0CAN050603, Annual Radiological Environmental Operating Report for 2005

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Annual Radiological Environmental Operating Report for 2005
ML061370647
Person / Time
Site: Arkansas Nuclear  Entergy icon.png
Issue date: 05/15/2006
From: James D
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
0CAN050603
Download: ML061370647 (51)
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Text

Entergy Operations, Inc.

Enterg 1448 S.R. 333 Russellville. AR 72802 Tel 479-858-4888 OCAN050603 May 15, 2006 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

Annual Radiological Environmental Operating Report for 2005 Arkansas Nuclear One - Units 1 and 2 Docket Nos. 50-313 and 50-368 License Nos. DPR-51 and NPF-6

Dear Sir or Madam:

Arkansas Nuclear One (ANO), Units 1 and 2, Technical Specifications 5.6.2 and 6.6.2, respectively, require the submittal of an annual radiological environmental operating report for the previous year by May 15 of each year. Attached is the annual radiological environmental operating report for ANO for the year 2005. The radionuclides detected by the radiological environmental monitoring program during 2005 were significantly below regulatory limits; therefore, ANO plant operations during 2005 had no harmful effects nor resulted in any irreversible damage to the environment. This report fulfills the reporting requirements referenced above. Should you have any questions regarding this submittal, please contact Richard Scheide at (479) 858-4618.

This submittal contains no commitments.

Sincerely, Dale E. Jas Manager, icensing DEJ/rhs Attachment 17&-';s

cc: Dr. Bruce S. Mallett Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310 London, AR 72847 U.S. Nuclear Regulatory Commission Attn: Mr. Drew Holland Mail Stop 0-7 D1 Washington, DC 20555-0001

Attachment to OCAN050603 Page 1 of 49 ARKANSAS NUCLEAR ONE - UNITS 1 AND 2 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2005

Attachment to OCAN050603 Page 2 of 49 TABLE OF CONTENTS

SUMMARY

6

1.0 INTRODUCTION

9 1.1 Radiological Environmental Monitoring Program 9 1.2 Pathways Monitored 9 1.3 Land Use Census 10 2.0 INTERPRETATION AND TRENDS OF RESULTS 19 2.1 Air Particulate and Radioiodine Sample Results 19 2.2 Thermoluminescent Dosimetry Sample Results 19 2.3 Water Sample Results 20 2.4 Sediment Sample Results 21 2.5 Milk Sample Results 22 2.6 Fish Sample Results 22 2.7 Food Product Sample Results 22 2.8 Land Use Census Results 22 2.9 Interlaboratory Comparison Results 23 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

26 3.1 2005 Program Results Summary 26

Attachment to OCAN050603 Page 3 of 49 LIST OF TABLES TABLE 1.1 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM 11 TABLE 2.1 2005 LAND USE CENSUS 24 TABLE 3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

27

Attachment to OCAN050603 Page 4 of 49 LIST OF FIGURES FIGURE 1-1 SAMPLE COLLECTION SITES - NEAR FIELD 17 FIGURE 1-2 SAMPLE COLLECTION SITES - FAR FIELD 18 FIGURE 2-1 TLD RADIATION DOSE 25

Attachment to OCAN050603 Page 5 of 49 LIST OF ATTACHMENTS ATTACHMENT I 2005 RADIOLOGICAL MONITORING REPORT

SUMMARY

OF MONITORING RESULTS 31 ATTACHMENT 2 SEDIMENT DOSE CALCULATIONS 48

Attachment to OCAN050603 Page 6 of 49 Summary The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for Arkansas Nuclear One's (ANO's)

Radiological Environmental Monitoring Program (REMP) for the period January 1, 2005 through December 31, 2005. This report fulfills the requirements of ANO Unit 1 Technical Specification 5.6.2 and Unit 2 Technical Specification 6.6.2.

During 2005 as in previous years, ANO detected radionuclides attributable to plant operations at the discharge location (Station 8) where previously monitored liquid radioactive effluent from the plant is periodically discharged in accordance with the regulatory criteria established in the Offsite Dose Calculation Manual (ODCM). ANO personnel routinely monitor results from this area in order to note any trends. The review of results from this area indicates the following:

  • Tritium levels in the surface water media continue to be below regulatory reporting limits and are consistent with concentrations that would typically be seen at this location as discussed in Section 2.3 of this AREOR
  • Cesium-137 levels in the sediment media are not demonstrating any consistent increase in comparison to previous years. Review indicates that results for 2005 were within the range of previous operational levels as discussed in Section 2.4 of this AREOR.

Gross beta concentrations at the Station 14 (City of Russellville) indicator drinking water location continue to remain consistent with previous operational measurements and similar to the levels detected at the Station 57 (City of Danville) control drinking water location.

Radiological Environmental Monitoring Program ANO established the REMP prior to the station becoming operational (1974) to provide data on background radiation and radioactivity normally present in the area. ANO has continued to monitor the environment by sampling air, water, sediment, fish and food products, as well as measuring radiation directly. ANO also samples milk if milk-producing animals are present commercially within five miles of the plant.

The REMP includes sampling indicator and control locations within an approximately 20-mile radius of the plant. The REMP utilizes indicator locations near the site to show any increases or buildup of radioactivity that might occur due to station operation, and control locations farther away from the site to indicate the presence of only naturally occurring radioactivity. ANO personnel compare indicator results with control and preoperational results to assess any impact ANO operation might have had on the surrounding environment.

Attachment to OCAN050603 Page 7 of 49 In 2005, ANO personnel collected environmental samples for radiological analysis. They compared results of indicator locations with control locations and previous studies and concluded that overall no significant relationship exists between ANO operation and effect on the plant environs. The review of 2005 data, in many cases, showed undetectable radiation levels in the environment and in all instances, no definable trends related to significant pathways associated with ANO.

Harmful Effects or Irreversible Damage The REMP monitoring did not detect any harmful effects or evidence of irreversible damage in 2005. Therefore, no analysis or planned course of action to alleviate problems was necessary.

Reportin! Levels ANO's review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples due to ANO effluents, as outlined in Units 1 and 2 Offsite Dose Calculation Manual (ODCM) Table 2.6-3, when averaged over any calendar quarter. Therefore, 2005 results did not trigger any Radiological Monitoring Program Special Reports.

Radioactivity Not Attributable to ANO The ANO REMP has detected radioactivity attributable to other sources. These include the 25th Chinese nuclear test explosion in 1980 and the radioactivity plume release due to reactor core degradation at the Chernobyl Nuclear Power Plant in 1986. Prior to 1981, the ANO REMP detected radioactivity resulting from nuclear weapons testing, with Cesium-137 continuing to be periodically detected.

Comparison to Federal and State Programs ANO personnel compared REMP data to state monitoring programs as results became available. Historically, the programs used for comparison have included the U.S. Nuclear Regulatory Commission (NRC) TLD Direct Radiation Monitoring Network and the Arkansas Department of Health (ADH).

The NRC TLD Network Program was discontinued in 1998. Historically these results have compared to those from the ANO REMP. ANO TLD results continue to remain similar to the historical average and continue to verify that plant operation is not affecting the ambient radiation levels in the environment.

The ADH and the ANO REMP entail similar radiological environmental monitoring program requirements. These programs include collecting air samples and splitting or sharing sample media such as water, sediment and fish. Both programs have obtained similar results over previous years.

