Text

Annual Radiological Environmental Operating Report - 2015
	ML16132A515
Person / Time
Site:	Waterford
Issue date:	12/31/2015
From:	Benton C, Dubois A, Lawless N; Entergy Operations
To:	; Office of Nuclear Reactor Regulation
Shared Package
ML16132A513	List: ML16132A489; W3F1-2016-0037, Annual Radiological Environmental Operating Report - 2015;
References
	W3F1-2016-0037
	Download: ML16132A515 (63)
	v • d • e

En tergy I January 1, 2015-December3l, 2015 I

Annual Radiological 2015 Environmental Ooeratina ReDort Wtrford 3 Steam EIectrir Station Originator: &Ai1 f4iOs -C /

1 O4 Ann V. Dubois, Chemistry Technician Date Reviewed By: ki Clay M. Benton, Chemistry Supervisor Date Ll&ccIcy_

Approved By: #-/9- /c2 Nicole K. Lawless, Chemistry Manager Date

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station TABLE OF CONTENTS

SUMMARY

I

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 Broad Leaf 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 2015 Program Results Summary 25

Annual Radiological 2015 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

Annual Radiological 2015 Environmental Operating Report Waterlord 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 III

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station LIST OF ATTACHMENTS ATTACHMENT 1 2015 RADIOLOGICAL MONITORING REPORT

SUMMARY

OF MONITORING RESULTS 30 ATTACHMENT 2 STATISTICAL COMPARISONS 50

- iv -

Annual Radiological 2015 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 3s (W3) Radiological Environmental Monitoring Program (REMP) for the period January 1 through December 31, 2015. This report fulfills the requirements of W3 Technical Specification 6.9.1 .7.

During 2015, 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 broad leaf vegetation, as well as measuring radiation directly.

The REMP includes sampling indicator and control locations within a 31-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 2015, 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 2015 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 2015. Therefore, no analysis or planned course of action to alleviate problems was necessary.

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Reporting Levels W3s review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in Technical Requirements Manual (TRM)

Table 3.1 2-2 when averaged over any calendar quarter, due to W3 effluents. Therefore, 2015 results did not trigger any radiological monitoring program special reports.

Radioactivity Not Attributable to W3 The W3 REMP detected radioactivity attributable to other sources three times. These include the 25th Chinese nuclear test explosion in 1980, the radioactivity plume release due to reactor core degradation at the Chernobyl Nuclear Power Plant in 1986, and the airborne release from Dai-ichi, Fukushima following the Tohoku earthquake on March 11, 2011.

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 Since milk samples for indicator location MKE-3 were unavailable for all quarters of 2015, broad leaf vegetation sampling was performed as required byTRM Table 3.12-1. Broad leaf vegetation results are in section 2.7. Milk samples were collected from one control location and analyzed for Iodine-i 31 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 2015.

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-i, deviations are permitted from the required sampling schedule due to malfunction of sampling equipment and other legitimate reasons.

Location Sample Period Explanation of Deviation APP-i 02/02/i5 02/i 6/i5 Sample pump tripped APE-30 04/27/i5 05/i 1/i5 Sample pump running at low capacity 2

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Attachments contains results of air, TLD, water, sediment, milk, fish and broad leaf vegetation collected in 2015. TLDs were analyzed by Stanford Dosimetry. All remaining samples were analyzed by Teledyne Brown Engineering, Inc. Attachment 1 also contains Teledynes participation in the interlaboratory comparison program during 2015. 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 2015 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 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 W3.

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 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 2015 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

3) Garden of greater than 50 m (500 ft ) producing broad leaf 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.

5

Annual Radiological 2015 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 Radioiodine and Particulates Airborne APQ-1 (NW, 0.81 Miles) (West bank)

Three samples from close to the three Continuous sampler operation Radioiodine Canister 1-131 SITE BOUNDARY locations, in different Located in soybean/sugarcane field off with sample collection bi- analysis bi-weekly.

sectors, in or near sectors having the LA 18 east of LA 18/3141 intersection.

highest calculated annual average weekly, or more frequently if Particulate Sampler Gross ground level D/Q.

APF-1 (ESE, 0.35 Miles) (West bank) required by dust loading.

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) (by location) quarterly.

Located inside Little Gypsy Cooling Water Intake Structure fence.

Radioiodine and Particulates APP-I (WNW, 0.84 Miles) (West bank)

One sample from the vicinity of a community having the highest Located in soybean/sugarcane field on calculated annual average ground level Short St. in Killona.

D/Q.

Radioiodine and Particulates APE-30 (E, 25.2 Miles) (West bank)

One sample from a control location, as 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 2015 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 IkP A-2 (N, 1.27 Miles) (East bank) Located Quarterly Radiation An inner ring of stations, one in each 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-I (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 2015 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 Ih2 An inner ring of stations, one in each E-1 (E, 0.41 Miles) (West bank) Located on Quarterly Radiation Gamma dose quarte1y.

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.

8

Annual Radiological 2015 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 ILP J-2 (S, 1.38 Miles) (West bank) Located on Quarterly Radiation An inner ring of stations, one in each 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-I (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-I (W, 0.98 Miles) (West bank) Located on pole at corner of Railroad Avenue and School House Road.

9

Annual Radiological 2015 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 IkP An inner ring of stations, one in each P-I (WNW, 0.84 Miles) (West bank) Located Quarterly Radiation 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 A-5 (N, 4.59 Miles) (East bank) Located on An outer ring of stations, 1 in 10 of the meteorological sectors in the 6 to 8 km pole at intersection of Oswald Avenue and US ranges from the site. 61.

10

Annual Radiological 2015 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 Ik An outer ring of stations, 1 in 10 of the B-4 (NNE, 3.75 Miles) (East bank) Located Quarterly Radiation Gamma dose quarterly.

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

ranges from the site.

0-5 (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.

11

Annual Radiological 2015 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 E-5 (E, 4.08 Miles) (East bank) Located on Quarterly Radiation An outer ring of stations, 1 in 10 of the Gamma dose quarterly.

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

ranges 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.

12

Annual Radiological 2015 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 IhP An outer ring of stations, 1 in 10 of the R-6 (NNW, 5.52 Miles) (East bank) Located on Quarterly Radiation Gamma dose quarterly.

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

ranges 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 Street.

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.

13

Annual Radiological 2015 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 ILP!

The balance of the stations to be in -

J-15 (S, 11.7 Miles) (West bank) Located on pole Quarterly Radiation 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.

14

Annual Radiological 2015 Environmental Operating Report Waterlord 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 Waterborne Drinking Water DWP-7 (WNW, 7.37 Miles) (West bank) Located One sample upstream 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 mrem per year. Composite for DWE-5 (E, 4.59 Miles) (East bank) Located at St.

Charles Parish Waterworks in New Sarpy. gross beta and gamma isotopic analyses quarterly. Composite for tritium analysis quarterly.

