W3F1-2008-0033, Annual Radiological Environmental Operating Report for the Period of January 1 Through December 31, 2007

Annual Radiological Environmental Operating Report for the Period of January 1 Through December 31, 2007

ML081220547
Person / Time
Site:	Waterford
Issue date:	04/28/2008
From:	Murillo R Entergy Nuclear South, Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
W3F1-2008-0033
Download: ML081220547 (63)

Text

Entergy Nuclear South Entergy Operations, Inc.

17265 River Road Killona, LA 70057-3093 Tel 504 739 6715 Fax 504 739 6698 SEntergy rmurill@entergy.com Robert J. Murillo Licensing Manager Waterford 3 W3F1-2008-0033 April 28, 2008 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

Annual Radiological Environmental Operating Report -2007 Waterford Steam Electric Station, Unit 3 (Waterford 3)

Docket No. 50-382 License No. NPF-38

Dear Sir or Madam:

Attached is the Annual Radiological Environmental Operating Report for the period of January 1 through December 31, 2007. This report is submitted pursuant to the requirements of Waterford 3 Technical Specification Section 6.9.1.7.

Please contact me at (504) 739-6715 if you have questions regarding this information.

There are no new commitments contained in this submittal.

Sincerel RJM/GCS Attachment(s) Annual Radiological Environmental Operating Report - 2007

W3F1-2008-0033 Page 2 cc: Mr. Elmo E. Collins, Jr.

Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Waterford Steam Electric Station Unit 3 P.O. Box 822 Killona, LA 70066-0751 U. S. Nuclear Regulatory Commission Attn: Mr. N. Kalyanam Mail Stop O-07D1 Washington, DC 20555-0001 Wise, Carter, Child & Caraway ATTN: J. Smith P.O. Box 651 Jackson, MS 39205 Winston & Strawn ATTN: N.S. Reynolds 1700 K Street, NW Washington, DC 20006-3817 Morgan, Lewis & Bockius LLP ATTN: T.C. Poindexter 1111 Pennsylvania Avenue, NW Washington, DC 20004

Attachment I W3FI-2008-0033 Annual Radiological Environmental Operating Report.- 2007

JEntergy I January 1, 2007 - December 31, 2007I

=3' bfuMwff Oftxm W=3M Th~Ll

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Originator: 03-171Dae C Ann V. Dubois, Chemistry Technician Date Reviewed By:

r rejean, JrrS.HP/Che try Specialist Date avdM. Rieder, C( ality Assurance Date J rsg,o emis uperistnt Date Date Approved By:

Jo0h n Aornsby, Chemi &Superintendent'

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE OF CONTENTS

1.0 INTRODUCTION

5 1.1 Radiological Environmental Monitoring Program 5 1.2 Pathways Monitored 5 1.3 Land Use Census 5 2.0 INTERPRETATION AND TRENDS OF RESULTS 20 2.1 Air Particulate and Radioiodine Sample Results 20 2.2 Thermoluminescent Dosimetry Sample Results 20 2.3 Water Sample Results 21 2.4 Sediment Sample Results 21 2.5 Milk Sample Results 22 2.6 Fish Sample Results 22 2.7 Broadleaf Vegetation Sample Results 22 2.8 Land Use Census Results 22 2.9 Interlaboratory Comparison Results 22 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

25 3.1 2007 Program Results Summary 25

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station LIST OF TABLES TABLE 1.1 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM 6 TABLE 2.1 BIENNIAL LAND USE CENSUS RESULTS, 23 TABLE 3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

26

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station LIST OF FIGURES FIGURE 1-1 REMP SAMPLES WITHIN 2 MILES OF WATERFORD 3 17 FIGURE 1-2 REMP SAMPLES WITHIN 10 MILES OF WATERFORD 3 18 FIGURE 1-3 REMP SAMPLES WITHIN 50 MILES OF WATERFORD 3 19 FIGURE 2-1 TLD RADIATION DOSE COMPARISON (BY YEAR) 24

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station LIST OF ATTACHMENTS ATTACHMENT I 2007 RADIOLOGICAL MONITORING REPORT

SUMMARY

OF MONITORING RESULTS 30 ATTACHMENT 2 STATISTICAL COMPARISONS 47

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Annual Radiological 2007 Environmental, Operating Report Waterford 3 Steam Electric Station Summary The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for Waterford 3's (W3) Radiological Environmental Monitoring Program (REMP) for the period January 1 through December 31, 2007. This report fulfills the requirements of W3 Technical Specification 6.9.1.7.

During 2007, gross beta radioactivity was detected in air and drinking/surface water locations. Results obtained at the indicator locations were similar to those obtained at the control location. Therefore, levels continue to remain at background.

Radiological Environmental Monitoring Program W3 established the REMP prior to the station becoming operational (1985) to provide data on background radiation and radioactivity normally present in the area. W3 has continued to monitor the environment by sampling air, water, sediment, milk, fish and broadleaf vegetation, as well as measuring radiation directly.

The REMP includes sampling indicator and control locations within a 38-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. W3 compares indicator results with control, preoperational, and previous years operational results to assess any impact W3 might have on the surrounding environment In 2007, W3 collected environmental samples for radiological analysis. Based on the comparison results of indicator locations with control locations and previous studies, it was concluded that overall W3 operations had no significant impact on plant environs. The review of 2007 data, in many cases, showed undetectable radiation levels in the environment and near background levels in significant

'pathways associated with W3.

Harmful Effects or Irreversible Damage The REMP did not detect any harmful effects or evidence of irreversible damage in 2007. Therefore, no analysis or planned course of action to alleviate problems was necessary.

I

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Reporting Levels W3's review indicates that no 'samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in Technical Requirements Manual (TRM)

Table 3.12-2 when averaged over any calendar quarter, due to W3 effluents. Therefore, 2007 results did not trigger any radiological monitoring program special reports.

Radioactivity Not Attributable to W3 The W3 REMP detected radioactivity attributable to other sources twice. These include the 25th Chinese nuclear test explosion in 1980, and the radioactivity plume release due to reactor core degradation at the Chemobyl Nuclear Power Plant in 1986.

Comparison to State Program W3 compared REMP data to the monitoring program of the Environmental Radiological Laboratory -

Department of Environmental Quality Laboratory Services Division (ERL-DEQLSD). The ERL-DEQLSD and the W3 REMP entail similar radiological environmental monitoring program requirements. Both programs have obtained similar results over previous years.

Sample Deviations

• Milk Samples Milk samples were unavailable from indicator location MKE-3 for the 15, 2 nd and 4t quarters of

.2007 due to cows not producing enough milk. With the absence of milk samples at this location, broadleaf vegetation sampling was performed as required by TRM Table 3.12-1.

• Air Samples The air sample locations listed below failed to meet the requirement for sample continuity. As described in footnote (1) of TRM Table 3.12-1, deviations are permitted from the required sampling schedule due to malfunction of sampling equipment and other legitimate reasons.

Location Sample period Explanation of Deviation APQ-1 01/15/07 - 01/29/07 Sampler loss power APQ-1 01/29/07 - 02112/07 Sampler loss power APP-1 02/12/07 - 02/27/07 Sampler loss power APQ-1 04/23/07 - 05/07/07 Sampler loss power APC-1 06/04/07 - 06/18/07 Sample pump trip 2

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station

• Missed Samples TLDs located at stations B-i, G-8, J-15 and P-1 were missing at the time of the second quarter exchange. TLDs located at station P-1 were missing at the time of the third quarter exchange.

TLDs located at stations N-i, Q-5 and R-6 were missing at the time of the fourth quarter exchange.

• Required Lower Limit of Detection (LLD) Values All LLDs during this reporting period were within the acceptable limits required by the W3 TRM.

Unavailable Results W3 received analytical results in adequate time for inclusion in this report., In addition, W3's review identified no missing results.

• Program Modifications No program modifications were made during 2007.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Attachments contains results of air, TLD, water, sediment, milk, fish and broadleaf vegetation collected in 2007. TLDs were analyzed by Areva NP - Dosimetry Services. All remaining samples were analyzed by the River Bend (RBS) Environmental Laboratory. Attachment I also contains River Bend's participation in the interlaboratory comparison program during 2007. contains statistical comparisons of:

• TLD measurements from stations grouped by distance

• TLD radiation dose to historical data by location

• Gross beta activity measurements on air particulate filters

• Gross beta activity measurements in surface/drinking water samples 4

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 1.0 Introduction 1.1 Radiological Environmental Monitoring Program W3 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 abuildup 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 W3.

• Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

1.2 Pathways Monitored The airborne, direct radiation, waterbome and ingestion pathways are monitored as required by W3 TRM Table 3.12-1. A description of the W3 REMP utilized to monitor the exposure pathways is described in Table 1.1 and shown in Figures 1-1, 1-2 and 1-3.

Section 2.0 of this report provides a discussion of 2007 sampling results with Section 3.0 providing a summary of results for the monitored exposure pathways.

1.3 Land Use Census W3 conducts a land use census biennially, as required by Section 3.12.2 of the TRM. The purpose of this census is to identify changes in uses of land within five miles of W3 that would require modifications to the REMP and the Offsite Dose Calculation Manual (ODCM). The most important criteria during this census are to determine the location in each sector of the nearest:

1) Residence

2) Animal milked for human consumption 2 2

3) ,Garden of greater than 50 m (500 ft ) producing broadleaf vegetation.

W3 conducts the land use census by:

• Field surveys in each meteorological sector out to five miles in order to confirm:

> Nearest permanent residence

. Nearest garden and approximate size

> Nearest beef cow

> Nearest food product

> Nearest milking animal

• Identifying locations on maps, measuring distances to W3 and recording results on data sheets.

• Comparing current census results to previous results.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 Airborne Radioiodine and Particulates Three samples from close to the three APQ-1 (NW, 0.81 Miles) - (West bank) Continuous sampler operation Radioiodine Canister - 1-131 SITE BOUNDARY locations, in different Located in soybean/sugarcane field off sectors, in or near sectors having the LA 18 east of LA 18/3141 intersection.

highest calculated annual average weekly, or more frequently if ground level D/Q. APF-1 (ESE, 0.35 Miles) - (West bank) required by dust loading. Particulate Sampler - Gross Located on north side of Secondary beta radioactivity analysis Meteorological Tower. following filter change. Gamma isotopic analysis of composite APC-1 (NE, 0.67 Miles) - (East bank) isotopi anliocpt Located inside Little Gypsy Cooling Water (by location)quarterly.

Intake Structure fence.

Radioiodine and Particulates One sample from the vicinity of a APP-1 (WNW, 0.84 Miles) - (West bank) community having the highest Located in soybean/sugarcane field on calculated annual average ground level Short St. in Killona.

D/Q.

Radioiodine and Particulates One sample from a control location, as APE-30 (E, 25.2 Miles) - (West bank) for example 15 -30 km distant and in Located on roof of Entergy Office building the least prevalent wind direction. on Delaronde St. in Algiers. (Control) 6

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 An inner ring of stations, one in each A-2 (N, 1.27 Miles) - (East bank) Located Quarterly Gamma dose quarterly.

meteorological sector in the general on pole on LA 628 at Zephrin L. Perriloux area of the SITE BOUNDARY. Fire House.

B-I (NNE, 0.75 Miles) - (East bank)

Located on fence west of Little Gypsy.

C-1 (NE, 0.67 Miles)- (East bank) Located on fence at Little Gypsy Cooling Water Intake structure.

D-2 (ENE, 1.24 Miles) - (East bank)

Located on pole on levee at west entrance to Bonnet Carre Spillway.

"7

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 An inner ring of stations, one in each E-1 (E, 0.41 Miles) - (West bank) Located on Quarterly Gamma dose quarterly.

meteorological sector in the general pole on LA 18 east of Waterford 3 plant area of the SITE BOUNDARY. entrance.

F-2 (ESE, 1.15 Miles) - (West bank) Located on fence on LA 3142 south of LA 18..

G-2 (SE, 1.26 Miles) - (West bank) Located on fence on LA 3142 north of railroad overpass.

H-2 (SSE, 1.54 Miles) - (West bank) Located on fence on LA 3142 north of LA 3127/3142 intersection.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 An inner ring of stations, one in each J-2 (S, 1.38 Miles) - (West bank) Located on Quarterly Gamma dose quarterly.

meteorological sector in the general fence south of LA 3127 west of LA 3127/3142 area of the SITE BOUNDARY. intersection.

K-1 (SSW, 1.06 Miles) - (West bank) Located on stop sign at entrance to Entergy Education Center on LA 3127.

L-1 (SW, 1.06 Miles) - (West bank) Located on gate on LA 3127 west of LA 3127/3142 intersection.

M-1 (WSW, 0.76 Miles) - (West bank)

Located on south gate of Waterford 1 and 2.

N-1 (W, 0.98 Miles) - (West bank) Located on pole at corner of Railroad Avenue and School House Road.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electnc Station 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 An inner ring of stations, one in each P-1 (WNW, 0.84 Miles) - (West bank) Located Quarterly Gamma dose quarterly.

meteorological sector in the general on fence enclosing air sample station APP-i.

area of the SITE BOUNDARY.

Q-1 (NW, 0.81 Miles) - (West bank) Located on fence enclosing air sample station APQ-1.

R-1 (NNW, 0.51 Miles) - (West bank) Located at Waterford 1 and 2 Cooling Water Intake Structure.

TLDs An outer ring of stations, 1 in 10 of the A-5 (N, 4.59 Miles) - (East bank) Located on meteorological sectors in the 6 to 8 km pole at intersection of Oswald Avenue and US range from the site. 61.

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Annual Radiological 2007 Environmental Operating Report Waterford-3 Steam Electric Station 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 An outer ring of stations, 1 in 10 of the B-4 (NNE, 3.75 Miles) - (East bank) Located Quarterly Gamma dose quarterly.

meteorological sectors in the 6 to 8 km on pole near weigh station on US 61.

range from the site.

D-5 (ENE, 4.09 Miles) - (East bank) Located on gate on shell road north of US61/LA48 intersection.

F-4 (ESE, 3.53 Miles) - (West bank) Located on pole behind house at 646 Aquarius St. in Hahnville.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 An outer ring of stations, 1 in 10 of the E-5 (E, 4.08 Miles) - (East bank) Located on Quarterly Gamma dose quarterly.

meteorological sectors in the 6 to 8 km fence on Wesco Street off LA 48.

range from the site.

G-4 (SE, 3.30 Miles) - (West bank) Located on pole on LA 3160 north of railroad track.

H-8 (SSE, 8.13 Miles) - (West bank) Located on pole in front of Hahnville High School.

P-6 (WNW, 5.58 Miles) - (West bank) Located on fence at LA 640/railroad track intersection.

Q-5 (NW, 5.01 Miles) - (West bank) Located on pole on LA 18 across from Mississippi River marker 137.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 An outer ring of stations; 1 in 10 of the R-6 (NNW, 5.52 Miles) - (East bank) Located on Quarterly Gamma dose quarterly.

meteorological sectors in the 6 to 8 km fence on LA 3223 near railroad crossing.

range from the site.

TLDs The balance of the stations to be in F-9 (ESE, 8.18 Miles) - (East bank) Located on special interest areas such as fence north of railroad tracks on Jonathan Str'eet.

population centers, nearby residences, schools, and in 1 or 2 areas to serve G-8 (SE, 7.74 Miles) - (West bank) Located on as control stations. back fence of Luling Entergy Office.

E-15 (E, 11.7 Miles) - (East bank) Located on fence on Alliance Avenue.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 The balance of the stations to be in J-15 (S, 11.7 Miles) - (West bank) Located on pole Quarterly Gamma dose quarterly.

special interest areas such as near LA 631/Hwy 90 intersection in Des Allemands.

population centers, nearby residences, schools, and in 1 or 2 areas to serve E-30 (E, 25.2 Miles) - (West bank) Located at as control stations. entrance to Entergy office on Delaronde St. in Algiers.

(Control)

Waterborne Surface Water One sample upstream SWP-7 (WNW, 7.37 Miles)- (West bank) Located at Composite sample over Gamma isotopic analysis St. John Parish Waterworks in Edgard. (Control) one quarter period, quarterly. Composite for SWF-2 (ESE, 1.51 Miles) - (West bank) Located at tritium analysis quarterly.

One sample downstream Dow Chemical Plant drinking water canal.

SWE-5 (E, 4.59 Miles) -,(East bank) Located at St.

Charles Parish Waterworks in New Sarpy.

SWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of the plant.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.1 Rad~inlnniral Environmental Samnlina Pro)ram Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Waterborne Drinking Water One sample upstream DWP-7 (WNW, 7.37 Miles) - (West bank) Located Composite sample over one 1-131 analysis on each at St. John Parish Waterworks in Edgard. (Control) month period when 1-131 composite when the dose DWF-2 (ESE, 1.51 Miles) - (West bank) Located at analysis is performed, quarterly calculated for the consumption of One sample downstream Dow Chemical Plant drinking water canal. composite otherwise. the water is greater than one DWE-5 (E, 4.59 Miles) - (East bank) Located at St. mrem per year. Composite for Charles Parish Waterworks in New Sarpy. gross beta and gamma isotopic analyses quarterly. Composite for tritium analysis quarterly.

Sediment from Shoreline One sample upstream SHWQ-6 (NW, 5.99 Miles) - (East bank) Located Annually Gamma isotopic analysis on LA 628 east of Reserve ferry landing. (Control) annually.

SHWE-3 (E, 2.99 Miles) - (West bank) Located at One sarnI5le downstream Foot Ferry landing on LA 18.

SHWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of plant.

Ingestion Milk Samples from milking animals in the MKE-3 (E, 2.35 Miles) - (West bank) Located at the Quarterly Gamma isotopic and 1-131 three locations within 5 km distance Zeringue's house on LA 18 in Taft.

having the highest dose potential. If analysis quarterly.

there are none, then, one sample from milking animals in each of the three areas between 5 to 8 km distant where doses are calculated tobe greater than 1 mrem per year.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 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 Milk One sample from milking animals at a MKR-38 (NNW, 38.0 Miles) - (East bank) Located at Quarterly Gamma isotopic and 1-131 control location 15 - 30 km distant and 30300 Cleveland Road, Albany. La. (Control) analysis quarterly.

in the least prevalent wind direction.

Fish and Invertebrates One sample of each commercially and FH-2 (Distance/Direction Not Applicable) - Sample in season, or Gamma isotopic analysis recreational important species in vicinity Downstream of the plant discharge structure. annually if they are not of plant discharge area. seasonal FH-3 (DistancelDirection Not Applicable)-

(Westbank) Waterways downstream of plant

-discharge directed to 40 Arpent Canal.

One sample of same species in area FH-1 (DistancelDirectlon Not Applicable) -

not influenced by plant discharge. Upstream of the plant intake structure. (Control)

Broadleaf Samples of one to three different kinds BLQ-1 (NW, 0.83 Miles) - (West bank) Located near Quarterly Gamma isotopic. and 1-131 of broadleaf vegetation grown nearest air sample station APQ-1. analysis.

each of two different off-site locations of highest predicted annual average BLB-1 (NNE, 0.81 Miles) - (East bank) Located west groundlevel D/Q if milk sampling is not of Little Gypsy on LA 628.

performed.

One sample of each of the similar BLE-20 (E, 19.7 Miles) - (West bank) Located on broadleaf vegetation grown 15 - 30 km property of Nine Mile Point in Westwego. (Control) distant in the least prevalent wind direction if milk sampling is not performed.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station FIGURE 1-1 17

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station FIGURE 1-2 18

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station FIGURE 1-3 REMP Samples Within 10 to 50 Miles of Waterford-3 Ct Edst Baton Rouge>

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10 0 19

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 2.0 Interpretation and Trends of Results 2.1 Air Particulate and Radiolodine Sample Results Samples of airborne particulate and radioiodine were collected at four indicator locations and one control location and analyzed for gross beta radionuclides, Iodine-131 and gamma radionuclides (quarterly air particulate filter composites only). W3 did not detect any gamma radionuclides in the quarterly air particulate composites or Iodine-131 in the radioiodine cartridges during the reporting period, as has been the case in previous years. Indicator gross beta air particulate results for 2007 were similar to those background levels obtained, in previous years of the operational REMP and well below preoperational levels as seen below.

3 Results are reported as annual average pCi/mi Monitoring Period Result Preoperational 0.080 1983- 2006 0. 019 2007 0.021 Table 3.1, which includes gross beta concentrations for 2007, provides a comparison of the indicator and control means further emphasizes that the airborne pathway continues to remain at background levels. In addition, as shown in Attachment 2, the standard 't" test was used to compare average gross beta activity from each indicator station to the average gross beta activity at the control station. The results from this test show the average activity detected at all indicator stations is statistically the same as the average activity detected at the control station. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

2.2 Thermoluminescent Dosimetry Sample Results The average exposure rates during 2007 are consistent with those from the preoperational program and the previous five years of operation as seen in Figure 2-1. In particular, the preoperational survey indicates that exposure rates ranged between 11 and 33 mrem/standard quarter with an average of 20 mrem/standard quarter. The range during the previous five years of operation was 8 to 14 mrem/standard quarter with an average exposure rate of 11 mrem/standard quarter.

A comparison of the indicator results to the control results, as seen in Table 3.1, shows that the average indicator is slightly higher than that of the control. As shown in Attachment 1, Table 2.1, several indicator locations are higher than the control by a few mrem with a maximum difference of six mrem at one location (H-2).

As shown in Attachment 2, Table 2.1, the standard "t' test was used to compare average exposure rates for TLD stations located in groups 0-2 miles and 2-5 miles from the plant to those > 5 miles. The results indicate that the average exposure rates 0-2 miles and 2-5 miles from the plant are statistically the same as those > 5 miles.

The differences between indicator locations and the control, and TLD stations grouped by distance from the plant are expected due to a variety of factors not related to W3 plant operations that can affect background radiation in the vicinity of each TLD station. Direct radiation measurements at each TLD station have remained statistically the same in 2007 as previous years of operation as evidenced on Attachment 2, Table 2.2. In addition, Radiological Gaseous Effluents for 2007 were only a small fraction of the limits as is typical in previous years of operation and are not expected to have any impact on environmental TLD measurements.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 2.3 Water Sample Results Analytical results for 2007 drinking/surface water samples were similar to those reported in previous years.

Drinking/Surface Water Drinking Water samples also serve as surface water samples for W3. Therefore, monthly and quarterly gamma spectroscopy and tritium analyses of drinking water also satisfy the surface water sampling requirement.

Composite drinking/surface water samples were collected from two indicator and one control location and analyzed for Iodine-131, gamma radionuclides and tritium. Results indicate that all measurements were below the calculated LLDs.

Although gross beta was detected in the drinking/surface water samples, results for the indicator locations were below previous operational and preoperational years as seen below.

Results are reported as annual average pCi/l.

Monitoring Period Result Preoperational 7.0 1983- 2006 4.8 2007 2.8 Table 3.1, which includes gross beta concentrations for 2007, provides a comparison of the indicator and control means shows that the waterborne pathway continues to remain at background levels. In addition, as shown in Attachment 2, the standard 't' test was used to compare average gross beta activity from indicator stations to the average gross beta activity from the control station. The results from the test show the average activity detected at all indicator stations is statistically the same as the average activity detected at the control station. Therefore, W3 concluded that plant' operations had no significant impact on this pathway during 2007.

Surface Water Surface water samples were collected from one indicator location and analyzed for gamma radionuclides and tritium. Results indicate that all measurements were below the calculated LLDs. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

2.4 Sediment Sample Results Sediment samples were collected from two indicator locations and one control location and analyzed for gamma radionuclides. Results indicate that all measurements were below the calculated LLDs. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station 2.5 Milk Sample Results Milk samples were collected from one indicator and one control location and analyzed for Iodine-131 and gamma radionuclides. Results indicate that all measurements were below the calculated LLDs. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

2.6 Fish Sample Results Fish samples were collected from two indicators and one control location and analyzed for gamma radionuclides. Results indicate that all measurements were below the calculated LLDs. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

2.7 Broadleaf Vegetation Sample Results Broadleaf vegetation samples were collected from two indicators and one control location and analyzed for Iodine-131 and gamma radionuclides. Results indicate that all measurements were below the calculated LLDs. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2007.

2.8 Land Use Census Results In compliance with the Waterford 3 ODCM and TRM, the land use census was conducted on October 17, 18 and 19, 2006. The nearest residence, garden, beef cow, food product and milk animal in each sector within a five. mile radius of the plant was located by visual inspection and verbal inquiry.