Attachment to OCAN050603 Page 8 of 49 Sample Deviations

  • Milk The REMP did not include milk sampling within five miles (8 kIn) of ANO in 2005 due to unavailability. ANO Units 1 and 2 ODCM require collection of milk samples if available commercially within 8 km (5 miles) of the plant. ANO personnel collected vegetation samples to monitor the ingestion pathway, as specified in the ODCM, because of milk unavailability.
  • Required Lower Limit of Detection (LLD) Values LLDs during this reporting period were within the acceptable limits required by Table 2.6-2 of the ANO Units 1 and 2 ODCM.
  • Air Samples Listed below are air sampler deviations that occurred during 2005 due to electrical power outages and equipment failure. These deviations did not result in the exceedance of the LLD values specified in the ODCM. As described in footnote (a) to ANO Units 1 and 2 ODCM Table 2.6-1, deviations are permitted from the required sampling schedule due to malfunction of sampling equipment and other legitimate reasons.

Station Sampling Period Comment 56 05/03/06 - 05/17/06 Pump running, however total run time was reduced due to possible thunderstorm electrical outages.

56 05/17/06 - 05/31/06 Pump running at 30 Ipm but volume totalizer not advancing. Volume totalizer was replaced.

6 11/15/05 - 11/29/05 Volume totalizer failed. Volume totalizer was replaced.

7 11/29/06 - 12/12/06 Pump found not running and totalizer indicates the pump was off for approximately one hour. Out of service pump was replaced with a new pump.

  • Missed Samples There were no missed samples in the reporting period.
  • Unavailable Results ANO received analytical results in adequate time for inclusion in this report. In addition, ANO's review identified no missing results.

Attachment to OCAN050603 Page 9 of 49 Program Modifications ANO made no modifications to the REMP during 2005.

Attachments contains results of air, TLD, water, sediment, fish, and food product samples collected in 2005. TLDs were analyzed by Waterford-3 Dosimetry. All remaining samples were analyzed by River Bend Station's (RBS) Environmental Laboratory. Attachment 1 also contains RBS' participation in the interlaboratory comparison program during 2005. contains dose calculations performed for sediment using a generalized equation from Regulatory Guide 1.109, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I."

1.0 Introduction 1.1 Radiological Environmental Monitoring Program ANO established the REMP to ensure that plant operating controls properly function to minimize any associated radiation endangerment to human health or the environment. The REMP is designed for:

  • Analyzing important pathways for anticipated types and quantities of radionuclides released into the environment.
  • Considering the possibility of a buildup of long-lived radionuclides in the environment and identifying physical and biological accumulations that may contribute to human exposures.
  • Considering the potential radiation exposure to plant and animal life in the environment surrounding ANO.
  • Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

1.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways are monitored as required by the ANO ODCM. A description of the ANO REMP utilized to monitor the exposure pathways is described in Table 1.1 and shown in Figures 1-1 and 1-2.

Section 2.0 of this report provides a discussion of 2005 sampling results and Section 3.0 provides a summary of results for the monitored exposure pathways.

Attachment to OCAN050603 Page 10 of 49 1.3 Land Use Census ANO personnel conduct a land use census biannually as required by ANO Units I and Unit 2 ODCM Section 2.6.2. The purpose of this census is to identify changes in uses of land within five miles of ANO that would require modifications to the REMP or ODCM. The most important criteria during this census are to determine location in each sector of the nearest:

1) Residence
2) Animal milked for human consumption
3) Garden of greater than 500 square feet producing broadleaf vegetation
  • The method used by ANO personnel for conducting the land use census is as follows:
  • ANO personnel conduct door-to-door field surveys and/or aerial surveys in each meteorological sector out to five miles in order to locate the nearest resident and milk animal.
  • Consultation with local agricultural authorities is used in instances when personal contact cannot be made.
  • As a result of these surveys, the following information is obtained in each meteorological sector:
1) Nearest permanent residence
2) Nearest milking animal
  • ANO personnel identify locations on the map, measure distances to ANO (or use a GPS system) and record results.
  • Locations, if any, are identified which yield a calculated dose or dose commitments greater than those currently calculated in the ODCM.
  • ANO personnel compare results to previous census.
  • ANO personnel do not perform a garden census since ODCM Section 2.6.2 allows the routine sampling of broadleaf vegetation in the highest D/Q sector near the site boundary in lieu of the garden census.

Attachment to OCAN050603 Page 11 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Airbome Radiolodine and Particulates 2 samples close to the Site Boundary, in Station 2 (243 - 0.5 miles) - South of the Continuous operation of Radiolodine Canister - Analyze at (or near) different sectors with the highest sewage treatment plant. sampler with sample least once per 14 days for 1-131.

calculated annual average groundlevel Station 56 (264 - 0.4 miles) - West end of the collection as required by DIQ. sewage treatment plant. dust loading but at least Particulate Sampler - Analyze for once per 14 days. gross beta radioactivity following once__per_14_days._filter change.

Radlolodine and Particulates I sample from the vicinity of a community Station 6 (1110 - 6.8 miles) - Entergy local having the highest calculated annual office in RusselMville (305 South Knoxville average groundlevel D/Q. Avenue).

Radiolodine and Particulates I sample from a control location 15-30 Station 7 (210* - 19.0 miles) - Entergy Supply km (10 - 20 miles) distance. Yard on Highway 10 in Danville.

Radlolodlne and Particulates One location sampled voluntarily by Station 1 (88- - 0.5 miles) - Near the ANO. meteorology tower.

Direct TLDs Radiation 16 inner ring stations with two or more Station I (88§ - 0.5 miles) - On a pole near the Once per 92 days. Gamma Dose - Once per 92 days.

dosimeters in each meteorological sector meteorology tower.

in the general area of the Site Boundary Station 2 (243 - 0.5 miles) - South of the sewage treatment plant.

Station 3 (58 - 0.7 miles) - West of ANO Gate

  1. 2 on Highway 333 (approximately 0.35 miles)

Attachment to OCAN050603 Page 12 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation 16 inner ring stations with two or more Station 4 (181 - 0.5 miles) - West of May Once per 92 days. Gamma Dose - Once per 92 dosimeters in each meteorological Cemetery entrance on south side of the road. days.

sector in the general area of the Site Station 56 (264 - 0. miles) - West end of the Boundary sewage treatment plant.

Station 108 (3060 - 0.9 miles) - South on Flatwood Road on a utility pole.

Station 109 (291? - 0.6 miles) - Utility pole across from the junction of Flatwood Road and Round Mountain Road.

Station 110 (1360 - 0.8 miles) - Bunker Hill Lane on the first utility pole on the left.

Station 145 (28e - 0.6 miles) - Near west entrance to the RERTC on a utility pole.

Station 146 (450 - 0.6 miles) - South end of east parking lot at RERTC on a utility pole.

Station 147 (61 - 0.6 miles) - West side of Bunker Hill Road, approximately 100 yards from intersection with State Highway 333.

Station 148 (1220 - 0.6 miles) - Intersection of Bunker Hill Road with Scott Lane on county road sign post.

Attachment to OCAN050603 Page 13 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDS Radiation 16 inner ring stations with two or more Station 149 (156 - 0.5 miles) - On a utility pole Once per 92 days. Gamma Dose - Once per 92 dosimeters in each meteorological on the south side of May Road.

days.

sector in the general area of the Site Station 150 (2050 - 0.6 miles) - North side of Boundary May Road on a utility pole past the McCurley Place turn.

Station 151 (2250 - 0.4 miles) - West side of sewage treatment plant near the lake on a metal post.