Sediment from Shoreline SHWQ-6 (NW, 5.99 Miles) (East bank) Located One sample upstream 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 sample downstream Foot Ferry landing on LA 18.

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

Ingestion Miis 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 Zeringues 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 to be greater than 1 mrem per year.

15

Annual Radiological 2015 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 MKA-31 (N, 31.2 Miles) (East bank) Located at One sample from milking animals at a Quarterly Gamma isotopic and 1-131 control location 1530 km distant and 18736 Sisters Road, Ponchatoula, LA. (Control) analysis quarterly.

in the least prevalent wind direction.

Fish and Invertebrates -

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

(Westbank) Waterways downstream of plant discharge directed to 40 Arpent Canal.

FH-1 (Distance/Direction Not Applicable)

One sample of same species in area 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 BLB-1 (NNE, 0.81 Miles) (East bank) Located west highest predicted annual average ground level D/Q if milk sampling is not of Little Gypsy on LA 628.

performed.

BLE-20 (E, 19.7 Miles) (West bank) Located on One sample of each of the similar 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.

16

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station FIGURE 1-1 REMP Samples Within N 2 Miles of Waterford-3 A

N E

Sample Types PEMP

Airborne a Broad Leaf M

Mith

WF-3 A Sanitary System

TLD

+/- PirbomelfLD

+ Fish L

u Shoreline Sediment

Eornkrng Wafer S Surface Water J

0 0.5 1 Miles 17

10 C

- C U)

C-)

a)

LU E

a)

U)

Ct)

-D C,

r Ui D

CD U-t C

C a)

C C

C, 00) 2 5c c

00 D -

C>

CC

<LU

Annual Radiological 2015 Environmental Qoeratina Reoort Waterford 3 Steam Electric Station FIGURE 1-3 st. HeIer; . -

REMP Samples Within 10 to 50 Miles of Waterford-3 R / B Ea!t atot Rotige ..- 7-

\ .. - Tngipo. - . -

C

Q .---- fl.---

.-

MKA 31 \

./ - .-- Jt.Táozny

\ \

I 0

St.JOth95$1 .---. -

1be,vi -

- - st C: .,

- I.

N

ALtnp1a-- - BLE-20 - --

\

\ Lfouice PlqLJm1,7e

- J45 Sample Types

- -i- - -..

M F

A,,).....

J

,Iffor,c -

Taiteborn - - -- - - -- - -_

IS L .

- .. G $

-/------ -**---- -

+

10 0 10 J2OAiIes K H J

19

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station 2.0 Interpretation and Trends of Results 2.1 Air Particulate and Radioiodine Sample Results Samples of airborne particulate and radioiodine were collected at four indicator locations and one control location and analyzed for gross beta radionuclides, lodine-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-i 31 in the radioiodine cartridges during the reporting period as has been the case in previous years. Indicator gross beta air particulate results for 2015 were similar to those background levels obtained in previous years of the operational REMP and well below preoperational levels as seen below. Results are reported as annual average pCi/rn Monitoring Period Result Preoperational 0.080 19832014 0.020 2015 0.018 Table 3.1, which includes gross beta concentrations for 2015, provides a comparison of the indicator and control means. It further emphasizes that the airborne pathway continues to remain at background levels. In addition, as shown in Attachment 2, the standard Ut 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 2015.

2.2 Thermoluminescent Dosimetry Sample Results The average exposure rates during 2015 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 9 to 16 mrem/standard quarter with an average exposure rate of 12 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.

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 from the plant are statistically the same as >5 miles while those 2-5 miles are statistically higher.

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 2015 as previous years of operation as evidenced on Attachment 2, Table 2.2. In addition, Radiological Gaseous Effluents for 2015 were only a small fraction of the limits and are not expected to have any impact on environmental TLD measurements.

20

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station 2.3 Water Sample Results Analytical results for 2015 drinking/surface water samples were similar to those reported in previous years.

DrinkinglSurface 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 indicators and one control location and analyzed for Iodine-i 31, 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 preoperational years and slightly above previous operational years as seen below. Results are reported as annual average pCi/I.

Monitoring Period Result Preoperational 7.0 19832014 4.7 2015 5.7 Table 3.1, which includes gross beta concentrations for 2015, provides a comparison of the indicator and control means. It 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 one indicator station is statistically the same as the average activity detected at the control station and one indicator station is statistically higher than the mean for the control location. Results are consistent with historical data stated above. Therefore, W3 concluded that plant operations had no significant impact on this pathway during 2015.

Surface Water Surface water samples were collected from one indicator location and analyzed for gamma radionucl ides 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 2015.

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 2015.

21

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station 2.5 Milk Sample Results Since milk samples for indicator location MKE-3 were unavailable for all quarters of 2015, broad leaf vegetation sampling was performed as required byTRM Table 3.12-1. Broad leaf vegetation results are in section 2.7. Milk samples were collected from one control location and analyzed for Iodine-i 31 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 2015.

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 2015.

2.7 Broadleaf Vegetation Sample Results Broadleaf vegetation samples were collected from two indicators and one control location and analyzed for Iodine-i 31 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 2015.

2.8 Land Use Census Results In compliance with the Waterford 3 ODCM and TRM, the land use census was conducted September 22 September 24, 2014. 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.

Two new garden locations (sectors P and Q) were identified in 2014. Residence, milk cow, and goat locations remained unchanged for 2014. Beef cows located in sector E at a distance of 2.9 miles from the plant have been removed. A soybean field is located in sector N at a distance of 0.6 miles from the plant. 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 2014 biennial census are shown in Table 2.1.

2.9 Interlaboratory Comparison Results Teledyne Brown Engineering, Inc. analyzed interlaboratory comparison samples for W3 to fulfill the requirements of Section 5.7.2 of the ODCM. Attachment 1 contains these results.

22

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 2.1 Biennial Land Use Census Results Sector Direction Distance from Plant in Miles Milk Beef Food Residence Garden Cows Cows Goats Products A N 1.3 1.7 A 4.8 4.1 B NNE 1.1 1.3 A A A 1.3 C NE 0.9 1.0 A A A A 0 ENE 0.9 3.2 A A A A E E 2.2 2.2 **2.3 2.3

3.2 0.3 F ESE 3.1 2.2 A 2.3 A 0.3 G SE 4.0 4.1 A 2.4 A Q3 H SSE A A A A A 0.3 J S A A A A A 05 K SSW A A A A A 0.5 L SW A A A A A 0.5 M WSW A 1.4 A 1.2 A 0.5 N W 1.0 1.1 A 1.0 A 0.6 P WNW 0.9 0.9 A A A 0.6 Q NW 0.9 0.8 A A A 0.6 R NNW 3.0 3.0 A 49 A 2.6 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 2015 Environmental Opera Report Waterford 3 Steam Electric Station FIGURE 2-1 TLD Radiation Dose Comparison By Year 40 40 Control 35 35 lndcator a) Upper Range 30 30