While residence, milk cow and food product locations remained unchanged for 2006, one location of beef cows (sector A) and one garden location (sector C) were removed. One new garden location (sector C), one new goat location (sector A), and one new beef cow location (sector G) were identified in 2006. Based upon the locations identified in this survey, the locations identified in previous surveys and the locations currently being used to calculate dose commitments from liquid and gaseous effluents released from W3, no REMP sampling location changes are necessary. Results of the 2006 biennial census are shown in Table 2.1.

2.9 Interlaboratory Comparison Results The River Bend Station Environmental Laboratory analyzed interlaboratory comparison samples for W3 to fulfill the requirements of Section 5.7.2 of the ODCM, Attachment I contains these results.

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Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 2.1 Biennial Land Use Census Results A Indicates that nothing was found in the Sector within a five mile radius of Waterford 3 Animals were located at this distance from Waterford 3, but the milk is not currently used for human consumption

• • Samples are being obtained from animals at this location (MKE-3) for REMP 23

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station FIGURE 2-1 TLD RADIATION DOSE COMPARISON (BY YEAR)

TLD Radiation Dose Comparison By Year

- Control S 40 * ... ..

• Indicator I 40 w 35"- .i"s Upper Range - 35 CY 30 -- 30..*-a- . . . "30 Lower Range 3

( 25 -25 20 20 15 ,1 S 10 10 EY5 a) 5 m/ ch a) m a)- a) -

a)0a a) a) It ) a) a) a) a) 5~ 5~ 5~ 5 5 25 5 5 U 0N0N)0N0 0N0 0N0)N000 000 YEAR 24

Annual Radiological 2007 Environmental Operatinq Report Waterford 3 Steam Electric Station 3.0 Radiological Environmental Monitoring Program Summary 3.1 2007 Program Results Summary Table 3.1 summarizes the 2007 REMP results. W3 did not use values reported as less than the lower limit of detection (< LLD) when determining ranges and means for indicator and control locations.

25

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Waterford 3 SES Docket No: 50-382 Location of Facility: St. Charles, Louisiana Reporting Period: January - December 2007 Sample Type Type & Number LLD b Indicator Locations Location with Highest Annual Control Number of (Units) Of Analyses a Mean ( F ) c Mean Locations Nonroutine

[Range] Mean (F) c Results e

[ Range]

Mean ( F ) c Location d [ Rangee I Airborne Particulates GB 135 0.01 0.021 ( 107 / 108) APP-1 0.022 ( 27 / 27 ) 0.022 ( 27 / 27 0 (pCi/m 3

) [0.003 - 0.033] (WNW, 0.84 mi.) [0.014 - 0.033] [0.015 - 0.033]

GS 20 Cs-1 34 0.05 <LLD N/A N/A <LLD 0 Cs-137 0.06 <LLD N/A N/A <LLD 0 Airborne Iodine 1-131 135 0.07 <LLD N/A N/A <LLD 0 3

(pCi/m )

Indicator TLDs Gamma 120 (f) 13(112/120) F-4 15(4/4) N/A 0 (mrem/Std. Qtr) [7.5 - 16.3] (ESE, 3.50 mi.) [14.4 - 15.4.]

Control TLDs Gamma 4 (f) N/A N/A N/A 11 (4/4) 0 (mrem/Std. Qtr) [10.0 - 11.1]

26

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Waterford 3 SES Docket No: 50-382 Location of Facility: St. Charles, Louisiana Reporting Period: January - December 2007 27

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Waterford 3 SES Docket No: 50-382 Location of Facility: St. Charles, Louisiana Reporting Period: January - December 2007 Sample Type Type & LLD b Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) Number Mean (F) c Mean ( F ) c Nonroutine of Analyses a [Range] [Range] Results e Mean( F ) C Location d [Range ]

Surface Water H-3 4 3000 <LLD N/A N/A N/A 0 (pCi/Il)

GS 13 Mn-54 15 <LLD N/A N/A N/A 0 Fe-59 30 <LLD N/A N/A N/A 0 Co-58 15 <LLD N/A N/A N/A 0 Co-60 15 <LLD N/A N/A. N/A 0 Zn-65 30 <LLD N/A N/A N/A 0 Zr-95 15 <LLD N/A N/A N/A 0

- Nb-95 15 <LLD N/A N/A N/A 0 Cs-134 15 <LLD N/A N/A N/A 0 Cs-137 18 <LLD N/A N/A N/A 0 Ba-140 15 <LLD N/A N/A N/A 0 La-140 15 <LLD N/A N/A N/A 0

\

Shoreline GS 3 Sediment Cs-1 34 150 <LLD N/A N/A <LLD 0 (pCi/kg dry) Cs-1 37 180 <LLD N/A N/A <LLD 0 28

Annual Radiologjcal 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Waterford 3 SES Docket No: 50-382 Location of Facility: St. Charles, Louisiana Reporting Period: January - December 2007 Sample Type Type & Number LLD b Indicator Location with Highest Annual Mean Control Number of (Units) of Analyses a Location Locations Nonroutine Mean (F) c Mean ( F) c Results e

[Range] [Range]

Mean (F ) C Location d [Range ]

Milk 1-131 9 1< LLD 'N/A N/A <LLD 0 (pCi/I)

GS 9 Cs-134 15 < LLD N/A N/A <LLD 0 Cs-137 18 < LLD N/A N/A <LLD 0 Ba-140 15 < LLD N/A N/A <LLD 0 La-1 40 15 < LLD N/A N/A <LLD 0 Fish GS 13 (pCi/kg wet) Mn-54 130 <LLD N/A N/A <LLD 0 Fe-59 260 <LLD N/A <LLD 0 Co-58 130 <LLD N/A N/A <LLD 0 Co-60 130 <LLD N/A N/A. <LLD 0 Zn-65 260 <LLD N/A N/A <LLD 0 Cs-1 34 130 <LLD N/A N/A <LLD 0 Cs-1 37 150 <LLD N/A N/A <LLD 0 N/A Broadleaf Vegetation 1-131 .12 60 <LLD N/A N/A <LLD 0 (pCi/kg wet )

GS 12 Cs-1 34 60 <LLD N/A N/A <LLD 0

___ Cs-1 37 80 <LLD N/A N/A <LLD 0 a GB = Gross beta; 1-131 = Iodine-131; H-3 = Tritium; GS= Gamma scan.

b LLD = required lower limit of detection based on Waterford 3 TRM.

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.

LLD is not defined in Waterford 3 TRM.

29

Annual Radiological 2007 Environmental Operatinq Report Waterford 3 Steam Electric Station Attachment 1 2007 Radiological Monitoring Report Summary of Monitoring Results 30

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station TABLE OF CONTENTS TABLE 1.1 AIR PARTICULATE FILTER 32 TABLE 1.2 RADIOIODINE CARTRIDGE 33 TABLE 1.3 AIR PARTICULATE FILTER 34 TABLE 2.1 THERMOLUMINESCENT DOSIMETERS 35 TABLE 3.1 DRINKINGISURFACE WATER 36 TABLE 3.2 DRINKING/SURFACE WATER 37 TABLE 3.3 DRINKINGISURFACE WATER 38 TABLE 3.4 DRINKING/SURFACE WATER 39 TABLE 3.5 SURFACE WATER 40 TABLE 4.1 SEDIMENT 41 TABLE 5.1 MILK 42 TABLE 6.1 FISH 43 TABLE 7.1 BROADLEAF VEGETATION 44 TABLE 8.1 INTERLABORATORY COMPARISON 45 31

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.1 Sample Type: Air Particulate Filter Analysis: Gross Beta 3

Units: pCi/m End Date APF-1 APQ APP-1 APC-1 APE-30 (Indicator) (Indicator) (Indicator) (Indicator) (Control)

