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Annual Radiological Environmental Operating Report, January 1 Through December 31, 2008
	ML091390227
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	05/31/2009
From:	; Exelon Nuclear, Teledyne Brown Engineering Environmental Services
To:	; Office of Nuclear Reactor Regulation
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NRC Docket No: 50-295 50-304 ZIMON NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Zion Nuclear Power Station Zion, IL 60099 May 2009

Table Of Contents I. Sum m ary and Conclusions ............................................................................................. 1 II. In tro d u c tio n ........................................................................................................................ 3 A. Objectives of the REM P .................................................................................... 3 B. Im plem entation of the Objectives ....................................................................... 3 Ill. Program Description; ................................................................................................... 3 A. Sam ple Collection ............................................................................................. 3 B. Sam ple 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. Fish ........................................................................................................ 8

3. Sedim ent .................................................................................................. 8 B. Atm ospheric Environm ent .................................................................................. 9

1. Airborne ................................................................................................. 9

a. Air Particulates ........................................................................... 9 C. Am bient Gam m a Radiation ................................................................................ 9 D. Land Use Survey ............................................................................................. 10 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, 2008 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-I: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2008 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2008 Figures Figure B-1: Inner Ring TLD Locations and Fixed Air Samplers of the Zion Nuclear Power Station, 2008 Figure B-2: Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2008 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, 2008 Table C-1.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table C-1.3 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table C-I1.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

ii

Table C-111.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table C-IV.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

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, 2008.

Table C-IV.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table C-V.1 Quarterly TLD Results for Zion Nuclear Power Station, 2008.

Table C-V.2 Mean Quarterly TLD Results for the Inner and Other Locations for Zion Nuclear Power Station, 2008.

Table C-V.3 Summary of the Ambient Dosimetry Program for Zion Nuclear Power Station, 2008.

Figures Figure C-1 Public Water - Gross Beta - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2008.

Figure C-2 Public Water - Gross Beta - Stations Z-1 6 and Z-1 8 Collected in the Vicinity of ZNPS, 2000 - 2008.

Figure C-3 Public Water - Tritium - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2008.

Figure C-4 Public Water - Tritium - Stations Z-16 and Z-18 Collected in the Vicinity of ZNPS, 2000 - 2008.

Figure C-5 Air Particulates - Gross Beta - Stations Z-01 and Z-02 Collected in the Vicinity of ZNPS, 2000 - 2008.

Figure C-6 Air Particulate - Gross Beta - Station Z-03 Collected in the Vicinity of ZNPS, 2000 - 2008.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2008 iii

Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2008 Table D-4 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2008 Table D-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2008 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) iv

1. 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 2008 through 31 December 2008. 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. No Cs-137 activity was detected in fish. No Cs-137 was detected in sediment samples. No plant produced fission 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 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), Global Dosimetry, and Environmental Inc. (Midwest Labs) on samples collected during the period 1 January 2008 through 31 December 2008.

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 2008. 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, burbot, salmon, bluegill, and smallmouth bass 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 2008. 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-1 34, 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 2008 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 2008.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date TLD Z-301 Second Quarter No sample; vendor failed to complete check-off sheet for collection.

A Z-02 12/03/08 No sample, sample pump had electrical short.

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 2008.

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 2.0 pCi/I to 8.1 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 comprised of lake trout, burbot, salmon, bluegill, and smallmouth bass 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).

No 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

<5 E-3 pCi/m 3 to 36 E-3 pCi/m 3 with a mean of 18 E-3 pCi/m 3 . Comparison of the 2008 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 16 mR/quarter to 30 mR/quarter.

D. Land Use Survey A Land Use Survey conducted during August 2008 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 C NE D ENE EE F ESE GSE H SSE JS K SSW 1.9 L SW 1.1 M WSW 1.0 NW 1.1 P WNW 1.0 Q NW 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%). Ifthe bias is greater than 30%, the results are deemed not acceptable.

For the primary laboratory, 16 out of 18 analytes met the specified acceptance criteria. Two samples did not meet the specified acceptance criteria for the following reasons:

1. Teledyne Brown Engineering's Analytics December 2008 Sr-89 in milk result of 18.0 pCi/L was higher than the known value of 12.6 pCi/L, resulting in a found to known ratio of 1.43. NCR 09-02 was initiated to investigate this failure.

2. Teledyne Brown Engineering's Analytics' ERA Quik Response water sample January 2008 Sr-89 result of 37.33 pCi/L exceeded the upper acceptance limit of 25.2 pCi/L. No cause could be found for the failure. Studies bracketing these results, RAD 71 and RAD 72 had acceptable Sr-89 results. NCR 08-03 For the secondary laboratory, all of the 15 analytes met the specified acceptance criteria.

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, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 GR-B 48 4 4 3.5 4.2 Z- 16 INDICATOR 0 (PCIILITER) (20/24) (18/24) (10/12) WAUKEGAN WATER WORKS (2.0/8.1) (2.4/5.4) (2.0/8.1) 6.1 MILES S 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 N/A <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 IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 ZR-95 15 <LLD <LLD 0 (PCI/LITER)

CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 FISH GAMMA 7 (PCI/KG WET) MN-54 130 <LLD NA 0 CO-58 130 <LLD NA 0 FE-59 N/A <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, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA CS-134 100 <LLD NA 0 CS-137 100 <LLD NA 0 BA-140 NA <LLD NA 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-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 GAMMA 2 (PCI/KG DRY) MN-54 NA <LLD NA 0 CO-58 NA <LLD NA FE-59 NA <LLD NA 0 CO-60 NA <LLD NA ZN-65 NA <LLD NA 0 NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA CS-134 150 <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, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 155 10 18 NA 18 Z-01 INDICATOR 0 (E-3 PCI/CU.METER) (154/155) (52/52) ONSITE 1 (5/36) (5/33) 0.3 MILES S OF SITE GAMMA 12 MN-54 NA <LLD NA CO-58 NA <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, 2008 Name of Facility: ZION DOCKET NUMBER: 50-295 & 50-304 Location of Facility: ZION IL REPORTING PERIOD: ANNUAL 2008 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 20.3 NA 24.5 Z-301-2 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (144/144) (4/4)

(16/30) (20/29) 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-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2008 Location Location Description Distance & Direction From Site A. Public Water Z-14 Kenosha Water Works (control) 10.0 miles N Z-15 Lake County Water Works (indicator) 1.4 miles NNW Z-16 Waukegan Water Works (indicator) 6.1 miles S Z-18 Lake Forest Water Works (control) 12.9 miles S B. Air Particulates Z-01 Onsite 1 (indicator) 0.3 miles S Z-02 Onsite 2 (indicator) 0.2 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-1 10-1 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

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2008 Sample Analysis Sampling Method Analytical Procedure Number Medium Public Water Gamma Spectroscopy Monthly composite from TBE, TBE-2007 Gamma emitting radioisotope weekly grab samples. analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Public Water Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta 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 Water Tritium Quarterly composite from TBE, TBE-201 1 Tritium analysis in drinking water by weekly grab samples. liquid scintillation Env. Inc., T-02 Determination of tritium in water (direct method)

Fish Gamma Spectroscopy Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis collected via electroshocking or other techniques Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope 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 filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Gamma Spectroscopy Quarterly composite of each TBE, TBE-2007 Gamma emitting radioisotope Particulates 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

A AV omanitrng LoWAtn

-FixWRig L M AwanIir Lpbn 1

42 Oitc?4oW 2 Wtstsido 03 .... . ... . . ....

I Figure B-1 Inner Ring TLD Locations and Fixed Air Samplers of the Zion Nuclear Power Station, 2008 B-3

4Z-5L 4J'=AyIWM" WtkI

'i -kd" WAWpaft 1, L Wk 4xU.

-Mwe'mBh5 VD, -a Naidfi (C I-27Lake Figure B-2 Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2008 B-4

APPENDIX C DATA TABLES PRIMARY LABORATORY

TABLE C-1.1 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Z-14 Z-1 5 Z-16 Z-18 PERIOD 01/02/08 01/30/08 3.5 +/- 1.5 4.1 +/- 1.5 3.2 +/- 1.4 4.3 +/- 1.5 02/07/08 02/28/08 5.4 +/- 2.7 4.4 +/- 2.6 8.1 +/- 2.9 4.3 +/- 2.6 03/06/08 03/27/08 2.9 +/- 1.5 3.4 +/- 1.6 4.8 +/- 1.7 4.7 +/- 1.7 04/02/08 04/30/08 4.3 +/- 1.5 4.3 +/- 1.5 4.0 +/- 1.5 2.8 +/- 1.4 05/07/08 05/28/08 < 2.6 4.2 +/- 2.3 5.3 +/- 2.4 3.4 +/- 2.2 06/04/08 06/26/08 3.1 +/- 1.7 3.1 +/- 1.7 3.3 +/- 1.7 2.8 +/- 1.7 07/02/08 07/30/08 < 2.4 < 2.3 2.4 +/- 1.7 <2.4 08/06/08 08/27/08 < 2.3 2.4 +/- 1.6 < 2.2 4.5 +/- 1.9 09/03/08 09/24/08 2.9 +/- 1.4 2.0 +/- 1.4 2.0 +/- 1.3 2.4 +/- 1.4 10/01/08 10/29/08 2.7 +/- 1.6 4.5 +/- 1.8 3.5 +/- 1.7 2.4 +/- 1.6 11/06/08 11/26/08 < 2.4 < 2.4 < 2.4 < 2.3 12/03/08 12/30/08 3.5 +/- 1.5 5.2 +/- 1.6 5.3 +/- 1.6 3.3 +/- 1.5 MEAN 3.5 +/- 1.8 3.8 +/- 2.1 4.2 +/- 3.5 3.5 +/- 1.8 TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION Z-14 Z-1 5 Z-16 Z-18 PERIOD 01/02/08 - 03/27/08 161 161 < 166 < 170 04/02/08 - 06/26/08 187 190 < 193 < 194 07/02/08 - 09/24/08 168 173 < 176 < 174 10/01/08 - 12/30/08 180 182 < 181 < 186 MEAN

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

TABLE C-I.3 CONCENTRATIONS OF GAMMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED INTHE VICINITY OF ZION NUCLEAR POWER STATION, 2008 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-1 34 Cs-1 37 Ba-140 La-140 PERIOD Z-14 01/02/08 - 01/30/08 < 1 <1 <3 <1 <2 <1 <2 <1 <1 <16 <6 02/07/08 - 02/28/08 < 4 <4 <9 <4 <9 <6 <8 <4 <4 < 39 < 14 03/06/08 - 03/27/08 < 3 <3 <7 <3 <5 <4 <6 <3 <3 < 19 <5 04/02/08 04/30/08 < 8 <8 < 17 <8 < 17 <8 < 15 <9 <9 < 37 < 13 05/07/08 - 05/28/08 < 2 <2 <4 <2 <3 <2 <3 <2 <2 < 12 <4 06/04/08 - 06/26/08 < 1 <1 <3 <1 <3 <2 <3 <1 <1 < 17 <6 07102/08 - 07130/08 < 1 <1 <3 <1 <2 <1 <3 <1 <1

23 <6 08/06/08 - 08/27/08 < 2 <3 <6 <2 <4 <3 <4 <2 <2 < 33 <9 09/03/08 - 09/24/08 < 1 <2 <4 <1 <2 <2 <3 <1 <1

23 <9 10/01/08 - 10/29/08 < 4 <6 < 19 <6 <9 <7 < 12 <4 <4 < 168 < 62 cm 11/06/08 - 11/26/08 < 2 <3 <6 <2 <4 <3 <4 <2 <2 < 37 < 13 12/03/08 - 12/30/08 < 2 <2 <5 <2 <4 <2 <4 <2 <2

23 <7 MEAN Z-15 01/02/08 - 01/30/08 <1 <1 <3 <1 <2 <1 <2 <1 <1 <18 <6 02/07/08 - 02/28/08 <5 <7 < 14 <6 <13 <8 < 10 <6 <6 < 53 <19 03/06/08 - 03/27/08 <6 <5 < 10 <7 < 10 <5 < 10 <4 <5 < 35 <5 04/02/08 - 04/30/08 <4 <5 < 12 <6 < 13 <5 <10 <6 <6 < 28 <5 05/07/08 - 05/28/08 <2 <2 <5 <2 <4 <2 <4 <2 <2

14 <5 06/04/08 - 06/26/08 <2 <2 <4 <2 <3 <2 <3 <1 <2

21 <7 07/02/08 - 07/30/08 <1 <1 <3 <1 <2 <1 <2 <1 <1 <19 <6 08/06/08 - 08/27/08 <2 <2 <6 <2 <4 <3 <5 <2 <2 < 34 < 11 09/03/08 - 09/24/08 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 39 < 14 10/01/08 - 10/29/08 <5 <5 < 18 <4 < 10 <6 < 11 <4 <5 < 182 < 72 11/06/08 - 11/26/08 <2 <3 <6 <2 <4 <3 <5 <2 <2 < 47 < 13 12/03/08 - 12/30/08 <2 <3 <7 <2 <5 <3 <5 <2 <2