Lower Range 0

-o 25 25

-o 20 20 a),

0 15 15 E

10 10 5 5 0 0 0) r YEAR 24

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station 3.0 Radiological Environmental Monitoring Program Summary 3.1 2015 Program Results Summary Table 3.1 summarizes the 2015 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 2015 Environmental Oneratina ReDort 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 2015 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 [ Range]

Airborne Particulates GB 130 0.01 0.018 ( 103/ 104) APE-i 0.019 ( 26 / 26) 0.019 ( 25/26) 0

- (ESE, 0.35 mi.) - -

)

3

( pCi/m [ 0.010 0.029 1 [0.011 0.029 1 [ 0.006 0.027 1 GS 20 Cs-i 34 0.05 <LLD N/A N/A <LLD 0 Cs-i 37 0.06 <LLD N/A N/A <LLD 0 Airborne Iodine 1-131 130 0.07 <LLD N/A N/A <LLD 0

( pCiIm)

Indicator TLDs Gamma 120 (f) 12 ( lii / 120) F-4 14 ( 4 / 4) N/A 0 8.2 14.5] (ESE, 3.53 mi.) 13.9 14.5

( mremlStd. Qtr) [ [ 1 Control TLDs Gamma 4 (f) N/A N/A N/A 10 ( 4 / 4) 0

( mremlStd. Qtr) [8.6 10.6]

26

Annual Radiological 2015 Environmental ODeratinci Reoort 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 2015 Sample Type Type & Number LLD b Indicator Location Location with Highest Annual Mean Control Number of

( Units) of Analyses a Mean ( F) c Locations Nonroutine

[ Range] Mean ( F ) C Results e

[Range]

Mean ( F ) C Locationd [Range]

Surface Water& Gross Beta 12 4 5.7(8/8) DWF/SWF-2 7.2(4/4) 4.7(4/4) 0 Drinking Water [3.88.1] (ESE, 1.51 ml.) [6.18.1] [2.75.6]

( pCill) 1-131 40 1 <LLD N/A N/A <LLD 0 H-3 12 2000 <LLD N/A N/A <LLD 0 GS 12 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 15 <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-i 40 15 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0 27

Annual Radiological 2015 Environmental Operating Report WaterIord 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 2015 Sample Type Type & LLD b Indicator Locations Location with Highest Annual Mean Control Locations Number of

( Units) Number Mean ( F ) C Mean ( F ) c Non routine 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/I)

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-i 34 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 1-131 15 <LLD N/A N/A N/A 0 Shoreline GS 3 Sediment Cs-i 34 150 <LLD N/A N/A <LLD 0

( pCi/kg dry)

Cs-137 180 <LLD N/A N/A <LLD 0 28

Annual Radiological 2015 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 201 -

Sample Type Type & Number LLD b Indicator Location Location with Highest Annual Mean Control Number of

( Units) of Analyses a Mean ( F) C Locations Nonroutine

[ Range] Mean ( F ) C Results e

[Range]

Mean ( F ) C Location d [ Range]

Milk 1-131 4 1 < LLD N/A N/A <LLD 0

( pCiII)

GS 4 Cs-i 34 15 < LLD N/A N/A <LLD 0 Cs-i 37 18 < LLD N/A N/A <LLD 0 Ba-140 15 < LLD N/A N/A <LLD La-i40 15 <LLD N/A N/A <LLD 0 0

Fish GS 13

( pCilkg wet) 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 Co-60 130 <LLD N/A N/A <LLD 0 Zn-65 260 <LLD N/A N/A <LLD 0 Cs-i 34 130 <LLD N/A N/A <LLD 0 Cs-i 37 150 <LLD N/A N/A <LLD 0 Broadleaf Vegetation 1-131 12 60 <LLD N/A N/A <LLD 0

( pCilkg wet)

GS 12 Cs-i 34 60 <LLD N/A N/A <LLD 0 Cs-i 37 80 <LLD N/A N/A <LLD 0 a GB = Gross beta; 1-131 = Iodine-i 31; 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 2015 Environmental Operating Report Waterford 3 Steam Electric Station Attachment I 2015 Radiological Monitoring Report Summary of Monitoring Results 30

Annual Radiological 2015 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 DRINKINGISURFACE WATER 37 TABLE 3.3 DRINKINGISURFACE WATER 38 TABLE 3.4 DRINKINGISURFACE 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 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.1 Sample Type: Air Particulate Filter Analysis: Gross Beta Units: pCi/m 3

End Date APE-I APQ-I APP-I APC-I APE-30 (Indicator) (Indicator) (Indicator) (Indicator) (Control)

Required LLD OMI OMI OMI OMI 0.01 01-06-15 0.0171 0.0175 0.0169 0.0201 0.0196 01-20-15 0.0229 0.0233 0.0236 0.0264 0.0251 02-02-15 0.0224 0.01 94 0.0241 0.0205 0.0258 (1) 02-16-15 0.0289 0.0237 0.0280 0.0272 03-02-15 0.0165 0.0164 0.0173 0.0197 0.0171 03-16-15 0.0113 0.0097 0.0114 0.0103 0.0107 03-30-15 0.0144 0.0117 0.0144 0.0098 0.0134 04-13-15 0.0146 0.0117 0.0151 0.0122 0.0128 04-27-15 0.0126 0.0146 0.0147 0.0124 0.0059 (2) 05-11-15 0.0184 0.0186 0.0201 0.0201 05-26-15 0.0152 0.0148 0.0136 0.0138 0.0195 06-08-15 0.0213 0.0179 0.0208 0.0195 0.0257 06-22-15 0.0189 0.0166 0.0144 0.0145 0.0213 07-07-15 0.0186 0.0166 0.0145 0.0155 0.0177 07-20-15 0.0171 0.0153 0.0146 0.0138 0.0169 08-03-15 0.0210 0.0209 0.0190 0.0184 0.0208 08-17-15 0.0201 0.0208 0.0166 0.0178 0.0188 08-31-15 0.0183 0.0149 0.0176 0.0146 0.0180 09-14-15 0.0237 0.0180 0.0156 0.0155 0.0169 09-28-15 0.0273 0.0249 0.0249 0.0243 0.0235 10-12-15 0.0189 0.0161 0.0189 0.0179 0.0176 10-26-15 0.0192 0.0217 0.0145 0.0190 0.0210 11-09-15 0.0157 0.0176 0.0148 0.0164 0.0151 11-22-15 0.0235 0.0231 0.0236 0.0198 0.0235 12-07-15 0.0217 0.0219 0.0203 0.0185 0.0211 12-21-15 0.0228 0.0203 0.0202 0.0211 0.0215 (1)

No volume due to sample pump trip (2)

Low volume due to sample pump running at low capacity 32

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.2 Sample Type: Radioiodine Cartridge Analysis: Iodine-i 31 Units: pCi/ms End Date APF-I APQ-I APP-I APC-I APE-30 (Indicator) (Indicator) (Indicator) (Indicator) (Control)