Station 152 (3350 - 0.8 miles) - North side of State Highway 333 on a London City limit sign post.

TlDs 8 stations with two or more dosimeters Station 6 (111 - 6.8 miles) - Entergy local in special interest areas such as office in Russellville (305 South Knoxville Avenue).

population centers, nearby residences, schools, and in 1 - 2 areas to serve as Station 7 (2101 - 19.0 miles) - Entergy Supply control locations. Yard on Highway 10 in Danville.

Station 111 (120" - 2.0 miles) - Marina Road on a utility pole on the left just prior to curve.

Station 116 (318" - 1.8 miles) - Highway 333 and Highway 64 in London on a utility pole north of the railroad tracks.

Attachment to OCAN050603 Page 14 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation 8 stations with two or more dosimeters Station 125 (46' - 8.7 miles) - College Street on Once per 92 days. Gamma Dose - Once per 92 in special interest areas such as a utility pole at the southeast comer of the red days.

population centers, nearby residences, brick school building.

schools, and in 1 - 2 areas to serve as Station 127 (100- - 5.2 miles) - Arkansas Tech control locations. Campus on a utility pole across from Paine Hall.

Station 137 (1510 - 8.2 miles) - On a speed limit sign on the right in front of the Morris R.

Moore Arkansas National Guard Armory.

Station 153 (304" - 9.2 miles) - Knoxville Elementary School near the school entrance gate on a utility pole.

Waterbome Surface Water I indicator location (influenced by Station 8 (166- - 0.2 miles) - Plant discharge Once per 92 days. Gamma isotopic and tritium plant discharge) canal. analyses once per 92 days.

1 control location (uninfluenced by Station 10 (950 - 0.5 miles) - Plant intake canal.

plant discharge)

Drinking Water I indicator location (influenced by Station 14 (70 - 5.1 miles) - Russellville city Once per 92 days. 1-131, gross beta, gamma plant discharge) water system from the Illinois Bayou. isotopic and tritium analyses I control location (uninfluenced by Station 57 (2080 - 19.5 miles) - Danville public once per 92 days.

plant discharge) water supply treatment on Fifth Street.

Attachment to OCAN050603 Page 15 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Waterbore Sediment 1 indicator location (influenced by Station 8 (243 - 0.9 miles) - Plant discharge Once per 365 days. Gamma isotopic analysis once plant discharge) canal. per 365 days.

I control location (uninfluenced by Station 16 (287' - 5.5 miles) - Panther Bay on plant discharge) south side of Arkansas River across from mouth of Piney Creek.

Ingestion Milk I indicator sample location within 8 km Currently, no available milking animals within 8 Once per 92 days. Gamma isotopic and 1-131 distance if commercially available. km of ANO. analyses once per 92 days.

1 control sample location at a distance of >8 km, when an indicator exists.

Fish 1 sample of commercially and/or Station 8 (212- - 0.5 miles) - Plant discharge Once per 365 days. Gamma isotopic on edible recreationally important species in canal. portions once per 365 days.

vicinity of plant discharge.

1 sample of same species in area not Station 16 (287 - 5.5 miles) - Panther Bay on influenced by plant discharge. south side of Arkansas River across from mouth of Piney Creek.

Attachment to OCAN050603 Page 16 of 49 Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Ingestion Food Products 1 sample of broadleaf (edible or non- Station 13 (273' - 0.5 miles) - West from ANO Three per 365 days. Gamma isotopic and 1-131 edible) near the Site Boundary from toward Gate 4 onto Flatwood Road. analyses three times per 365 one of the highest anticipated annual average groundlevel D/a sectors, if days.

milk sampling is not performed.

1 sample location of broadleaf Station 55 (2080 - 16.5 miles) - Intersection of vegetation (edible or non-edible) from Highway 27 and 154.

a control location 15 - 30 km distant, if milk sampling is not performed.

Attachment to 0CAN050603 Page 17 of 49 FIGURE 1-1 SAMPLE COLLECTION SITES - NEAR FIELD

Attachment to OCAN050603 Page 18 of 49 FIGURE 1-2 SAMPLE COLLECTION SITES - FAR FIELD t

Arkansas Nuclear One-REMP Sample Locations (Far FiefId

Attachment to OCAN050603 Page 19 of 49 2.0 Interpretation and Trends of Results 2.1 Air Particulate and Radioiodine Sample Results The REMP has detected radioactivity in the airborne pathway attributable to other sources.

These include the 25th Chinese nuclear test explosion in 1980 and the radioactive plume release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986.

During 2005, Iodine-131 was not detected in the radioiodine cartridges, as has been the case in previous years. In addition, indicator gross beta air particulate results for 2005 were within the range of levels obtained in previous years of the operational REMP and well below preoperational levels as seen below. Results are reported as annual average pCi/m 3 .

Monitoring Period Result 2000 - 2004 (Minimum Value) 0.020 2005 Value 0.026 2000 - 2004 (Maximum Value) 0.030 Preoperational 0.050 In the absence of plant-related gamma radionuclides, gross beta activity is attributed to naturally occurring radionuclides. Table 3.1, which includes gross beta concentrations and provides a comparison of the indicator and control means and ranges, emphasizes the consistent trends seen in this pathway to support the presence of naturally occurring activity.

Therefore, it can be concluded that the airborne pathway continues to be unaffected by ANO operations.

2.2 Thermoluminescent Dosimetry Sample Results ANO reports measured dose as net exposure (field reading less transit reading) normalized to 92 days and relies on comparison of the indicator locations to the control as a measure of plant impact. ANO's comparison of the inner ring and special interest area TLD results to the control, as seen in Table 3.1, identified no noticeable trend that would indicate that the ambient radiation levels are being affected by plant operations. In addition, the inner ring value of 6.9 mrem shown in Table 3-1 is within the historical bounds of 1997 - 2004 annual average results, which have ranged from 6.9 to 9.6 mrem.

Gamma radiation dose in the reporting period was further compared to historical control location readings for previous years as shown in Figure 2-1. ANO's comparison of the results to the control indicates that the ambient radiation levels are unaffected by plant operations.

Although the second quarter reading for TLD Station 1 shown in Figure 2-1 was slightly above the upper (+) three standard deviation range value of 10.4 mrem for the historical maximum control location, ANO considers the difference to be insignificant since there has been no identifiable trends associated with this station.

Attachment to OCAN050603 Page 20 of 49 Based on the above comparisons, ANO concluded that the ambient radiation levels are not being affected by plant operations.

2.3 Water Sample Results Analytical results for 2005 surface water and drinking water samples were similar to those reported in previous years.

Surface water samples were collected and analyzed for gamma radionuclides and tritium.

Gamma radionuclides were below detectable limits which is consistent with results seen in previous operational years. Tritium continues to be detected at the indicator location (Station

8) where previously monitored liquid radioactive effluent from the plant is periodically discharged in accordance with the regulatory criteria established in the ODCM. However, the levels detected are consistent with concentrations that would typically be seen at this location as shown below. Results are reported as annual average pCi/l.

Monitoring Period Concentration 2000 - 2004 (Minimum Value) 272.0 2005 Value 876.3 2000 - 2004 (Maximum Value) 870.3 Preoperational Value 200.0 ANO personnel have noted no definable increasing trends associated with the tritium levels at the discharge location. Levels detected during 2005 and previous operational years have been well below regulatory reporting limits. Therefore, the operation of ANO had no definable impact on this waterborne pathway during 2005 and levels of radionuclides remain similar to those obtained in previous operational years.