27 <9 MEAN

TABLE C-1.3 CONCENTRATIONS OF GAMMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 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 01/02/08 -01/30/08 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 1 <-1 < 17 <6 02107108 -02128/08 <6 < 5 < 13 < 7 < 11 < 6 <9 < 5 < 5 < 46 < 17 03/06/08 -03/27/08 < 5 < 5 < 11 < 5 < 9 < 5 < 9 <4 < 5 < 25 < 9 04102/08-04/30/08 <8 < 8 < 16 < 9 < 18 < 8 < 14 < 10 < 8 < 38 < 13 05/07/08 -05/28/08 <2 <2 < 5 < 2 <4 < 2 < 4 < 2 < 2 < 16 <4 06/04/08 -06/26/08 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 1 < 2 < 20 < 6 07/02/08 -07/30/08 <1 <1 < 3 < 1 < 2 < 1 < 2 < 1 < 1 < 21 < 6 08/06/08 -08/27/08 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 2 <2 < 26 < 8 09/03/08 -09/24/08 <2 < 3 < 6 < 2 < 4 < 3 < 5 < 2 < 2 < 46 < 15 10/01/08 -10/29/08 <4 < 5 < 18 < 4 < 7 < 7 < 11 <4 < 5 < 197 < 52 11/06/08 -11/26/08 <2 < 3 < 6 < 2 < 5 < 3 < 5 < 2 <2 < 43 < 12 12/03108 -12/30/08 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 1 <1 < 18 < 6 MEAN - - - - - - - - -

Z-18 01/02/08-01/30/08 < 1 < 1 < 3 < 1 <2 < 1 < 2 < 1 < 1 < 17 < 6 02/07/08 -02/28/08 < 6 < 8 < 18 <4 < 12 < 8 < 13 < 7 < 8 < 54 < 14 03/06/08 -03/27/08 <4 < 2 < 7 < 4 < 6 < 4 < 6 < 3 < 3 < 26 < 8 04/02/08 -04/30/08 < 5 <4 < 11 < 7 < 8 <6 < 10 < 5 < 5 <28 < 9 05/07/08 -05/28/08 <2 <2 < 5 <2 < 4 <2 <4 < 2 < 2 < 16 < 5 06/04/08 -06/26/08 < 2 <2 < 4 < 2 < 3 < 2 < 4 < 1 < 2 < 22 < 7 07/02/08 - 07/30/08 < 1 < 1 < 3 <1 < 2 < 1 < 2 < 1 < 1 < 26 < 8 08/06/08 -08/27/08 < 2 < 2 < 5 <2 < 4 < 3 < 4 < 2 < 2 < 33 < 10 09/03/08 -09/24/08 <2 < 2 < 6 <2 < 4 < 2 <4 < 2 < 2 < 43 < 13 10/01/08 - 10/29/08 < 4 < 5 < 15 < 4 < 9 < 6 < 11 < 4 < 3 < 160 < 47 11/06/08 -11/26/08 < 1 <2 < 4 < 1 < 3 < 2 < 3 < 2 < 2 < 31 < 12 12/03/08 - 12/30/08 < 1 <2 < 4 <1 < 3 < 2 < 3 < 1 < 2 < 20 < 6 MEAN

TABLE C-11.1 CONCENTRATIONS OF GAMMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 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 05/28/08 < 52 < 60 < 118 < 46 < 123 < 62 < 121 < 48 < 51 < 901 319 Salmon 06/11/08 < 46 < 58 < 149 < 56 < 127 < 63 < 106 < 51 < 61 < 456 147 Bluegill/Smallmouth 10/22/08 < 55 < 64 < 131 < 48 < 136 < 72 < 117 < 52 < 52 < 828 296 MEAN Z-27 Burbot 05/14/08 < 60 < 61 < 173 < 54 < 106 < 71 < 135 < 48 < 62 < 2010 672 Lake Trout 05/14/08 < 56 < 71 < 206 < 50 < 156 < 70 < 144 < 59 < 54 < 2110 845 Burbot 10/24/08 < 43 < 49 < 103 < 38 < 72 < 59 < 87 < 37 < 34 < 997 327 Lake Trout 10/24/08 < 36 < 49 < 116 < 32 < 87 < 54 < 78 < 34 < 43 < 956 299 MEAN

TABLE C-II1.1 CONCENTRATIONS OF GAMMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED INTHE VICINITY OF ZION NUCLEAR POWER STATION, 2008 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 05/28/08 < 43 < 39 < 102 < 45 < 87 < 43 < 76 < 33 < 38 < 239 < 79 10/29/08 < 36 < 39 < 107 < 33 < 78 < 46 < 70 < 27 < 34 < 800 < 211 MEAN

TABLE C-IV.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I PERIOD L-U 1 Z-02 L U03 U1/02/08~ 01/09/08i 22 +/- 4 18 +/- 4 17 +/-4 01/09/08 01/16/08 30 +/- 5 31 +/- 5 31 +/-5 01/16/08 01/23/08 26 +/- 5 26 +/- 5 23 +/-4 01/23/08 01/30/08 29 +/- 5 31 +/- 5 36 5 01/30/08 02/07/08 17 +/- 4 16 +/- 4 16 +/-4 02/07/08 02/14/08 32 +/- 5 33 +/- 5 30 +/-5 02/14/08 02/21/08 21 +/- 4 23 +/- 5 23 +/-5 02/21/08 02/28/08 14 +/- 4 16 +/- 4 17 +/- 4 02/28/08 03/06/08 22 +/- 4 21 +/- 4 19 +/- 4 03/06/08 03/13/08 20 +/- 4 20 +/- 4 20 +/- 4 03/13/08 03/20/08 12 +/- 4 12 +/- 4 13 +/- 4 03/20/08 03/27/08 16 +/- 4 15 +/- 4 18 +/- 4 03/27/08 04/02/08 19 +/- 6 12 +/- 4 <5 04/02/08 04/09/08 15 +/- 4 19 +/- 4 16 +/- 4 04/09/08 04/16/08 9+/-3 10 +/- 4 8+/-3 04/16/08 04/23/08 19 +/-4 14 +/- 4 14 +/-4 04/23/08 04/30/08 24 +/-5 16 +/- 4 18 +/-4 04/30/08 05/07/08 20 +/-4 23 +/- 5 17 +/-4 05/07/08 05/14/08 8+/-3 8+/-3 9+/-4 05/14/08 05/21/08 9+/-3 8+/-3 13 +/-4 05/21/08 05/28/08 5+/-3 5+/-3 8+/-3 05/28/08 06/04/08 12 +/-4 10 +/-4 10 +/-4 06/04/08 06/11/08 9+/-4 6+/-3 6+/-3 06/11/08 06/18/08 11 +/-4 8+/-3 9+/-4 06/18/08 06/26/08 12 +/-3 11 +/-3 11 +/-3 06/26/08 07/02/08 19 +/-5 15 +/-4 12 +/-4 07/02/08 07/10/08 12 +/-3 10 +/-3 12 +/-3 07/10/08 07/16/08 14 +/-4 14 +/-4 16 +/- 4 07/16/08 07/23/08 15 +/-4 19 +/-4 19 +/- 4 07/23/08 07/30/08 15 +/- 4 10 +/-4 17 +/- 4 07/30/08 08/06/08 19 +/- 4 14 +/-4 14 +/- 4 08/06/08 08/13/08 10 +/- 3 10 +/-3 12 +/-3 08/13/08 08/20/08 14 +/- 4 17 +/-4 14 +/-4 08/20/08 08/27/08 17 +/- 4 15 +/- 4 19 +/-4 08/27/08 09/03/08 26 +/- 5 23 +/- 5 26 +/-5 09/03/08 09/10/08 17 +/- 4 15 +/- 4 14 +/-4 09/10/08 09/17/08 15 +/- 4 11 +/-4 13 +/-4 09/17/08 09/24/08 33 +/- 5 30 +/-5 34 +/-5 09/24/08 10/01/08 26 +/- 5 28 +/-5 21 +/-4 10/01/08 10/08/08 13 +/- 4 14 +/-4 15 +/-4 10/08/08 10/15/08 19 +/- 4 21 +/-4 22 +/-4 10/15/08 10/22/08 13 +/- 4 11 +/-4 12 +/-4 10/22/08 10/29/08 17 +/- 4 16 +/-4 19 +/-4 10/29/08 11/06/08 29 +/- 5 26 +/-4 29 +/-5 11/06/08 11/12/08 10 +/- 4 9+/-4 9+/-4 11/12/08 11/19/08 17 +/- 4 16 +/- 4 15 +/-4 11/19/08 11/26/08 13 +/- 4 18 +/- 4 17 +/-4 11/26/08 12/03/08 23 +/- 5 17 +/-4 20 +/-4 12/03/08 12/10/08 17 +/- 4 (1) 19 +/-4 12/10/08 12/17/08 23 +/- 5 23 +/-7 22 5 12/17/08 12/23/08 33 +/- 6 25 +/-5 30 +/-5 12/23/08 12/30/08 33 +/- 5 30 +/-5 30 +/-5 MEAN 18 +/-14 17 +/-14 18 +/-14

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-6

TABLE C-IV.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF E-3 PCIICU METER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-1 34 Cs-137 Ba-140 La-140 PERIOD Z-01 01/02/08 - 04/02/08 <1 <3 <7 <2 <6 <4 <6 <3 <2

76 < 34 04/02/08 - 07/02/08 <3 <5 <5 <3 <8 <5 <8 <4 <3

109

21 07/02/08 - 10/01/08 <2 <6 < 19 <2 <<6 <5 < 10 <3 <2 < 2050

783 10/01/08" - 12/30/08 <2 <2 <6 <3 <5 <2 <5 <2 <2 < 33 < 15 MEAN Z-02 01/02/08 - 04/02/08 <2 <3 <8 <3 <7 <4 <6 <2 <3 < 115 < 34 04/02/08 - 07/02/08 <3 <3 <6 <2 <6 <3 <5 <3 <2 < 60

23 07/02/08 - 10/01/08 <3 <4 < 23 <3 <7 <9 < 13 <3 <3 < 2170 < 1150

-., 10/01/08 - 12/30/08 <4 <3 <11 <4 < 10 <5 <6 <4 <3 < 55 < 25 MEAN Z-03 01/02/08 - 04/02/08 <3 <3 <9 <3 <7 <4 <7 <2 <2 < 104 < 52 04/02/08 - 07/02/08 <4 <4 < 10 <4 <7 <5 < 10 <4 <4 < 98 < 26 07/02/08 - 10/01/08 <2 <5 < 16 <2 <6 <5 <8 <2 <2 < 1830 < 886 10/01/08 - 12/30/08 <3 <3 <7 <2 <4 <3 <5 <2 <2 <31 < 11 MEAN

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, 2008 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - ONSITE LOCATIONS COLLECTION MIN MAX MEAN +

PERIOD 2SD 01/02/08 - 01/30/08 17 36 27 12 01/30/08 - 02/28/08 14 33 21 14 02/28/08 - 04/02/08 <5 22 <17 8 04/02/08 - 04/30/08 8 24 15 9 04/30/08 - 05/28/08 5 23 11 11 05/28/08 - 07/02/08 6 19 11 7 07/02/08 - 07/30/08 10 19 14 +/- 6 07/30/08 - 09/03/08 10 26 17 +/- 11 09/03/08 - 10/01/08 11 34 21 +/- 17 (00 10/01/08 - 10/29/08 11 22 16 +/- 7 10/29/08 - 12/30/08 9 33 21 14 1/2/2008 - 12/30/08 <5 36 18 14

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

TABLE C-V.1 QUARTERLY TLD RESULTS FOR ZION NUCLEAR POWER STATION, 2008 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 20.3 + 6.8 25 19 20 17 Z-01-2 19.8 +/- 7.2 25 18, 19 17 7-02-1 18.5 + 8.7 25 16 17 16 Z-02-2 18.0 +/- 6.7 23 16 17 16 Z-03-1 19.0 + 7.1 24 16 19 17 Z-03-2 19.3 +/- 6.8 24 16 18 19 Z-101-1 19.8 +/- 7.2 25 17 19 18 Z-101-2 19.3 +/- 6.6 24 17 19 17 Z-102-1 21.3 +/- 9.0 28 19 19 19 Z-102-2 21.8 +/- 9.7 29 19 20 19 Z-103-1 19.5 +/- 7.4 25 17 18 18 Z-103-2 20.0 +/- 8.0 26 18 18 18 Z-104-1 20.5 +/- 8.7 27 18 18 19 Z-104-2 19.0 + 8.0 25 17 17 17 Z-105-1 20.8 +/- 8.7 27 20 19 17 Z-105-2 20.0 +/- 8.0 26 18 18 18 Z-106-1 19.5 +/- 7.4 24 16 17 21 Z-106-2 19.8 +/- 9.7 27 17 18 17 Z-107-1 19.8 +/- 6.2 24 18 20 17 Z-107-2 19.8 +/- 6.0 24 17 19 19 Z-108-1 20.3 +/- 9.1 27 17 19 18 Z-108-2 20.0 +/- 9.4 27 17 18 18 Z-110-1 20.0 +/- 9.4 27 17 18 18 Z-110-2 19.5 +/- 10 27 17 17 17 Z-111-1 19.8 +/- 11 28 17 18 16 Z-111-2 19.5 +/- 8.7 26 17 18 17 Z-112-1 21.3 +/- 6.6 26 21 19 19 Z-112-2 21.0 +/- 6.7 26 19 20 19 Z-113-1 20.5 +/- 6.8 25 17 19 21 Z-113-2 19.3 +/- 7.7 25 17 18 17 Z-114-1 23.3 +/- 7.0 27 19 25 22 Z-114-2 21.0 +/- 5.7 25 19 21 19 Z-115-1 20.5 +/- 8.7 27 19 18 18 Z-115-2 20.0 +/- 8.0 26 18 18 18 Z-301-1 24.0 + 11 27 30 20 19 Z-301-2 24.5 +/- 9.3 28 29 21 20 C-9

TABLE C-V.2 MEAN QUARTERLY TLD RESULTS FOR INNER RING AND OTHER LOCATIONS FOR ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OTHER PERIOD +/- 2 S.D.