Reciuired LLD QQZ QZ Q&Z QQZ QPi 01-06-15 <0.0283 <0.0257 <0.0267 <0.0272 <0.0113 01-20-15 <0.0415 <0.0377 <0.0391 <0.0399 <0.0204 02-02-15 <0.0099 <0.0232 <0.0295 <0.0246 <0.0242 (1) 02-16-15 <0.0535 <0.0484 <0.0517 <0.0508 03-02-15 <0.0262 <0.0093 <0.0312 <0.0251 <0.0249 03-16-15 <0.0166 <0.0390 <0.0515 <0.0413 <0.0407 03-30-15 <0.0320 <0.0113 <0.0382 <0.0312 <0.0301 04-13-15 <0.0264 <0.0093 <0.0304 <0.0254 <0.0250 04-27-15 <0.0331 <0.0300 <0.0369 <0.0133 <0.0379 (2) 05-11-15 <0.0160 <0.0267 <0.0318 <0.0534 05-26-15 <0.0420 <0.0104 <0.0300 <0.0244 <0.0339 06-08-15 <0.0238 <0.0222 <0.0095 <0.0207 <0.0277 06-22-15 <0.0279 <0.0263 <0.0278 <0.0245 <0.0136 07-07-15 <0.0125 <0.0285 <0.0293 <0.0265 <0.0284 07-20-15 <0.0135 <0.0332 <0.0332 <0.0298 <0.0326 08-03-15 <0.0358 <0.0343 <0.0342 <0.0119 <0.0336 08-17-15 <0.0222 <0.0545 <0.0543 <0.0488 <0.0542 08-31-15 <0.0230 <0.0562 <0.0560 <0.0503 <0.0558 09-14-15 <0.0199 <0.0449 <0.0446 <0.0401 <0.0445 09-28-15 <0.0149 <0.0362 <0.0361 <0.0330 <0.0360 10-12-15 <0.0383 <0.0363 <0.0171 <0.0413 <0.0364 10-26-15 <0.0302 <0.0111 <0.0262 <0.0259 <0.0287 11-09-15 <0.0090 <0.0221 <0.0200 <0.0197 <0.0220 11-22-15 <0.0164 <0.0370 <0.0368 <0.0331 <0.0372 12-07-15 <0.0218 <0.0494 <0.0491 <0.0440 <0.0491 12-21-15 <0.0114 <0.0278 <0.0276 <0.0249 <0.0280 (1)

No volume due to sample pump trip (2)

Low volume due to sample pump running at low capacity 33

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 1.3 Sample Type: Air Particulate Filter Analysis: Gamma Isotopic Units: pCi/ms Location Quarterly Cs-I 34 Cs-I 37 Composite Required LLD

0.05 0.06 APE-i (Indicator) 1st < 0.003 < 0.003 APQ-i (Indicator) 1st < 0.003 < 0.003 APP-i (Indicator) 1st < 0.005 < 0.004 APC-i (Indicator) 1st < 0.004 < 0.003 APE-30 (Control) 1st < 0.004 < 0.004 APF-i (Indicator) 2nd < 0.004 < 0.004 APQ-i (Indicator) 2nd < 0.003 < 0.002 APP-i (Indicator) 2nd < 0.005 < 0.004 APC-1 (Indicator) 2nd < 0.004 < 0.003 APE-30 (Control) 2nd < 0.005 < 0.004 APE-i (Indicator) 3rd < 0.005 < 0.005 APQ-1 (Indicator) 3rd < 0.003 < 0.002 APP-i (Indicator) 3rd < 0.002 < 0.002 APC-1 (Indicator) 3rd < 0.002 < 0.002 APE-30 (Control) 3rd < 0.003 < 0.002 APE-i (Indicator) 4th < 0.003 < 0.003 APQ-i (Indicator) 4th < 0.002 < 0.002 APP-i (Indicator) 4th < 0.004 < 0.003 APC-i (Indicator) 4th < 0.002 < 0.002 APE-30 (Control) 4th < 0.003 < 0.002 34

Annual Radiological 2015 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 lstQtrl5 2ndQtrl5 3rdQtrl5 4thQtr15 Annual Mean 15 A-2 13 12 14 13 13 A-5 13 12 13 13 12 B-i 13 12 13 14 13 B-4 13 12 14 14 13 c-i 9 8 9 10 9 D-2 13 11 12 13 12 D-5 12 11 ii 12 ii Ei ii 10 ii ii ii E-5 13 12 13 13 13 E-i5 ii 9 10 10 10 F-2 12 12 12 12 12 F-4 1 14 14 14 14 14 F-9 12 13 (2) 12 12 G2 11 11 ii 12 11 G4 (2) ii 11 11 G8 11 (2) (2) 11 H-2 ii 10 ii 10 10 H8 14 (2) ii (2) 12 J-2 10 10 10 10 J-15 13 13 13 13 13 Ki (2) 10 11 11 10 L-1 14 14 14 13 14 M-i 10 10 10 10 10 Ni (2) 11 10 ii 11 P-i 9 10 9 10 9 P-6 13 13 13 13 13 Q-i 13 12 12 12 12 (2) 13 13 13 13 R-i 9 9 9 10 9 R-6 10 10 io 10 10 Control Location Station 1st Qtr 15 2ndQtr15 3rdQtri5 4th Qtr .15 Annual Mean 15 E-30 10 9 10 11 10 (1)

Location with highest annual mean (2)

No data TLDs missing at time of exchange 35

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.1 Sample Type: DrinkinqlSurface Water Analysis: Gross Beta Units: pCi/I Quarterly DWFISWF-2 DWE/SWE-5 DWP/SWP-7 Composite (Indicator) (Indicator) (Control)

Required LLD p. 4 4 4 st.

