty class: 0 Hours of missing stability measurements in all staibili ty classes:. 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Extremely Stable - 25OFt-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13718 1-9-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE I 0 1 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 1

0 0 0 0 E 0 1 0 0 0 0 ESE 0 0 0 1 0 0 0 SE 0 1 2 0 0 0 0 SSE 1 3 4 0 0 0 0 S .2 0 2 0 0 0 0 7 SSW 7 0 O 0 0 0 SW 17 0 17 0 0 0 0 WSW 23 7 30 0 0 0 0 W 37 17 54 0 0 0 0 WNW 36 26 62 0 0 0 0 NW 5 8 13 0 0 0 0 NNW 1 0 1 0 0 0 0 Variable 0 0 0 Total 132 62 1 0 0 0 .195 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Extremely Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-1-8 19-24 > 24 Total N 0 2 3 6 11 NNE 0 14 33 18 65 NE 0 18 17 5 40 ENE 0 23 12 7 42 E 0 18 8 2 28 ESE 0 21 26 2 49 SE 0. 3 13 8 25 SSE 0 1 5 1 7 S 0 0 0 0 0 SSW 0 0 0 1 1 SW 0 1 1 11 20 WSW 0 1 12 10 30 W 0 2 15 12 37 WNW 0 5 15 15 36 NW 1 0 13 8 22 NNW 0 3 2 1 6 Variable 0 0 0 0 0 Total 1 112 175 107 2 419 Hours of calm in this stability class: 0 Hours of missing wind measuremen.ts in this stability class:; 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July September 2009 Stability Class - Moderately Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 4 1 0 0 8 NNE 0 1 7 1 0 0 9 NE 2 1 3 2 0 0 8 ENE 0 3 1 1 0 0 5 E 0 3 3 0 0 0 6 ESE 0 2 2 2 0 0 6 SE 0 SSE 0 7 S 0 0 SSW 0 2 SW 0 4 WSW 0 6 W 0 11 WNW 0 3 NW 0 8 NNW 0 3 Variable 0 0 Total 2 21 34 24 9 0 90 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 10 NNE 0 10 NE 0 5 ENE 0 9 E 1 9 ESE 0 12 SE 0 14 SSE 0 8 S 0 1 SSW 0 2 SW 0 20 WSW 0 10 W 1 11 WNW 0 19 NW 0 9 NNW 1 4 Variable 0 0 Total 3 42 55 38 12 3 153 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Neutral - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 18 22 3 55 NNE 0 19 16 0 43 NE - 14 5 0 22 ENE 0 6 2 4 1.8 E 0 20 5 1 33 ESE 0 15 12 2 38 SE 0 13 9 1 29 SSE 0 17 13 4 48 S 0 16 2 2 24 SSW 0 5 12 1 21 SW 1 3 41 22 74 WSW 0 13 5 5 25 W 1 26 10 8 58 WNW 0 36 19 1 61 NW 0 11 17 9 42 NNW 0 13 6 0 20 Variable 0 0 0 0 0 Total 5 84 245 196 63 18 611 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July September 2009 Stability Class - Slightly Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 1-3-18 19-24 > 24 Total N 0 3 14 15 0 0 32 NNE 1 11 21 7 0 0 40 NE 0 5 14 5 2 0 26 ENE 0 3 6 4 0 0 13 E 1 10 11 2 0 0 24 ESE 0 6 7 5 2 0 20 SE 2 8 4 2 4 0 20 SSE 0 7 15 9 6 0 37 S 0 6 19 14 2 0 41 SSW 0 4 6 17 3 0 30 SW 0 1 9 21 1 0 32 WSW 0 4 16 9 1 0 30 W 0 1 9 23 3 0 36 WNW 0 1 20 14 2 0 37 NW 0 2 9 9 0 0 20 NNW 0 0 10 13 0 0 ,23 Variable 0 0 0 0 0, 0 0 Total 4 72 190 . 169. 26 0 461 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Moderately Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 .19-24 > 24 Total N 0 3 10 8 21 NNE 0 12 12 3 27 NE 0 8 7 0 15 ENE 4 5 0 10 E 1 8 1 1 11 ESE 1 2 I 0 7 SE 0 8 2 0 12 SSE 0 3 3 0 6 S 1 5 13 11 30 SSW 1 9 13 13 36 SW 1 4 10 8 23 WSW 0 1 5 7 14 W 0 2 6 16 28 WNW 0 0 7 11 20 NW 0 1 2 8 11 NNW 0 0 7 0 7 Variable 0 0 0 0 0 Total 6 70 104 86 11 1 278 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: July - September 2009 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-1-8 19-24 > 24 Total 14 0 0 0 N 4 8 26 4 4 0 0 0 NNE 13 21 S 1 0 0 0 NE 2 8 1 0 0 0 ENE 0 2 2 0 0 0 0 E 2 0 2 0 0 0 0 ESE 1 2 3 SE 0 2 0 0 0 2 4 SSE 1 3 1 0 0 0 5 S 0 2 1 2 0 0 5 SSW 0 4 9 9 0 0 22 SW 2 2 8 7 0 0 1.9 WSW 2 3 6 2 0 0 13 W 1 1 5 7 0 0 14 WNW 1 2 5 7 1 0 16 NW 0 1 4 12 0 0 17 NNW 2 3 9 2 0 0 16 Variable 0 0 0 0 0 0 0 Total 25 50 67 48 1 2 . 193 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability, measurements in all stability classes: 0