JAN-MAR 26.2 +/- 2.7 24.3 +/- 1.6 APR-JUN 18.6 +/- 6.3 16.8 +/- 2.7 JUL-SEP 18.9 +/- 3.1 18.3 +/- 2.4 OCT-DEC 18.3 +/- 2.7 17.0 + 2.2 TABLE C-V.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 120 16 30 20.5 +/- 7.7 OTHER 24 16 25 19.1 +/- 6.6 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-1O

FIGURE C-1 PUBLIC WATER - GROSS BETA - STATIONS Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000-2004 Z-14 Kenosha Water Works

@aG 4,0 2.0 0 ,0 4- 1............... ....

.. - --l..---+ I ---- % 1 0" 11410 12-214,1 fzallull 1 1241-M 12-W-04 Z-1 5 Lake County Water Works

-I OF01~00 1241-00 12-3FI~2 lZM-03 12-31)1-1)4 C-lI

FIGURE C-1 (cont.)

PUBLIC WATER - GROSS BETA - STATIONS Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-14 (C) Kenosha Water Works 5.0 4.0 3.0 2.0 1.0 0.0 4-1/1/2005 10/20/2005 8/8/2006 5/27/2007 3/14/2008 12/31/2008 Z-1 5 Lake County Water Works 7.0 T 6.0 -

5.0 4 4.0 hAM

-J C.)

3.0 +

2.0 +

1.0 -

0.0 -

1/1/2005 10/20/2005 8/8/2006 5/27/2007 3/14/2008 12/31/2008 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-12

FIGURE C=2 PUBLIC WATER - GROSS BETA - STATIONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-46 Waulegan Water Works 110.0 .

010

,to 12-31-02 TZ31-03 12-304MI Z-18 Lake Forest Water Works, T

4

( ,I I 4 -- -us-0t*t.oo 12*31-00 12411.-01 12.~3-1-2 112-30-04 C-13

FIGURE C-2 (cont.)

PUBLIC WATER - GROSS BETA -STATIONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-16 Waukegan Water Works 10.0 9.0 8.0 -

7.0 A 6.0

\fA~.

-J 5.0 03.

4.0 3.0 2.0 1.0 0.0 -

01-01-05 10-20-05 08-08-06 05-27-07 03-14-08 12-31-08 Z-18 (C) Lake Forest Water Works 10.0 -

9.0 +

8.0 7.0 6.0

-J 5.0 C.)

4.0 3.0 \~

2.0 1.0 nfl I I I I 01-01-05 10-20-05 08-08-06 05-27-07 03-14-08 12-31-08 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-1 4 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-14 (C) Kenosha Water Works 3DO1 0-

-20D~ I-01 41-MOQ i24s-o 12-31-01 1241-02% 1,241-M~ 12404 Z-15 Lake County Water Works, 4001 300 -

100 0

-100 ~-L Q14i4O-0 12.I'M -a 12-73IJ101 12-30-M 12-31-M '12-20-04, C-15

FIGURE C=3 (cont.)

PUBLIC WATER TRITIUM - STATION Z-14 AND Z=15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-14 (C) Kenosha Water Works 300 -

200 C,

0,.

100 +

0 - I I I I 03-31-05 12-30-05 09-30-06 07-01-07 03-31-08 12-30-08 Z-15 Lake County Water Works 300 -r 250 +

200 C.

150 +

100 +

50 +

04 3/31/2005 12/30/2005 9/30/2006 7/1/2007 3/31/2008 12/30/2008 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-1 6 Waukegan Water Works Soo 400 30D 200 100 0

M-0100 1W3.0*

121-11-0 1", 42 1-alw,3 z40oI~

Z-18 (C) Lake Forest, Water Works 4001 2001 20O

-100~

-'2004 - - -__l C-17

FIGURE C-4 (cont.)

PUBLIC WATER - TRITIUM - STATION Z-16 AND Z-1 8 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-16 Waukegan Water Works 250 -r 200 <

150 +

,-J 0.

100 +

50 +

0 -

3/31/2005 12/30/2005 9/30/2006 7/1/2007 3/31/2008 12/30/2008 Z-18 (C) Lake Forest Water Works 250 T 200 150 +

-J 0.

100 +

50 +

04 1 3/31/2005 12/30/2005 9/30/2006 7/1/2007 3/31/2008 12/30/2008 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-18

FIGURE C-5 AIR PARTICULATES - GROSS BETA - STATIONS Z-O1 AND Z-02 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-01 Onsite No. 1', Southside 1;0,o a;0 4,0 D1-C1-4~O t2~3fisOD 12-31~01 12.1 -03 124&134 Z,42 Onsite N~o!, 2, Westside i &0 1,

il'-11-0 12,31-41 1241102 1243143 12-3044 C-19

FIGURE C-5 (cont.)

AIR PARTICULATES - GROSS BETA - STATIONS Z-01 AND Z-02 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-01 Onsite No. 1, Southside 50.0 40.0

-~30.0 C.

9 20.0 w

10.0 0.0 I I I I I I 1/5/2005 10/23/2005 8/10/2006 5/28/2007 3/14/2008 12/30/2008 Z-02 Onsite No. 2, Westside 50.0 40.0 E

30.0 C--

m.

0D 20.0 10.0 0.0 1 01-05-05 10-23-05 08-10-06 05-28-07 03-14-08 12-30-08 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-20

FIGURE C-6 AIR PARTICULATES - GROSS BETA - STATIONS Z=03 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-03 Onsi~t No. 3, Northside C9

$2.31["O) 11241-01 Qtj14~3 1~4D44 C-21

FIGURE C-6 (cont.)

AIR PARTICULATES - GROSS BETA - STATIONS Z-03 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2008 Z-03 Onsite No. 3, Northside 50.0 40.0 E

30.0 c.)

, 20.0 10.0 0.0 -

01-05-05 10-23-05 08-10-06 05-28-07 03-14-08 12-30-08 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-22

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

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

March 2008 E5847-396 Milk Sr-89 pCi/L 83.5 95.8 0.87 Sr-90 pCi/L 13.9 12.9 1.08 E5848-396 Milk 1-131 pCi/L 57.3 60.0 0.96 Ce-141 pCi/L 229 249 0.92 Cr-51 pCi/L 336 359 0.94 Cs-134 pCi/L 106 125 0.85 Cs-137 pCi/L 141 146 0.97 Co-58 pCi/L 71.8 70.8 1.01 Mn-54 pCi/L 98.1 94.2 1.04 Fe-59 pCi/L 102 102 1.00 Zn-65 pCi/L 135 137 0.99 Co-60 pCi/L 230 236 0.97 E5850A-396 AP Ce-141 pCi 163 157 1.04 Cr-51 pCi 233 227 1.03 Cs-134 pCi 72.6 79.0 0.92 Cs-137 pCi 98.3 92.0 1.07 Co-58 pCi 46.7 44.7 1.04 Mn-54 pCi 69.8 59.4 1.18 Fe-59 pCi 72.2 64.5 1.12 Zn-65 pCi 106 86.4 1.23 Co-60 pCi 156 149 1.05 E5849-396 Charcoal 1-131 pCi 65.5 60.1 1.09 A June 2008 E5971-396 Milk Sr-89 pCi/L 83.9 85.0 0.99 Sr-90 pCi/L 14.4 15.8 0.91 E5972-396 Milk 1-131 pCi/L 70.9 71.4 0.99 Ce-141 pCi/L 157 174 0.90 Cr-51 pCi/L 159 138 1.15 Cs-1 34 pCi/L 69.7 76.7 0.91 Cs- 137 pCi/L 115 116 0.99 Co-58 pCi/L 59.1 61.9 0.95 Mn-54 pCi/L 139 135 1.03 Fe-59 pCi/L 98.4 91.7 1.07 Zn-65 pCi/L 129 127 1.02 Co-60 pCi/L 101 104 0.97 E5974-396 AP Ce-141 pCi 206 207 1.00 Cr-51 pCi 173 164 1.05 Cs-134 pci 95.9 91.0 1.05 Cs-137 pCi 142.0 138.0 1.03 Co-58 pCi 72.0 73.4 0.98 Mn-54 pCi 180 160.0 1.13 Fe-59 pCi 108.0 109.0 0.99 Zn-65 pCi 159 150 1.06 Co-60 pCi 129 124 1.04 D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

June 2008 E5973-396 Charcoal 1-131 pCi 73.8 84.1 0.88 A September 2008 E6284-396 Milk Sr-89 pCi/L 76.2 73.9 1.03 A Sr-90 pCi/L 12.3 11.0 1.12 A E6285-396 Milk 1-131 pCi/L 65.7 67.9 0.97 A Ce-141 pCi/L 145 161 0.90 A Cr-51 pCi/L 406 421 0.96 A Cs-1 34 pCi/L 196 232 0.84 A Cs-137 pCi/L 147 162 0.91 A Co-58 pCi/L 167 179 0.93 A Mn-54 pCi/L 165 166 0.99 A Fe-59 pCi/L 161 144 1.12 A Zn-65 pCi/L 305 319 0.96 A Co-60 pCi/L 218 234 0.93 A E6287-396 AP Ce-141 pCi 79.5 76.3 1.04 A Cr-51 pCi 208 199 1.05 A Cs- 134 pCi 106 110 0.96 A Cs-137 pCi 79.3 76.7 1.03 A Co-58 pCi 87.7 84.4 1.04 A Mn-54 pCi 90.3 78.6 1.15 A Fe-59 pCi 81.7 68.3 1.20 A Zn-65 pCi 144 151 0.95 A Co-60 pCi 111 111 1.00 A E6286-396 Charcoal 1-131 pCi 93.2 90.0 1.04 A December 2008 E6415-396 Milk Sr-89 pCi/L 98.4 91.9 1.07 A Sr-90 pCi/L 18.0 12.6 1.43 N (1)

E6416-396 Milk 1-131 pCi/L 69.2 79.9 0.87 A Ce-141 pCi/L 177 191 0.93 A Cr-51 pCi/L 231 246 0.94 A Cs-1 34 pCi/L 117 134 0.87 A Cs-137 pCi/L 119 120 0.99 A Co-58 pCi/L 104 104 1.00 A Mn-54 pCi/L 153 152 1.01 A Fe-59 pCi/L 99.6 100 1.00 A Zn-65 pCi/L 177 183 0.97 A Co-60 pCi/L 133 133 1.00 A E6418-396 AP Ce-141 pCi 148 146 1.01 A Cr-51 pCi 202 187 1.08 A Cs-134 pCi 103 102 1.01 A Cs-137 pCi 95.4 91.2 1.05 A Co-58 pCi 81.4 79.2 1.03 A Mn-54 pCi 113 116.0 0.97 A Fe-59 pCi 76.5 76.4 1.00 A Zn-65 pCi 122 139 0.88 A Co-60 pCi 108 101 1.07 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2008 E6417-396 Charcoal 1-131 pCi 65.8 74.1 0.89 A (1) NCR 09-02 initiated to investigate the failure.

(a) Teledyne Brown Engineeringreported result.

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

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

(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable. Reported result falls within ratio limits of 0.80-1.20.