1 6.89 3.77 4.73 2 6.05 4.26 5.54 rd 3

7.53 5.15 5.63 tb 4

8.13 4.10 2.71 36

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.2 Sample Type: Drinkini/Surface Water Analysis: lodine-131 Units: pCi/I Collection SWK-1 DWFISWF-2 DWE/SWE-5 DWP/SWP-7 Date (Indicator) (Indicator) (Indicator) (Control)

LLD 15 1 1 1 012715h1) <0.49 01 15 <3.91 <0.47 <0.40 <0.49 02-24-15 <5.49 <0.55 <0.67 <0.71 03-24-15 <3.52 <0.53 <0.50 <0.57 04-21-15 <1.70 <0.58 <0.70 <0.75 05-19-15 <4.75 <0.33 <0.42 <0.40 06-16-15 <3.76 <0.29 <0.82 <0.35 07-13-15 <3.87 <0.40 <0.39 <0.52 08-11-15 <6.08 <0.77 <0.72 <0.80 09-08-15 <3.98 <0.44 <0.46 <0.51 10-06-15 <4.98 <0.40 <0.51 <0.38 11-03-15 <4.81 <0.68 <0.76 <0.89 12-01 -15 <3.73 <0.75 <0.74 <0.82 12-29-15 <6.07 <0.43 <0.41 <0.52 (1)

Duplicate sample 37

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.3 Sample Type: DrinkinglSurface 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 ReguiredLLD 15 15 30 15 30 15 15 15 18 15 15 DWF/SWF-2 (Indicator) 1st < 1.78 < 1.77 < 3.81 < 1.73 < 3.68 < 1.93 < 3.32 < 1.73 < 1.92 < 9.83 < 2.91 DWE/SWE-5 (Indicator) 1st < 1.77 < 1.96 < 3.91 < 1.70 < 3.74 < 1.96 < 3.51 < 1.83 < 2.03 < 10.20 < 2.93 DWPISWP-7 (Control) 1st < 1.19 < 1.27 < 2.60 < 1.11 < 2.33 < 1.37 < 2.40 < 1.22 < 1.33 < 7.52 < 2.09 DWFISWF-2 (Indicator) 2nd < 1.63 < 1.69 < 3.87 < 1.68 < 3.73 < 1.78 < 2.99 < 1.58 < 1.76 < 8.95 < 2.87 DWEISWE-5 (Indicator) 2nd < 2.04 < 1.93 < 4.45 < 1.99 < 3.98 < 2.12 < 3.62 < 1.99 < 2.23 < 11.40 < 3.57 DWPISWP-7 (Control) 2nd < 1.59 < 1.46 < 3.48 < 1.71 < 3.22 < 1.73 < 2.75 < 1.50 < 1.78 < 8.38 < 2.88 DWFISWF-2 (Indicator) 3rd < 1.76 < 1.88 < 3.94 < 2.12 < 3.70 < 1.95 < 3.18 < 1.65 < 1.87 < 8.53 < 2.70 DWEISWE-5 (Indicator) 3rd < 2.32 < 2.43 < 5.42 < 2.57 < 4.32 < 2.35 < 4.39 < 2.16 < 2.40 < 10.70 < 3.50 DWP/SWP-7 (Control) 3rd < 1.95 < 1.89 < 3.98 < 2.17 < 3.86 < 2.07 < 3.42 < 1.87 < 2.05 < 9.87 < 3.09 DWFISWF-2 (Indicator) 4th < 3.05 < 3.26 < 6.41 < 3.29 < 5.99 < 3.16 < 5.59 < 2.75 < 3.04 < 14.30 < 5.51 DWEISWE-5 (Indicator) 4th < 2.63 < 2.96 < 5.34 < 2.37 < 5.42 < 2.68 < 5.24 < 2.47 < 3.00 < 12.70 < 3.61 DWPISWP-7 (Control) 4th < 2.53 < 2.68 < 5.70 < 2.94 < 5.14 < 2.55 < 4.88 < 2.53 < 2.77 < 12.70 < 3.61 38

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 3.4 Sample Type: DrinkinglSurface Water Analysis: Tritium Units: pCi/I Quarter DWFISWF-2 DWE/SWE-5 SWK-1 DWPISWP-7 (Indicator) (Indicator) (Indicator) (Control)

Required LLD

2000 2000 3000 st 1

<486 <468 <482 <479 2 < 563 < 566 < 569 < 564 rd 3

<699 <711 <718 <719 th 4

< 734 < 725 < 724 < 742 39

Annual Radiological 2015 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 ReguiredLLD 15 15 30 15 30 15 15 15 18 15 15 SWK-l 01-27-15 < 2.17 < 2.28 < 5.05 < 2.41 < 4.59 < 2.33 < 4.03 < 2.08 < 2.24 < 11.20 < 3.71 (Indicator) 02-24-15 < 2.61 < 2.78 < 5.68 < 2.64 < 4.93 < 2.75 < 5.38 < 2.66 < 3.27 < 14.20 < 4.62 03-24-15 < 1.78 < 1.74 < 4.03 < 1.97 < 3.81 < 1.94 < 3.28 < 1.69 < 1.83 < 9.19 < 2.92 04-21-15 < 1.23 < 1.28 < 2.60 < 1.27 < 2.72 < 1.39 < 2.28 < 1.27 < 1.42 < 5.17 < 1.61 05-19-15 < 2.70 < 2.49 < 4.97 < 2.42 < 4.96 < 2.43 < 4.35 < 2.26 < 2.64 < 12.30 < 4.20 06-16-15 < 2.85 < 3.06 < 5.56 < 3.13 < 5.46 < 3.02 < 5.42 < 2.98 < 3.14 < 13.30 < 3.51 07-13-15 <2.46 <2.39 <5.00 <2.41 <4.94 <2.64 <4.29 <2.78 <2.77 < 11.80 <3.37 08-11-15 < 3.36 < 2.91 < 5.61 < 3.56 < 5.18 < 3.40 < 5.47 < 2.99 < 3.30 < 14.50 < 4.18 09-08-15 < 3.05 < 2.61 < 4.93 < 3.22 < 6.23 < 2.79 < 4.77 < 2.85 < 3.66 < 12.40 < 3.71 10-06-15 < 2.56 < 2.63 < 5.23 < 2.43 < 4.65 < 2.59 < 4.72 < 2.55 < 2.66 < 13.00 < 4.34 11-03-15 <3.77 <3.69 <7.49 <4.23 <6.22 <3.35 <6.51 <3.47 <3.79 < 13.40 <5.16 12-01-15 < 1.75 < 1.82 < 3.84 < 1.80 < 3.57 < 1.93 < 3.31 < 1.74 < 1.93 < 9.14 < 3.29 12-29-15 < 2.64 < 3.10 < 6.06 < 3.09 < 5.53 < 2.78 < 4.65 < 2.72 < 2.47 < 14.90 < 4.38 40

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 4.1 Sample Type: Sediment Analysis: Gamma Isotopic Units: pCi/kg (dry)

Location Collection Cs-I 34 Cs-I 37 Date Required LLD 150 180 SHWK-1 (Indicator) 03-18-15 <61.3 <81.8 SHWE-3 (Indicator) 03-18-15 <60.2 <80.4 SHWQ-6 (Control) 03-18-15 < 27.9 < 34.3 41

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 5.1 Sample Type: !.i!

Analysis: Iodine-i 31 and Gamma Isotopic Units: pCi/I Location Collection 1-131 Cs-134 Cs-137 Ba-140 La-140 Date Required LLD* 1 1 1 1 MKE-3 (Indicator) (1)031915 n/a n/a n/a n/a n/a (1)061115 n/a n/a n/a n/a n/a (1)091015 n/a n/a n/a n/a n/a (1) 12-14-15 n/a n/a n/a n/a n/a MKA-31 (Control) 03-19-15 <0.34 <2.47 < 4.31 <11.90 <3.31 06-1 1-15 <0.23 <2.00 < 2.65 <11.80 <3.76 09-10-15 <0.17 <2.67 < 3.33 <13.10 <3.70 12-14-15 <0.99 <5.53 < 5.53 <14.30 <6.12 Sample not available. Cows not producing enough milk. See page 2 for details.