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Extremely Unstable - 250Ft-33Ft,-Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E -- 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 13 34 6 0 0 53 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Moderately Unstable - 250Ft-33Ft-Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 1.3-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0

- 0 0 0 0 E 0 0 0" 1 0 ESE 0 2 0 0 3 1 0 SE 0 1 0 0 2 0 0 SSE 0 1 0 0 1 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 SW 0 0 4 0 0 0 4 WSW 0 1 5. 0 0 0 6 W 0 0 8 1 0 0 9 WNW 0 2 0. 0' 0 0 2 NW 0 2 0 0 0 0 2 NNW 0 1 3 0 0: 0 4 Variable 0 0 0 0 0 0 0 Total 0 10. 22 1 0 0 33 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: .1 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October December 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0

NNE 0 1 0 0 0 0 1

NE 0 2 0 0 0 0 2

ENE 0 3 0 0 0 0 3

E 0 1 0 3 0 0 4" ESE 0 4 0 0 0 0 4 SE 0 5 4 1 0 0 10 SSE 0 1 3 0 0 0 4 S 0 0 0 0 0 0 0 SSW 0 1 3 0 0 0 4 SW 0 2 6 1 0 0 9 WSW 0 1 4 4 0 0 9 W 0 4 12 2 0 0 18 WNW 0 5 5 1 0 0 11 NW 0 2 2 0 0 0 4 NNW 0 0 3 0 0, 0 3 Variable 0 0 0 0 0 0 0 Total 0 32 42 12 0 0 86 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 3 Hours of missing stability measurements in all staIbili ty classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Neutral - 250Ft-33Ft Delta--T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-1-8 19-24 > 24 Total N 3 6 14 4 0 27 NNE 1 14 9 2 0 26 NE 1 5 22 14 0 42 ENE 0 1 13 12 4 30 E -- 2 10 10 29 15 71 ESE 3 27 24 5 6 65 SE 5 33 25 14 0 77 SSE 4 17 37 20 8 86 S 5 29 11 0 0 45 SSW 8 34 19 3 0 64 SW 4 27 37 20 0 88 WSW 6 43 49 17 1 116 W 2 56 57 19 2 136 WNW 11 32 30 7 0 NW 8 21 25 9 0 63 NNW 8 26 15 3 0 52 Variable 0 0 0 0 0 0 Total 71 381 397 178 36 5 1068 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 85 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Slightly Stable - 250Ft-33Ft Dlta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 11 9 1 0 0 29 NNE 3 8 7 0 0 0 18 NE 1 1 3 0 0 6 ENE 0 2 1 1 0 0 4 E 0 0 5 9 18 