Drinking water samples were collected from two locations (indicator and control).

Although ANO personnel utilize Station 14 (City of Russellville) as an indicator location due to the potential for the drinking water pathway to exist, the City of Russellville has not withdrawn water from Lake Dardanelle in the past several years.

Drinking water samples were analyzed for gross beta radionuclides, Iodine- 131, gamma radionuclides and tritium. Gamma radionuclides, Iodine-131 and tritium concentrations were below detectable limits at the indicator and control locations, which is consistent with preoperational and operational years. Gross beta concentrations at the indicator and control locations are similar as shown in Table 3.1. Listed below is a comparison of 2005 indicator results to preoperational and operational years. Results are reported as annual average pCi/l.

Attachment to 0CAN050603 Page 21 of 49 Radionuclide 2005 2000 - 2004 Preoperational Gross Beta 1.91 3.45 2.0 Iodine-131 <LLD <LLD <LLD Gammas <LLD <LLD <LLD Tritium <LLD <LLD 200.0 ANO personnel have noted no definable trends associated with drinking water results at the indicator location. Therefore, the operation of ANO had no definable impact on this waterborne pathway during 2005 and levels of radionuclides remain similar to those obtained in previous operational years.

2.4 Sediment Sample Results Sediment samples were collected from two locations in 2005 and analyzed for gamma radionuclides. As in previous years, Cesium-137 attributable to ANO was detected in the discharge sediment indicator location (Station 8) where previously monitored liquid radioactive effluent from the plant is periodically discharged in accordance with the regulatory criteria established in the ODCM.. Although it is anticipated that radionuclides would be detected at this location since sediment particles provide a natural binding mechanism, ANO personnel have noted no definable consistent trends associated with this radionuclide at the discharge location. Cesium-137 results for 2005 were within the range of previous operational levels as seen below. Results are reported as annual average pCi/kg.

Monitoring Period Concentration 2000 - 2004 (Minimum Value) 200.3 2005 Value 666.8 2000 - 2004 (Maximum Value) 1170.0 Since reporting levels for radionuclides in sediment have not been established, an evaluation of potential dose to the public from this media was performed as shown in Attachment 2. The annual maximum dose from Cesium-137 to the skin and total body was calculated to be

<0.01 millirem.

Design objectives given in IOCFR50, Appendix I for liquid effluents are annual doses of *3 millirem total body and *10 millirem any organ. The values of <0.01 millirem for the skin and total body are well within the design objective criteria. Therefore, the level of Cesium-137 detected in 2005 had no significant impact on the environment or public by this waterborne pathway.

Attachment to OCAN050603 Page 22 of 49 2.5 Milk Sample Results Milk samples were not collected during 2005 due to the unavailability of indicator locations within 8-km of ANO. Since there are no dairies within five miles of the ANO site, it is concluded ANO's operation had no impact on this pathway in 2005.

2.6 Fish Sample Results Fish samples were collected from two locations and analyzed for gamma radionuclides. In 2005, gamma radionuclides were below detectable limits which is consistent with the preoperational monitoring period and operational results since 1997. Therefore, based on these measurements, ANO operations had no significant radiological impact upon the environment or public by this ingestion pathway.

2.7 Food Product Sample Results The REMP has detected radionuclides prior to 1990 that are attributable to other sources.

These include the radioactive plume release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986 and atmospheric weapons testing.

In 2005, food product samples were collected when available from two locations and analyzed for Iodine-1 31 and gamma radionuclides. The 2005 levels remained undetectable, as has been the case in previous years. Therefore, based on these measurements, ANO operations had no significant radiological impact upon the environment or public by this ingestion pathway.

2.8 Land Use Census Results Minor adjustments were made to three of the nearest residence mileage distances as compared to the 2003 census. However, the land use census did not identify any new locations during the September 2005 survey that yielded a calculated dose or dose commitment greater than those currently calculated. (see Table 2.1)

Also, the land use census identified no milk-producing animals within a five-mile radius of the plant site. ANO personnel chose not to perform a garden census in 2005, which is allowed by ANO Units 1 and 2 ODCM Section 2.6.2, in lieu of broadleaf vegetation sampling in the meteorological sector (Sector 13) with the highest "D/Q".

Attachment to OCAN050603 Page 23 of 49 2.9 Interlaboratory Comparison Results RBS' Environmental Laboratory analyzed interlaboratory comparison samples for ANO to fulfill the requirements of ANO Units 1 and 2 ODCM Section 2.6.3. Attachment 1, 2005 Radiological Environmental Monitoring Report, contains these results. ANO's review of RBS' interlaboratory comparison indicated that 98% of the sample results for accuracy and precision were within the acceptable control limits of the three normalized deviations. For the one sample result (Mn-54 in sediment) outside the acceptable control limits, ANO's and RBS's review indicated no impact on previously reported data. Attachment 1 provides additional discussion regarding the sample result outside the acceptable control limits.

Attachment to OCAN050603 Page 24 of 49 TABLE 2.1 2005 Land Use Census Nearest Residence Within Five Miles Direction Sector Distance (miles)

N 1 0.9 NNE 2 1.3 NE 3 0.9 ENE 4 0.8 E 5 0.8 ESE 6 0.8 SE 7 0.8 SSE 8 0.8 S 9 0.8 SSW 10 0.7 SW'* 11 2.8 WSW 12 0.7 W* 13 0.8 WNW 14 0.8 NW 15 1.0 NNW 16 0.9

  • Minor adjustments to residence mileage distance made as compared to 2003.

Attachment to 0CAN050603 Page 25 of 49 FIGURE 2-1 TLD RADIATION DOSE 2000 - 2005 TLD Readings 15 12 0

1999-2004 Control Location Maximum ( 3 Stdev) 0 o 0 9

0 o o 0 0 0 0°S X

  • o o * * *
  • 0 0 0 *
  • 0 5 X X X X A z X Az zX 6 *. . .~~~~~~~...

°A . .. ..... .............

A.

-I--X X* X*t *.

X .- *.t A *A-

-AA

-- A 0

X A 0 A A A A A A A x

3 1999-2004 Control Location Minim um (-3 Stdev) l

  • Qtr 1, 2005 0 Qtr 2, 2005 & Qtr 3, 2005 X Qtr 4, 2005 0

'- (4 le to r, SK 8 a. ° * ,T.

VI .

1N Po V 4 4W 1w 8 G FA 2

Attachment to OCAN050603 Page 26 of 49 3.0 Radiological Environmental Monitoring Program Summary 3.1 2005 Program Results Summary Table 3.1 summarizes the 2005 REMP results. ANO personnel did not use values reported as less than the lower limit of detection (<LLD) when determining ranges and means for indicator and control locations.