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

D-3

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2008 (PAGE 1 OF 1)

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

January 2008 Quiktm Response Water Sr-89 pCi/L 37.33 19.0 11.8-25.2 N (1)

Sr-90 pCi/L 40.40 42.7 31.5-49.0 A Ba-1 33 pCi/L 87.8 90.5 76.2 - 99.6 A Cs-134 pCi/L 80.67 88.9 72.9 - 97.8 A Cs-137 pCi/L 222.33 231 208-256 A Co-60 pCi/L 98.9 101.0 90.9 - 113 A Zn-65 pCi/L 352 350 315-408 A Gr-A pCi/L 13.0 12.7 6.02 - 18.7 A Gr-B pCi/L 32.7 36.2 23.8 -43.8 A H-3 pCi/L 11100 11300 9840- 12400 A January 2008 RAD 72 Water Sr-89 pCi/L 69.0 65.3 53.0 - 73.4 A Sr-90 pCi/L 35.6 41.4 30.5 -47.6 A Ba-133 pCi/L 25.9 25.7 20.0 - 29.5 A Cs-134 pCi/L 86.5 92.6 76.0- 102 A Cs-137 pCi/L 155 158 142- 176 A Co-60 pCi/L 16.0 14.4 11.4- 18.7 A Zn-65 pCi/L 214 204 184-240 A Gr-A pCi/L 13.3 14.8 7.15-21.2 A Gr-B pCi/L 21.2 22.5 13.7-30.6 A 1-131 pCi/L .22.8 23.6 19.6-28.0 A H-3 pCi/L 3390 3540 3000-3910 A April 2008 Rad 73 Water Sr-89 pCi/L 65.47 60.4 48.6 - 68.2 A Sr-90 pCi/L 39.80 39.2 28.8 -45.1 A Ba-1 33 pCi/L 59.63 58.3 48.3 - 64.3 A Cs-1 34 pCi/L 45.00 46.6 37.4 - 51.3 A Cs-137 pCi/L 97.97 102 91.8-115 A Co-60 pCi/L 75.47 76.6 68.9 - 86.7 A Zn-65 pCi/L 109 106 95.4- 126 A Gr-A pCi/L 41.03 50.8 26.5 -63.7 A Gr-B pCi/L 50.20 51.4 35.0 - 58.4 A 1-131 pCi/L 26.67 28.7 23.9 - 33.6 A H-3 pCi/L 11633 12000 10400 - 13200 A (1) Could find no cause for Sr-89 failure. Sample sent to outside lab for verification, but the outside laboratorywas unable to confirm our numbers or ERA numbers. Studies bracketingthese results, RAD 71 and RAD 72, had acceptable Sr-89 results. NCR 08-03 (a) Teledyne Brown Engineering reportedresult.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determined by gravimetric and/or volumetric measurements made 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, 2008 (PAGE 1 OF 2)

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

January 2008 07-MaW18 Water Cs-134 Bq/L -0.26 (1) A Cs-137 Bq/L 0.029 (1) A Co-57 Bq/L 21 22.8 16,0 - 29.6 A Co-60 Bq/L 8.2 8.40 5.88- 10.92 A H-3 Bq/L 473 472 330-614 A Mn-54 Bq/L 12 12.1 8.5- 15.7 A Sr-90 Bq/L 10.70 11.4 7.98- 14.82 A Zn-65 Bq/L 15.6 16.3 11.4- 21.2 A 07-GrW18 Water Gr-A Bq/L 1.4 1.399 >0.0 - 2.798 A Gr-B Bq/L 3.06 2.43 1.22 - 3.65 A 07-MaS18 Soil Cs-134 Bq/kg 790 854.0 598-1110 A Cs-137 Bq/kg 568 545 382 - 709 A Co-57 Bq/kg 424 421 295 - 547 A Co-60 Bq/kg 2.307 2.9 (2) A Mn-54 Bq/kg 611 570 399-741 A K-40 Bqfkg 6.09 571 400 - 742 A Sr-90 Bq/kg 454 493.0 345-641 A Zn-65 Bq/kg 0.162 (1) A 07-RdF18 AP Cs-134 Bq/sample 2.73 2.5200 1.76 - 3.28 A Cs-137 Bq/sample 2.88 2.7 1.89- 3.51 A Co-57 Bq/sample 3.493 3.55 2.49-4.62 A Co-60 Bq/sample 1.357 1.31 0.92- 1.70 A Mn-54 Bq/sample 0.006 (1) A Sr-90 Bq/sample 1.61 1.548 1.084 - 2.012 A Zn-65 Bq/sample 2.59 2.04 1.43 -2.65 A 07-GrF18 AP Gr-A Bq/sample 0.131 0.348 >0.0 - 0.696 A Gr-B Bq/sample 0.261 0.286 0.143 - 0.429 A January 2008 07-RdV18 Vegetation Cs-134 Bq/sample 5.25 6.28 4,40-8.16 A Cs-137 Bq/sampte 3,13 3.41 2,39 - 4.43, A Co-57 Bq/sample 6.837 6.89 4.82 - 8.96 A Co-60 Bq/sample 2.44 2.77 1.94-3.60 A Mn-54 Bq/sample 4.45 4.74 3132 - 6.16 A K-40 Bq/sample 61.3 (1)

Sr-90 Bq/sample 1.33 1.273 0.891 - 1.655 A Zn-65 Bq/sample 0.085 (1) A August 2008 08-MaW19 Water Cs- 134 Bq/L 17.1 19.5 13.7-25.4 A Cs-1 37 Bq/L 21.4 23.6 16.5 - 30.7 A Co-57 Bq/L -0.044 (1) A Co-60 Bq/L 10.8 11.6 8.1 - 15.1 A H-3 Bq/L 334 341 239 - 443 A Mn-54 Bq/L 13.0 13.7 9.6- 17.8 A Sr-90 Bq/L 6.55 6.45 4.52- 8.39 A Zn-65 Bq/L 16.5 17.1 12.0 - 2212 A D-5

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

TELEDYNE BROWN ENGINEERING, 2008 (PAGE 2 OF 2)

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

August 2008 08-GrW19 Water Gr-A Bq/L 0.0612 <0.56 (3) A Gr-B Bq/L 0.222 <1.85 (3) A 08-MaS19 Soil Cs-134 Bq/kg 546 581 407 - 755 A Cs-137 Bq/kg 2.52 2.8 (2) A Co-57 Bq/kg 340 333 233 - 433 A Co-60 Bq/kg 157 145.0 102- 189 A Mn-54 Bq/kg 460 415 291 - 540 A K-40 Bq/kg 650 571 399-741 A Sr-90 Bq/kg 1.40 (1) A Zn-65 Bq/kg -1.53 (1) A 08-RdF19 AP Cs-134 Bq/sample 2.46 2.6300 1.84 - 3.42 A Cs-137 Bq/sample 0.0063 (1) A Co-57 Bq/sample 1.36 1.50 1.05 - 1.95 A (1)

Co-60 Bq/sample 0.0143 A Mn-54 Bq/sample 2.70 2.64 1.85-3.43 A Sr-90 Bq/sample 1.42 1.12 0.78-1.46 W Zn-65 Bq/sample 0.975 0.94 0.66 - 1.22 A 08-GrF19 AP Gr-A Bq/sample -0.0037 (4) A Gr-B Bq/sample 0.540 0.525 0.263 - 0.788 A 08-RdV19 Vegetation Cs-134 Bq/sample 4.36 5.5 3.9 - 7.2 W Cs-137 Bq/sample -0.03 (1) A Co-57 Bq/sample 6.72 7.1 5.0-9.2 A Co-60 Bq/sample 4.04 4.70 3.3 - 6.1 A Mn-54 Bq/sample 5.22 5.8 4.1 -7.5 A K-40 Bq/sample 64.4 (1)

Sr-90 Bq/sample 1.62 1.9 1.3-2.5 A Zn-65 Bq/sample 6.160 6.9 4.8 - 9.0 A (1) Not evaluatedby MAPEP.

(2) Reported a statisticallyzero result.

(3) Designed to test the Safe Drinking Water screeninglevels. Labs reporting values less than ref values were found to be acceptable.

(4) Falsepositive test.

(a) Teledyne Brown Engineeringreported result.

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

(c) DOE/MAPEPevaluation: A=acceptable, W=acceptable with warning,N=not acceptable.

D-6

TABLE D-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2008 (Page 1 of 1)

Concentration (pCi/L)

Lab Code ) Date Analysis Laboratory ERA Control Result c Result d Limits Acceptance STAP-1 143 03/24/08 Co-60 650.72 +/- 3.00 730.0 565.0 - 912.0 Pass STAP-i 143 03/24/08 Cs-134 467.50 +/- 5.53 523.0 341.0 -647.0 Pass STAP-1 143 03/24/08 Cs-137 1375.90 +/- 25.41 1450.0 1090.0 - 1900.0 Pass STAP-1 143 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 - 10.0 Pass STAP-1 143 03/24/08 Sr-90 157.60 +/- 7.70 152.0 66.9 - 236.0 Pass STAP-1 143 03/24/08 Zn-65 889.90 +/- 15.90 872.0 '604.0 - 1210.0 Pass STAP-i 144 03/24/08 Gr. Beta 99.90 +/- 3.09 92.2 56.80 - 135.0 Pass STSO-1 145 03/24/08 Ac-228 1269.02 +/- 36.81 1180.0 757.0 - 1660.0 Pass STSO-1145 03/24/08 Bi-212 1407.10 +/- 56.64 1360.0 357.0 -2030.0 Pass STSO-1 145 03/24/08 Co-60 5219.70 +/- 90.30 5130.0 3730.0 -6890.0 Pass STSO-1145 03/24/08 Cs-134 5427.30 +/- 102.94 5640.0 3630.0 -6790.0 Pass STSO-1145 03/24/08 Cs-137 6346.60 +/- 201.80 6010.0 4600.0 - 7810.0 Pass STSO-1145 03/24/08 K-40 11052.70 +/- 181.80 11000.0 7980.0 - 14900.0 Pass STSO-1 145 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 -10.0 Pass STSO-1145 03/24/08 Pb-212 1198.20 +/- 96.58 1080.0 697.0 -1520.0 Pass STSO-1145 03/24/08 Pb-214 2253.30 +/- 291.60 2020.0 1210.0 -3010.0 Pass STSO-1 145 03/24/08 Sr-90 6407.00 +/- 277.00 5360.0 1940.0 -8750.0 Pass STSO-1145 03/24/08 Th-234 2421.80 +/- 321.00 2030.0 644.0 - 3870.0 Pass STSO-1 145 03/24/08 Zn-65 2936.20 +/- 73.50 2660.0 2110.0 -3570.0 Pass STVE-1 146 03/24/08 Co-60 912.41 +/- 13.59 888.0 600.0 - 1280.0 Pass STVE-1 146 03/24/08 Cs-134 1547.70 +/- 38.81 1540.0 882.0 -2130.0 Pass STVE-1 146 03/24/08 Cs-137 1163.80 +/- 20.62 1100.0 807.0 -1530.0 Pass STVE-1 146 03/24/08 K-40 22186.00 +/- 339.40 24600.0 17700.0 - 34800.0 Pass STVE-1146 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 -10.0 Pass STVE-1 146 03/24/08 Sr-90 3825.90 +/- 140.66 4130.0 2310.0 - 5480.0 Pass STVE-1 146 03/24/08 Zn-65 1676.80 +/- 43.00 1430.0 1030.0 - 1960.0 Pass STW-1 147 03/24/08 Co-60 1430.00 +/- 33.33 1420.0 1240.0 -1680.0 Pass STW-1 147 03/24/08 Cs-134 730.18 +/- 33.39 751.0 555.0 -862.0 Pass STW-1 147 03/24/08 Cs-137 1947.80 +/- 13.80 1990.0 1690.0 -2380.0 Pass STW-1 147 e 03/24/08 Mn-54 0.00 +/- 0.00 0.0 0.0 -10.0 Pass STW-1 147 03/24/08 Sr-90 512.03 +/- 43.37 512.0 325.0 -684.0 Pass STW-1 147 03/24/08 Zn-65 708.90 +/- 29.00 694.0 588.0 -865.0 Pass STW-1120 03/19/07 Zn-65 2009.00 +/- 36.40 1910.0 1600.0 -2410.0 Pass Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

b Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

' Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

d Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.

e Included in the testing series as a "false positive". No activity expected.