2 34 ESE 1 3 3 15 8 0 30 SE 0 15 22 7 0 0 44 SSE 2 4 10 7 4 1 28 S 7 23 15 5 0 0 50 SSW 16 55 25 2 0 0 98 SW 17 37 30 0 0 0 84 WSW 4 36 13 2 0 0 55 W 14 31 13 0 0 0 58 WNW 15 35 13 0 0 0 63 NW 4 32 6 0 0 0 42 NNW 9 21 10 2 0 0 42 Variable 0 0 0 0 0 0 0 Total 101 314 185 52 30 3 685 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Moderately Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 11 1i NNE 1 1 2 NE 0 0 0 ENE 0 0 0 E 0 1 1 ESE 2 0 2 SE 1 3 5 SSE 0 0 3 S 1 2 3 SSW 4 15 20 SW 2 1 3 WSW 10 5 15 W 11, 20 31 WNW 2 4 6 NW 3 4 7 NNW 4 2 6 Variable 0 0 0 Total 41 69 5 0 0 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabil ity c lass: 0 Hours of missing stability measurements in all st abili ty classes:. 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Extremely Stable - 250Ft-33Ft Dhlta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 2 NNE 0 0 ' 0 0 0 NE 1 0 0 0 1 ENE 0 0 0 0 0 E - 0 0 0 0 0 ESE 4 2 0 0 6 SE 1 1 0 0 2 SSE 0 0 0 0 0 S 0 2 2 0 4 SSW 1 1 0 0 2 SW 0 2 0 0 2 WSW 7 4 0 0 0O 0 11 W 7 11 0 0 0 0 18 WNW 6 3 0 0 0 0 9 NW 4 1 0 0 0 0 5 NNW 2 1 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 33 30 2 0 0 0 L 65 Hours of calm in this stability class: 0.

Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Extremely Unstable - 250Ft-33Ft-Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

. Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 0 2 0 2 NE 0 0 0 0 2 ENE 0 1 0 0 1 E - 0 0 0 0 1 ESE 0 1 0 0 1 SE 0 6 1 0 '7 SSE 0 0 0 0 0 S 0 0 0 0 0 SSW 0, 01 1 0 1 SW 0 2 5 0 7 WSW 0 4 4 0 .11 0 0 2 7 2 1 12 WNW 0 0 1 4 1 0 6 NW 0 0 1 0 0' 0 1 NNW 0 0 1 0 0. 0 1 Variable 0 0 0 0 0 0 0 Total 0 3 19 24 6 1 5 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Moderately Unstable - 250Ft-33Ft-Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 1 NE 0 0 0 ENE 0 0 0 E - 0 0 0 ESE 0 0 1 SE 0 0 2 SSE 0 0 0 S 0 0 0 SSW 0 0 0 SW 0 0 0 WSW 0 0 2 W 0 0 0 WNW 0 1 1 NW 0 1 3.

NNW 0 0 2 Variable 0 0 0 Total 0 2 12 17 3 0 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 1 NNE 0 .1 1 0 0 2 NE 0 1 0 0 0 2 ENE 0 0 0 0 1 4 E - 0 0 0 3 0 4.