Attachment to OCAN050603 Page 27 of 49 TABLE 3.1 Radiolopical Environmental Monitoring Program Summarv Name of Facility: ANO - Units 1 and 2 Docket No: 50-313 and 50-368 Location of Facility: Pone County, Arkansas Reporting Period: January - December 2005 Sample Type Type & Number LLD b Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) C Mean (F) c Nonroutine

[ Range I _ Range I Results e Mean (F) c Location d I Range I Air Particulates GB 130 0.01 0.026 (78 /78) Station 56 0.029 (26 /26) 0.025 (52/52) 0 (pCi/Y 3 10.014-0.064] (273°, 0.4 nil) [0.017 - 0.064] [0.016 - 0.043]

Airborne Iodine 1-131 130 0.07 <LLD N/A N/A <LLD 0 (pCi/m3)

Inner Ring TLDs Gamma 64 (_ 6.9 (64/64) Station 151 8.2 (4/4) N/A 0 (mR/Qtr) [ 3.9 -11.2] (210°, 0.4 mi) [ 7.5 - 9.3 ]

Special lnterest TLDs Gamma 28 (f 5.9 (28 / 28) Station 127 7.5 (4 /4) N/A 0

( mR/Qtr ) [ 2.9 - 8.3] (97, 5.2i) [ 7.0- 8.3]

Control TLD Gamma 4 (f N/A N/A N/A 5.7 (4 /4) 0 (mRtQtr) [4.3 -7.4]

Attachment to OCAN050603 Page 28 of 49 TABLE 3.1 Radioloeical Environmental Monitoring Program Summary Name of Facility: ANO - Units 1 and 2 Docket No: 50-313 and 50-368 Location of Facility: Pope County. Arkansas Reporting Period: January - December 2005 Sample Type Type & Number LLD b Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine l Range _ I Range I Results e Mean (F) c Location d l Range I Surface Water H-3 8 3000 876.3 (3 /4) Station 8 876.3 (3 /4) <LLD 0 (pCi/I) [666.0-1121.0] (180°, 0.1nii) [ 666.0- 1121.0]

GS 24 Mn-54 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 1-131 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba-140 60 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0

Attachment to OCAN050603 Page 29 of 49 TABLE 3.1 Radlolotvical Environmental Monitorine Proaram Summar Name of Facility: ANO - Units 1 and 2 Docket No: 50-313 and 50-368 Location of Facility: Pone County. Arkansas Reporting Period: January - December 2005 Sample Type Type & Number LLD b Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean ( F) c Nonroutine (Range _ [ Range I Results e Mean (F) C Location d [ Range I Drinking Water GB 8 4 1.91(3 /4) Station 14 1.91 (3 /4) 1.70 (3 /4) 0 (pCi/1) [1.13 -2.341 (70°, 5.3 mi) [1.13 -2.34] [1.62-1.77]

1-131 8 1.0 <LLD N/A N/A <LLD 0 H-3 8 2000 <LLD N/A N/A <LLD 0 GS 8 Mn-54 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0

- Co-58 15 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba-140 60 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0 Bottom GS 2 Sediment Cs-134 150 <LLD N/A N/A <LLD 0 (pCi/kg) Cs-137 180 666.8 (1/1) Station 8 666.8 (1/1) <LLD 0

[N/A] (245°,0.7nmi) [N/A]

Attachment to OCAN050603 Page 30 of 49 TABLE 3.1 Radiological Environmental Monitorine Proeram Summary Name of Facility: ANO - Units 1 and 2 Docket No: 50-313 and 50-368 Location of Facility: Pone County. Arkansas Reporting Period: January - December 2005 Sample Type Type & Number LLD b Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine IRangel _ Range l Results e Mean (F) c Fish GS 2 Location d I Range l (pCi/kg) Mn-54 130 <LLD N/A N/A <LLD 0 Fe-59 260 <LLD N/A N/A <LLD 0 Co-58 130 <LLD N/A N/A <LLD 0 CO60 130 <LLD N/A N/A <LLD 0 Zn-65 260 <LLD N/A N/A <LLD 0 Cs-134 130 <LLD N/A N/A <LLD 0 Cs-137 150 <LLD N/A N/A <LLD 0 Food Products I-131 6 60 <LLD N/A N/A N/A 0 (pCi/kg)

GS 6 Cs-134 60 <LLD N/A N/A N/A 0 Cs-137 80 <LLD N/A N/A N/A 0 a GB = Gross beta; 1-131 = Iodine-131; H-3 = Tritium; GS = Gamma scan.

b LLD = Required lower limit of detection based on ANO Units 1 and 2 ODCM Tables 2.6-2.

c Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis (F).

d Locations are specified (1) by name and (2) degrees relative to reactor site.

e Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

f LLD is not defined in ANO Units 1 and 2 ODCM Tables 2.6-2.

Attachment to OCAN050603 Page 31 of 49 Attachment 1 2005 Radiological Monitoring Report Summary of Monitoring Results

Attachment to OCAN050603 Page 32 of 49 TABLE OF CONTENTS TABLE 1.1 AIR PARTICULATE 34 TABLE 1.2 RADIOIODINE CARTRIDGE 35 TABLE 2.1 THERMOLUMINESCENT DOSIMETERS 36 TABLE 2.2 THERMOLUMINESCENT DOSIMETERS 37 TABLE 3.1 SURFACE WATER (GAMMA ISOTOPIC) 38 TABLE 3.2 SURFACE WATER (TRITIUM) 40 TABLE 4.1 DRINKING WATER (GROSS BETA 1-131 AND GAMMA ISOTOPIC) 41 TABLE 4.2 DRINKING WATER (TRITIUM) 42 TABLE 5.1 SEDIMENT 43 TABLE 6.1 FISH 44 TABLE 7.1 FOOD PRODUCTS 45 TABLE 8.1 INTERLABORATORY COMPARISON 46

Attachment to OCAN050603 Page 33 of 49 Table 1.1 Sample Type: Air Particulate Analysis: Gross Beta Units: pCi/M3 Start Date End Date Station 1 Station 2 Station 56 Station 6 Station 7 (Indicator) (Indicator) (Indicator) (Control) (Control)

Required LLD 4 0.01 0.01 0.01 0.01 0.01 12/28/2004 01/11/2005 0.019 0.019 0.020 0.019 0.020 01/11/2005 01/25/2005 0.035 0.029 0.038 0.032 0.031 01/25/2005 02/08/2005 0.023 0.022 0.024 0.022 0.024 02/08/2005 02/22/2005 0.029 0.026 0.030 0.027 0.028 02/22/2005 03/08/2005 0.026 0.026 0.030 0.026 0.027 03/08/2005 03/22/2005 0.016 0.017 0.018 0.016 0.018 03/22/2005 04/05/2005 0.015 0.014 0.017 0.016 0.016 04/05/2005 04/19/2005 0.016 0.017 0.018 0.016 0.016 04/19/2005 05/03/2005 0.017 0.016 0.018 0.018 0.017 05/03/2005 05/17/2005 0.023 0.021 0.064 0.021 0.025 05/17/2005 05/31/2005 0.018 0.018 0.021 0.019 0.019 05/31/2005 06/14/2005 0.019 0.019 0.023 0.018 0.019 06/14/2005 06/28/2005 0.029 0.025 0.029 0.025 0.029 06/28/2005 07/12/2005 0.028 0.029 0.029 0.026 0.028 07/12/2005 07/26/2005 0.022 0.022 0.023 0.02 0.024 07/26/2005 08/09/2005 0.027 0.029 0.030 0.027 0.029 08/09/2005 08/23/2005 0.022 0.021 0.022 0.021 0.023 08/23/2005 09/07/2005 0.035 0.035 0.038 0.035 0.038 09/07/2005 09/20/2005 0.033 0.035 0.035 0.033 0.035 09/20/2005 10/04/2005 0.019 0.021 0.023 0.021 0.020 10/04/2005 10/18/2005 0.024 0.024 0.021 0.021 0.022 10/18/2005 11/01/2005 0.026 0.026 0.027 0.036 0.032 11/01/2005 11/15/2005 0.028 0.027 0.030 0.018 0.029 11/15/2005 11/29/2005 0.025 0.024 0.027 0.021 0.027 11/29/2005 12/12/2005 0.046 0.046 0.049 0.033 0.039 12/12/2005 12/22/2005 0.036 0.041 0.041 0.027 0.043