D-7

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2008 (Page 1 of 2)

Concentration '"

Known Control Lab Code' Date Analysis Laboratory result Activity Limits d Acceptance STW-1 137 01/01/08 Co-57 23.80 +/- 0.60 22.80 16.00 - 29.60 Pass STW-1 137 01/01/08 Co-60 8.60 +/- 0.50 8.40 5.88 - 10.92 Pass STW-1 137 01/01/08 Cs-134 -0.021 +/- 0.10 0.00 -1.00 - 1.00 Pass STW-1137 01/01/08 Cs-1 37 0.00 +/- 0.10 0.00 -1.00 - 1.00 Pass STW-1 137 01/01/08 H-3 515.10 +/- 12.70 472.00 330.00 - 614.00 Pass STW-1137 01/01/08 Mn-54 12.90 +/- 0.80 12.10 8.50 - 15.70 Pass STW-1137 01/01/08 Sr-90 12.00 +/- 1.50 11.40 7.98 - 14.82 Pass STW-1137 01/01/08 Zn-65 16.90 +/- 1.40 16.30 11.40 - 21.20 Pass STW-1138 01/01/08 Gr. Beta 2.30 +/- 0.15 2.43 1.22 -3.65 Pass STAP-1 139 01/01/08 Co-57 3.90 +/- 0.07 3.55 2.49 -4.62 Pass STAP-1 139 01/01/08 Co-60 1.43 +/- 0.07 1.31 0.92-1.70 Pass STAP-1 139 01/01/08 Cs-134 2.59 +/- 0.16 2.52 1.76 -3.28 Pass STAP-1 139 01/01/08 Cs-137 3.05 +/- 0.12 2.70 1.89 -3.51 Pass STAP-1 139 01/01/08 Mn-54 0.43 +/- 0.58 0.00 0.00 -1.00 Pass STAP-1 139 01/01/08 Sr-90 1.30 +/- 0.27 1.55 1.08-2.01 Pass STAP-1 139 01/01/08 Zn-65 2.36 +/- 0.18 2.04 1.43 -2.65 Pass STAP-1140 01/01/08 Gr. Beta 0.34 +/- 0.04 0.29 0.14 -0.43 Pass STVE-1 141 01/01/08 Co-57 8.30 +/- 0.18 6.89 4.82 -8.96 Pass STVE-1 141 01/01/08 Co-60 3.03 +/- 0.13 2.77 1.94 -3.60 Pass STVE-1 141 01/01/08 Cs-134 6.53 +/- 0.29 6.28 4.40-8.16 Pass STVE-1 141 01/01/08 Cs-137 3.90 +/- 0.19 3.41 2.39 -4.43 Pass STVE-1 141 01/01/08 Mn-54 5.43 +/- 0.21 4.74 3.32 -6.16 Pass STVE-1 141 01/01/08 Zn-65 0.033 +/- 0.10 0.00 0.00 -1.00 Pass STSO-1 142 01/01/08 Co-57 483.00 +/- 3.00 421.00 295.00 -547.00 Pass STSO-1 142 01/01/08 Co-60 3.00 +/- 0.80 2.90 0.00 -5.00 Pass STSO-1 142 01/01/08 Cs-1 34 896.50 +/- 7.40 854.00 598.00 -1110.00 Pass STSO-1 142 01/01/08 Cs-137 624.40 +/- 4.10 545.00 382.00 -709.00 Pass STSO-1 142 01/01/08 Mn-54 667.20 +/- 3.80 570.00 399.00 -741.00 Pass STSO-1 142 01/01/08 Zn-65 0.093 +/- 0.91 0.00 0.00 -1.00 Pass STSO-1 158 08/01/08 Co-57 353.02 +/- 2.01 333.00 233.00 - 433.00 Pass STSO-1 158 08/01/08 Co-60 151.99 +/- 1.58 145.00 102.00 -189.00 Pass STSO-1 158 08/01/08 Cs-134 499.72 +/- 2.65 581.00 407.00 - 755.00 Pass STSO-1 158 08/01/08 Cs-137 2.54 +/- 0.25 2.80 0.00 -5.00 Pass STSO-1 158 08/01/08 K-40 643.94 +/- 15.50 570.00 399.00 -741.00 Pass STSO-1 158 08/01/08 Mn-54 452.14 +/- 2.96 415.00 291.00 - 540.00 Pass STSO-1 158 08/01/08 Sr-90 1.95 +/- 2.04 0.00 0.00 -5.00 Pass STSO-1 158 08/01/08 Zn-65 0.10 +/- 2.04 0.00 0.00 -5.00 Pass D-8

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2008 (Page 2 of 2)

Concentration '

Known Control Lab Codec Date Analysis Laboratory r esult Activity Limits d Acceptance STVE-1 159 08/01/08 Co-57 8.52 +/- 0. 23 7.10 5.00 - 9.20 Pass STVE-1 159 08/01/08 Co-60 5.08 +/- 0. 19 4.70 3.30 -6.10 Pass STVE-1 159 08/01/08 Cs-134 5.26 +/- 0. 18 5.50 3.90 - 7.20 Pass STVE-1 159 08/01/08 Cs-1 37 0.01 +/- 0. 14 0.00 0.00 - 1.00 Pass STVE-1 159 08/01/08 Mn-54 6.39 +/- 0. 28 5.80 4.10 -7.50 Pass STVE-1 159 08/01/08 Zn-65 7.73 +/- 0. 45 6.90 4.80 - 9.00 Pass STW-1162 08/01/08 Co-57 0.03 +/- 0.16 0.00 0.00 - 5.00 Pass STW-1162 08/01/08 Co-60 11.27 +/- 0.23 11.60 8.10 - 15.10 Pass STW-1 162 08/01/08 Cs-134 17.93 +/- 0.52 19.50 13.70 - 25.40 Pass STW-1 162 08/01/08 Cs-137 23.72 +/- 0.43 23.60 16.50 - 30.70 Pass STW-1162 08/01/08 H-3 385.15 +/- 8.93 341.00 239.00 - 443.00 Pass STW-1 162 08/01/08 Mn-54 13.87 +/- 0.37 13.70 9.60 - 17.80 Pass STW-1162 08/01/08 Sr-90 6.49 +/- 1.12 6.45 4.52 - 8.39 Pass STW-1 162 08/01/08 Zn-65 17.64 +/- 0.61 17.10 12.00 - 22.20 Pass STW-1 163 08/01/08 Gr. Beta 0.12 +/- 0.05 0.00 0.00 - 1.85 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho b Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

c Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

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

D-9

Intentionally left blank APPENDIX E EFFLUENT DATA

TABLE OF CONTENTS INTRO DUCTIO N.................................................................................................................... 1 SUM M ARY ............................................................................................................................. 2 1.0. EFFLUENTS .................................................................................................. 3 1.1. G aseous Effluents to the Atm osphere ... ............................................. 3 1.2. Liquids Released to Lake M ichigan ..................................................... 3 2.0. SO LID RADIOACTIVE W ASTE .................................................................... 3 3.0. DO SE TO MAN ................................................................................................ 3 3.1. Gaseous Effluent Pathways ................................................................ 3 3.1.1. G aseous Releases ................................................................ 4 3.1.1.1. G am m a 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 Effl uent Pathways .................................................................... 5 3.3. Assessm ent of Dose to Mem ber of Public .......................................... 6 4.0. SITE M ETEO RO LO GY .................................................................................. 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 ......................................... 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 2008 showed zero 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 O.OOE+00 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 10CFR50 Appendix 1, 10CFR20 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 O.OOE+00 pCi/sec during any one quarter period.

A total of 0.OOE+00 microcuries of beta-gamma emitters was released as airborne particulate matter with a maximum average quarterly release rate of O.OOE+00 pCi/sec. quarterly only.

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

1.2 Liquids Released to Lake Michigan A total of 3.8E+07 liters of liquid waste containing 0.OOE+00 microcuries was discharged from the station via an approved pathway after dilution with a total of 4.37E+10 liters of water. These wastes were released at a maximum quarterly average concentration of 0.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 2008.

2.0 SOLID RADIOACTIVE WASTE There was one solid radioactive waste shipment. For more detail, refer to Zion Station 2008 Effluent Report.

3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne radioactivity 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 O.OOE+00 mrem (adult) 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 maximum gamma air dose was O.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/cm 2 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 0.OOE+00 mrem based on measured effluents and concurrent meteorological data 4

(Table 3.4-1).

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+00 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 0.00E+00 mrem (adult) and no organ dose exceeded O.OOE+00 mrem (teenage liver) (Table 3.2-1).

5

3.3 Assessment of Dose to Member of Public During the period January to December, 2008, Zion Station did not exceed the below limits as shown in Table 3.1-1 and Table 3.2-1 (based on yearly average meteorological data), and Figure 3.1-1 (based on concurrent meteorological data):

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 mrem 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-133, 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 99.2% during 2008 (Table 3.4-1).

6

APPENDIX E-1 DATA TABLES AND FIGURES E- 1.1

E- 1.2 Table 2.0-1 Solid Radioactive Waste Table 2.0-1 has been deliberately deleted. For details on solid waste disposal, see the Zion 2008 Annual Effluent Report E- 1.3

Table 3.1-1 Maximum Doses Resulting from Airborne Releases RETDAS v3.6.3 <ZIO> VSSI 40CFRI90 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2008 Unit Range - From: 1 To: 2 I&P DOSE LIMIT ANALYSIS ---------- ANNUAL 2008 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2008 - Admin. Any Organ 0.OOE+00 1.OOE+01 0 OOE+00 2008 - Admin. Total Body 0.OOE+00 1.OOE+01 0 OOE+00 2008 - T.Spc. Any Organ 0.OOE+00 1.50E+01 0 OOE+00 Receptor: 0 Distance: (meters) Compass Point:

Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage 2008 - T.Spc. Total Body 0.OOE+00 1.50E+01 0 .OOE+00 Receptor: 0 Distance: (meters) Compass Point:,

Critical.Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage E - 1.4

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases RETDAS v3.6.3 <ZIO> VSSI 40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2008 Unit Range - From: 1 To: 2 NG DOSE LIMIT ANALYSIS ANNUAL 2008 Dose Limit Max % of Annual - Limit (mrad) (mrad) Limit 2008 - Admin. Gamma 0.OOE+00 5.OOE+00 0 00E+00 2008 - Admin. Beta 0.OOE+00 1.00E+01 0 .OOE+00 2008 - T.Spc. Gamma 0.OOE+00 1.OOE+01 0 .OOE+00 Receptor: 0 Distance: (meters) Compass Point:

Nuclide Percentage 2008 - T.Spc. Beta 0.OOE+00 2.OOE+01 0.OOE+00 Receptor: 0 Distance: (meters) Compass Point:

Nuclide Percentage E- 1.5

Table 3.2-1 Maximum Doses Resulting from Liquid Effluents RETDAS v3.6.3 <ZIO> VSSI 40CFR190 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Report for: 2008 Unit Range - From: 1 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) ANNUAL 2008 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB SITE DOSE LIMIT ANALYSIS 2008 -ANNUAL Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2008 - Admin. Any Organ 0.OOE+00 5.OOE+00 0. OOE+00 2008 - Admin. Total Body ADULT TBODY 0.OOE+00 2.25E+00 0. OOE+00 2008 - T.Spc. Any Organ 0.OOE+00 1.OOE+01 0.OOE+00 Critical Pathway:

Major Contributors (0% or greater to total)

Nuclide Percentage 2008 - 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 - 1.6

Table 3.3-1 10CFR20 Compliance Assessment ZION STATION 2008 Unit 1 I0CFR20 Compliance Assessment

1. 10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent 0.00E00 mrem/year 10 CFR 20.1301 (a) (1) limit 100 mrem/year

% of the limit 0.00000000

2. Compliance Summary 10CFR20 1 st Qtr. 2 nd Qtr. 3 rd Qtr. 4 th Qtr % of Limit TEDE 0 0 0 0 0.00000000 ZION STATION 2008 Unit 2 10CFR20 Compliance Assessment

1. 10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent 0.OOEOO mrem/year 10 CFR 20.1301 (a) (1) limit 100 mrem/year

% of the limit 0.00000000

2. Compliance Summary 10CFR20 ist Qtr. Qtr. 3 rd Qtr. 4 th Qtr 2 nd % of Limit TEDE 0 "0 0 0 0.00000000 E - 1.7

Table 3.4-1 Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zion Station - Unit 1 MAXIMUMDOSES RESULTING FRK4 AIRBORNE RELEASES 2008 TYRE OF DOSE FIRST QUARTER SECOND QUARTERTHIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 0,0001E4100( N )) N ) b.60QE+00( N ) N } OOOOGE+00( N)

} 0.DODE+00( N ) N)

BETA AIR (mrad) O.QOOIE+00( N ) 0. OOOE+OO( N O.DOOE+00( N ) 0.OOOE+OC(

) )

WHOLE BODY (mrem) N N N)

O0.OE+00( N ) ) 0,OOOE+00( N) O.OOOEtOD( )

SKIN (mrem) O.OOOE+00( O.ODOE+O0( N)

) H ) 0.0O0CE40(N) 0.000E+00( N )

ORA (Mrem) 0h.000E+00( N 0.U00E+00( N)

CRITICAL PERSON Adult Adult Adult Adul t Adult CRITICAL ORGAN Bone Bone Bone Bone Bone COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.'I TYPE OF DOSE QUARTERLY 'OBJECTIVE 2 OF APP. I YEARLY OBJECTIVE X OF APP. I GAMMA AIR (mrad) 5.0 O.00 10.O 0.00 10.0 20.0.