42

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 6.1 Sample Type: EIh Analysis: Gamma Isotopic Units: pCi/kg (wet)

Location Collection Species Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-I 34 Cs-I 37 Date Required LLD 130 130 260 130 260 130 150 FH-1 (Control) 10-22-15 Buffalo < 44.0 < 36.4 < 91.9 < 19.7 < 85.0 < 50.8 < 53.7 10-22-15 Carp < 49.1 < 40.3 < 79.6 < 54.4 < 03.0 < 48.3 < 46.7 10-20-15 Catfish <42.4 <39.8 <97.9 <40.2 <75.9 <45.4 <50.9 10-22-15 Bass < 37.9 < 37.1 < 76.7 < 34.8 < 78.6 < 30.0 < 35.5 FH-2 (Indicator) 10-20-15 Buffalo < 68.1 < 72.3 <151.0 < 60.5 < 177.0 < 73.8 < 67.4 10-20-15 Carp < 44.7 < 36.5 < 75.7 < 46.7 < 103.0 < 46.8 < 44.7 10-20-15 Catfish < 40.8 < 38.8 < 83.9 < 44.0 < 102.0 < 40.2 < 38.4 10-20-15 Mullet < 76.6 < 70.9 <174.0 < 52.6 < 169.0 < 64.4 < 68.5 FH-3 (Indicator) 10-15-15 Buffalo < 62.0 < 80.4 < 118.0 < 66.3 < 178.0 < 67.4 < 74.2 10-15-15 Carp <39.5 <30.0 < 76.6 <48.3 < 79.4 <30.6 <40.5 10-15-15 Catfish <104.0 < 87.4 < 224.0 < 50.5 < 173.0 < 93.4 < 82.0 10-21-15 Catfish < 69.3 < 76.6 < 141.0 < 82.6 < 77.6 < 48.1 < 71.5 10-15-15 Mullet < 56.2 < 73.9 < 159.0 < 78.0 < 166.0 < 66.0 < 81.0 43

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 7.1 Sample Type: Broad Leaf Vegetation Analysis: Iodine-i 31 and Gamma Isotopic Units: pCi/kg (wet)

Location Collection 1-131 Cs-I 34 Cs-i 37 Date Required LLD BLQ-1 (Indicator) 03-18-15 < 35.9 < 18.9 < 21.6 BLQ-1 (Indicator) 06-i 0-15 < 38.7 < 17.2 < 17.4 BLQ-1 (Indicator) 09-09-15 < 58.7 < 37.1 < 43.2 BLQ-1 (Indicator) 12-09-15 <46.8 <25.7 <27.7 BLB-1 (Indicator) 03-18-15 < 31.3 < 19.3 < 20.6 BLB-1 (Indicator) 06-10-15 < 43.8 < 19.2 < 22.8 BLB-1 (Indicator) 09-09-15 < 57.8 < 31.1 < 36.4 BLB-1 (Indicator) 12-09-15 < 54.6 < 33.8 < 37.7 BLE-20 (Control) 03-i 8-15 < 24.8 < 13.2 < 14.1 BLE-20 (Control) 06-10-15 < 38.0 < 18.1 < 18.4 BLE-20 (Control) 09-09-15 < 52.6 < 31.8 < 39.7 BLE-20 (Control) 12-09-15 < 54.5 < 36.4 < 32.5 44

Annual Radiological 2015 Environmental Operating Report Waterlord 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratory Comparison Analysis: Gross Beta, Iodine-i 31, Tritium and Gamma Isotopic Units: pCi/kg (wet)

ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES Month/Year ID Number Matrix Nuclide Units Reported Known Ratio (c) Evaluation Value (a) Value (b) TBE/Analytics (ci)

March 2015 Eil182 Milk 1-131 pCi/L 61.3 65.1 0.94 A Ce-141 pCi/L 104 113 0.92 A Cr-51 pCi/L 265 276 0.96 A Cs-134 pCi/L 138 154 0.90 A Cs-i 37 pCi/L 205 207 0.99 A Co-58 pCi/L 178 183 0.97 A Mn-54 pCi/L 187 188 0.99 A Fe-59 pCi/L 182 177 1.03 A Zn-65 pCi/L 345 351 0.98 A Co-60 pCi/L 379 405 0.94 A Eli 184 AP Ce-141 oCi 107 85.0 1.26 w Cr-Si oCi 261 224 1.17 A Cs-134 pCi 74.6 77.0 0.97 A Cs-i37 pCi 99.6 102 0.98 A Co-58 pCi 99.8 110 0.91 A Mn-54 pCi 99.2 96.9 1.02 A Fe-59 pCi 109 119 0.92 A Zn-65 pCi 188 183 1.03 A Co-60 DCI 200 201 1.00 A El 1183 Charcoal 1-131 DCI 82.9 85.4 0.97 A June 2015 E1i238 Milk -131 DCi/L 93.2 95.9 0.97 A Ce-i 41 DC1/L Not in this Study Cr-5i oCi/L 349 276 .26 W Cs-i 34 pCi/L 165 163 .01 A Cs-137 pCi/L 143 125 .14 A Co-58 pCi/L 82.0 68.4 .20 A Mn-54 pCi/L 113 101 .12 A Fe-59 pCi/L 184 151 1.22 w Zn-65 pCi/L 269 248 1.08 A Co-60 pCi/L 208 193 1.08 A Eii237 AP Ce-i4i pCi Not in this Study Cr-51 pCi 323 233 1.39 N (1)

Cs-i 34 pCi 139 138 1.01 A Cs-i 37 pCi iii 106 1.05 A Co-58 PCi 54.0 57.8 0.93 A Mn-54 DCI 96.8 84.9 i.i4 A Fe-59 pCi 162 128 1.27 W Zn-65 pCi 198 210 0.94 A Co-60 DCi 178 163 1.09 A E11236 Charcoal 1-131 oCi 93.9 80 1.17 A September2015 Eii290 Milk 1-131 pCi/L 94.9 99.9 0.95 A Ce-141 pCi/L 228 213 1.07 A Cr-5i pCi/L 499 538 0.93 A Cs-134 pCi/L 208 212 0.98 A Cs-137 pCi/L 270 255 1.06 A Co-58 pCi/L 275 263 1.05 A Mn-54 pCi/L 320 290 1.10 A Fe-59 pCi/L 255 226 1.13 A Zn-65 pCi/L 392 353 1.11 A Co-60 pCi/L 350 330 1.06 A 45

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Gross Beta, Iodine-i 31, Tritium and Gamma Isotopic Units: pCi/kg (wet)