Attachment to OCAN050603 Page 34 of 49 Table 1.2 Sample Type: Radioiodine Cartridge Analysis: Iodine-131 Units: pCi/M3 Start Date End Date Station 1 Station 2 Station 56 Station 6 Station 7 (Indicator) (Indicator) (Indicator) (Control) (Control)

Required LLD 4 0.07 0.07 0.07 0.07 0.07 12/28/2004 01/11/2005 <0.017 <0.015 <0.018 <0.015 <0.017 01/11/2005 01/25/2005 <0.017 <0.015 <0.015 <0.020 <0.015 01/25/2005 02/08/2005 <0.010 <0.014 <0.009 <0.012 <0.013 02/08/2005 02/22/2005 <0.017 <0.014 <0.014 <0.013 <0.012 02/22/2005 03/08/2005 <0.012 <0.012 <0.011 <0.013 <0.013 03/08/2005 03/22/2005 <0.013 <0.014 <0.014 <0.012 <0.012 03/22/2005 04/05/2005 <0.015 <0.017 <0.018 <0.015 <0.016 04/05/2005 04/19/2005 <0.019 <0.015 <0.022 <0.015 <0.016 04/19/2005 05/03/2005 <0.018 <0.016 <0.016 <0.016 <0.021 05/03/2005 05/17/2005 <0.017 <0.014 <0.050 <0.019 <0.018 05/17/2005 05/31/2005 <0.018 <0.018 <0.023 <0.017 <0.015 05/31/2005 06/14/2005 <0.017 <0.017 <0.018 <0.018 <0.019 06/14/2005 06/28/2005 <0.013 <0.013 <0.012 <0.015 <0.014 06/28/2005 07/12/2005 <0.017 <0.018 <0.014 <0.018 <0.019 07/12/2005 07/26/2005 <0.012 <0.010 <0.011 <0.012 <0.016 07/26/2005 08/09/2005 <0.019 <0.020 <0.017 <0.018 <0.016 08/09/2005 08/23/2005 <0.012 <0.013 <0.016 <0.010 <0.010 08/23/2005 09/07/2005 <0.014 <0.019 <0.017 <0.018 <0.019 09/07/2005 09/20/2005 <0.014 <0.013 <0.014 <0.015 <0.013 09/20/2005 10/04/2005 <0.013 <0.014 <0.014 <0.013 <0.011 10/04/2005 10/18/2005 <0.021 <0.024 <0.021 <0.022 <0.018 10/18/2005 11/01/2005 <0.014 <0.016 <0.013 <0.019 <0.013 11/01/2005 11/15/2005 <0.012 <0.018 <0.017 <0.017 <0.012 11/15/2005 11/29/2005 <0.017 <0.019 <0.020 <0.021 <0.018 I 1/29/2005 12/12/2005 <0.056 <0.049 <0.046 <0.049 <0.052 12/12/2005 12/22/2005 <0.022 <0.030 <0.028 <0.024 <0.022

Attachment to OCAN050603 Page 35 of 49 Table 2.1 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mrem/Qtr Inner Ring (Indicators) 1st Qtr '05 Annual Mean '05 Station 1st Qtr '05 2nd Qtr '05 3rd Qtr '05 4th Qtr '05 (mrem) (inarem) (mrem) (mrem) (mrem) 3 4.3 6.4 3.9 4.1 4.7 145 6.4 7.4 4.9 6.1 6.2 146 6.4 8.3 4.9 6.1 6.4 147 6.4 7.4 4.9 6.1 6.2 1 6.4 11.2 7.0 7.1 7.9 148 6.4 8.3 5.9 7.1 6.9 110 7.5 8.3 5.9 7.1 7.2 149 6.4 7.4 5.9 7.1 6.7 4 6.4 8.3 5.9 6.1 6.7 150 7.5 8.3 5.9 7.1 7.2 151

  • 7.5 9.3 8.0 8.1 8.2 2 7.5 8.3 5.9 7.1 7.2 56 7.5 9.3 7.0 8.1 8.0 109 7.5 9.3 7.0 7.1 7.7 108 6.4 8.3 7.0 7.1 7.2 152 6.4 8.3 4.9 7.1 6.7
  • Station with highest annual mean.

Attachment to OCAN050603 Page 36 of 49 Table 2.2 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mrem/Qtr Special Interest Areas - (Population Centers & Schools)

Station 1st Qtr '05 2nd Qtr '05 3rd Qtr '05 4th Qtr '05 Annual Mean '05 (mrem) (mrem) (mrem) (mrem) (mrem) 6 5.3 7.4 3.9 6.1 5.7 111 3.2 5.5 3.9 5.1 4.4 116 6.4 8.3 5.9 7.1 6.9 125 3.2 4.6 2.9 4.1 3.7 127

  • 7.5 8.3 7.0 7.1 7.5 137 6.4 8.3 4.9 6.1 6.4 153 5.3 7.4 7.0 8.1 7.0
  • Station with highest annual mean.

Special Interest Areas - (Control)

Station 1st Qtr '05 2nd Qtr '05 3rd Qtr '05 4th Qtr '05 Annual Mean '05 (mrem) (mrem) (mrem) (mrem) (mrem) 7 4.3 7.4 4.9 6.1 5.7

Attachment to OCAN050603 Page 37 of 49 Table 3.1 Sample Type: Surface Water Analysis: Gamma Isotopic Units: pCi/l Location Start Date End Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-95 Nb-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD 4 15 30 15 15 30 30 15 15 15 18 60 15 Station 8 (Indicator) 12/31/2004 01/31/2005 <2.66 <6.54 <3.71 <2.70 <6.01 <5.76 <3.52 <4.98 <3.25 <3.48 <12.44 <6.39 Station 10 (Control) 12/31/2004 01/31/2005 <2.69 <6.30 <2.41 <2.60 <6.09 <4.92 <3.31 <2.80 <2.88 <2.93 <10.64 <4.32 Station 8 (Indicator) 01/31/2005 02/28/2005 <4.96 <9.95 <4.79 <4.38 <7.25 <7.32 <5.01 <6.88 <5.23 <4.40 <20.77 <7.56 Station 10 (Control) 01/31/2005 02/28/2005 <3.81 <11.99 <5.42 <4.70 <10.38 <10.27 <6.26 <5.31 <5.90 <6.59 <26.07 <5.99 Station 8 (Indicator) 02/28/2005 03/31/2005 <3.95 <8.52 <2.91 <3.77 <7.19 <7.20 <4.11 <9.17 <4.02 <2.89 <18.97 <6.84 Station 10 (Control) 02/28/2005 03/31/2005 <3.28 <7.42 <3.81 <3.79 <8.38 <6.71 <3.77 <6.89 <3.99 <4.05 <15.73 <5.99 Station 8 (Indicator) 03/31/2005 04/30/2005 <4.20 <6.76 <3.12 <3.08 <6.18 <7.16 <4.10 <5.07 <3.08 <3.20 <14.57 <5.68 Station 10 (Control) 03/31/2005 04/30/2005 <3.29 <7.17 <3.53 <3.17 <8.80 <5.96 <3.38 <4.71 <4.43 <3.27 <15.50 <5.49 Station 8 (indicator) 04/30/2005 05/31/2005 <3.30 <6.89 <4.11 <2.99 <7.08 <6.59 <4.21 <6.01 <4.12 <3.85 <20.52 <5.69 Station 10 (Control) 04/30/2005 05/31/2005 <4.23 <8.31 <3.42 <4.39 <7.87 <7.48 <4.45 <6.22 <4.35 <3.43 <20.45 <7.51 Station 8 (Indicator) 05/31/2005 06/30/2005 <2.62 <4.66 <3.92 <2.41 <6.26 <6.26 <4.21 <5.66 <3.80 <3.69 <16.86 <6.55 Station 10 (Control) 05/31/2005 06/30/2005 <3.60 <5.96 <3.25 <4.12 <7.95 <6.30 <4.34 <4.85 <4.42 <4.09 <17.90 <6.43