BETA AIR.(mred) 0.00 5.0' 0.00 WHOLE BODY (mrem) 2.5 15.0 0.00 SKIN (mrem) 745 7.5 0.00 15.0 ORGAN (mrem) 0.00 CRITICAL PERSON Adult Adult CRITICAL ORGAn Bone Bone Calculation used release data from the following:

Unit I - Ground 0

Date of calculation: 2/11/2069 E- 1.8

Table 3.4-1 (continued)

Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zion Station - Unit 2 MAXIKUM DOSES RESULTING FROM AIRBORNE RELEASES 20B TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMJNA AIR (Wrad) D0.DE4'0( rN) 0'0kD+06( N) 0. 000E+0 L( HN 0.DE+001 N Y BETA AIR (mrad) 0DOOOE+DO( N D.ODOE+OD( Nl) 0'.000E+00( IN 0.O0E+D0R N a, OOE+PUD( NK WHOLE BODY (mrep) 6M0OE+00( N 0ýO0DE+O0( N 0.ODOE.'00( N~

SKIN (mrem) 0.00DE+001( N 0.DIIOE+00( N QOOOE+00( N 0.000E.00( H )

0.6toQ+0 W I 01000E400( N ORGAN. (mrem) O..OOOE+00( N CRITICAL PERSON Adult Adult Adult Adult Adult CRITICAL ORGAN Bone Bone Bone Bone Bone COMPL IANCE STAM 10 CFR 50 APP. I 10 CFR 50 APPJI TYPE OF .OSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE VOF APP. I G9AMA AIR (mrad} 5.0 o on 10~O 0 1.0I0 BETA AIR (mrad) 10io 0.00 .20 0 0.00 wIIOE BODY (nirerm) 2.5 .5.0 SKIN (inren 7,5 0.00 15~0 ORGAN (mrem) 7,5. 0A00 15,0 CRITICAL PERSON Adult Adult CRITICAL ORGAN Bone Calculation used release data from the following:

Unit 2 - Ground Vate of calculation: 2/11/2009 E - 1.9

Intentionally left blank APPENDIX F METEOROLOGICAL DATA

Zion Nuclear Station Period of Record: January - March 2008 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 0 0 0 NNE 0 2 0 2 NE 0 1 0 1 ENE 0 0 0 0 E 0 1 0 1 ESE 0 0 0 0 SE 0 0 0 0 SSE 0 0 0 0 S 0 0 0 0 SSW 0 0 0 SW 0 0 WSW 0 2 3 .5 W 0 5 13 WNW 0 5 0 5 NW 0 0 0 NNW 0 0 0 0 Variable 0 0 0 0 Total 0 19 28 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2008 Stability Class - Moderately Unstable - 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 0 0 NNE 3 0 NE 2 0 ENE 1 0 E 2 0 ESE 2 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 sw 3 0 WSW 4 0, W, 5 0 2 0ý WNW 2 0 N14q 0 0 Variable 0 0 Total 26 0 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2008 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 2 0 0 2 NNE 0 1 5 3 0 0 9 NE 0 0 1 0 0 0 1 ENE 0 1 3 0 0 0 4 E 0 0 0 0 0 0 0 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 1 0 0. 0 1 S 0 1 1. 0 0 0 2 SSW 0 0 7 0 0 0 7 SW 0 1 4 0 0 0 5 WSW 0 1 4 4 0 0 9 W 0 3 15 3 0 0 21

.WNW. 0 3 3 0 0 0 6 NW 0 0 1 1 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 11 46 13 0 0 70 Hours of calm in this stabi.lity 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 2008 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 6 35 14 0 0 55 NNE 0 14 33 13 0 0 60 NE 1 6 11 10 1 0 29 ENE 0 5 8 4 12 0 29 E 0 5 17 16 7 0 45 ESE 0 22 24 2 0 0 48 SE 1 12 20 0 0 0 33 SSE 1 7 39 16 1 0 64 S 2 34 35 11 0 0 82 SSW 6 22 49 13 1 0 91 SW 6 25 17 11 5 0 64 WSW 8 38 40 16 0 0 102 W 6 42 96 32 6 0 182 WNW 5 35 80 13 3 0 136 NW 1 15 59 0 0 0 75 NNW 0 12 13 5 0 0 30 Variable 0 0 0 0 0 0 0 Total 37 300 576 176 36 0 1125 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 39 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2008 Stability Class - Slightly 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 5 8 27 6 46 NNE 6 11 21 8 46 NE 2 18 2 6 31 ENE 1 9 2 1 1.6 E 1 9 5 2 18 ESE 2 7 10 1 20 SE 2 13 16 0 31 SSE 1 14 14 10 41 S 5 36 19 8 68 SSW S 16 10 6 37 SW 11 37 7 4 59 WSW 12 23 7 2 44 8 30 23 12 74 WNW 13 46 17 1 71 NW 9 45 17 0 71 NNW 2 33 7 0 42 Variable 0 0 0 0 0 Total 85 355 198 9 1 715 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2008 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 3 0 0 0 3 NNE 0 1 0 0 1 NE 0 0 0 0 0 ENE 1 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 3 0 0 3 SSE 0 4 12 0 18 S 0 12 8 0 20 SSW 4 0 0 5 SW 6 2 0 0 8 WSW 0 6 0 .0 7 W 5 7 0 0 12 WNW 9 18 0 0 27 NW 4 3 0 0 7 NNW 1 3 0 0 4 Variable 0 5 0 0 0 0 0 Total 33 59 21 3 0 0 116 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 2008 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 Tot al N 0 0 0 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 4 15 S 1 5 6 Ssw 0 0 0 SW 0 0 0 WSW 4 0 4 W 7 0 7 WNW 4 0 4 NW 3 0 3 NNW 0 0 0 Variable 0 0 0 Total 23 16 0 39 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 2008 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 2 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 1 0 0 0 1 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 3 1 0 4 W 0 0 0 7 4 0 11 WNW 0 0 1 3 5 0 9 NW 0 0 0 2 0 0 2 NNW 0 0 0 0 0 0 0

.Variable 0 0 0 0 0 0 0 Total 0 0 5 15 10 0 30 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 2008 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 0 0 0 0 NNE 0 0 1 1 0 0 2 NE 0 0 3 0 0 0 3 ENE 0 0 1 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 0 3 0 0 0 3 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 3 4 1 0 8 W 0 0 1 2 3 0 6 WNW 0 0 4 0 4 0 8 NW 0 0 0 3 1 0 4 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 17 10 9 0 36 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 2008 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 2 2 NNE 3 2 2 7 NE 2 0 1 3 ENE 4 0 0 4 E 0 0 0 0 ESE 1 0 0 1 SE 0 0 0 0 SSE 0 0 0 0 S 1 2 0 3 SSW 0 2 0 2 SW 3 5 0 8 WSW 1 2 i 5 W 3 9 2 16 WNW 2 7 1 15 NW 0 1 2 NNW 0 1 2 Variable 0 0 0 0 Total 20 31 i1 4 70 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 2008 Stability Class - Neutral - 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 0 14 12 13 3 42 NNE 0 4 16 33 20 3 76 NE 0 8 7 6 9 4 34 ENE 0 2 3 7 3 6 21 E 0 2 7 5 11 15 40 ESE 1 3 12 15 14 2 47 SE 0 6 12 20 12 -1 51 SSE 1 5 16 26 2 1 51 S 0 2 12 22 i0 1 47 SSW 0 6 20 53 7 14 100 SW 1 7 18 19 17 13 75 WSW 2 10 42 26 10 5 95 19 33 55 3.7 1*1 155 W 0 WNW 0 13 26 65 31 24 159 NW 0 6 24 58 25 5 118 NNW 0 8 10 26 3 0 47 Variable 0 0 0 0 0 0 0 Total 5 101 272 448 224 108 1158 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 2008 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 4 8 20 0 32 NNE 0 8 9 15 26 66 NE 0 7 14 5 1 36 ENE 1 5 9 4 0 22 1 3 9 1 1 20 E

ESE 0 0 5 10 4 20 SE 0 5 5 16 5 32 SSE 0 6 3 13 9 34 S

2 5 6 14 3 32 SSW 1 6 18 25 10 67 SW 1 5 29 11 5 53 sw WSW 0 9 27 14 1 51 0 0 14 22 16 59 WNW 1 6 15 24 7 56 NW 0~ 6 25 47 4 82 NNW 1 4 28 23 0 56 Variable 0 0 0 0 0 0 Total 8 79 224 264 92 51 718 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: January - March 2008 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 2 0 0 2 NNE 2 2 1 0 5 NE 1 1 0 0 2 ENE 0 0 0 0 0 E 0 1 0 .0 1 ESE 0 0 0 0 0 SE 1 0 0 1 SSE 1 1 0 2 4 S 0 1 10 11 25 SSW 0 1 6 12 SW 2 1 2 0 5 WSW 0 8 3 0 11 W 0 3 2 1 6 WNW 3 4 6 0 13 NW 0 4 10 1 15 NNW 0 9 5 0 14 Variable 0 0 0 0 0 Total 10 38 45 18 4 116 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 2008 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 3 0 0 0 3 NNE 0 0 1 0 0 0 1 NE 0 0 0 0 0 0 0 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 1 0 1 S 0 0 0 3 9 3 15 SSW 0 0 2 1 2 0 5 SW 0 0 0 0. 0 0 0 WSW 0 0 0 1 0 0 1 W 0 0 1 4 0 0 5 WNW 0 0 0 3 0 0 3 NW 0 0 2 1 0 0 3 NNW 0 0 2 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 \ 0 11 13 12 3 39 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: April - June 2008 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 0 0 0 0 0 0 NNE 0 0 0 1 0 0 1 NE 0 3 3 0 0 0 6 ENE 0 0 3 0 0 0 3 E 0 3 2 0 0 0 5 ESE 0 1 2 0 0 0 3 SE 0 0 2 0 0 0 2 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 2 0 0 2 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 7 12 3 0 0 22 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 0 0 1 0 1 NNE 0 0 4 1 0 0 5 NE 0 2 3 0 0 0 5 ENE 0 1 1 0 0 0 2 E 0 2 0 0 0 0 2 ESE 0 0 1 0 0 0 1 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 1 0 1 WSW, 0 0 0 2 2 0 4 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 5 9 3 4 0 21 Hours of calm in this stability class: 0 Hours of missing wind measurcements in this stability class: 0 Hours of missing stability measurements in all stability-:classes: 217

Zion Nuclear Station Period of Record: April - June 2008 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 Tot al N 0 0 0 5 1 0 6 NNE 0. 0 4 3 0 0 7 NE 0 5 3 0 0 0 8 ENE 0 2 3 0 0 0 5 E 0 1 2 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 2 2 0 0 0 4 SSE 0 0 2 0 0 0 2 S 0 0 0 0 0 0 0 SSW 0. 0 0 5 0 0 5 SW 0 1 2 1 1 5 0

WSW 0 1 6 .2 2 1i 0

W 0 I 1 4 0 6 00 WNW 0 0 2 0 0 2 00 NW 0 0 1 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 Total 0 14 28 20 :4 0 66 Hours of calm in this stability class: 0 Hours of missing wind measuirements in this stability class: 0 Hours of missing stability measurements in all stability classes: 217

Zion Nuclear Station Period of Record: April - June 2008 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 2 14 34 30 17 0 97 NNE 1 28 17 4 0 0 50 NE 1 24 5 0 0 0 30 ENE 2 9 6 0 0 18 E 0 9 3 0 0 0 12 ESE 2 13 1 0 0 0 16 SE 0 .8 3 0 0 0 ii SSE 0 5 15 0 0 0 20 S 0 4 3 3 0 0 10 SSW 0 3 9 15 3 0 30 SW 0 5. 28 11 0 0 44 WSW 0 12 '39 15 1 0 67 W 0 10 3.0 6 1 0 47 WNW 0 10 27 .3 0 0 40 NW 0 6 34 3 0 0 43 NNW 0 1 3 3 0 0 7 Variable 0 0 0 0 0 0 0 Total 8 161 252 99 22 0 542 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: 217

Zion Nuclear Station Period of Record: April - June 2008 Stability Class - Slightly 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 3 44 38 13 98 NNE 10 48 17 0 75 NE 3 15 9 1 28 ENE 3 5 4 3 17 E 3 8 7 1 19 ESE S 8 2 0 15 SE 8 21 5 0 34 SSE 2 27 42 4 75 S 6 20 24 5 55 SSW 6 22 17 25 70 SW 14 23 21 5 63 WSW 5 32 22 2 62 W 7 32 21 0 60 9

WNW 2 17 0 28 NW 2 18 1 1 22 NNW 8 10 5 1 24.

Variable 0 0 0 0 0 Total 87 350 244 61 2 1 745 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: 217

Zion Nuclear Station Period of Record: April * - June 2008 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 7 15 1 0 23 NNE 5 12 2 0 19 NE 4 7 2 0 13 ENE 3 1 0 0 4 E 3 2 5 1 11 6 7 1 0 14 ESE SE 2 11 5 1 19 SSE 4 21 32 8 66 S 13 29 11 2 53 SSW 11 10 2 0 23 SW 13 13 0 0 26 WSW 13 12 0 0 25 W 14 17 0 0 31 WNW 5 9 0 0 14 NW 7 3 1 0 11 NNW 4 1 1 0 6 Variable 0 0 0 0 0 Total 112 170 63 12 0 358 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 1 4 0 0 0 0 5 NNE 5 3 1 0 0 0 9 NE 2 3 0 0 0 0 5 ENE 2 1 0 0 0 0 3 E 3 2 0 0 0 0 5 ESE 3 7 2 0 0 0 12 SE 0 8 3 0 0. 0 11 SSE 4 12 20 3 1 0 40 S 3 26 6 0 0 0 35 SSW 11 2 0 0 0 0 13 SW 9 4 1 0 0 0 14 WSW 17 12 0 0 0 0 29 W 13 . 6 0 0 0 0 19 WNW 2 0 0 0 0 0 2 NW 3 0 0 0 0 0 3 NNW 2 0 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 80 90 33 3 0 207 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 0 0 1 0 1 NE 0 0 4 1 0 0 5 ENE 0 0 3 1 0 0 4 E 0 1 0 2 0 0 3 ESE 0 2 0 1 0 0 3 SE 0 0 2 2 0 0 4 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. 0o 0 2 0

W 0 0 0 0 0 0o 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 Total 0 3 9 7 2 22 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: 217

Zion Nuclear Station Period of Record: April.- June 2008 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 NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW.