Month/Year ID Number Matrix Nuclide Units Reported Known Ratio (C) Evaluation Value (a) Value (b) TBE/Analytics (d)

September2015 E11292 AP Ce-141 pCi 104 85.1 1.22 W Cr-51 pCi 262 215 1.22 W Cs-134 pCi 86.1 84.6 1.02 A Cs-137 pCi 93.0 102 0.91 A Co-58 pCi 106 105 1.01 A Mn-54 pCi 117 116 1.01 A Fe-59 pCi 94.8 90.2 1.05 A Zn-65 pCi 160 141 1.13 A Co-60 pCi 146 132 1.11 A E11291 Charcoal 1-131 pCi 85.9 81.7 1.05 A E11294 Soil Ce-141 pCi/Kg 209 222 0.94 A Cr-51 pCi/Kg 463 560 0.83 A Cs-i 34 pCi/Kg 231 221 1.05 A Cs-137 pCi/Kg 311 344 0.90 A Co-58 pCi/Kg 245 274 0.89 A Mn-54 pCi/Kg 297 302 0.98 A Fe-59 pCi/Kg 248 235 1.06 A Zn-65 pCi/Kg 347 368 0.94 A Co-60 pCi/Kg 328 344 0.95 A December2015 E113550 Milk 1-131 pCi/L 95.1 91.2 1.04 A Ce-14i pCi/L 117 129 0.91 A Cr-5i pCi/L 265 281 0.94 A Cs-i34 pCi/L 153 160 0.96 A Cs-137 pCi/L 119 115 1.03 A Co-58 pCi/L 107 110 0.97 A Mn-54 pCi/L 153 145 1.06 A Fe-59 pCi/L 117 108 1.08 A Zn-65 pCi/L 261 248 1.05 A Co-60 pCi/L 212 213 1.00 A E11357 AP Ce-141 pCi 89.9 84.0 1.07 A Cr-5i pCi 215 184 1.17 A Cs-i 34 pCi 103 105 0.98 A Cs-i 37 pCi 76.6 74.8 1.02 A Co-58 pCi 76.2 71.9 1.06 A Mn-54 pCi 91.4 94.4 0.97 A Fe-59 pCi 78.6 70.3 1.12 A Zn-65 pCi 173 162 1.07 A Co-60 pCi 138 139 0.99 A Ei1356 Charcoal 1-131 pCi 74.9 75.2 1.00 A 46

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Gross Beta, Iodine-i 31, Tritium and Gamma Isotopic Units: pCi/kg (wet)

Month/Year ID Number Matrix Nuclide Units Reported Known Ratio (c) Evaluation Value (a) Value (b) TBE/Analytics (d)

December 2015 E11353 Soil Ce-141 pCi/kg 252 222 1.14 A Cr-51 pci/kg 485 485 1.00 A Cs-134 pci/kg 319 277 1.15 A cs-137 pci/kg 292 276 1.06 A co-58 pci/kg 193 190 1.02 A Mn-54 pci/kg 285 250 1.03 A Fe-59 pci/kg 218 186 1.17 A Zn-65 pci/kg 457 429 1.07 A co-6o pci/kg 381 368 1.04 A (1) Cr-51 has the shortest half-life and the weakest gamma energy of the mixed nuclide sample which produces a large error.

Taking in account the error, the lowest value would be 119% of the known value which is considered acceptable. NCR 15-18 (a) Teledyne Brown Engineering reported result.

(b) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

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

(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable, reported result falls within ratio limits of 0.80-i .20.

W-Acceptable with warning, reported result falls within 0.70-0.80 or 1.20-1 .30. N = Not Acceptable, reported results falls outside the ratio limits of <0.70 and >1.30.

47

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Gross Beta, lodine-131, Tritium and Gamma Isotopic Units: pCi/kg (wet)

DOEs MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING ENVIRONMENTAL SERVICES Month/Year ID Number Matrix Nuclide Units Reported Known Acceptance Evaluation Value (a) Value (b) Range (c)

March 2015 15-GrF32 AP Gr-B Bg/sample 0.7580 0.75 0.38 -1.13 A 15-RdV32 Veaetation Cs-134 Ba/samDle 8.08 7.32 5.129.52 A Cs-i 37 Ba/sam Die 11.6 9.18 6.43 11.93 w Co-57 Bq/sample -0.0096 False oositive test A Co-60 Bq/sam pie 6.53 5.55 3.89 7.22 A Mn-54 Bq/sample 0.0058 False p sitive test A Zn-65 Bq/sam pie -0.108 False positive test A September2015 15-GrF33 AP Gr-B Bq/sample 1.34 1.56 0.782.34 A 15-RdV33 Veaetation Cs-134 Ba/samDle 6.10 5.80 4.067.54 A Cs-i 37 Ba/samole 0.0002 False oositive test A Co-57 Bq/sarn pie 8.01 6.62 4.63 8.61 w Co-60 Bq/sample 4.97 4.56 3.19 5.93 A Mn-54 Bq/sam pie 8.33 7.68 5.39 9.98 A

Zn-65 Bq/sample 6.07 5.46 3.82 7.10 A (a) Teledyne Brown Engineering reported result.

(b) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(c) DOE/MAPEP evaluation: A=acceptable; Wacceptable with warning; Nnot acceptable.

48

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station Table 8.1 Sample Type: Interlaboratorv Comparison Analysis: Gross Beta, lodine-131, Tritium and Gamma Isotopic Units: pCi/kg (wet)

Month/Year ID Number Matrix Nuclide Units Reported Known Acceptance Evaluation Value (a) Value (b) Limits (c)

May 2015 RAD-lOl Water H-3 pCi/L 3145 3280 2770 3620 A Ba-133 pCi/L 80.6 82.5 63.990.8 A Cs-134 pCi/L 71.7 75.7 61.8 83.3 A Cs-137 pCi/L 187 189 170210 A Co-60 pCi/L 85.7 84.5 76.095.3 A Zn-65 pCi/L 197 203 183 238 A Gr-B pCi/L 28.8 32.9 21.340,6 A 1-131 pCi/L 23.5 23.8 19.7 28.3 A November 2015 RAD-103 Water H-3 pCi/L 21100 21300 18700 -23400 A Ba-133 pCi/L 31.5 32.5 25.936.7 A Cs-134 pCi/L 59.65 62.3 50.668.5 A Cs-137 pCi/L 156 157 141 175 A Co-60 pCi/L 70.6 71.1 64.080.7 A Zn-65 pCi/L 145 126 113 149 A Gr-B pCi/L 42.0 36.6 24.144.2 A 1-131 pCi/L 24.8 26.4 21.931.0 A (a) Teledyne Brown Engineering reported result.

(b) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or Volumetric measurements made during standard preparation.