Attachment to OCAN050603 Page 38 of 49 Table 3.1 Sample Type: Surface Water Analysis: Gamma Isotopic Units: pCi/l Location Start Date End Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD 4 15 30 15 15 30 30 15 15 15 18 60 15 Station 8 (Indicator) 06/30/2005 07/31/2005 <5.67 <10.73 <3.50 <6.21 <9.34 <10.50 <6.42 <7.02 <6.92 <6.65 <21.12 <8.11 Station 10 (Control) 06/30/2005 07/31/2005 <5.07 <9.71 <4.09 <5.11 <9.13 <8.61 <5.42 <8.34 <5.61 <3.05 <18.27 <5.45 Station 8 (Indicator) 07/31/2005 08/31/2005 <4.48 <10.42 <4.28 <4.45 <11.14 <8.71 <3.93 <8.47 <3.24 <7.10 <20.95 <9.83 Station 10 (Control) 07/31/2005 0831n/2005 <3.70 <7.63 <4.34 <5.33 <9.05 <8.75 <5.38 <10.52 <4.59 <4.02 <28.81 <9.49 Station 8 (Indicator) 08/31/2005 09/30/2005 <2.94 <9.26 <4.21 <4.74 <7.62 <7.38 <3.87 <9.44 <4.32 <2.95 <23.80 <6.02 Station 10 (Control) 08/31/2005 09/30/2005 <2.96 <4.82 <3.36 <3.21 <7.57 <7.52 <4.17 <9.07 <3.60 <3.36 <23.12 <8.49 Station 8 (Indicator) 09/30/2005 10/31/2005 <3.09 <7.52 <4.15 <3.64 <8.46 <7.19 <3.29 <4.59 <4.19 <3.16 <15.97 <6.50 Station 10 (Control) 09/30/2005 10/31/2005 <2.99 <5.54 <2.90 <3.45 <7.68 <6.19 <3.05 <5.71 <4.16 <3.61 <14.79 <2.99 Station 8 (Indicator) 10/31/2005 11/30/2005 <3.68 <6.64 <4.39 <3.82 <8.28 <6.60 <4.83 <6.05 <4.85 <4.21 <24.32 <5.65 Station 10 (Control) 10/31/2005 11/30/2005 <4.81 <9.11 <5.04 <2.93 <9.18 <6.11 <6.32 <8.88 <4.55 <4.53 <26.60 <8.65 Station 8 (Indicator) 11/30/2005 12/31/2005 <3.92 <9.42 <2.86 <3.46 <9.38 <5.10 <4.21 <13.80 <3.73 <3.29 <31.66 <8.72 Station 1O (Control) 11/30/2005 12/31/2005 <4.77 <8.96 <4.01 <3.51 <5.24 <6.56 <5.92 >14.98 <3.76 <3.43 <26.38 <7.30

Attachment to OCAN050603 Page 39 of 49 Table 3.2 Sample Type: Surface Water Analysis: Tritium Units: pCi/l Location Begin Date End Date H-3 Required LLD 4 3000 Station 8 (Indicator) 12/31/2004 03/31/2005 <587 Station 10 (Control) 12/31/2004 03/31/2005 <576 Station 8 (Indicator) 03/31/2005 06/30/2005 666 Station 10 (Control) 03/31/2005 06/30/2005 <556 Station 8 (Indicator) 06/30/2005 09/30/2005 1121 Station 10 (Control) 06/30/2005 09/30/2005 <597 Station 8 (Indicator) 09/30/2005 12/31/2005 842 Station 10 (Control) 09/30/2005 12/31/2005 <588

Attachment to OCAN050603 Page 40 of 49 Table 4.1 Sample Type: Drinine Water Analysis: Gross Beta, Iodine-1 31 and Gamma Isotopic Units: pCi/l Location Collection Gross 1-131 Mn-54 Fe-59 Co-58 Co-60 Zn-65 Zr-95 Nb-95 Cs-134 Cs-137 Ba-140 La-140 Date Beta Required LLD 9 4.0 1.0 15 30 15 15 30 30 15 15 18 60 15 Station 14 (Indicator) 03/17/2005 1.13 <0.87 <4.87 <5.84 <5.41 <3.42 <10.62 <7.69 <4.91 <5.52 <6.73 <21.15 <6.21 Station 57 (Control) 03/17/2005 <1.69 <0.90 <5.30 <7.07 <5.20 <3.95 <7.90 <7.90 <4.12 <3.24 <4.86 <20.72 <5.71 Station 14 (Indicator) 06/14/2005 <1.68 <0.88 <3.32 <9.59 <3.86 <3.45 <9.69 <7.25 <3.57 <3.88 <4.07 <16.12 <6.80 Station 57 (Control) 06/14/2005 1.71 <0.88 <3.36 <7.05 <3.55 <3.62 <6.96 <5.06 <3.86 <3.75 <3.86 <11.44 <4.57 Station 14 (Indicator) 09/13/2005 2.25 <0.90 <2.76 <6.99 <3.30 <3.18 <8.28 <6.24 <4.21 <3.19 <3.82 <13.60 <5.86 Station 57 (Control) 09/13/2005 1.62 <0.90 <2.75 <7.52 <2.84 <2.47 <5.91 <5.09 <3.66 <3.31 <3.14 <15.88 <5.90 Station 14 (Indicator) 12/12/2005 2.34 <0.90 <4.48 <5.81 <3.90 <3.83 <10.97 <9.89 <7.51 <4.01 <4.49 <41.03 <10.09 Station 57 (Control) 12/12/2005 1.77 <0.89 <4.68 <8.74 <4.63 <4.23 <7.07 <6.83 <4.15 <4.26 <3.46 <31.67 <9.53

Attachment to OCAN050603 Page 41 of 49 Table 4.2 Sample Type: Drinking Water Analysis: Tritium Units: pCi/l Location Collection Date H-3 Required LLD 4 2000 Station 14 (Indicator) 03/17/2005 <583 Station 57 (Control) 03/17/2005 <572 Station 14 (Indicator) 06/14/2005 <552 Station 57 (Control) 06/14/2005 <565 Station 14 (Indicator) 09/13/2005 <566 Station 57 (Control) 09/13/2005 <571 Station 14 (Indicator) 12/12/2005 <583 Station 57 (Control) 12/12/2005 <568

Attachment to OCAN050603 Page 42 of 49 Table 5.1 Sample Type: Sediment Analysis: Gamma Isotopic Units: pCi/kg Location Collection Date Cs-134 Cs-137 Reguired LLD 4 150 180 Station 8 (Indicator) 10/12/2005 <115.34 666.8 Station 16 (Control) 10/14/2005 <107.73 <84.99