NNW Variable Total 6 21 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 0 0 0 1 1 NNE 0 0 3 2 4 4 13 NE 0 0 5 0 0 0 5 ENE j0 1 2 1 0 0 4 E 0 2 2 0 0 0 4 ESE 0 0 2 0 0 0 2 SE 0 0 0 3 0 0 3 SSE 0 0 1 1 0 0 2 S 0 0 0 1 0 0 1 SSW 0 0 0 0 3 0 3 SW 0 0 0 0 3 0 3 WSW 0 0 1 3 2 4 10 W 0 0 2 2 5 0 9 WNW 0 0 0 1 3 0 4 NW 0 0 0 0 1 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 18 14 21 9 65 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 8 11 13 15 51 NNE 35 25 9 17 92 NE 13 3 0 0 22 ENE 12 0 3 3 23 E 3 0 0 0 12 ESE 7 0 1 0 13 SE 6 2 2 0 13 SSE 9 4 1 0 17 S S 6 1 0 12 sSW 2 1 9 9 22 SW 6 18 6 3 33 WsW 9 32 17 12 70 W 10 21 10 4 47 WNW 11 19 16 0 47 NW 10 29 15 0 54 NNW 3 2 1 0 6 Variable 0 0 0 0 0 Total 1 44 149 173 104 63 534 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 217

Zion Nuclear Station Period of Record: April - June 2008 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 1 5 15 21 6 3 51 NNE 0 13 41 43 10 2 109 NE 1 11 16 7 4 0 39 ENE 0 5 5 4 3 2 19 E 1 5 8 5 9 2 30 ESE 4 4 6 2 4 0 20 SE 2 10 8 10 5 0 35 SSE 0 8 20 25 15 1 69 S 0 9 8 22 9 4 52 SSW 0 4 3 5 27 10 49 SW 0 2 i9 30 8 4 63 WSW 0 6 20 29 10. 1 66 W 0 5 13 31 9 1 59 WNW 1 2 11 24 7 0 45 NW 0 2 7 11 0 0 20 NNW 1 1 8 9 1 1 21 Variable 0 0 0. 0 0 0 0 Total 11 92 208 278 127 31 747 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 2 1 0 3 NNE 3 12 3 0 20 NE 11 4 3 2 23 ENE .5 6 2 1 16 E 8 1 1 1 14 ESE 3 4 12 SE 5 5 5 28 5

SSE 7 24 17 62 S 12 ii 13 11 53 SSW 1 5 18 4 19 SW 2 7 3 30 18 WSW 1 5 4 19 W 1 5 7 0 13 WNW 4 4 16 0 24 NW 1 3 6 2 12 NNW 2 3 6 0 12 Variable 0 0 0 0 0 Total 10 88 122 54 20 360 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: 217

Zion Nuclear Station Period of Record: April - June 2008 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 1 1 3 0 0 5 2

NNE 0 2 0 0 4 2 0 1 0 5 NE 1 ENE 1 1 0 0 0 2 E 2 1 1 0 0 4 ESE 1 3 0 1 2 7 SE 0 7 2 1 3 17 SSE 0 2 S 7 4 19 S 0 5 4 25 15 54 SSW 0 7 12 22 ,4 45 SW 2 6 4 4 0 16 WSW 1 1 1 6 4 13 W 0 0 2 2 0 4 WNW 0" 3 4 0 7 NW 0 3 1 0 0 4 NNW 0 2 0 0 2 Variable 0 0 0 0 0 Total 9 43 40 73 32 11 208 Hours of calm in this stabilit y class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 217

Zion Nuclear Station Period of Record: July - September 2008 Stability Class - Extremely Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 2 20 0 22 NE 0 7 9 0 16 ENE 0 7 3 0 10 E 0 6 0 7 ESE 0 15 0 17 SE 0 5 0 5 SSE 0 0 0 0 S 0 0 0 0 SSW 0 0 0 0 SW 0 0 0 0 WSW 0 0 0 0 W 0 0 0 0 WNW 0 0 0 0 NW 0 0 0 0 NNW 0 0 0 0

Variable 0 0 0 0 0 0 0

Total 42 35 0 0 0 77 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 2008 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 0 1 0 0 1 NNE 0 4 11 0 0 0 15 0 8 2 0 0 0 10 1NE 0 1 0 0 0 0 1 E 0 4 2 0 0 0o 6 ESE 0 2 1 0 0 0 3 SE 0 1 1 0 0 0 2 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0

SW 0 0 0 0 0 0 0~

WSW 0 0 2 0 0 0 2 W 0 0 0 0 0 .0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0

0 0 0 0 0 0 0

Variable 0 0 0 0 0 0 0

Total 0 20 19 1 0 40 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 2008 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 1 5 8 NNE 3 9 12 NE 11 3 14 ENE 5 2 7 E 9 1 10 ESE 10 0 10 SE 1 0 1 SSE 2 0 2 S 0 0 0 SSW 1 0 1 Sw 0 9 9 WSW 4 10 14 W 3 5 10 WNW 4 3 7 NW 0 1 1 NNW 0 0 0 Variable 0 0 0 Total 54 48 0 106 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 2008 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 0 22 25 1 0 0 48 NNE 1 48 19 2 0 0 70 NE 2 14 4 2 0 0 22 ENE 6 11 1 2 0 0 20 E 2 13 2 0 0 0 17 ESE 2 20 2 0 0 0 24 SE 4 35 4 0 0 0 43 SSE 0 16 38 11 0 0 65 S 0 12 2 1 0 0 15 SSW 3 9 13 0 0 0 25 SW 0 12 16 5 0 0 33, WSW 3 32 15 0 0 0 50 W 3 26 27 4 0 0 60 WNW 2 22 14 0 0 0 38 NW 1 20 15 0 0 0 36 NNW 1 12 8 0 0 0 21 Variable 0 0 0 o 0 0 0 Total 30 324 205 28 0 0 587 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 2008 Stability Class - Slightly 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 10 31 21 1 0 63 NNE 4 25 33 2 0 64 NE 4 16 17 5 0 42 ENE 5 9 3 .0 0 17 E 6 11 7 1 0 25 ESE 5 11 4 0 0 20 SE 5 31 17 0 0 53 SSE 6 25 38 17 0 86 S 12 47 6 0 0 65 SSW 4 37 20 0 0 61 SW 14 37 15 0 0 66 WSW 9 58 18 0 0 85 W 11 59 8 0 0 78 WNW 8 53 3 0 0 64 NW 1ii 35 4 0 0 50 NNW 7 23 4 0 0 34 Variable 0 0 0 0 0 0 Total 121 508 218 26 0 0 873 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: 0

Zion Nuclear Station Period of Record: July - September 2008 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 7 3 ii NNE 3 1 5 NE 2 0 2 ENE 1 1 2 E 1 1 2 ESE 1 4 5 SE 1 3 5 SSE 3 9 14 S 17 23 35 SSW 26 12 38 SW 13 21 34 WSW 23 31 54 W 37 20 57 WNW 17 12 30 NW 21 23 44 NNW 12 5 17 Variable 0 0 0 Total 179 169 0 355 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: 0

Zion Nuclear Station Period of Record: July - September 2008 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 2 NNE 0 0 0 0 NE 0 0 0 0 ENE 0 0 0 E 0 0 0 0 ESE 0 0 0 0 SE 0 1 0 1 SSE 0 3 0 3 S 3 2 0 5 SSW 16 3 0 SW 8 0 9 WSW 16 3 0 19 W 42 21 0 63 WNW 24 8 0 32 NW 9 3 0 12 NNW 2 0 0 2 Variable 0 0 0 0 0 0 0 Total 122 45 0 0 0 0 167 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:

Zion Nuclear Station Period of Record: July - September 2008 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 7 9 0 16 NE 0 17 4 0 21 ENE 0 6 2 0 8 E 0 5 0 0 6 ESE 0 13 1 0 14 SE 0 11 0 12 SSE 0 0 0 0 0 S 0 0 0 0 0 SSW 0 0 0 0 SW 0 0 0 0 0 WSW 0 0 0 0 0 W 0 0 0 0 0 WNW 0 0 0 0 0 0

NW 0 0 0 0 0

NNW 0 0 0 0 0

Variable 0 0 0 0 Total 0 59 17 0 77 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 2008 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 1 NNE S 14 NE 10 10 ENE 2 2 E 0 0 ESE 6 8 SE 1 3 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 2 W 0 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 24 14 0 40 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 2008 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 2 NNE 0 12 5 17 NE 4 9 1 14 ENE 3 1 2 6 E 5 3 0 8 ESE 3 4 0 7 SE 3 4 1 8 SSE 0 2 0 2 S 0 0 0 0 SSW 0 0 0 0 SW 0 4 2 6 WSW 0 5 9 14 W 0 3 8 13 WNW 0 4 1 6 NW 0 1 2 3 NNW 0 0 0 0 Variable 0 0 0 0 Total 18 52 32 0 106 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 2008 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 8 13 14 3 38 NNE 14 39 15 3 71 NE 15 11 2 5 34 ENE 8 3 2 2 17 E 10 3 0 0 14 ESE 13 1 6 0 21 SE 21 22 4 0 47 SSE 8 31 12 7 58 S 6 13 7 2 29 SSW 3 4 4 1 12 SW 2 8 14 8 34 WSW 4 .21 14 0 39 W 13 24 29 10 76 wNW 4 11 14 4 34 NW 7 18 18 1 44 NNW 1 11 7 0 19 Variable 0 0 0 0 0 Total 7 137 233 162 46 2 587 Hours Hours of of calm in this stability class: 0 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 2008 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 6 23 17 5 1 52 NNE 10 19 24 12 0 66 NE 8 20 22 15 3 68 ENE 3 8 4 3 0 20 E 5 4 3 0 23 ESE 4 10 7 0 23 SE 9 21 18 8 0 58 SSE 11 23 13 0 78 5 20 26 4 0 56 S

SSW 4 17 19 0 0 40 SW 6 20 39 5 0 70 WSW 4 28 43 5 0 81 W 4 36 39 8 1 89 WNW 4 14 35 0 00 53 NW 13 36 2 57 0

NNW 4 16 19 0 39 0

Variable 0 0 0 0 0 Total 13 93 292 385 85 5 873 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes: 0*

Zion Nuclear Station Period of Record: July - September 2008 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 14 7 28 NNE 12 1 23 NE 2 0 9 ENE 5 0 12 E

1 0 7 ESE 1 1 7 SE 7 2 13 SSE 8 4 17 S 14 12 33.