Required LLD 0.01 0.01 0.01 0.01 0.01 01-03-07 0.024 0.024 0.025 0.024 0.027 01-15-07 0.015 0.016 0.014 0.015 0.015 01-29-07 0.029 0.028 0.029 0.027 0.029 02-12-07 0.029 0.027 0.028 0.027 0.032 02-27-07 0.021 0.024 0.028 0.025 0.024 03-12-07 0.023 0.023 0.026 0.023 0.022 03-26-07 0.017 0.017 0.018 0.017 0.017 04-09-07 0.023 0.020 0.014 0.021 0.021 04-23-07 0.022 0.021 0.021 0.020 0.023 05-07-07 0.003 0.023 0.019 0.018 0.022 05-22-07 0.022 0.023 0.024 0.024 0.025 06-04-07 0.022 0.021 0.021 0.016 0.020 06-18-07 0.024 0.022 0.022 (1) 0.028 07-02-07 0.019 0.019 0.020 0.022 0.019 07-16-07 0.014 0.014 0.014 0.016 0.017 07-30-07 0.017 0.015 0.016 0.017 0.017 08-14-07 0.022 0.020 0.023 0.023 0.023 08-27-07 0.013 0.015 0.016 0.015 0.016 09-10-07 0.017 0.015 0.017 0.016 0.020 0.020 -0.018, 0.020 0.020 0.019 10-08-07 0.024 0.022 0.022 0.021 0.020 10-22-07 0.021 0.019 0.020 0.019 0.020 11-05-07 0.029 0.027 0.028 0.028 0.031 11-19-07 0.033 0.031 0.033 0.030 0.033 12-03-07 0.023 0.020 0.023 0.022 0.022 12-17-07 0.024 0.022 0.022 0.023 0.024 12-31-07 0.020 0.020 0.020 0.020 0.020 (1) Low volume due to sample pump trip 32

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.2 Sample Type: Radiolodine Cartridge Analysis: Iodine-131 3

Units: pCi/m End Date APF-1 APQ-1 APP-1 APC-1 APE-30 (Indicator) (Indicator) (Indicator) (Indicator) (Control)

Required LLD . 0.07 0.07 ' 0.07 0.07 0.07 01-03-07 < 0.010 < 0.018 < 0.017 < 0.020 < 0.018 01-15-07 < 0.015 < 0.017 < 0.017 < 0.015 < 0.013 01-29-07 < 0.011 < 0.019 < 0.017 < 0.016 < 0.017 02-12-07 < 0.015 < 0.043 < 0.018 < 0.013 < 0.021 02-27-07 < 0.014 < 0.016 < 0.062 < 0.019 < 0.015 03-12-07 < 0.018 < 0.021 < 0.024 < 0.019 < 0.017 03-26-07 < 0.020 < 0.015 < 0.018 < 0.022 < 0.023 04-09-07 < 0.020 < 0.018 < 0.017 < 0.019 < 0.014 04-23-07 <0.017 < 0.027 *< 0.015 < 0.013 < 0.019 05-07-07 < 0.017 < 0.022 < 0.014 < 0.014 < 0.019 05-22-07 < 0.026 < 0.024 < 0.024 < 0.020 < 0.029 06-04-07 < 0.017 < 0.018 < 0.019 < 0.027 < 0.023 06-18-07 < 0.015 < 0.018 < 0.015 < 0.067 < 0.016 07-02-07 < 0.014 < 0.020 < 0.018 < 0.020 < 0.017 07-16-07 < 0.014 < 0.018 < 0.015 < 0.014 < 0.015 07-30-07 < 0.014 < 0.014 < 0.012 < 0.012 < 0.017 08-14-07 < 0.016 < 0.014 < 0.018 < 0.013 < 0.017 08-27-07 < 0.020 < 0.017 < 0.014 < 0.011 < 0.014 09-10-07 < 0.023 < 0.020 < 0.023 < 0.018 < 0.021 09-24-07 < 0.019 < 0.014 < 0.016 < 0.017 < 0.019 10-08-07 < 0.015 < 0.013 < 0.012 < 0.011 < 0.017 10-22-07 < 0.016 < 0.015 < 0.017 < 0.015 < 0.016 11-05-07 < 0.010 < 0.014 < 0.014 < 0.013 < 0.016 11-19-07 < 0.010 < 0.020 < 0.010 < 0.010 < 0.020 12-03-07 < 0.020 < 0.010 < 0.010 < 0.010 < 0.020 12-17-07 < 0.010 < 0.010 < 0.020 < 0.010 < 0.010 12ý-31-07 < 0.010 < 0.010 < 0.010 < 0.010 < 0.020 33

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.3 Sample Type: Air Particulate Filter Analysis: Gamma Isotopic 3

Units: pCi/m Location Quarterly Cs-1 34 Cs-1 37 Composite Required LLD - 0.05 0.06 APF-1 (Indicator) 1st < 0.003 < 0.002 APQ-1 (Indicator) 1st < 0.002 < 0.002 APP-1 (Indicator) ,1st < 0.003 < 0.002 APC-1 (indicator) 1st < 0.002 < 0.002 APE-30 (Control) 1st < 0.002 < 0.001 APF-1 (Indicator) 2nd < 0.003 < 0.003 APQ-1 (Indicator) 2nd < 0.003 < 0.002 APP-1 (Indicator) 2nd < 0.004 < 0.002 APC-1 (Indicator) 2nd < 0.004 < 0.004 APE-30 (Control) 2nd < 0.003 < 0.003 APF-1 (Indicator) 3rd < 0.003 < 0.002 APQ-1 (Indicator) 3rd < 0.002 < 0.003 APP-1 (Indicator) 3rd < 0.003 <.0.002 APC-1 (Indicator) 3rd < 0.002 < 0.002 APE-30 (Control) 3rd < 0.003 < 0.002 APF-1 (Indicator) 4th < 0.002 < 0.001 APQ-1 (Indicator) 4th < 0.001 < 0.001 APP-1 (Indicator) 4th < 0.002 < 0.001 APC-1 (Indicator) 4th < 0.001 < 0.001 APE-30 (Control) 4th < 0.002 < 0.001.

34

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 2.1 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mrem/Std. Qtr. (

Indicator Locations Station 1st Qtr '07 2nd Qtr '07 3rd Qtr '07 4th Qtr '07 Annual Mean '07 A-2 13 13 14 14 13 A-5 13 12 13 13 13 B-1 13 (2) 13 14 13 B-4 13 13 13 14 13 C-1 10 11 10 11 11 D-2 14 13 14 15 14 D-5 12 12 12 13 12 E-1 12 11 11 12 11 E-5 -11 9 12 10 11 E-1 5 11 11 10 11 11 F-2 13 13 13 13 13 (1)F-4 15 14 15 15 15 F-9 12 12 13 13 12 G-2 13 13 14 14 14 G-4 12 *11 11 12 12 G-8 11 (2) 12 11 11 H-2 16 13 14 13 14 H-8 12 13 12 13 13 J-2 13 15 13 14 14 J-1 5 14 (2) 15 15 15 K-1 12 13 11 12 12 L-1 14 15 15 15 15 M-1 12 12 13 13 13 N-1 12 13 13 (2) 13 P-1 .9 (2) (2) 10 10 P-6 14 14 14 14 14 Q-1 13 13 13 13 13 Q-5 12 12 12 (2) 12 R-1 8 8 8 8 8 R-6 10 11 11 (2) 11 Control Location Station 1st Qtr '07 2nd Qtr '07 3rd Qtr '07 4th Qtr '07 Annual Mean '07 E-30 11 10 10 11 10 (1) Location with highest annual mean.

(2) No data - TLDs missing at time of exchange 35

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.1 Sample Type: Drinking/Surface Water Analysis: Gross Beta Units: pCi/I Quarterly DWF/SWF-2 DWE/SWE-5 DWP/SWP-7 Composite (Indicator) (Indicator) (Control)

Required LLD 4 4 4 1 stý < 2.35 < 2.31 < 2.28 2nd 4.06 3.28 3.64 3 rd 4.05 4.44 5.26 4 th 0.43 0.62 0.85 36

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.2 Sample Type: Drinking/Surface Water Analysis: Iodine-131 Units: pCi/I Collection SWK-1 DWF/SWF-2 DWE/SWE-5 DWPISWP-7 Date (Indicator) (Indicator) (Indicator) (Control)

LLD 15 1 1 1 01-23-07 < 3.98 < 0.66 <0.75 <0.83 (1)01-23-07 < 0.68 02-21-07 < 4.06 < 0.77 <0.90 <0.88 03-19-07 < 5.06 < 0.70 <0.83 <0.84 04-16-07 < 3.19 < 0.88 <0.82 <0.88 05-14-07 < 4.21 < 0.78 <0.80 <0.72 06-11-07 < 4.36 < 0.90 <0.88 <0.73 07-05-07 < 4.33 < 0.87 <0.84 <0.85 08-06-07 < 4.19 < 0.87 <0.90 <0.90 09-04-07 < 4.91 < 0.78 <0.90 <0.90 10-02-07 < 4.34 < 0.87 <0.86 <0.84 10-29-07 < 4.25 < 0.89 <0.87 <0.90 11-27-07 < 5.15 < 0.90 <0.80 <0.89 12-18-07 < 5.65 < 0.88 <0.87 <0.90 (1)Duplicate sample 37