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

49

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station ATTACHMENT 2 Statistical Comparisons 50

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station TABLE OF CONTENTS TABLE 2.1 STATISTICAL COMPARISON OF 2015 TLD MEASUREMENTS FROM STATIONS GROUPED BY DISTANCE 54 TABLE 2.2 STATISTICAL COMPARISON OF 2015 TLD RADIATION DOSE TO HISTORICAL DATA BY LOCATION 55 TABLE 2.3 STATISTICAL COMPARISON OF 2015 GROSS BETA ACTIVITY MEASUREMENTS ON AIR PARTICULATE FILTERS 56 TABLE 2.4 STATISTICAL COMPARISON OF 2015 GROSS BETA ACTIVITY MEASUREMENTS IN DRINKING/SURFACE WATER SAMPLES 57 51

Annual Radiological 2015 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:

x=L 1=1 and 0.5 fl (x 2 X) i=1 (ii -1) where:

X = mean of sample population, S = standard deviation of sample population, n = number of samples in sample population, and X, = value of the ith sample.

52

Annual Radiological 2015 Environmental Operating 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)):

xY 0.5 1

+

fly where:

= calculated t value, X = mean of first data set, Y = mean of second data set,

= number of variables in first data set, S = standard deviation of first data set,

= number of variables in second data set, and S ,, = 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

) is equal to the true mean of the second population (m ,) assuming that the true standard deviation of both populations are equal (m = m s,). The calculated t value is compared to a tabular t value such that:

a if t > t then reject the hypothesis when m > m

b. if t < -t then reject the hypothesis when m < m

c. if t > t then reject the hypothesis when m = m where t jil2,n and t , are the tabular t values, with a preselected error (5%), confidence level (1 -

p) or (1- p12), and degrees of freedom n = n + n 2. Tabular values of the t were obtained from the CRC Standard Mathematical Tables, 26th Edition (1981).

53

Annual Radiological 2015 Environmental Ooeratina Reoort Waterford 3 Steam Electric Station TABLE 2.1 STATISTICAL COMPARISON OF 2015 TLD MEASUREMENTS FROM STATIONS GROUPED BY DISTANCE Stations Located 0-2 Stations Located 2-5 Stations Located more than Miles from the Plant Miles from the Plant 5 Miles from the Plant Mean 11 13 12 (mRemlstd.qtr.)

Standard Deviation 1.46 1.03 1.43 (mRemlstd. qtr.)

Number in Sample 62 26 23 1.32 2.71 NA*

Calculated t Value (comparison of stations 0-2 and 2-5 miles from the plant to stations >5 miles from the plant) 1.992(a) 2.014(b) NA*

Tabular t Value at

,)

0025 95% Confidence(t (a) Results indicate the mean for stations located 0-2 miles from the plant are statistically identical to the mean for stations located more than 5 miles from the plant.

(b) Although the TLD stations located 2-5 miles from the plant are statistically higher than those located more than 5 miles from the plant, the quarterly doses measured in 2015 are consistent with historical data at each location as shown in Table 2.2.

Not Applicable 54

Annual Radiological 2015 Environmental Qoeratinci Report Waterford 3 Steam Electric Station TABLE 2.2 STATISTICAL COMPARISON OF 2015 TLD RADIATION DOSE TO HISTORICAL DATA BY LOCATION Units: mrem/Std. Qtr.

2015 Station 1990- 2014 Avg** 1990- 2014 Std. Dev. 1990- 2014 Range 2015 Avg** 2015 Std Dev** Range A-2 13 1.4 10 18 13 0.6 12 14 A-5 13 1.4 10 17 13 0.6 12 13 B-i 13 1.3 10 19 13 0.8 12 14 B-4 13 1.1 11 17 13 0.6 12 14 c-i 9 1.2 7 13 9 0.5 8 10 D-2 12 1.9 8 19 12 0.6 11 13 D-5 12 1.4 9 18 ii 0.3 11 12 E-1 ii 1.2 9 16 11 0.7 10 11 E-5 12 1.6 9 17 13 0.3 12 13 E-15 11 1.6 8 16 10 0.4 9 11 E30* 11 1.5 8 17 10 0.7 9 11 F-2 12 1.1 10 17 12 0.1 12 12 F-4 14 1.4 11 19 14 0.2 14 15 F-9 12 1.3 7 17 12 0.2 12 13 G-2 14 1.8 10 19 11 0.4 11 12 G-4 11 1.2 9 16 11 0.1 11 ii G-8 12 1.9 8 19 11 0.2 ii ii H-2 13 1.3 10 18 10 0.2 10 11 H-8 12 1.2 9 17 12 1.3 11 14 J-2 12 1.5 10 17 11 0.5 10 11 J-15 13 1.2 11 17 13 0.1 13 13 K-i 11 1.2 9 16 10 0.2 10 11 L-i 13 1.4 10 16 14 0.2 14 14 M-1 12 1.5 9 18 10 0.2 10 11 N-i 13 1.5 8 18 11 0.2 10 11 P-i 10 1.2 7 15 10 0.2 9 10 P-6 14 1.3 10 19 13 0.2 13 13 Q-1 12 1.2 10 16 12 0.3 12 13 Q-5 13 2.1 9 18 13 0.2 13 13 R-i 10 1.9 6 15 9 0.1 9 10 R-6 12 2.4 8 18 10 0.2 10 10 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 ii to 33 and an average control of 18 mrem.

55

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 2.3 STATISTICAL COMPARISON OF 2015 GROSS BETA ACTIVITY MEASUREMENTS ON AIR PARTICULATE FILTERS SAMPLE STATION APF-1 APQ-1 APP-I APC-I APE-30 Mean 19 18 18 18 19 (1 3 pCiIm W

)

Standard Deviation 4.15 3.85 3.65 4.42 4.91 pCi/m O

)

(1 3 Number in Sample 26 26 25 26 25 CalculatedtValue 0.21 0.86 1.14 1.05 NA*

(comparison of the indicator stations to the control station)

TabulartValueat 2.012(a) 2.012(a) 2.013(a) 2.012(a) NA*

95% ) 025 0

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

Not Applicable 56

Annual Radiological 2015 Environmental Operating Report Waterford 3 Steam Electric Station TABLE 2.4 STATISTICAL COMPARISON OF 2015 GROSS BETA ACTIVITY MEASUREMENTS IN DRINKING/SURFACE WATER SAMPLES DWFISWF-2 DWE1SWE-5 DWPISWP-7 Mean 7.2 4.3 4.7 (pCilliter)

Standard Deviation 0.77 0.51 1.17 (pCilliter)

Number in Sample 4 4 4 3.55 0.52 NA*

Calculated t Value (comparison of the indicator stations to the control station) 2.447(b) 2.447(a) NA*

Tabular t Value at 95% 25.o 0

Confidence(t

,)

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

(b) Results indicate the mean for the indicator station is statistically higher than the mean for the control location. Results obtained in 2015 are consistent with historical data as stated in section 2.3.

Not Applicable 57