SSW 12 10 26 SW 17 16 37 WSW 8 25 44 W 8 27 43 WNW 6 10 21 NW 5 9 18 NNW 3 10 18 Variable 0 0 0 Total 18 62 123 134 19 0 . 356 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 2008 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 4 5 0 0 9 NNE 0 4 5 0 0 9 NE 1 7 1 0 0 9 ENE 6 4 3 0 0 13 E 2 2 0 0 5 ESE 2 1 0 0 6 SE 0 0 0 0 2 SSE 2 0 0 0 4 S 1 2 6 0 15 SSW 1 0 18 SW 2 5 5 0 15 WSW 0 7 3 0 12 W 0 7 4 0 15 WNW 0 5 8 0 17 NW 1 2 0 13 NNW 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 18 63 45 40 1 .0 167 Hours of calm in this stability class: 0 Hours of missing wind measu'rements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0

Zion Nuclear Station Period of Record: October - December2008 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 0 0 0 0 0 0 NNE 0 0 1 0 0 0 1 NE 0 0 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 2 0 0 0 2 SE 0 1 1 0 0 0 2 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 WNW: 0 0 0 0, 0 0 0 NW 0 0 0 0 0 0 0 NNaW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 5 0 0 0 6 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: October - December2008 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 0 0 0 0 0 NNE 0 0 3 0 0 0 3 NE 0 0 1 0 0 0 1 ENE 0 1 0 0 0 0 1 E 0 1 0 0 0 0 1 ESE 0 1 1 0 0 0 2 SE 0 0 1 0 0 0 1 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 3 6> 0 0 0 9 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: October - December2008 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 1 NNE 2 3 NE 2 0 ENE 2 0 E 3 0 ESE 3 2 SE 2 1 SSE 0 0 S 0 1 SSW 0 1 SW 0 2 WSW 0 1 W 0 .2 WNW 0 4 NW 0 4 NNW 0 1 Variable 0 0 Total 14 23 0 44 Hours of calm in this stability class: 0 Hours of missing wind measirements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: October - December2008 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 4 7 4 0 0 15 NNE 0 9 7 0 0 0 16 NE 1 11 2 3 3 0 20 ENE 0 1 1 2 4 1 9 E 0 3 7 5 3 0 18 ESE 1 1 23 14 1 0 40 SE 0 8 16 7 0 0 31 SSE 0 7 23 19 9 0 58 S 0 7 12 2 1 0 22 SSW 3 12 24 10 0 0 49 SW i 11 25 3 0 0 40 WSW 0 14 23 '20 4. 61 0

W 1 28 56 27 9 121 0

WNW 1 21 66 3 0 91 0

NW 1 26 39 14 0 80 0

NNW 1 21 22 20 0 64 0

Variable 0 0 0 0 0 0 Total 10 184 353 153 34 1 735 Hours of calm in this stability class: 0 Hours of missing wind meastirements in this stability class: 17 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: October - December2008 Stability Class - Slightly 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 6 7 8 22 NNE 1 10 9 10 33 NE 0 4 9 1 15 ENE 0 2 4 2 10 E 1 10 13 1 25 ESE 3 6 22 7 38 SE 2 18 15 .7 42 SSE 0 13 29 11 57 S 7 51 20 24 103 SSW 16 58 48 39 162 SW il 36 40 6 93 WSW 7 40 24 6 78 W 7 57 41 10 121 WNW 5 37 42 9 93 NW 5 59 58 8 130 NNW 1 22 12 3 38 Variable 0 0 0 0O 0 Total 66 429 393 152 19 1 1060 Hours of calm in this st~ability class: 1.

Hours of missing wind measurements in this stability class: 29 Hours of missing stability measurements in all stability classes: 1 4

Zion Nuclear Station Period of Record: October - December2008 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 0 0 4 NNE 0 0 0 0 0 NE 1 .0 0 0 1 Co ENE 0 1 0 1 0

E 1 2 0 3 0

E.SE 0 0 0 0 0

SE 0 0 0 0 0

SSE 2 7 15 28 0

S 7 32 5 46 0

SSW 11 16 0 27 0

SW 7 4 0 0 11 0

wSW 16 4 4 24 0

W 7 9 0 16 0

WNW 3 3 0 6 0

NW 2 11 0 13 0

NNW 1 4 0 5 0

Variable 0 0 0 0 0

Total 59 96 24 0 185 Hours of calm in this stabi.lity 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: October - December2008 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 0 0 N 0 0 0 0 0 0 NNE 0 0 0 0 0 0 NE 0 0 0 0 0 0 ENE 0 0 0 0 0 0 E 0 0 0 0 0 0 ESE 0 0 0 0 0 0 SE 0 0 0 0 SSE 0 3 10 1 0 14 S 7 10 6 o 0 23 0 0 SSW 1 3 0 4 0 0 SW 3 2 0 5 0 0 WSW 6 3 0 9 0 0 W 21 11 0 32 0 0 WNW 12 7 0 19 0 0 NW 2 7 0 9 0 0 NNW 0 0 0 0 0 0 Variable 0 0 0 0 Total 52 46 16 1 0 0 115 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: 4

Zion Nuclear Station Period of Record: October - December2008 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 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 1 SE 0 0 1 0 2 SSE 0 0 0 0 0 S 0 0. 0 0 0 SSW 0 0 0 0 0 SW 0 0 0 0 0 WSW 0 0 0 0 0 W 0 0 0 00 WNW 0 0 0 0 0 NW 0 0 0 0 0 NNW 0 0 0 0 0 Variable 0 0 0 0 0 Total 0 0 3 0 3 0 6 Hours of calm in this stability class: 0 Hours of missing wind meastirements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: October - December2008 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 0 0 0 0 NNE 0 0 2 1 0 0 3 NE 0 0 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 1 1 0 0 0 2 ESE 0 0 0 0 1 0 1 SE 0 0 1 0 1 0 2 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 1 5 1 2 0 9 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: October - December2008 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 0 1 0 0 1 NNE 0 0 6 0 0 0 6 NE 0 0 1 0 0 0 1 ENE 0 1 1 0 0 0. 2 E 0 1 0 0 1 0 2 ESE 0 0 4 0 5 0 9 SE 0 1 2 1 0 0 4 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 2 1 0 3 SW 0 0 0 1 1 0 2 WSW 0 0 1 0 0 0 1 W 0 0 0 3 0 2 5 WNW 0 0 0 4 0 0 4 NW 0 0 0 2 1 0 3 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 3 16 14 9 2 44 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: October - December2008 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 7 5 0 3 18 NNE 7 5 0 0 15 NE 6 2 0 6 19 ENE 0 0 1 6 8 E 0 7 3 3 16 ESE 3 13 20 3 39 SE 10 11 16 7 45 SSE 10 14 16 2 45 S 7 9 3 3 25 SSW 9 20 14 0 48 SW 8 22 3 1 38 WSW 12 20 13 14 64 W 16 36 18 26 106 WNW 20 69 13 2 ili NW 20 34 21 3 83 NNW 15 12 20 4 59 Variable 0 0 0 0 0 Total 65 150 279 161 83 739 Hours of calm in this stability class: 0 Hours of missing wind measufrements in this stability class: 13 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: October - December2008 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 3 7 3 6 19 NNE 0 8 12 4 10 34 NE 0 3 12 1 2 19 ENE 1 1 4 2 2 10 E 0 6 11 2 0 19 ESE 3 3 17 8 5 38 SE 0 20 13 19 8 60 SSE 3 10 17 5 5 40 S 8 24 31 15 20 99 SSW 10 40 56 47 i1 164 SW 3 24 47 16 3 93 WSW 5 29 30 9 5 78 W 4 29 41 17 12 103 WNW 8 15 40 27 6 96 NW 3 13 82 27 3 129 NNW 1 14 33 4 2 55 Variable 0 .0 0 0 0 0 Total 6 49 242 453 206 100 1056 Hours of calm in this stability class: 0 Hours of missing wind measilrements in this stability class: 34 Hours of missing stability measurements in all stability classes: 4

Zion Nuclear Station Period of Record: October - December2008 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 1 5 1 0 0 9 NNE 0 3 0 0 0 3 NE 0 3 0 0 0 3 ENE 0 0 0 0 0 0 E 1 2 1 0 0 4 ESE 0 2 0 0 4 SE 0 5 2 0 0 8 SSE 0 3 2 7 4 19 S 1 9 16 14 2 42 SSW 1 10 23 37 2 0 SW 1 2 1 0 0 4 WSW 0 3 3 1 0* 8 W 0 9 7 4 0 21 WNW 0 5 5 0 0 10, NW 0 2 0 0 3 NNW 0 2 6 0 0 12 Variable 0 0 0 0 0 0 Total 5 14 65 29 6 187 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: October - December2008 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 5 3 7 0 0 0 15 NNE 0 2 3 0 0 0 5 NE 1 0 1 0 0 0 2 ENE 0 1 1 0 0 0 2 E 1 0 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 1 0 0 0 0 0 1 SSE 0 2 01 0 1 0 3 S 0 3 7 16 8 0 34 SSW 0 0 2 9 2 0 13 SW 1 3 3 1 0 0 8 WSW 1 2 0 0 0 0 3 w 1 1 0 0 0 0 2 WNW 0 0 1 3 0 0 4 NW 2 0 2 2 0 0 6 NNW 5 3 9 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 18 20 36 31 11 0 116 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

Intentionally left blank APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Docket No: 50-295 50-304 ZiO'rN Nr*UCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2008 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Zion Nuclear Power Station Zion, IL 60099 May 2009

Table Of Contents I. Sum m ary and Conclusions ............................................................................................. 1 II. Intro d uc tio n ........................................................................................................................ 3 A. Objectives of the RGPP .................................................................................... 3 B. Implementation of the Objectives ................................. 3 C. Program Description ......................................................................................... 4 D. Characteristics of Tritium (H-3) ......................................................................... 5 III. Program Description ..................................................................................................... 5 A. Sam ple Analysis ................................................................................................ 5 B. Data Interpretation ........................................................................................... 6 C. Background Analysis ......................................................................................... 7

1. Background Concentrations of Tritium .................................................. 8 A. Groundwater 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. Trends ............................................................................................................ 11 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, 2008 Figures Figure A-i: Radiological Groundwater Protection Program Groundwater and Surface Water Locations of the Zion Nuclear Power Station, 2008 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table B-11.1 Concentrations of Tritium and Strontium in Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2008.

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 2008.

During that time period, 32 analyses were performed on 16 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.exeloncorp.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 detected at concentrations greater than their respective Lower Limits of Detection (LLDs) in any of the groundwater or surface water samples.

Strontium-89/90 was not detected at a concentration greater than the LLD of 2.0 picoCuries per liter (pCi/L) in any of the groundwater or surface water samples tested.

Tritium was not detected in any of the surface water samples analyzed. Low levels of tritium were detected at a concentration greater than the LLD of 200 pCi/L in one groundwater sample analyzed. 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 II. 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/powergen/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 2008.

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 this report for reporting consistency with the AREOR.

C. Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life, and 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:

" Kenosha, Wisconsin (intake located 10 miles north of the station)

Lake County Public Water District (intake located 1.1 miles north of the Station)

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

North Chicago, Illinois (intake located 10 miles south of the Station)

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:

Kenosha, Wisconsin (intake located 10 miles north of the station)

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 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.

RadNet provides 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-11.1, Appendix B). Tritium was detected in one of the groundwater samples analyzed. The tritium concentration was 168 +/- 100 pCi/L. 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 detected in any of the samples and the required LLD of 2.0 pCi/liter was met. (Table B-1.1, Appendix B)

(Table B-11.1, Appendix B)

Gamma Emitters No gamma-emitting radionuclides were detected in 2008.

(Table B-1.2, Appendix B) (Table B-II.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 made available to state and federal regulators as well as the public on an Exelon web site:

http://www.exeloncorp.com/ourcompanies/powergen/nuclear/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 APPENDIX A LOCATION & DIRECTION

ATTACHMENT 1: Sampling Locations for the Radiological Groundwater Protection Program, Zion Station, 2008.

Site Site Type Temporary/Permanent Distance MW-ZN-01S 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-0BS Monitoring Well Permanent On-Site MW-ZN-09S Monitoring Well Permanent On-Site MW-ZN-1OS Monitoring Well Permanent On-Site MW-ZN-11 S Monitoring Well Permanent On-Site SW-ZN-1 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, 2008 A-2

APPENDIX B DATA TABLES

TABLE B-I.1 CONCENTRATIONS OF TRITIUM AND STRONIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 MW-ZN-01S 09/23/08 168 _ 100 <1 MW-ZN-01S 04/21/08

188 MW-ZN-02S 09/23/08

139 <1 MW-ZN-02S 04/21/08

197 MW-ZN-03S 09/24/08

140 MW-ZN-03S 04/21/08

193 MW-ZN-04S 09/24/08

144 <1 MW-ZN-04S 04/21/08

193 MW-ZN-09S 09/23/08

141 <1 MW-ZN-09S 04/21/08

198 MW-ZN-1 OS 09/23/08

137 MW-ZN-1OS 04/22/08

195 MW-ZN-11 S 09/23/08

143 <1 MW-ZN-11 S 04/22/08

192 B-1

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD MW-ZN-01 S 09/23/08 < 39 < 73 <4 <5 < 10 <4 <9 <5 <7 <4 <4 < 38 < 12 MW-ZN-10S 09/23/08 < 40 < 89 <4 <5 < 11 <4 < 11 <5 <8 <4 <4 < 36 < 14 MW-ZN-11S 09/23/08 < 37 < 74 <4 <4 < 10 <3 <7 <4 <7 <3 <'3 < 35 < 12 MW-ZN-02S 09/23/08 < 50 < 44 <6 <6 < 10 <5 < 12 <6 <9 <5 <5 < 38 < 14 MW-ZN-03S 09/24/08 < 45 < 47 <4 <4 < 11 <4 <8 <5 <8 <4 <4 < 35 <9 MW-ZN-04S 09/24/08 < 43 < 93 <4 <5 <8 <4 <7 <4 <8 <4 <5 < 36 < 10 MW-ZN-09S 09/23/08 < 49 < 84 <5 <6 < 12 <5 < 12 <5 <7 <5 <5 < 45 < 15

TABLE B-II.1 CONCENTRATIONS OF TRITIUM AND STRONIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 SW-ZN-01 04/21/08 < 188 SW-ZN-01 09/23/08 < 146 <2 B-3

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR STATION, 2008 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STO COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD

.....ii SW-ZN-01 09/23/08 <49 <40 <4 < 5 < 12 <5 <9 <5 < 10 <4 <4 <44 < 13

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SUMMARY

SUMMARY

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