ESE 0 0 0 0 0 3 SE 0 3 2 0 0 8 SSE 0 3 3 0 0 6 S 0 0 1 0 0 1 SSW 0 1 1 0 0 2 SW 0 3 5 1 0 9 WSW 0 3 4 2 1 10 W 0. 5 9 3 19 WNW 0 3 4 1 0 10 NW 0 3 1 0 5 NNW 0 3 0 0 0 3 Variable 0 0 0 0 0 0 Total 0 14 29. 32 11 3 89 Hours of calm in this stibility class: 0 Hours of missing wind measurements in this stability class: .0 Hours of missing, stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Neutral 250Ft-33Ft Delta"T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 10 9 3 2 27 NNE 0 3 8 8 12 0 31 NE 0 2 7 1-7 14 16 56 ENE 0 3 2 11 19 22 57 E - 1 5 6 13 19 25 69 ESE r 8 15 16 11 16 67 SE 2 14 13 19 14 8 70 SSE 0 6 23 30 7 12 78 S 3 11 19 17 14 2 66 SSW 2 10 25 17 6 2 62 SW 1 12 25 29 16 7 90 WSW 0 7 30 41 18 12 108 W 1 7 47 53 20 15 143 WNW 0 11 35 17 18 0 81 NW 3 9 16 34 14 3 79 NNW 1 8 16 26 4. 0 55 Variable 0' 0 0 0 0. 0' 0 Total 16 118 297 357 209 142 1139 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 14 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Slightly Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 7 6 2 0 21 NNE 4 6 19 2 0 33 NE 1 0 7 1 1 11 ENE 3 2 2. 2 0 10 E -- 1 1 0 6 14 23 ESE 0 2 1 2 2"1 28 SE 0 5 0 4, 8 18 SSE 1 7 8 6 9 34 S 0: 19 36 17 2 75 SSW 2 29 35 14 0 87 SW 0 26 38 15 0 85 WSW 0 22 22 3 1 52 W 2 21 27 3 1 57 WNW 0 9 19 10 0 39 NW 1 8 35 1 0 47 NNW 3 17 25 3 0 54 Variable 0 0 0 0 .0 .0 Total 21 44 181 280 91 57 674 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 20 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October December 2009 Stability Class - Moderately Stable - 25OFt-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 2 NNE 0 4 5 10 NE 1 0 1 7 ENE 0 0 0 1 E - 0 0 1 1 ESE 0 0 1 1 SE 0 0 0 0 SSE 0 1 3 7 S 1 3 7 17 SSW 1 0 6 11 SW 0 0 3 6 WSW o o 4 8 W o 0 14 17 WNW 0 0 17 19 NW 0 1 2 6 NNW 0 2 0 2 Variable 0 0 0 0 Total 3 12 34 65 0 '115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

Zion Nuclear Station Period of Record: October - December 2009 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 2 NNE 1 2 0 9 NE 1 1 0 2 ENE 1 2 0 5 E - 0 0 0 0 1 ESE 0 2 0 2 SE 0 1 0 1 SSE 0 2 0 4 S 0 1 0 5 SSW 0 0" 0 3 SW 0 *0 0 4 WSW 0 2 0 4 W 0. 2 0 8 WNW 0 1 0 9 NW 0 0 0 6 NNW 0 0 0 1 Variable 0 0 0 0 Total 3 17 28 13 4 0 65 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Docket No: 50-295 50-304 ZION NUCLEAR POWER STATION UNITS I and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2009 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Zion Nuclear Power Station Zion, IL 60099 May 2010

Table Of Contents

1. Sum m ary and Conclusions ......................................................................................... 1 II. In tro d u ctio n .......................................... ................... ....................................................... 3 A. O bjectives of the RG PP .................................................................................. 3 B. Im plem entation of the O bjectives ................................................................... 3 C. Program Description ...................................................................................... 4 D. Characteristics of Tritium (H-3) ....................................................................... 5 Ill. Program Description ............................................... .......................................... 5 A. Sam ple Analysis ............................................................................................. 5 B. Data Interpretation ........................................................................................... 6 C. Background Analysis ....................................................................................... 7

1. Background Concentrations of Tritium ................................................. 8 A. G roundwater and Surface W ater Results ...................................................... 10 B. Drinking W ater W ell Survey .......................................................................... 10 C. Summary of Results - Inter-laboratory Comparison Program ...................... 10 D. Leaks, Spills, and Releases .......................................................................... 10 E . T re n d s .............................................................................................................. . 10 F. Investigations .................................................................................................. 11 G . Actions Taken ................................................................................................ 11

Appendices Appendix A Location Designation Tables Table A-i: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2009 Figures Figure A-i: Radiological Groundwater Protection Program Groundwater and Surface Water Locations of the Zion Nuclear Power Station, 2009 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

Table B-11.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2009.

ii

I. Summary and Conclusions In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of Zion Nuclear Power Station. This is the second in a series of annual reports on the status of the Radiological Groundwater Protection Program (RGPP) conducted at Zion Nuclear Power Station. This report covers both groundwater and surface water samples, collected from the environment, on station property in 2009.