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.3 Sample Type: Drinking/Surface Water Analysis: Gamma Isotopic Units: pCi/I Location Collection Mn-54 . Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD 1 15 15 30 15 30 15 15 15 18 15 15 DWF/SWF-2 (Indicator) 03-19-07 < 3.79 < 3.05 < 9.66 < 4.15 < 7.46 < 6.95 < 8.33 < 4.87 < 5.53 < 14.43 < 5.58 DWE/SWE-5 (Indicator) 03-19-07 < 4.67 < 4.50 < 8.37 < 4.83 < 7.36 < 4.74 < 7.27 < 4.86 < 4.38 < 14.87 < 6.31 DWP/SWP-7 (Control) 03-19-07 < 3.44 < 3.19 < 6.76 < 3.30 < 6.77 < 4.08 < 5.73 < 3.80 < 3.48 < 12.59 < 5.20 DWF/SWF-2 (Indicator) 06-11-07 < 3.05 < 3.12 < 6.61 < 3.05 < 7.14 < 4.48 < 5.76 < 3.47 < 4.00 < 14.31 < 4.99 DWE/SWE-5 (Indicator) 06-11-07 < 3.10 < 3.11 < 7.42 < 2.55 < 5.92 < 4.17 < 6.21 < 3.60 < 3.59 < 14.98 < 5.07 DWP/SWP-7 (Control) 06-11-07 < 4.36 < 4.72 < 7.53 < 3.73 < 9.61 < 5.63 < 6.21 < 3.51 < 5.07 < 14.83 < 6.45 DWF/SWF-2 (Indicator) 09-05-06 < 2.91 < 2.58 < 5.23 < 2.25 < 6.00 < 3.44 < 5.02 < 2.75 < 2.80 < 14.46 < 4.85 DWE/SWE-5 (Indicator) 09-05-06 < 2.78 < 2.88 < 6.30 < 2.77 < 6.09 < 2.81 < 4.07 < 2.77 < 2.64 < 14.94 < 4.06 DWP/SWP-7 (Control) 09-04-07 < 2.28 < 2.59 < 5.20 < 2.00 < 5.20 < 3.08 < 3.72 < 2.61 < 2.53 < 12.84 < 4.73 DWF/SWF-2 (Indicator) 12-18-07 < 2.83 < 2.96 < 5.16 < 2.58 < 4.54 < 3.34 < 5.41 < 2.84 < 2.84 < 13.17 < 4.42 DWE/SWE-5 (Indicator) 12-18-07 < 2.11 < 2.30 < 5.59 < 2.21 < 5.04 < 3.01 < 5.13 < 2.38 < 2.50 <.14.78 < 5.13 DWP/SWP-7 (Control) 12-18-07 < 2.66 < 2.66 < 5.72 <2.64 < 5.82 < 3.24 < 5.11 < 3.04 < 2.93 < 13.00 < 4.84 38

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.4 Sample Type: Drinking/Surface Water Analysis: Tritium Units: pCi/I Quarter DWF/SWF-2 DWE/SWE-5 SWK-1 DWP/SWP-7 (indicator) (Indicator) (Indicator) (Control)

Required LLD -- I 2000 2000 3000 2000 ISt < 536.29 < 561.33 < 564.68 < 546.08 2 nd < 521.21 < 523.60 < 547.00 < 521.43' 3 rd < 553.19 < 549.22 <551.00 < 524.01 t < 577.35 < 579.60 < 585.10 < 581.16 39

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.5 Sample Type: Surface Water Analysis: Gamma Isotopic Units: pCi/I Location Collection Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD

• 15 15 30 15 30 15 15 15 18 15 15 SWK-1 01-23-07 < 2.95 < 3.46 < 5.79 < 3.59 < 7.65 < 3.98 < 5.46 < 3.53 < 2.96 < 14.84 < 4.54 (Indicator) 02-21-07 < 4.35 < 3.58 < 6.60 < 3.77 < 8.36 < 3.68 < 5.80 < 3.08 < 3.41 < 14.58 < 5.99 03-19-07 < 5.17 < 5.24 < 10.32 < 4.67 < 10.24 < 6.24 < 8.20 < 5.83 < 4.88 < 14.65 < 6.52 04-16-07 < 2.51 < 2.35 < 5.12 < 2.33 < 5.26 < 3.19 < 4.36 < 2.74 < 2.62 < 10.96 < 3.29 05-14-07 < 3.04 < 3.00 < 5.57 < 3.68 < 6.72 < 3.86 < 5.71 < 3.36 < 3.40 < 13.77 < 4.72 06-11-07 < 2.90 <2.92 < 5.95 < 3.01 < 7.65 < 3.80 < 6.31 < 3.38 < 3.24 < 13.80 < 4.73 07-05-07 < 4.10 < 3.85 < 6.77 < 3.48 < 9.19 < 4.51 < 6.22 < 3.64 < 3.94 < 14.99 < 5.74 08-06-07 < 3.67 < 2.90 < 6.57 < 2.59 < 5.84 < 3.39 < 5.94 < 3.41 < 3.17 < 14.28 < 3.97 09-04-07 < 3.06 < 3.21 < 5.97 < 2.71 < 6.14 < 3.10 < 5.21 < 3.48 < 3.45 < 13.62 < 5.53 10-02-07 < 3.30 < 3.39 < 7.80 < 3.22 < 8.31 < 4.25 < 5.81 < 3.89 < 3.84 < 12.88 < 5.34 10-29-07 < 2.99 < 3:32 < 7.42 < 4.53 < 8.07 < 4.36 < 5:44 < 4.16 < 3.64 < 13.85 < 5.62 11-27-07 < 3.43 < 2.68 < 8.24 < 3.44 < 6.75 < 4.25 < 5.91 < 3.46 < 3.01 < 14.83 < 6.09 12-18-07 < 4.35 < 4.40 < 6.59 < 4.91 < 7.93 < 5.97 < 8.18 < 4.41 < 4.33 < 14.75 < 6.99 40

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 4.1 Sample Type: Sediment Analysis: Gamma Isotopic Units: pCi/kg (dry),

Location Collection Mn-54 Co-58 Co-60 Cs-134 Cs-1 37 Date Required LLD - n/a n/a n/a 150 180 SHWK-1 (indicator) 06-04-07 < 24.0 < 25.0 < 32.5 < 26.4 < 39.0 SHWE-3 (Indicator) 06-04-07 < 42.1 < 30.9 < 39.7 < 37.4 < 44.4 SHWQ-6 (Control) 06-04-07 < 31.3 < 26.9 < 23.9 < 24.0 < 23.8 41

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 5.1 Sample Type: Milk Analysis: Iodine-131 and Gamma Isotopic Units: pCi/I Location Collection 1-131 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD I 15 18 15 1-5 MKE-3 (Indicator) (1) 03-20-07 n/a n/a n/a n/a n/a (1) 06-19-07. n/a n/a n/a n/a n/a 07-05-07 < 0.89 <4.18 < 4.63 < 13.64 < 4.75 (1) 09-19-07 n/a n/a n/a n/a n/a (1) 12-19-07 n/a n/a n/a n/a *n/a MKR-38 (Control) 03-20-07 < 0.90 < 4.04 < 4.65 < 14.93 < 3.97 06-19-07 < 0.77 < 4.75 < 4.77 < 14.03 < 3.70 09-19-07 < 0.84 < 4.20 < 5.70 < 14.77 < 4.74.

12-19-07 < 0.84 < 4.76 < 5.15 < 14.98 < 4.73 Sample not available. Cows not producing enough milk.