Attachment to OCAN050603 Page 43 of 49 Table 6.1 Sample Type: Fish Analysis: Gamma Isotopic Units: pCi/kg Location Collection Date Mn-54 Fe-59 Co-58 Co-60 Zn-65 Cs-134 Cs-137 Required LLD 4 130 260 130 130 260 130 150 Station 8 (Indicator) 10/04/2005 <9.98 <5.60 <13.16 <15.65 <45.54 <12.42 <11.51 Station 16 (Control) 09/08/2005 <16.99 <8.72 <32.38 <14.10 <37.28 <14.86 <13.88

Attachment to OCAN050603 Page 44 of 49 Table 7.1 Sample Type: Food Products Analysis: Iodine-13 1 and Gamma Isotopic Units: pCi/kg Location Collection Date 1-131 Cs-134 Cs-137 Required LLD 4 60 60 80 Station 13 (Indicator) 06/16/2005 <53.06 <43.90 <49.59 Station 55 (Control) 06/16/2005 <58.87 <44.85 <51.88 Station 13 (Indicator) 07/18/2005 <58.35- <31.71 <38.48 Station 55 (Control) 07/21/2005 <50.45 <32.12 <39.86 Station 13 (Indicator) 08/18/2005 <32.84 <27.07 <17.28 Station 55 (Control) 08/18/2005 <52.01 <28.68 <25.33

Attachment to OCAN050603 Page 45 of 49 Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Gross Beta, Iodine-131 and Gamma Isotopic Sample Type Study Date Analysis Known RBS RBS RBS (units) Value ' Value N-Dev b N-Range' Charcoal Cartridge E4570-125 06/09/2005 1-131 91.7 96.3 0.88 0.386 (pCi/cartridge)

Water E4569-125 06/09/2005 Beta 214 232 1.48 0.055 (pCilliter) E4568-125 06/09/2005 Cr-51 330 347 0.89 0.251 Mn-54 136 140 0.55 0.217 Co-58 69.7 81.3 2.89 0.678 Fe-59 158 165.7 0.84 0.262 Co-60 169 191 2.25 0.384 Zn-65 93.8 100 1.08 0.378 1-131 104 95.7 -1.39 0.170 Cs-134 206 213 0.56 0.086 Cs-137 101 107 1.09 0.117 Ce-141 214 232 1.48 0.055 E4719-125 09/15/2005 H-3 4190 4337 0.61 0.152 Milk E4571-125 06/09/2005 Cr-51 303 254 -2.82 1.111 (pCi/liter) Mn-54 125 126.0 0.18 0.614 Fe-59 63.9 74.7 2.92 0.647 Co-60 145 132.0 -1.51 0.407 Zn-65 155.0 158.0 0.37 0.495 1-131 86.9 83.3 -0.71 0.068 Cs-134 95.0 89.0 -1.09 0.373 Cs-137 189 184 -0.49 0.281 Ce-141 92.4 95.7 0.61 0.447

Attachment to OCAN050603 Page 46 of 49 Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Tritium and Gamma Isotopic Sample Type Study Date Analysis Known RBS RBS RBS (units) Value N-Dev b N-Range' Air Filter E4717-125 09/15/2005 Beta 95.8 94.2 -0.29 0.253 (pCi/Filter) E4720-125 09/15/2005 Cr-51 237 209 -2.05 0.548 Mn-54 64.5 65.3 0.21 0.449 Co-58 44.4 43.1 -0.51 0.931 Fe-59 42.7 44.7 0.81 0.332 Co-60 117 112 -0.79 0.454 Zn-65 86.6 89.6 0.60 0.498 Cs-134 85.7 80.2 -1.12 0.193 Cs-137 137 135 -0.29 0.302 Ce-141 164 153 -1.16 0.576 Sediment E4718-125 09/15/2005 Cr-51 0.455 0.467 0.47 0.091 (pCi/gram) Mn-54 0.124 0.155 4 .2 8 d 0.191 Co-58 0.085 0.093 1.63 0.347 Fe-59 0.082 0.090 1.76 1.008 Co-60 0.225 0.246 1.59 0.158 Zn-65 0.166 0.187 2.19 0.676 Cs-134 0.164 0.183 1.97 0.396 Cs-137 0.364 0.418 2.55 0.097 Ce-141 0.314 0.355 2.24 0.150 NOTES:

(a) The "known" value as determined by Analytics.

(b) The normalized deviation from the "known" value is computed from the deviation and the standard error of the mean; +2.00 is the warning limit and +/-3.00 is the control limit. This is a measure of accuracy of the analytical methods.

(c) The normalized range is computed from the mean range, the control limit and the standard error of the range; +2.00 is the warning limit and +3.00 is the control limit.

This is a measure of precision of the analytical methods.

(d) The results reported were outside the acceptable control limits.

Attachment to OCAN050603 Page 47 of 49 Interlaboratory Comparison Program Exceptions There was one result associated with a gamma isotopic analysis of a sediment sample that was outside the control limits for accuracy in the 2005 Interlaboratory Comparison program participation studies.

The result outside the control limits for accuracy was in the analysis of the nuclide Mn-54 in Analytics sample number E4718-125 of September 15, 2005. River Bend Station's normalized-deviation for the analysis was +4.28 with control limits of +/-3.00. This high bias result is considered conservative and as having no impact on past results of the program. Mn-54 results were all within control limits in other program samples for the year 2005, with normalized-deviation of 0.55 in a water sample analysis, 0.21 in an air filter sample analysis, and 0.18 in a milk sample analysis.

Review of trending information of Mn-54 results in sediment samples indicates a steady high bias, with only one result for Mn-54 out of the control limits in 1998. Reanalysis of the 2005 sediment sample produced results very similar to the original averaged result.

Analytics was contacted concerning the high Mn-54 bias result. The explanation received was that the effect of coincidence summing where the 834 keV gamma efficiency (of Mn-

54) is lower due to coincidence summing of the 898 and 1836 keV gammas from Y-88 would give a lower efficiency and therefore a higher value for Mn-54.

Attachment to OCAN050603 Page 48 of 49 ATTACHMENT 2 Sediment Dose Calculations

Attachment to OCAN050603 Page 49 of 49 Sediment Dose Calculations Dose calculation for the discharge sediment was performed using generalized equation found in Regulatory Guide 1.109, Appendix A as follows:

R= (40) x (C) x (U) x (D) x (W)

R= Annual dose to skin or total body in mrem/year; 40 Area-mass conversion factor given in Appendix A of Regulatory Guide 1.109 in Kg/m 2; C= 2005 maximum radionuclide concentration in pCi/kg; U= Maximum exposure time given in Table E-5 of Regulatory Guide 1.109 (67 hours7.75463e-4 days <br />0.0186 hours <br />1.107804e-4 weeks <br />2.54935e-5 months <br /> for teenager);

D= External dose conversion factor for standing on contaminated ground given in Table E-6 of Regulatory Guide 1.109 in mrem/hr per pCi/m 2 , and W Shore-width factor (0.1) given in Table A-2 of Regulatory Guide 1.109.

(Dose from Sediment in MiiliremlYear)

Radionuclide 2005 Maximum Conversion Factor Total Conversion Factor Total Concentration For Skin Skin Dose For Total Body Body Dose Cs-137 J 666.8 4.90 E-09 8.76 E-04 4.20 E-097.51 E-04 TOTAL 8.76 F04 7C51 1

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