During that time period, 18 analyses were performed on 18 samples from eight locations. Phase 1 of the monitoring was part of a comprehensive study initiated by Exelon to determine whether groundwater or surface water at and in the vicinity of Zion Nuclear Power Station had been adversely impacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public on an Exelon web site http://www.exelencorp.com/ourcompanies/powergen/nuclear/Tritium.htm].

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater and surface water locations selected during Phase 1. All analytical results from Phase 2 monitoring are reported herein.

In assessing all the data gathered for this report, it was.concluded that the operation of Zion Nuclear Power Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at Zion Nuclear Power Station.

Gamma-emitting radionuclides were not analyzed in 2009.

Strontium-89/90 was not analyzed in 2009.

Tritium was not detected in any of the groundwater or surface water samples analyzed in 2009. In the case of tritium, Exelon specified that it's laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

Intentionally left blank I!. Introduction The Zion Nuclear Power Station (ZNPS), consisting of two 1100 MWt pressurized water reactor owned and operated by Exelon Corporation, 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 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 Environmental Inc. (Midwest Labs) on samples collected in 2006.

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

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

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

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

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

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives The objectives identified have been implemented at Zion Nuclear Power Station as discussed below:

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

http://www.exeloncorp.com/ourcompanies/powercjen/nuclear/Tritiu m.htm

2. The Zion Nuclear Power Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3. Zion Nuclear Power Station will continue to perform routine sampling and radiological analysis of water from selected locations.

4. Zion Nuclear Power Station has implemented new procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

5. Zion Nuclear Power Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

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

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Groundwater samples were collected. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures.

Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

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

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-10 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body'relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Zion Nuclear Power Station RGPP in 2009.

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

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater and surface water.

3. Concentrations of tritium in groundwater and surface water.

B. Data Interpretation The radiological 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.

Several factors were important in the interpretation of the data:

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

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

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

Analytical uncertainties are reported at the 95% confidence level in thisreport for reporting consistency with the AREOR.

C. Background Analysis A pre-operiational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Zion Nuclear Power Nuclear Power Station, Commonwealth Edison Company, Annual Report 1973, May 1974.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

Tritium levels in Lake Michigan water were studied in the vicinity of Zion Station throughout 1970. The concentration of tritium in the surface water samples from the Lake at Zion ranged from approximately 311 +/- 20 pCi/L to 374 +/- 34 pCi/L and averaged 340 pCi/L. There was no statistical difference in average tritium concentrations among the stations (eight stations from Kenosha to Waukegan).

Prior to 1998, surface water samples were collected at the following six locations along Lake Michigan:

o Kenosha, Wisconsin (intake located 10 miles north of the station) o Lake County Public Water District (intake located 1.1 miles north of the Station) o Waukegan, Illinois (intake located 6 miles south of the Station)

• North Chicago, Illinois (intake located 10 miles south of the Station) o Great Lakes NTS (intake located 13 miles south of the Station)

• Lake Forest, Illinois (intake located 16.5 miles south of the Station)

After 1998, surface water samples were collected at the following four locations along Lake Michigan:

o Kenosha; Wisconsin (intake located 10 miles north of the station) o Lake County Public Water District (intake located 1.1 miles north of the Station)

• Waukegan, Illinois (intake located 6 miles south of the Station)

Lake Forest, Illinois (intake located 16.5 miles south of the Station)

Lake Michigan surface water data are collected as part of the REMP.

Tritium concentrations in surface water samples from Lake Michigan ranged from non-detect to 660 pCi/L. :

Groundwater was collected from one off-site well on a quarterly basis:.