42

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 6.1 Sample Type: Fish Analysis: Gamma Isotopic Units: pCi/kg (wet)

Location Collection Species Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Date Required LLD - 130 130 260 130 260 130 150 FH-1 (Control) 10-23-07 Buffalo < 14.83 < 15.76 < 45.83 < 16.95 < 34.82 < 13.35 < 10.44 FH-1 (Control) 10-23-07 Carp < 18.26 < 15.22 < 55.64 < 15.08 < 38.80 < 12.77 < 12.56 FH-1 (Control) 10-23-07 Catfish < 17.28 < 30.61 < 53.91 < 22.14 <69.43 < 22.18 < 26.35 FH-I (Control) 10-23-07 Mullet < 22.66 < 14.93 <64.83 < 20.73 < 56.77 < 17.65 < 10.07 FH-1 (Control) 10-23-07 Bass < 13.90 < 21.30 .< 46.60 < 17.70 < 38.70 < 16.60 < 16.40 FHr2 (Indicator) 11-08-07 Buffalo < 14.61 < 15.92 < 44.49 < 19.52 < 40.47 < 13.84 < 14.96 FH-2 (Indicator) 11-08-07 . Carp < 16.84 < 26.53 < 43.21 < 21.11 < 61.31 < 17.63 < 18.90 FH-2 (Indicator) 11-08-07 Catfish < 22.10 < 21.81 < 50.45 < 21.85 < 54.99 < 22.87 < 19.63 FH-2 (Indicator) 11-08-07 Mullet < 20.37 < 17.09 < 48.39 < 24.54 < 49.39 < 22.24 < 21.55 FH-3 (Indicator) 10-24-07 Buffalo < 14.12 < 12.30 < 48.54 < 13.74 < 32.98 < 9.48 < 11.59 FH-3 (Indicator) 10-24-07 Carp < 15.92 < 16.02 < 47.55 < 15.69 < 43.58 < 10.34 < 13.73 FH-3 (Indicator) 10-24-07 Catfish < 10.20 < 9.53 < 48.79 < 13.80 < 35.36 < 10.36 < 12.19 FH-3 (Indicator) 10-24-07 Mullet < 11.69 <.13.92 < 53.06 < 18.54 < 35.07 < 14.89 < 13.88 43

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 7.1 Sample Type: Broadleaf Vegetation Analysis: Iodine-131 and Gamma Isotopic Units: pCi/kg (wet)

Location Collection 1-131 Cs-134 Cs-I 37 Date Required LLD - 60 60 80 BLQ-1 (Indicator) 03-06-07 < 54.74 < 34.73 < 26.14 BLQ-1 (Indicator) 06-12-07 < 57.69 < 55.63 < 60.95 BLQ-1 (Indicator) 09-18-07 < 56.20 < 54.90 < 34.90 BLQ-1 (Indicator) 12-10-07 < 49.92 < 35.53 < 36.40 BLB-1 (Indicator) 03-06-07 < 54.35 < 32.09 < 33.93 BLB-1 (Indicator) 06-12-07 < 50.95 < 45.26 < 44.76 BLB-1 (Indicator) 09-18-07 < 54.70 < 59.40 < 59.10 BLB-1 (Indicator) 12-10-07 < 55.63 < 48.32 < 57.04 BLE-20 (Control) 03-06-07 < 50.69 < 31.33 < 29.18 BLE-20 (Control) 06-12-07 < 59.86 < 53.58 < 41.36 BLE-20 (Control) 09-18-07 < 53.50 < 52.60 < 41.60 BLE-20 (Control) 12-10-07 < 51.89 < 45.16 < 46.48 44

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratory Comparison Analysis: Gross Beta, Iodine-131, Tritium and Gamma Isotopic Sample Type Analytics # Date Analysis Known RBS Value RBS N- RBS N-(units) Value(a) DEV(b) RANGE(C) 1-131Cartridge. E5390-125 6/14/2007 1-131 7.91E+01 7.97E+01 0.13 0.01 Gross Beta Water E5389-125 6/14/2007 BETA 1.99E+02 2.25E+02 1.49 0.06 Gamma Water E5388-125 6/14/2007 Cr-51 4.11E+02 4.20E+02 0.75 0.20 (pCi/liter) Mn-54 1.33E+02 1.48E+02 3.897- 0.04 Co-'58 1.59E+02 1.64E+02 1.01 0.06 Fe-59 1.34E+02 1.45E+02 2.83 0.16 Co-60 1.91 E+02 1.95E+02 0.75 0.09 Zn-65 2.68E+02 2.82E+02 0.87 0.13

,J-1311 1.02E+02 1.02E+02 -0.02 0.16 Cs-134 1.94E+02 1.93E+02 -0.11 0.24 Cs-137 1.35E+02 1.40E+02 1.21 0.32 Ce-141 1.60E+02 1.63E+02 0.57 0.38 Tritium Water E5467-125 9/13/2007 H-3 1.20E+04 1.11E+04 -1.26 0.06 Gross Beta Filter E5468-125 9/13/2007 BETA 3.23E+01 2.81 E+01 -1.46 0.03 Gamma Filter E5469-125 9/13/07 Cr-51 1.25E+02 1.22E+02 -0.09 0.03 (pCi/fiter) Mn-54 7.26E+01 7.82E+01 1.93 0.14 Co-58 4.94E+01 4.87E+01 -0.23 0.19 Fe-59 4.79E+01 5.17E+01 1.33 0.04 Co-60 6.41 E+01 6.48E+01 0.26 0.03 Zn-65 8.76E+01 9.96E+01 2.38 0.09 Cs-134 6.38E+01 6.12E+01 -0.89 0.08 Cs-137 5.65E+01 5.85E+01 0.69 0.11 Ce-141 9.14E+01 9.12E+01 -0.06 0.12 Gamma Soil E5470-125 9/13/2007 Cr-51 3.91 E-01 3.83E-01 -0.07 0.03 (pCi/gram) Mn -54 2.27E-01 2.43E-01 0.24 0.01 Co-58 1.54E-01 1.38E-01 -0.36 0.04 Fe-59 1.49E-01 1.48E-01 -0.03 0.02 Co-60 2.OOE-01 1.94E-01 -0.11 0.01 Zn-65 2.73E-01 3.OOE-01 1.74 0.09 Cs-134 1.99E-01 2.03E-01 0.07 0.02 Cs-137 2.73E-01 2.99E-01 0.33 0.02 Ce-141 2.85E-01 2.81 E-01 -0.05 0.03 45

t Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratory Comparison Analysis: Gross Beta, Iodine-131, Tritium and Gamma Isotopic Sample Type Analytics # Date Analysis Known RBS Value RBS N- RBS N-(units) Value(al DEV'b) RANGE")

Gamma Milk E5391-125 6/12/2007 Cr41 5.12E+02 5.17E+02 0.12 0.06 (pCi/liter) Mn-64 1.66E+02 1.82E+02 1.14 0.11 Co-58 1.98E+02 2.02E+02 0.24 0.05 Fe-69 1.67E+02 1.85E+02 1.23 0.09 Co-60 2.38E+02 2.37E+02 -0.03 0.02 Zn-5 3.34E+02 3.72E+02 1.98 0.07 1-131 7.01E+01 7.03E+01 0.05 0.20 Cs-134 2.42E+02 2.42E+02 0.02 0.07 Cs-137 1.69E+02 1.70E+02 0.06 0.03 Ce-141 2.OOE+02 2.03E+02 0.16 0.05 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; +2.000 is the warning limit and +3.000 is the control limit. This is a measure of precision of the analytical methods.

(d) Results reported were outside Control Limits.

Exceptions:

There was one result outside the control limits for accuracy in the 2007 Interlaboratory Comparison program participation studies. The RBS normalized-deviation for nuclide Mn-54 in a gamma isotopic water analysis, Analytics sample number E5388-125 of 6/14/2007, was +3.89, which is outside the control limit of +/-3.00 for accuracy. This high bias result is considered conservative and is considered as having no impact on past results of the program. The results for Mn-54 in all other program samples were within control limits for the year 2007; with normalized-deviations of 0.24 in sediment sample analysis; 1.93 in an air filter sample analysis; and 1.14 in a milk sample analysis. Reanalysis of the 2007 water sample produced results very similar to the original averaged result.

• A review concerning the high bias was performed with no obvious issues associated with the counting of the water samples. Analytics was contacted concerning this result. A possible explanation offered from Analytics was that the effect of coincidence summing in calibration sources containing Y-88 and Co-60 may cause a lower efficiency for energies associated with Mn-54. The lower efficiency will result in a higher concentration for Mn-54. This phenomenon can sometimes also be seen with energies associated with Fe-59 and Zn-65.

46

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station ATTACHMENT 2 Statistical Comparisons 47

Annual Environmental Radiological Operating Report 2007 Waterford 3 Steam Electric Station.

TABLE OF CONTENTS TABLE 2.1 STATISTICAL COMPARISON OF 2007 TLD MEASUREMENTS FROM STATIONS GROUPED BY DISTANCE 51 TABLE 2.2 STATISTICAL COMPARISON OF 2007 TLD RADIATION DOSE TO HISTORICAL DATA BY LOCATION 52 TABLE 2.3 STATISTICAL COMPARISON OF 2007 GROSS BETA ACTIVITY MEASUREMENTS ON AIR PARTICULATE FILTERS 53 TABLE 2.4 STATISTICAL COMPARISON OF 2007 GROSS BETA ACTIVITY MEASUREMENTS IN DRINKING/SURFACE WATER SAMPLES 54 48

Annual Radiological 2007 Environmental Operating Report Waterford 3 Steam Electric Station Statistical Analyses

• Calculation of the Mean and Standard Deviation The mean and standard deviation for different groups of analyses are calculated using the following equations:

Xi j=l n and

0.5 where

X = mean of sample population, S = standard deviation of sample population, n = number of samples in sample population, and A = value of the i'th sample.

49

Annual Radiological 2007 Environmental Operatinq Report Waterford 3 Steam Electric Station

• Comparing Two Sample Population Means The means of two sample populations are compared for statistical difference using the standard "t" test. The use of the test requires the assumption that the data within the populations are normally distributed and that the true standard deviations of the mean are equal for both populations. The standard "t" test tests the hypothesis that the true means of both populations are equal. The "t" value can be calculated from the equation below (obtained from the CRC Standard Mathematical Tables, 26th Edition (1981)):

X-Y r0.5 n., + n., - 2 n.,~ n.,

where:

t = calculated "t" value, X = mean of first data set, Y = mean of second data set, 77x = number of variables in first data set, Sx = standard deviation of first data set, qY = number of variables in second data set, and SY = standard deviation of second data set.

The calculated "t" value is used to test the hypothesis that the true mean of the first population (m J) is equal to the true mean of the second population (m y) assuming that the true standard deviation of both populations are equal (m = m y). The calculated "t" value is compared to a tabular "t" value such that:

a if t > t p,n then reject the hypothesis when m , > m y,

b. if t < -t p,n then reject the hlypothesis when m , < m y,

c. if t > t p/2,, then reject the hypothesis when m = m Y, where t p/2,n and t p,n are the tabular "t" values, with a preselected error (5%), confidence level (1 - p) or (1- p/2), and degrees of freedom n = nx + ny - 2. Tabular values of the "t" were obtained from the CRC Standard Mathematical Tables, 26th Edition (1981).

50

Annual Radiological 2007 InVirnnmantfl ()n-r+tinn D nnr+

V ,j ,, , AaLerluru 0 ,Leam Electric Station TABLE 2.1 STTSTICAL, COMPARISON ýOF 2007 ,TLDMESRMNS FRO

-STATIONS'GROUPED.BY DISTANCEý

- - Stations L oc td 0- tations.L oc'ated 2-5' 7S ai ns L c t d o et a

, -imMiles the'from Plant Milesfrom thePlant 5 Miles from thePlantd Mean 13. 13 12 (mRem/std.qtr.)

Standard Deviation 1.75 1.38 1.42 (mRem/std. qtr.)

Number in Sample 60 27 25 Calculated "t" Value 0.38 0.35 NA*

(comparison of stations 0-2 and 2-5 miles from the plant to stations >5 miles from the plant)

Tabular "t" Value at 1.992(a) 2.011 (a) NA*

95% Confidence(t0 .025,n)

(a) Results indicate the mean for stations located 0-2 miles and 2-5 miles from the plant are statistically identical to the mean for stations located more than 5 miles from the plant.

• Not Applicable 51

Annual Radiological 2007 Fnvirnnmpntal Cnerntinn Pannrt \Al +f-r,4~r I* Q+o Ilr-: rir Qf fitnn TABLE 2.2 STATISTICAL COMPARISON OF 2007 TLD RADIATION DOSE'TO HISTORICAL DATA BY' LOCATION Units: mrem/Std. Qtr.

Station" 1990 - 2006 Avg** 1990 - 2006 Std Dev** 1990 - 2006 Range**, 2007 Avg**. -2007 Std Dev** - 2007 Range**

A-2 13 1.5 10 18- 14 0.5 13 14 A-5 13 1.5 10 17 13 0.4 12 13 B-1 13 1.5 10 19 13 0.5 13 14 B-4 13 1.2 11 17 .13 0.4 13 14 C-1 9 1.3 7 13 11 0.5 10 11 D-2 12 2.0 8 19 14 0.7 13 15 D-5 12 1.6 9 18 12 0.4 12 13 E-1 11 1.3 9 16 12 0.5 11 12 E-5 12 1.7 9 17 11 1.1 9 12 E-15 11 .. 1.9 8 16 11 0.4 10 11 E-30* 11 1.7. 8 17 11 0.5 10 11 F-2 12 1.2 10 17 13 0.0 13 13 F-4 14 1.5 11 19 15 0.4 14 15 F-9 12 1.6 7 17 13 0.5 12 13 G-2 15 1.5 11 19 14 0.5 13 14 G-4 11 1.4 9 16 12 0.5 11 12 G-8 12 2.2 8 19 11 0.5 11 12 H-2 13 1.3 10 18 14 1.2 - 13 16 H-8 12 1.3 9 17 13 0.5 12 13 J-2 12 1.5 10 17 14 0.8 13 15 J-15 13 1.3 11 17 15 0.5 14 15 K-1 11 1.4 9 16 12 0.7 11 13 L-1 13 1.3 10 16 12 0.4 14 15 M-1 12 1.5 9 18 11 0.5 12 13 N-1 13 1.7 8 18 11 0.5 12 13 P-1 10 1.4 7 15 9 0.5 9 10 P-6 13 - .1.5 10 19 12 0.0 14 14 Q-1 12 1.2 10 16 12 0.0 13 13 Q-5 13 2.3 9 18 10 0.0 12 12 R-1 10 2.1 6 15 7 0.0 8 8 R-6 12 2.7 8 18 10 0.5 10 11

• Control Location

• • Significant outliers were removed from data sets.

PERS data indicates an average of 20 mrem for all indicator locations with a range of 11 to 33 and an average control of 18 mrem.

52

Annual Radiological 2007 Pnvirnnmantfi r)-rftinn Oannrf U LI ýj bý t Le rUd .JOeai Q 1L EIeC~LrIc OLdiUF TABLE 2.3

- ~~STATISTICAL COMPARISON OF 2007, GRS EAATTY~

MEASUREMENTS ON AIIR PARTICULATE FILTERS SAMPLE STATION APF-1 ~K APQ- APP-I! APC-1AE3 Mean 21.1 21.0 21.6 21.1 22.4 (0I 3pCi/m3 )

Standard Deviation 5.82 4.19 4.86 4.14 4.81 (10 pCi/m3 )

Number in Sample 27 27 27 26 27 Calculated "t" Value 0.92 1.21 0.65 1.08 NA*

(comparison of the indicator stations to the control station)

Tabular "t" Value at 2.009(a) 2.009(a) 2.009(a) 2.011 (a) NA*

95% Confidence(to.o25,n)

(a) Results indicate the mean for the indicator stations is statistically identical to the meanffor the control station.

• Not Applicable 53

Annual Radiological 2007 r- r; r nt'l* In flnnrotmna Dnnr+

L~i 1101LU I U -IV I k I~XOJLJI tu OLI1) J~II - . - I U 0JOl~-

TABLE 2.4 S *-' *:-. STATIST ICA, C- MPARISONOF .2007TGROSSBa ETA ACTIViTY- -'

M EASU REM ENTS: INDRI NKIN GSU RFACE, WATER SAMPILES..

-DWFISWF-ý2: DWEiS WE- DWPISWP--

Mean 2.8 2.8 3.3 (pCi/liter)

Standard Deviation 1.71 1.60 1.82 (pCi/liter)

Number in Sample 3 3 3 Calculated "t" Value 0.28 0.34 NA*

(comparison of the indicator stations to the control station)

Tabular "t" Value at 2.776(a) 2.776(a) NA*

95% Confidence(tO.0 25 ,.)

(a) Results indicate the mean for the indicator station is statistically identical to the mean for the control station.

• Not Applicable 54