Gamma isotopic, radiostrontium and tritium analyses were performed on all samples. Strontium-89, strontium-90, tritium and gamma emitters v.were below their respective LLDs.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006).

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2006.

RadN'etiprovides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that were elevated in tritium.

c. Surface Water Data Tritium concentrations are routinely measured in large surface water bodies,, including Lake Michigan and the Mississippi River. Illinois surface Water data were typically less than 100 pCi/L.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound On each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion

-A. Groundwater and Surface Water Results Groundwater and Surface Water Samples were collected from on -site wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-1.1, Appendix B) (Table B-Il.1, Appendix B). Tritium was not detected in any of the groundwater or surface water samples analyzed. Zion Nuclear Power Station does not have any off-site wells and therefore there is no risk to off-site users.

Strontium Strontium-90 was not analyzed in 2009. (Table B-1.1, Appendix B)

(Table B-Il.1, Appendix B)

Gamma Emitters Gamma-emitting radionuclides were not analyzed in 2009.

(Table B-I.2, Appendix B) (Table B-Il.1, Appendix B)

B. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the Zion Nuclear Power Station.

C. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and Environmental Inc. (Midwest Labs) are presented in the AREOR.

D. Leaks, Spills, and Releases There were no leaks, spills or releases.

E. Trends There are no previously identified plumes therefore there are no trends.

F. Investigations Conclusions from the Phase 1 report have been rnade available to state and federal regulators as well as the public on an Exelon web site:

http://www.exeloncorp. com/ourco-npanies/powergen/lnuclear/Tritium.htm.

G. Actions Taken

1. Compensatory Actions There have been no station events requiring compensatory actions at the Zion Nuclear Power Station.

2. Installation of Monitoring Wells No new wells were required to be installed.

3. Actions to Recover/Reverse Plumes There have been no station events requiring actions to recover/reverse any plumes.

Intentionally left blank APPENDDX A LOCATION & DIRECTION

ATTACHMENT I Sampling Locations for the Radiological Groundwater Protection Program, Zion Station, 2009.

Site Site Type Temporary/Permanent Distance MW-ZN-0 IS Monitoring Well Permanent On-Site MW-ZN-02S Monitoring Well Permanent On-Site MW-ZN-03S Monitoring Well Permanent On-Site MW-ZN-04S Monitoring Well Permanent On-Site MW-ZN-05S Monitoring Well Permanent On-Site MW-ZN-06S Monitoring Well Permanent On-Site MW-ZN-07S Monitoring Well Permanent On-Site MW-ZN-08S Monitoring Well Permanent On-Site MW-ZN-09S Monitoring Well Permanent On-Site MW-ZN-1i S Monitoring Well Permanent On-Site MW-ZN-11 S Monitoring Well Permanent On-Site SW-ZN-1 Surface Water Lake Michigan On-Site SW-ZN-2 Surface Water Lake Michigan On-Site A-,i

Figure A-1 Radiological Ground Water Protection Program Groundwater and Surface Water Locations of the Zion Station, 2009 A-2

APPENDIX B DATA TABLES

TABLE B-1.2 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Mw-ZN-OlS 05/04/09 TBE < 161 MW-ZN-0IS 05/04/09 EIML < 163 MW-ZN-01 S 09/21/09 < 178 MW-ZN-02S 05/04/09 < 160 MW-ZN-02S 09/21/09

• 173 MW-ZN-03S 05/04/09 < 160 MW-ZN-03S 09/21/09 < 178 MW-ZN-04S 05/04/09 < 158 MW-ZN-04S 09/21/09 TBE < 178 MW-ZN-04S 09/22/09 EIML

• 144 MW-ZN-09S 05104/09 < 155 MW-ZN-09S 09/21/09 < 178 MW-ZN-10S 05/04/09 < 157 MW-ZN-10S 09/21/09 < 180 MW-ZN-1 IS 05/04/09 < 154 MW-ZN-11 S 09/21/09 < 180 B-1

TABLE B-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SW-ZN-1 051/0/09 < 156 SW-ZN-2 09/21/09 < 178 B-2